PostgreSQL Source Code git master
Data Structures | Macros | Typedefs | Enumerations | Functions | Variables
guc.h File Reference
#include "nodes/parsenodes.h"
#include "tcop/dest.h"
#include "utils/array.h"
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Data Structures

struct  ConfigVariable
 
struct  config_enum_entry
 

Macros

#define MAX_KILOBYTES   (INT_MAX / 1024)
 
#define PG_AUTOCONF_FILENAME   "postgresql.auto.conf"
 
#define GUC_QUALIFIER_SEPARATOR   '.'
 
#define GUC_LIST_INPUT   0x000001 /* input can be list format */
 
#define GUC_LIST_QUOTE   0x000002 /* double-quote list elements */
 
#define GUC_NO_SHOW_ALL   0x000004 /* exclude from SHOW ALL */
 
#define GUC_NO_RESET   0x000008 /* disallow RESET and SAVE */
 
#define GUC_NO_RESET_ALL   0x000010 /* exclude from RESET ALL */
 
#define GUC_EXPLAIN   0x000020 /* include in EXPLAIN */
 
#define GUC_REPORT   0x000040 /* auto-report changes to client */
 
#define GUC_NOT_IN_SAMPLE   0x000080 /* not in postgresql.conf.sample */
 
#define GUC_DISALLOW_IN_FILE   0x000100 /* can't set in postgresql.conf */
 
#define GUC_CUSTOM_PLACEHOLDER   0x000200 /* placeholder for custom variable */
 
#define GUC_SUPERUSER_ONLY   0x000400 /* show only to superusers */
 
#define GUC_IS_NAME   0x000800 /* limit string to NAMEDATALEN-1 */
 
#define GUC_NOT_WHILE_SEC_REST   0x001000 /* can't set if security restricted */
 
#define GUC_DISALLOW_IN_AUTO_FILE    0x002000 /* can't set in PG_AUTOCONF_FILENAME */
 
#define GUC_RUNTIME_COMPUTED   0x004000 /* delay processing in 'postgres -C' */
 
#define GUC_ALLOW_IN_PARALLEL   0x008000 /* allow setting in parallel mode */
 
#define GUC_UNIT_KB   0x01000000 /* value is in kilobytes */
 
#define GUC_UNIT_BLOCKS   0x02000000 /* value is in blocks */
 
#define GUC_UNIT_XBLOCKS   0x03000000 /* value is in xlog blocks */
 
#define GUC_UNIT_MB   0x04000000 /* value is in megabytes */
 
#define GUC_UNIT_BYTE   0x05000000 /* value is in bytes */
 
#define GUC_UNIT_MEMORY   0x0F000000 /* mask for size-related units */
 
#define GUC_UNIT_MS   0x10000000 /* value is in milliseconds */
 
#define GUC_UNIT_S   0x20000000 /* value is in seconds */
 
#define GUC_UNIT_MIN   0x30000000 /* value is in minutes */
 
#define GUC_UNIT_TIME   0x70000000 /* mask for time-related units */
 
#define GUC_UNIT   (GUC_UNIT_MEMORY | GUC_UNIT_TIME)
 
#define EmitWarningsOnPlaceholders(className)   MarkGUCPrefixReserved(className)
 
#define GUC_check_errmsg
 
#define GUC_check_errdetail
 
#define GUC_check_errhint
 

Typedefs

typedef struct ConfigVariable ConfigVariable
 
typedef struct config_generic config_handle
 
typedef bool(* GucBoolCheckHook) (bool *newval, void **extra, GucSource source)
 
typedef bool(* GucIntCheckHook) (int *newval, void **extra, GucSource source)
 
typedef bool(* GucRealCheckHook) (double *newval, void **extra, GucSource source)
 
typedef bool(* GucStringCheckHook) (char **newval, void **extra, GucSource source)
 
typedef bool(* GucEnumCheckHook) (int *newval, void **extra, GucSource source)
 
typedef void(* GucBoolAssignHook) (bool newval, void *extra)
 
typedef void(* GucIntAssignHook) (int newval, void *extra)
 
typedef void(* GucRealAssignHook) (double newval, void *extra)
 
typedef void(* GucStringAssignHook) (const char *newval, void *extra)
 
typedef void(* GucEnumAssignHook) (int newval, void *extra)
 
typedef const char *(* GucShowHook) (void)
 

Enumerations

enum  GucContext {
  PGC_INTERNAL , PGC_POSTMASTER , PGC_SIGHUP , PGC_SU_BACKEND ,
  PGC_BACKEND , PGC_SUSET , PGC_USERSET
}
 
enum  GucSource {
  PGC_S_DEFAULT , PGC_S_DYNAMIC_DEFAULT , PGC_S_ENV_VAR , PGC_S_FILE ,
  PGC_S_ARGV , PGC_S_GLOBAL , PGC_S_DATABASE , PGC_S_USER ,
  PGC_S_DATABASE_USER , PGC_S_CLIENT , PGC_S_OVERRIDE , PGC_S_INTERACTIVE ,
  PGC_S_TEST , PGC_S_SESSION
}
 
enum  GucAction { GUC_ACTION_SET , GUC_ACTION_LOCAL , GUC_ACTION_SAVE }
 

Functions

bool ParseConfigFile (const char *config_file, bool strict, const char *calling_file, int calling_lineno, int depth, int elevel, ConfigVariable **head_p, ConfigVariable **tail_p)
 
bool ParseConfigFp (FILE *fp, const char *config_file, int depth, int elevel, ConfigVariable **head_p, ConfigVariable **tail_p)
 
bool ParseConfigDirectory (const char *includedir, const char *calling_file, int calling_lineno, int depth, int elevel, ConfigVariable **head_p, ConfigVariable **tail_p)
 
void FreeConfigVariables (ConfigVariable *list)
 
char * DeescapeQuotedString (const char *s)
 
void SetConfigOption (const char *name, const char *value, GucContext context, GucSource source)
 
void DefineCustomBoolVariable (const char *name, const char *short_desc, const char *long_desc, bool *valueAddr, bool bootValue, GucContext context, int flags, GucBoolCheckHook check_hook, GucBoolAssignHook assign_hook, GucShowHook show_hook) pg_attribute_nonnull(1
 
void void DefineCustomIntVariable (const char *name, const char *short_desc, const char *long_desc, int *valueAddr, int bootValue, int minValue, int maxValue, GucContext context, int flags, GucIntCheckHook check_hook, GucIntAssignHook assign_hook, GucShowHook show_hook) pg_attribute_nonnull(1
 
void void void DefineCustomRealVariable (const char *name, const char *short_desc, const char *long_desc, double *valueAddr, double bootValue, double minValue, double maxValue, GucContext context, int flags, GucRealCheckHook check_hook, GucRealAssignHook assign_hook, GucShowHook show_hook) pg_attribute_nonnull(1
 
void void void void DefineCustomStringVariable (const char *name, const char *short_desc, const char *long_desc, char **valueAddr, const char *bootValue, GucContext context, int flags, GucStringCheckHook check_hook, GucStringAssignHook assign_hook, GucShowHook show_hook) pg_attribute_nonnull(1
 
void void void void void DefineCustomEnumVariable (const char *name, const char *short_desc, const char *long_desc, int *valueAddr, int bootValue, const struct config_enum_entry *options, GucContext context, int flags, GucEnumCheckHook check_hook, GucEnumAssignHook assign_hook, GucShowHook show_hook) pg_attribute_nonnull(1
 
void void void void void void MarkGUCPrefixReserved (const char *className)
 
const char * GetConfigOption (const char *name, bool missing_ok, bool restrict_privileged)
 
const char * GetConfigOptionResetString (const char *name)
 
int GetConfigOptionFlags (const char *name, bool missing_ok)
 
void ProcessConfigFile (GucContext context)
 
char * convert_GUC_name_for_parameter_acl (const char *name)
 
void check_GUC_name_for_parameter_acl (const char *name)
 
void InitializeGUCOptions (void)
 
bool SelectConfigFiles (const char *userDoption, const char *progname)
 
void ResetAllOptions (void)
 
void AtStart_GUC (void)
 
int NewGUCNestLevel (void)
 
void RestrictSearchPath (void)
 
void AtEOXact_GUC (bool isCommit, int nestLevel)
 
void BeginReportingGUCOptions (void)
 
void ReportChangedGUCOptions (void)
 
void ParseLongOption (const char *string, char **name, char **value)
 
const char * get_config_unit_name (int flags)
 
bool parse_int (const char *value, int *result, int flags, const char **hintmsg)
 
bool parse_real (const char *value, double *result, int flags, const char **hintmsg)
 
int set_config_option (const char *name, const char *value, GucContext context, GucSource source, GucAction action, bool changeVal, int elevel, bool is_reload)
 
int set_config_option_ext (const char *name, const char *value, GucContext context, GucSource source, Oid srole, GucAction action, bool changeVal, int elevel, bool is_reload)
 
int set_config_with_handle (const char *name, config_handle *handle, const char *value, GucContext context, GucSource source, Oid srole, GucAction action, bool changeVal, int elevel, bool is_reload)
 
config_handle * get_config_handle (const char *name)
 
void AlterSystemSetConfigFile (AlterSystemStmt *altersysstmt)
 
char * GetConfigOptionByName (const char *name, const char **varname, bool missing_ok)
 
void TransformGUCArray (ArrayType *array, List **names, List **values)
 
void ProcessGUCArray (ArrayType *array, GucContext context, GucSource source, GucAction action)
 
ArrayType * GUCArrayAdd (ArrayType *array, const char *name, const char *value)
 
ArrayType * GUCArrayDelete (ArrayType *array, const char *name)
 
ArrayType * GUCArrayReset (ArrayType *array)
 
void * guc_malloc (int elevel, size_t size)
 
pg_nodiscard void * guc_realloc (int elevel, void *old, size_t size)
 
char * guc_strdup (int elevel, const char *src)
 
void guc_free (void *ptr)
 
Size EstimateGUCStateSpace (void)
 
void SerializeGUCState (Size maxsize, char *start_address)
 
void RestoreGUCState (void *gucstate)
 
void ExecSetVariableStmt (VariableSetStmt *stmt, bool isTopLevel)
 
char * ExtractSetVariableArgs (VariableSetStmt *stmt)
 
void SetPGVariable (const char *name, List *args, bool is_local)
 
void GetPGVariable (const char *name, DestReceiver *dest)
 
TupleDesc GetPGVariableResultDesc (const char *name)
 
void GUC_check_errcode (int sqlerrcode)
 

Variables

PGDLLIMPORT bool Debug_print_plan
 
PGDLLIMPORT bool Debug_print_parse
 
PGDLLIMPORT bool Debug_print_raw_parse
 
PGDLLIMPORT bool Debug_print_rewritten
 
PGDLLIMPORT bool Debug_pretty_print
 
PGDLLIMPORT bool log_parser_stats
 
PGDLLIMPORT bool log_planner_stats
 
PGDLLIMPORT bool log_executor_stats
 
PGDLLIMPORT bool log_statement_stats
 
PGDLLIMPORT bool log_btree_build_stats
 
PGDLLIMPORT char * event_source
 
PGDLLIMPORT bool check_function_bodies
 
PGDLLIMPORT bool current_role_is_superuser
 
PGDLLIMPORT bool AllowAlterSystem
 
PGDLLIMPORT bool log_duration
 
PGDLLIMPORT int log_parameter_max_length
 
PGDLLIMPORT int log_parameter_max_length_on_error
 
PGDLLIMPORT int log_min_error_statement
 
PGDLLIMPORT int log_min_messages
 
PGDLLIMPORT int client_min_messages
 
PGDLLIMPORT int log_min_duration_sample
 
PGDLLIMPORT int log_min_duration_statement
 
PGDLLIMPORT int log_temp_files
 
PGDLLIMPORT double log_statement_sample_rate
 
PGDLLIMPORT double log_xact_sample_rate
 
PGDLLIMPORT char * backtrace_functions
 
PGDLLIMPORT int temp_file_limit
 
PGDLLIMPORT int num_temp_buffers
 
PGDLLIMPORT char * cluster_name
 
PGDLLIMPORT char * ConfigFileName
 
PGDLLIMPORT char * HbaFileName
 
PGDLLIMPORT char * IdentFileName
 
PGDLLIMPORT char * external_pid_file
 
PGDLLIMPORT char * application_name
 
PGDLLIMPORT int tcp_keepalives_idle
 
PGDLLIMPORT int tcp_keepalives_interval
 
PGDLLIMPORT int tcp_keepalives_count
 
PGDLLIMPORT int tcp_user_timeout
 
PGDLLIMPORT char * role_string
 
PGDLLIMPORT bool in_hot_standby_guc
 
PGDLLIMPORT bool trace_sort
 
PGDLLIMPORT const struct config_enum_entry archive_mode_options []
 
PGDLLIMPORT const struct config_enum_entry dynamic_shared_memory_options []
 
PGDLLIMPORT const struct config_enum_entry io_method_options []
 
PGDLLIMPORT const struct config_enum_entry recovery_target_action_options []
 
PGDLLIMPORT const struct config_enum_entry wal_level_options []
 
PGDLLIMPORT const struct config_enum_entry wal_sync_method_options []
 
PGDLLIMPORT char * GUC_check_errmsg_string
 
PGDLLIMPORT char * GUC_check_errdetail_string
 
PGDLLIMPORT char * GUC_check_errhint_string
 

Macro Definition Documentation

◆ EmitWarningsOnPlaceholders

#define EmitWarningsOnPlaceholders (   className)    MarkGUCPrefixReserved(className)

Definition at line 419 of file guc.h.

◆ GUC_ALLOW_IN_PARALLEL

#define GUC_ALLOW_IN_PARALLEL   0x008000 /* allow setting in parallel mode */

Definition at line 230 of file guc.h.

◆ GUC_check_errdetail

#define GUC_check_errdetail
Value:
pre_format_elog_string(errno, TEXTDOMAIN), \
GUC_check_errdetail_string = format_elog_string
format_elog_string
char * format_elog_string(const char *fmt,...)
Definition: elog.c:1671
pre_format_elog_string
void pre_format_elog_string(int errnumber, const char *domain)
Definition: elog.c:1662
TEXTDOMAIN
#define TEXTDOMAIN
Definition: elog.h:153

Definition at line 505 of file guc.h.

◆ GUC_check_errhint

#define GUC_check_errhint
Value:
pre_format_elog_string(errno, TEXTDOMAIN), \
GUC_check_errhint_string = format_elog_string

Definition at line 509 of file guc.h.

◆ GUC_check_errmsg

#define GUC_check_errmsg
Value:
pre_format_elog_string(errno, TEXTDOMAIN), \
GUC_check_errmsg_string = format_elog_string

Definition at line 501 of file guc.h.

◆ GUC_CUSTOM_PLACEHOLDER

#define GUC_CUSTOM_PLACEHOLDER   0x000200 /* placeholder for custom variable */

Definition at line 223 of file guc.h.

◆ GUC_DISALLOW_IN_AUTO_FILE

#define GUC_DISALLOW_IN_AUTO_FILE    0x002000 /* can't set in PG_AUTOCONF_FILENAME */

Definition at line 227 of file guc.h.

◆ GUC_DISALLOW_IN_FILE

#define GUC_DISALLOW_IN_FILE   0x000100 /* can't set in postgresql.conf */

Definition at line 222 of file guc.h.

◆ GUC_EXPLAIN

#define GUC_EXPLAIN   0x000020 /* include in EXPLAIN */

Definition at line 219 of file guc.h.

◆ GUC_IS_NAME

#define GUC_IS_NAME   0x000800 /* limit string to NAMEDATALEN-1 */

Definition at line 225 of file guc.h.

◆ GUC_LIST_INPUT

#define GUC_LIST_INPUT   0x000001 /* input can be list format */

Definition at line 214 of file guc.h.

◆ GUC_LIST_QUOTE

#define GUC_LIST_QUOTE   0x000002 /* double-quote list elements */

Definition at line 215 of file guc.h.

◆ GUC_NO_RESET

#define GUC_NO_RESET   0x000008 /* disallow RESET and SAVE */

Definition at line 217 of file guc.h.

◆ GUC_NO_RESET_ALL

#define GUC_NO_RESET_ALL   0x000010 /* exclude from RESET ALL */

Definition at line 218 of file guc.h.

◆ GUC_NO_SHOW_ALL

#define GUC_NO_SHOW_ALL   0x000004 /* exclude from SHOW ALL */

Definition at line 216 of file guc.h.

◆ GUC_NOT_IN_SAMPLE

#define GUC_NOT_IN_SAMPLE   0x000080 /* not in postgresql.conf.sample */

Definition at line 221 of file guc.h.

◆ GUC_NOT_WHILE_SEC_REST

#define GUC_NOT_WHILE_SEC_REST   0x001000 /* can't set if security restricted */

Definition at line 226 of file guc.h.

◆ GUC_QUALIFIER_SEPARATOR

#define GUC_QUALIFIER_SEPARATOR   '.'

Definition at line 208 of file guc.h.

◆ GUC_REPORT

#define GUC_REPORT   0x000040 /* auto-report changes to client */

Definition at line 220 of file guc.h.

◆ GUC_RUNTIME_COMPUTED

#define GUC_RUNTIME_COMPUTED   0x004000 /* delay processing in 'postgres -C' */

Definition at line 229 of file guc.h.

◆ GUC_SUPERUSER_ONLY

#define GUC_SUPERUSER_ONLY   0x000400 /* show only to superusers */

Definition at line 224 of file guc.h.

◆ GUC_UNIT

#define GUC_UNIT   (GUC_UNIT_MEMORY | GUC_UNIT_TIME)

Definition at line 244 of file guc.h.

◆ GUC_UNIT_BLOCKS

#define GUC_UNIT_BLOCKS   0x02000000 /* value is in blocks */

Definition at line 233 of file guc.h.

◆ GUC_UNIT_BYTE

#define GUC_UNIT_BYTE   0x05000000 /* value is in bytes */

Definition at line 236 of file guc.h.

◆ GUC_UNIT_KB

#define GUC_UNIT_KB   0x01000000 /* value is in kilobytes */

Definition at line 232 of file guc.h.

◆ GUC_UNIT_MB

#define GUC_UNIT_MB   0x04000000 /* value is in megabytes */

Definition at line 235 of file guc.h.

◆ GUC_UNIT_MEMORY

#define GUC_UNIT_MEMORY   0x0F000000 /* mask for size-related units */

Definition at line 237 of file guc.h.

◆ GUC_UNIT_MIN

#define GUC_UNIT_MIN   0x30000000 /* value is in minutes */

Definition at line 241 of file guc.h.

◆ GUC_UNIT_MS

#define GUC_UNIT_MS   0x10000000 /* value is in milliseconds */

Definition at line 239 of file guc.h.

◆ GUC_UNIT_S

#define GUC_UNIT_S   0x20000000 /* value is in seconds */

Definition at line 240 of file guc.h.

◆ GUC_UNIT_TIME

#define GUC_UNIT_TIME   0x70000000 /* mask for time-related units */

Definition at line 242 of file guc.h.

◆ GUC_UNIT_XBLOCKS

#define GUC_UNIT_XBLOCKS   0x03000000 /* value is in xlog blocks */

Definition at line 234 of file guc.h.

◆ MAX_KILOBYTES

#define MAX_KILOBYTES   (INT_MAX / 1024)

Definition at line 29 of file guc.h.

◆ PG_AUTOCONF_FILENAME

#define PG_AUTOCONF_FILENAME   "postgresql.auto.conf"

Definition at line 37 of file guc.h.

Typedef Documentation

◆ config_handle

typedef struct config_generic config_handle

Definition at line 151 of file guc.h.

◆ ConfigVariable

typedef struct ConfigVariable ConfigVariable

◆ GucBoolAssignHook

typedef void(* GucBoolAssignHook) (bool newval, void *extra)

Definition at line 189 of file guc.h.

◆ GucBoolCheckHook

typedef bool(* GucBoolCheckHook) (bool *newval, void **extra, GucSource source)

Definition at line 183 of file guc.h.

◆ GucEnumAssignHook

typedef void(* GucEnumAssignHook) (int newval, void *extra)

Definition at line 193 of file guc.h.

◆ GucEnumCheckHook

typedef bool(* GucEnumCheckHook) (int *newval, void **extra, GucSource source)

Definition at line 187 of file guc.h.

◆ GucIntAssignHook

typedef void(* GucIntAssignHook) (int newval, void *extra)

Definition at line 190 of file guc.h.

◆ GucIntCheckHook

typedef bool(* GucIntCheckHook) (int *newval, void **extra, GucSource source)

Definition at line 184 of file guc.h.

◆ GucRealAssignHook

typedef void(* GucRealAssignHook) (double newval, void *extra)

Definition at line 191 of file guc.h.

◆ GucRealCheckHook

typedef bool(* GucRealCheckHook) (double *newval, void **extra, GucSource source)

Definition at line 185 of file guc.h.

◆ GucShowHook

typedef const char *(* GucShowHook) (void)

Definition at line 195 of file guc.h.

◆ GucStringAssignHook

typedef void(* GucStringAssignHook) (const char *newval, void *extra)

Definition at line 192 of file guc.h.

◆ GucStringCheckHook

typedef bool(* GucStringCheckHook) (char **newval, void **extra, GucSource source)

Definition at line 186 of file guc.h.

Enumeration Type Documentation

◆ GucAction

enum GucAction
Enumerator
GUC_ACTION_SET 
GUC_ACTION_LOCAL 
GUC_ACTION_SAVE 

Definition at line 200 of file guc.h.

201{
202 /* Types of set_config_option actions */
203 GUC_ACTION_SET, /* regular SET command */
204 GUC_ACTION_LOCAL, /* SET LOCAL command */
205 GUC_ACTION_SAVE, /* function SET option, or temp assignment */
206} GucAction;
GucAction
GucAction
Definition: guc.h:201
GUC_ACTION_SAVE
@ GUC_ACTION_SAVE
Definition: guc.h:205
GUC_ACTION_SET
@ GUC_ACTION_SET
Definition: guc.h:203
GUC_ACTION_LOCAL
@ GUC_ACTION_LOCAL
Definition: guc.h:204

◆ GucContext

enum GucContext
Enumerator
PGC_INTERNAL 
PGC_POSTMASTER 
PGC_SIGHUP 
PGC_SU_BACKEND 
PGC_BACKEND 
PGC_SUSET 
PGC_USERSET 

Definition at line 71 of file guc.h.

72{
73 PGC_INTERNAL,
74 PGC_POSTMASTER,
75 PGC_SIGHUP,
76 PGC_SU_BACKEND,
77 PGC_BACKEND,
78 PGC_SUSET,
79 PGC_USERSET,
80} GucContext;
GucContext
GucContext
Definition: guc.h:72
PGC_SUSET
@ PGC_SUSET
Definition: guc.h:78
PGC_INTERNAL
@ PGC_INTERNAL
Definition: guc.h:73
PGC_USERSET
@ PGC_USERSET
Definition: guc.h:79
PGC_SU_BACKEND
@ PGC_SU_BACKEND
Definition: guc.h:76
PGC_POSTMASTER
@ PGC_POSTMASTER
Definition: guc.h:74
PGC_SIGHUP
@ PGC_SIGHUP
Definition: guc.h:75
PGC_BACKEND
@ PGC_BACKEND
Definition: guc.h:77

◆ GucSource

enum GucSource
Enumerator
PGC_S_DEFAULT 
PGC_S_DYNAMIC_DEFAULT 
PGC_S_ENV_VAR 
PGC_S_FILE 
PGC_S_ARGV 
PGC_S_GLOBAL 
PGC_S_DATABASE 
PGC_S_USER 
PGC_S_DATABASE_USER 
PGC_S_CLIENT 
PGC_S_OVERRIDE 
PGC_S_INTERACTIVE 
PGC_S_TEST 
PGC_S_SESSION 

Definition at line 111 of file guc.h.

112{
113 PGC_S_DEFAULT, /* hard-wired default ("boot_val") */
114 PGC_S_DYNAMIC_DEFAULT, /* default computed during initialization */
115 PGC_S_ENV_VAR, /* postmaster environment variable */
116 PGC_S_FILE, /* postgresql.conf */
117 PGC_S_ARGV, /* postmaster command line */
118 PGC_S_GLOBAL, /* global in-database setting */
119 PGC_S_DATABASE, /* per-database setting */
120 PGC_S_USER, /* per-user setting */
121 PGC_S_DATABASE_USER, /* per-user-and-database setting */
122 PGC_S_CLIENT, /* from client connection request */
123 PGC_S_OVERRIDE, /* special case to forcibly set default */
124 PGC_S_INTERACTIVE, /* dividing line for error reporting */
125 PGC_S_TEST, /* test per-database or per-user setting */
126 PGC_S_SESSION, /* SET command */
127} GucSource;
GucSource
GucSource
Definition: guc.h:112
PGC_S_DEFAULT
@ PGC_S_DEFAULT
Definition: guc.h:113
PGC_S_DYNAMIC_DEFAULT
@ PGC_S_DYNAMIC_DEFAULT
Definition: guc.h:114
PGC_S_FILE
@ PGC_S_FILE
Definition: guc.h:116
PGC_S_GLOBAL
@ PGC_S_GLOBAL
Definition: guc.h:118
PGC_S_DATABASE
@ PGC_S_DATABASE
Definition: guc.h:119
PGC_S_OVERRIDE
@ PGC_S_OVERRIDE
Definition: guc.h:123
PGC_S_ARGV
@ PGC_S_ARGV
Definition: guc.h:117
PGC_S_SESSION
@ PGC_S_SESSION
Definition: guc.h:126
PGC_S_CLIENT
@ PGC_S_CLIENT
Definition: guc.h:122
PGC_S_DATABASE_USER
@ PGC_S_DATABASE_USER
Definition: guc.h:121
PGC_S_ENV_VAR
@ PGC_S_ENV_VAR
Definition: guc.h:115
PGC_S_USER
@ PGC_S_USER
Definition: guc.h:120
PGC_S_TEST
@ PGC_S_TEST
Definition: guc.h:125
PGC_S_INTERACTIVE
@ PGC_S_INTERACTIVE
Definition: guc.h:124

Function Documentation

◆ AlterSystemSetConfigFile()

void AlterSystemSetConfigFile ( AlterSystemStmt *  altersysstmt)

Definition at line 4470 of file guc.c.

4471{
4472 char *name;
4473 char *value;
4474 bool resetall = false;
4475 ConfigVariable *head = NULL;
4476 ConfigVariable *tail = NULL;
4477 volatile int Tmpfd;
4478 char AutoConfFileName[MAXPGPATH];
4479 char AutoConfTmpFileName[MAXPGPATH];
4480
4481 /*
4482 * Extract statement arguments
4483 */
4484 name = altersysstmt->setstmt->name;
4485
4486 if (!AllowAlterSystem)
4487 ereport(ERROR,
4488 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
4489 errmsg("ALTER SYSTEM is not allowed in this environment")));
4490
4491 switch (altersysstmt->setstmt->kind)
4492 {
4493 case VAR_SET_VALUE:
4494 value = ExtractSetVariableArgs(altersysstmt->setstmt);
4495 break;
4496
4497 case VAR_SET_DEFAULT:
4498 case VAR_RESET:
4499 value = NULL;
4500 break;
4501
4502 case VAR_RESET_ALL:
4503 value = NULL;
4504 resetall = true;
4505 break;
4506
4507 default:
4508 elog(ERROR, "unrecognized alter system stmt type: %d",
4509 altersysstmt->setstmt->kind);
4510 break;
4511 }
4512
4513 /*
4514 * Check permission to run ALTER SYSTEM on the target variable
4515 */
4516 if (!superuser())
4517 {
4518 if (resetall)
4519 ereport(ERROR,
4520 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4521 errmsg("permission denied to perform ALTER SYSTEM RESET ALL")));
4522 else
4523 {
4524 AclResult aclresult;
4525
4526 aclresult = pg_parameter_aclcheck(name, GetUserId(),
4527 ACL_ALTER_SYSTEM);
4528 if (aclresult != ACLCHECK_OK)
4529 ereport(ERROR,
4530 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4531 errmsg("permission denied to set parameter \"%s\"",
4532 name)));
4533 }
4534 }
4535
4536 /*
4537 * Unless it's RESET_ALL, validate the target variable and value
4538 */
4539 if (!resetall)
4540 {
4541 struct config_generic *record;
4542
4543 /* We don't want to create a placeholder if there's not one already */
4544 record = find_option(name, false, true, DEBUG5);
4545 if (record != NULL)
4546 {
4547 /*
4548 * Don't allow parameters that can't be set in configuration files
4549 * to be set in PG_AUTOCONF_FILENAME file.
4550 */
4551 if ((record->context == PGC_INTERNAL) ||
4552 (record->flags & GUC_DISALLOW_IN_FILE) ||
4553 (record->flags & GUC_DISALLOW_IN_AUTO_FILE))
4554 ereport(ERROR,
4555 (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
4556 errmsg("parameter \"%s\" cannot be changed",
4557 name)));
4558
4559 /*
4560 * If a value is specified, verify that it's sane.
4561 */
4562 if (value)
4563 {
4564 union config_var_val newval;
4565 void *newextra = NULL;
4566
4567 if (!parse_and_validate_value(record, value,
4568 PGC_S_FILE, ERROR,
4569 &newval, &newextra))
4570 ereport(ERROR,
4571 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4572 errmsg("invalid value for parameter \"%s\": \"%s\"",
4573 name, value)));
4574
4575 if (record->vartype == PGC_STRING && newval.stringval != NULL)
4576 guc_free(newval.stringval);
4577 guc_free(newextra);
4578 }
4579 }
4580 else
4581 {
4582 /*
4583 * Variable not known; check we'd be allowed to create it. (We
4584 * cannot validate the value, but that's fine. A non-core GUC in
4585 * the config file cannot cause postmaster start to fail, so we
4586 * don't have to be too tense about possibly installing a bad
4587 * value.)
4588 *
4589 * As an exception, we skip this check if this is a RESET command
4590 * for an unknown custom GUC, else there'd be no way for users to
4591 * remove such settings with reserved prefixes.
4592 */
4593 if (value || !valid_custom_variable_name(name))
4594 (void) assignable_custom_variable_name(name, false, ERROR);
4595 }
4596
4597 /*
4598 * We must also reject values containing newlines, because the grammar
4599 * for config files doesn't support embedded newlines in string
4600 * literals.
4601 */
4602 if (value && strchr(value, '\n'))
4603 ereport(ERROR,
4604 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4605 errmsg("parameter value for ALTER SYSTEM must not contain a newline")));
4606 }
4607
4608 /*
4609 * PG_AUTOCONF_FILENAME and its corresponding temporary file are always in
4610 * the data directory, so we can reference them by simple relative paths.
4611 */
4612 snprintf(AutoConfFileName, sizeof(AutoConfFileName), "%s",
4613 PG_AUTOCONF_FILENAME);
4614 snprintf(AutoConfTmpFileName, sizeof(AutoConfTmpFileName), "%s.%s",
4615 AutoConfFileName,
4616 "tmp");
4617
4618 /*
4619 * Only one backend is allowed to operate on PG_AUTOCONF_FILENAME at a
4620 * time. Use AutoFileLock to ensure that. We must hold the lock while
4621 * reading the old file contents.
4622 */
4623 LWLockAcquire(AutoFileLock, LW_EXCLUSIVE);
4624
4625 /*
4626 * If we're going to reset everything, then no need to open or parse the
4627 * old file. We'll just write out an empty list.
4628 */
4629 if (!resetall)
4630 {
4631 struct stat st;
4632
4633 if (stat(AutoConfFileName, &st) == 0)
4634 {
4635 /* open old file PG_AUTOCONF_FILENAME */
4636 FILE *infile;
4637
4638 infile = AllocateFile(AutoConfFileName, "r");
4639 if (infile == NULL)
4640 ereport(ERROR,
4641 (errcode_for_file_access(),
4642 errmsg("could not open file \"%s\": %m",
4643 AutoConfFileName)));
4644
4645 /* parse it */
4646 if (!ParseConfigFp(infile, AutoConfFileName, CONF_FILE_START_DEPTH,
4647 LOG, &head, &tail))
4648 ereport(ERROR,
4649 (errcode(ERRCODE_CONFIG_FILE_ERROR),
4650 errmsg("could not parse contents of file \"%s\"",
4651 AutoConfFileName)));
4652
4653 FreeFile(infile);
4654 }
4655
4656 /*
4657 * Now, replace any existing entry with the new value, or add it if
4658 * not present.
4659 */
4660 replace_auto_config_value(&head, &tail, name, value);
4661 }
4662
4663 /*
4664 * Invoke the post-alter hook for setting this GUC variable. GUCs
4665 * typically do not have corresponding entries in pg_parameter_acl, so we
4666 * call the hook using the name rather than a potentially-non-existent
4667 * OID. Nonetheless, we pass ParameterAclRelationId so that this call
4668 * context can be distinguished from others. (Note that "name" will be
4669 * NULL in the RESET ALL case.)
4670 *
4671 * We do this here rather than at the end, because ALTER SYSTEM is not
4672 * transactional. If the hook aborts our transaction, it will be cleaner
4673 * to do so before we touch any files.
4674 */
4675 InvokeObjectPostAlterHookArgStr(ParameterAclRelationId, name,
4676 ACL_ALTER_SYSTEM,
4677 altersysstmt->setstmt->kind,
4678 false);
4679
4680 /*
4681 * To ensure crash safety, first write the new file data to a temp file,
4682 * then atomically rename it into place.
4683 *
4684 * If there is a temp file left over due to a previous crash, it's okay to
4685 * truncate and reuse it.
4686 */
4687 Tmpfd = BasicOpenFile(AutoConfTmpFileName,
4688 O_CREAT | O_RDWR | O_TRUNC);
4689 if (Tmpfd < 0)
4690 ereport(ERROR,
4691 (errcode_for_file_access(),
4692 errmsg("could not open file \"%s\": %m",
4693 AutoConfTmpFileName)));
4694
4695 /*
4696 * Use a TRY block to clean up the file if we fail. Since we need a TRY
4697 * block anyway, OK to use BasicOpenFile rather than OpenTransientFile.
4698 */
4699 PG_TRY();
4700 {
4701 /* Write and sync the new contents to the temporary file */
4702 write_auto_conf_file(Tmpfd, AutoConfTmpFileName, head);
4703
4704 /* Close before renaming; may be required on some platforms */
4705 close(Tmpfd);
4706 Tmpfd = -1;
4707
4708 /*
4709 * As the rename is atomic operation, if any problem occurs after this
4710 * at worst it can lose the parameters set by last ALTER SYSTEM
4711 * command.
4712 */
4713 durable_rename(AutoConfTmpFileName, AutoConfFileName, ERROR);
4714 }
4715 PG_CATCH();
4716 {
4717 /* Close file first, else unlink might fail on some platforms */
4718 if (Tmpfd >= 0)
4719 close(Tmpfd);
4720
4721 /* Unlink, but ignore any error */
4722 (void) unlink(AutoConfTmpFileName);
4723
4724 PG_RE_THROW();
4725 }
4726 PG_END_TRY();
4727
4728 FreeConfigVariables(head);
4729
4730 LWLockRelease(AutoFileLock);
4731}
AclResult
AclResult
Definition: acl.h:182
ACLCHECK_OK
@ ACLCHECK_OK
Definition: acl.h:183
pg_parameter_aclcheck
AclResult pg_parameter_aclcheck(const char *name, Oid roleid, AclMode mode)
Definition: aclchk.c:4062
CONF_FILE_START_DEPTH
#define CONF_FILE_START_DEPTH
Definition: conffiles.h:17
errcode_for_file_access
int errcode_for_file_access(void)
Definition: elog.c:886
errcode
int errcode(int sqlerrcode)
Definition: elog.c:863
errmsg
int errmsg(const char *fmt,...)
Definition: elog.c:1080
LOG
#define LOG
Definition: elog.h:31
PG_RE_THROW
#define PG_RE_THROW()
Definition: elog.h:405
PG_TRY
#define PG_TRY(...)
Definition: elog.h:372
PG_END_TRY
#define PG_END_TRY(...)
Definition: elog.h:397
ERROR
#define ERROR
Definition: elog.h:39
PG_CATCH
#define PG_CATCH(...)
Definition: elog.h:382
elog
#define elog(elevel,...)
Definition: elog.h:226
ereport
#define ereport(elevel,...)
Definition: elog.h:150
DEBUG5
#define DEBUG5
Definition: elog.h:26
durable_rename
int durable_rename(const char *oldfile, const char *newfile, int elevel)
Definition: fd.c:779
BasicOpenFile
int BasicOpenFile(const char *fileName, int fileFlags)
Definition: fd.c:1086
FreeFile
int FreeFile(FILE *file)
Definition: fd.c:2840
AllocateFile
FILE * AllocateFile(const char *name, const char *mode)
Definition: fd.c:2641
FreeConfigVariables
void FreeConfigVariables(ConfigVariable *list)
Definition: guc-file.l:617
ParseConfigFp
bool ParseConfigFp(FILE *fp, const char *config_file, int depth, int elevel, ConfigVariable **head_p, ConfigVariable **tail_p)
Definition: guc-file.l:350
assignable_custom_variable_name
static bool assignable_custom_variable_name(const char *name, bool skip_errors, int elevel)
Definition: guc.c:1001
guc_free
void guc_free(void *ptr)
Definition: guc.c:687
valid_custom_variable_name
static bool valid_custom_variable_name(const char *name)
Definition: guc.c:956
write_auto_conf_file
static void write_auto_conf_file(int fd, const char *filename, ConfigVariable *head)
Definition: guc.c:4333
newval
#define newval
find_option
struct config_generic * find_option(const char *name, bool create_placeholders, bool skip_errors, int elevel)
Definition: guc.c:1113
parse_and_validate_value
static bool parse_and_validate_value(const struct config_generic *record, const char *value, GucSource source, int elevel, union config_var_val *newval, void **newextra)
Definition: guc.c:2996
replace_auto_config_value
static void replace_auto_config_value(ConfigVariable **head_p, ConfigVariable **tail_p, const char *name, const char *value)
Definition: guc.c:4400
PG_AUTOCONF_FILENAME
#define PG_AUTOCONF_FILENAME
Definition: guc.h:37
GUC_DISALLOW_IN_FILE
#define GUC_DISALLOW_IN_FILE
Definition: guc.h:222
GUC_DISALLOW_IN_AUTO_FILE
#define GUC_DISALLOW_IN_AUTO_FILE
Definition: guc.h:227
ExtractSetVariableArgs
char * ExtractSetVariableArgs(VariableSetStmt *stmt)
Definition: guc_funcs.c:167
AllowAlterSystem
bool AllowAlterSystem
Definition: guc_tables.c:506
PGC_STRING
@ PGC_STRING
Definition: guc_tables.h:28
value
static struct @171 value
close
#define close(a)
Definition: win32.h:12
LWLockAcquire
bool LWLockAcquire(LWLock *lock, LWLockMode mode)
Definition: lwlock.c:1174
LWLockRelease
void LWLockRelease(LWLock *lock)
Definition: lwlock.c:1894
LW_EXCLUSIVE
@ LW_EXCLUSIVE
Definition: lwlock.h:112
GetUserId
Oid GetUserId(void)
Definition: miscinit.c:469
InvokeObjectPostAlterHookArgStr
#define InvokeObjectPostAlterHookArgStr(classId, objectName, subId, auxiliaryId, is_internal)
Definition: objectaccess.h:247
VAR_SET_DEFAULT
@ VAR_SET_DEFAULT
Definition: parsenodes.h:2695
VAR_RESET
@ VAR_RESET
Definition: parsenodes.h:2698
VAR_SET_VALUE
@ VAR_SET_VALUE
Definition: parsenodes.h:2694
VAR_RESET_ALL
@ VAR_RESET_ALL
Definition: parsenodes.h:2699
ACL_ALTER_SYSTEM
#define ACL_ALTER_SYSTEM
Definition: parsenodes.h:89
MAXPGPATH
#define MAXPGPATH
Definition: pg_config_manual.h:105
snprintf
#define snprintf
Definition: port.h:260
AlterSystemStmt::setstmt
VariableSetStmt * setstmt
Definition: parsenodes.h:3951
VariableSetStmt::kind
VariableSetKind kind
Definition: parsenodes.h:2707
config_generic
Definition: guc_tables.h:250
config_generic::context
GucContext context
Definition: guc_tables.h:253
config_generic::flags
int flags
Definition: guc_tables.h:257
config_generic::vartype
enum config_type vartype
Definition: guc_tables.h:258
superuser
bool superuser(void)
Definition: superuser.c:46
config_var_val
Definition: guc_tables.h:33
name
const char * name
Definition: wait_event_funcs.c:28
stat
#define stat
Definition: win32_port.h:274
infile
static void infile(const char *name)
Definition: zic.c:1257

References ACL_ALTER_SYSTEM, ACLCHECK_OK, AllocateFile(), AllowAlterSystem, assignable_custom_variable_name(), BasicOpenFile(), close, CONF_FILE_START_DEPTH, config_generic::context, DEBUG5, durable_rename(), elog, ereport, errcode(), errcode_for_file_access(), errmsg(), ERROR, ExtractSetVariableArgs(), find_option(), config_generic::flags, FreeConfigVariables(), FreeFile(), GetUserId(), GUC_DISALLOW_IN_AUTO_FILE, GUC_DISALLOW_IN_FILE, guc_free(), infile(), InvokeObjectPostAlterHookArgStr, VariableSetStmt::kind, LOG, LW_EXCLUSIVE, LWLockAcquire(), LWLockRelease(), MAXPGPATH, name, VariableSetStmt::name, newval, parse_and_validate_value(), ParseConfigFp(), PG_AUTOCONF_FILENAME, PG_CATCH, PG_END_TRY, pg_parameter_aclcheck(), PG_RE_THROW, PG_TRY, PGC_INTERNAL, PGC_S_FILE, PGC_STRING, replace_auto_config_value(), AlterSystemStmt::setstmt, snprintf, stat, superuser(), valid_custom_variable_name(), value, VAR_RESET, VAR_RESET_ALL, VAR_SET_DEFAULT, VAR_SET_VALUE, config_generic::vartype, and write_auto_conf_file().

Referenced by standard_ProcessUtility().

◆ AtEOXact_GUC()

void AtEOXact_GUC ( bool  isCommit,
int  nestLevel 
)

Definition at line 2137 of file guc.c.

2138{
2139 slist_mutable_iter iter;
2140
2141 /*
2142 * Note: it's possible to get here with GUCNestLevel == nestLevel-1 during
2143 * abort, if there is a failure during transaction start before
2144 * AtStart_GUC is called.
2145 */
2146 Assert(nestLevel > 0 &&
2147 (nestLevel <= GUCNestLevel ||
2148 (nestLevel == GUCNestLevel + 1 && !isCommit)));
2149
2150 /* We need only process GUCs having nonempty stacks */
2151 slist_foreach_modify(iter, &guc_stack_list)
2152 {
2153 struct config_generic *gconf = slist_container(struct config_generic,
2154 stack_link, iter.cur);
2155 GucStack *stack;
2156
2157 /*
2158 * Process and pop each stack entry within the nest level. To simplify
2159 * fmgr_security_definer() and other places that use GUC_ACTION_SAVE,
2160 * we allow failure exit from code that uses a local nest level to be
2161 * recovered at the surrounding transaction or subtransaction abort;
2162 * so there could be more than one stack entry to pop.
2163 */
2164 while ((stack = gconf->stack) != NULL &&
2165 stack->nest_level >= nestLevel)
2166 {
2167 GucStack *prev = stack->prev;
2168 bool restorePrior = false;
2169 bool restoreMasked = false;
2170 bool changed;
2171
2172 /*
2173 * In this next bit, if we don't set either restorePrior or
2174 * restoreMasked, we must "discard" any unwanted fields of the
2175 * stack entries to avoid leaking memory. If we do set one of
2176 * those flags, unused fields will be cleaned up after restoring.
2177 */
2178 if (!isCommit) /* if abort, always restore prior value */
2179 restorePrior = true;
2180 else if (stack->state == GUC_SAVE)
2181 restorePrior = true;
2182 else if (stack->nest_level == 1)
2183 {
2184 /* transaction commit */
2185 if (stack->state == GUC_SET_LOCAL)
2186 restoreMasked = true;
2187 else if (stack->state == GUC_SET)
2188 {
2189 /* we keep the current active value */
2190 discard_stack_value(gconf, &stack->prior);
2191 }
2192 else /* must be GUC_LOCAL */
2193 restorePrior = true;
2194 }
2195 else if (prev == NULL ||
2196 prev->nest_level < stack->nest_level - 1)
2197 {
2198 /* decrement entry's level and do not pop it */
2199 stack->nest_level--;
2200 continue;
2201 }
2202 else
2203 {
2204 /*
2205 * We have to merge this stack entry into prev. See README for
2206 * discussion of this bit.
2207 */
2208 switch (stack->state)
2209 {
2210 case GUC_SAVE:
2211 Assert(false); /* can't get here */
2212 break;
2213
2214 case GUC_SET:
2215 /* next level always becomes SET */
2216 discard_stack_value(gconf, &stack->prior);
2217 if (prev->state == GUC_SET_LOCAL)
2218 discard_stack_value(gconf, &prev->masked);
2219 prev->state = GUC_SET;
2220 break;
2221
2222 case GUC_LOCAL:
2223 if (prev->state == GUC_SET)
2224 {
2225 /* LOCAL migrates down */
2226 prev->masked_scontext = stack->scontext;
2227 prev->masked_srole = stack->srole;
2228 prev->masked = stack->prior;
2229 prev->state = GUC_SET_LOCAL;
2230 }
2231 else
2232 {
2233 /* else just forget this stack level */
2234 discard_stack_value(gconf, &stack->prior);
2235 }
2236 break;
2237
2238 case GUC_SET_LOCAL:
2239 /* prior state at this level no longer wanted */
2240 discard_stack_value(gconf, &stack->prior);
2241 /* copy down the masked state */
2242 prev->masked_scontext = stack->masked_scontext;
2243 prev->masked_srole = stack->masked_srole;
2244 if (prev->state == GUC_SET_LOCAL)
2245 discard_stack_value(gconf, &prev->masked);
2246 prev->masked = stack->masked;
2247 prev->state = GUC_SET_LOCAL;
2248 break;
2249 }
2250 }
2251
2252 changed = false;
2253
2254 if (restorePrior || restoreMasked)
2255 {
2256 /* Perform appropriate restoration of the stacked value */
2257 config_var_value newvalue;
2258 GucSource newsource;
2259 GucContext newscontext;
2260 Oid newsrole;
2261
2262 if (restoreMasked)
2263 {
2264 newvalue = stack->masked;
2265 newsource = PGC_S_SESSION;
2266 newscontext = stack->masked_scontext;
2267 newsrole = stack->masked_srole;
2268 }
2269 else
2270 {
2271 newvalue = stack->prior;
2272 newsource = stack->source;
2273 newscontext = stack->scontext;
2274 newsrole = stack->srole;
2275 }
2276
2277 switch (gconf->vartype)
2278 {
2279 case PGC_BOOL:
2280 {
2281 struct config_bool *conf = &gconf->_bool;
2282 bool newval = newvalue.val.boolval;
2283 void *newextra = newvalue.extra;
2284
2285 if (*conf->variable != newval ||
2286 gconf->extra != newextra)
2287 {
2288 if (conf->assign_hook)
2289 conf->assign_hook(newval, newextra);
2290 *conf->variable = newval;
2291 set_extra_field(gconf, &gconf->extra,
2292 newextra);
2293 changed = true;
2294 }
2295 break;
2296 }
2297 case PGC_INT:
2298 {
2299 struct config_int *conf = &gconf->_int;
2300 int newval = newvalue.val.intval;
2301 void *newextra = newvalue.extra;
2302
2303 if (*conf->variable != newval ||
2304 gconf->extra != newextra)
2305 {
2306 if (conf->assign_hook)
2307 conf->assign_hook(newval, newextra);
2308 *conf->variable = newval;
2309 set_extra_field(gconf, &gconf->extra,
2310 newextra);
2311 changed = true;
2312 }
2313 break;
2314 }
2315 case PGC_REAL:
2316 {
2317 struct config_real *conf = &gconf->_real;
2318 double newval = newvalue.val.realval;
2319 void *newextra = newvalue.extra;
2320
2321 if (*conf->variable != newval ||
2322 gconf->extra != newextra)
2323 {
2324 if (conf->assign_hook)
2325 conf->assign_hook(newval, newextra);
2326 *conf->variable = newval;
2327 set_extra_field(gconf, &gconf->extra,
2328 newextra);
2329 changed = true;
2330 }
2331 break;
2332 }
2333 case PGC_STRING:
2334 {
2335 struct config_string *conf = &gconf->_string;
2336 char *newval = newvalue.val.stringval;
2337 void *newextra = newvalue.extra;
2338
2339 if (*conf->variable != newval ||
2340 gconf->extra != newextra)
2341 {
2342 if (conf->assign_hook)
2343 conf->assign_hook(newval, newextra);
2344 set_string_field(gconf, conf->variable, newval);
2345 set_extra_field(gconf, &gconf->extra,
2346 newextra);
2347 changed = true;
2348 }
2349
2350 /*
2351 * Release stacked values if not used anymore. We
2352 * could use discard_stack_value() here, but since
2353 * we have type-specific code anyway, might as
2354 * well inline it.
2355 */
2356 set_string_field(gconf, &stack->prior.val.stringval, NULL);
2357 set_string_field(gconf, &stack->masked.val.stringval, NULL);
2358 break;
2359 }
2360 case PGC_ENUM:
2361 {
2362 struct config_enum *conf = &gconf->_enum;
2363 int newval = newvalue.val.enumval;
2364 void *newextra = newvalue.extra;
2365
2366 if (*conf->variable != newval ||
2367 gconf->extra != newextra)
2368 {
2369 if (conf->assign_hook)
2370 conf->assign_hook(newval, newextra);
2371 *conf->variable = newval;
2372 set_extra_field(gconf, &gconf->extra,
2373 newextra);
2374 changed = true;
2375 }
2376 break;
2377 }
2378 }
2379
2380 /*
2381 * Release stacked extra values if not used anymore.
2382 */
2383 set_extra_field(gconf, &(stack->prior.extra), NULL);
2384 set_extra_field(gconf, &(stack->masked.extra), NULL);
2385
2386 /* And restore source information */
2387 set_guc_source(gconf, newsource);
2388 gconf->scontext = newscontext;
2389 gconf->srole = newsrole;
2390 }
2391
2392 /*
2393 * Pop the GUC's state stack; if it's now empty, remove the GUC
2394 * from guc_stack_list.
2395 */
2396 gconf->stack = prev;
2397 if (prev == NULL)
2398 slist_delete_current(&iter);
2399 pfree(stack);
2400
2401 /* Report new value if we changed it */
2402 if (changed && (gconf->flags & GUC_REPORT) &&
2403 !(gconf->status & GUC_NEEDS_REPORT))
2404 {
2405 gconf->status |= GUC_NEEDS_REPORT;
2406 slist_push_head(&guc_report_list, &gconf->report_link);
2407 }
2408 } /* end of stack-popping loop */
2409 }
2410
2411 /* Update nesting level */
2412 GUCNestLevel = nestLevel - 1;
2413}
guc_report_list
static slist_head guc_report_list
Definition: guc.c:227
set_string_field
static void set_string_field(struct config_generic *conf, char **field, char *newval)
Definition: guc.c:727
GUCNestLevel
static int GUCNestLevel
Definition: guc.c:232
discard_stack_value
static void discard_stack_value(struct config_generic *gconf, config_var_value *val)
Definition: guc.c:813
guc_stack_list
static slist_head guc_stack_list
Definition: guc.c:225
set_guc_source
static void set_guc_source(struct config_generic *gconf, GucSource newsource)
Definition: guc.c:1986
set_extra_field
static void set_extra_field(struct config_generic *gconf, void **field, void *newval)
Definition: guc.c:765
GUC_REPORT
#define GUC_REPORT
Definition: guc.h:220
GUC_SET_LOCAL
@ GUC_SET_LOCAL
Definition: guc_tables.h:117
GUC_SET
@ GUC_SET
Definition: guc_tables.h:115
GUC_SAVE
@ GUC_SAVE
Definition: guc_tables.h:114
GUC_LOCAL
@ GUC_LOCAL
Definition: guc_tables.h:116
GUC_NEEDS_REPORT
#define GUC_NEEDS_REPORT
Definition: guc_tables.h:300
PGC_BOOL
@ PGC_BOOL
Definition: guc_tables.h:25
PGC_ENUM
@ PGC_ENUM
Definition: guc_tables.h:29
PGC_REAL
@ PGC_REAL
Definition: guc_tables.h:27
PGC_INT
@ PGC_INT
Definition: guc_tables.h:26
Assert
Assert(PointerIsAligned(start, uint64))
slist_delete_current
static void slist_delete_current(slist_mutable_iter *iter)
Definition: ilist.h:1084
slist_foreach_modify
#define slist_foreach_modify(iter, lhead)
Definition: ilist.h:1148
slist_push_head
static void slist_push_head(slist_head *head, slist_node *node)
Definition: ilist.h:1006
slist_container
#define slist_container(type, membername, ptr)
Definition: ilist.h:1106
pfree
void pfree(void *pointer)
Definition: mcxt.c:1594
Oid
unsigned int Oid
Definition: postgres_ext.h:32
config_bool
Definition: guc_tables.h:139
config_bool::variable
bool * variable
Definition: guc_tables.h:141
config_bool::assign_hook
GucBoolAssignHook assign_hook
Definition: guc_tables.h:144
config_enum
Definition: guc_tables.h:201
config_enum::variable
int * variable
Definition: guc_tables.h:203
config_enum::assign_hook
GucEnumAssignHook assign_hook
Definition: guc_tables.h:207
config_generic::_bool
struct config_bool _bool
Definition: guc_tables.h:285
config_generic::status
int status
Definition: guc_tables.h:260
config_generic::scontext
GucContext scontext
Definition: guc_tables.h:263
config_generic::_string
struct config_string _string
Definition: guc_tables.h:288
config_generic::_real
struct config_real _real
Definition: guc_tables.h:287
config_generic::stack_link
slist_node stack_link
Definition: guc_tables.h:272
config_generic::srole
Oid srole
Definition: guc_tables.h:265
config_generic::_int
struct config_int _int
Definition: guc_tables.h:286
config_generic::stack
GucStack * stack
Definition: guc_tables.h:267
config_generic::extra
void * extra
Definition: guc_tables.h:268
config_generic::report_link
slist_node report_link
Definition: guc_tables.h:274
config_generic::_enum
struct config_enum _enum
Definition: guc_tables.h:289
config_int
Definition: guc_tables.h:151
config_int::assign_hook
GucIntAssignHook assign_hook
Definition: guc_tables.h:158
config_int::variable
int * variable
Definition: guc_tables.h:153
config_real
Definition: guc_tables.h:165
config_real::assign_hook
GucRealAssignHook assign_hook
Definition: guc_tables.h:172
config_real::variable
double * variable
Definition: guc_tables.h:167
config_string
Definition: guc_tables.h:189
config_string::assign_hook
GucStringAssignHook assign_hook
Definition: guc_tables.h:194
config_string::variable
char ** variable
Definition: guc_tables.h:191
config_var_value
Definition: guc_tables.h:46
config_var_value::val
union config_var_val val
Definition: guc_tables.h:47
config_var_value::extra
void * extra
Definition: guc_tables.h:48
guc_stack
Definition: guc_tables.h:121
guc_stack::prev
struct guc_stack * prev
Definition: guc_tables.h:122
guc_stack::masked_srole
Oid masked_srole
Definition: guc_tables.h:130
guc_stack::nest_level
int nest_level
Definition: guc_tables.h:123
guc_stack::masked
config_var_value masked
Definition: guc_tables.h:132
guc_stack::prior
config_var_value prior
Definition: guc_tables.h:131
guc_stack::srole
Oid srole
Definition: guc_tables.h:129
guc_stack::scontext
GucContext scontext
Definition: guc_tables.h:127
guc_stack::state
GucStackState state
Definition: guc_tables.h:124
guc_stack::source
GucSource source
Definition: guc_tables.h:125
guc_stack::masked_scontext
GucContext masked_scontext
Definition: guc_tables.h:128
slist_mutable_iter
Definition: ilist.h:273
slist_mutable_iter::cur
slist_node * cur
Definition: ilist.h:274
config_var_val::boolval
bool boolval
Definition: guc_tables.h:34
config_var_val::realval
double realval
Definition: guc_tables.h:36
config_var_val::stringval
char * stringval
Definition: guc_tables.h:37
config_var_val::intval
int intval
Definition: guc_tables.h:35
config_var_val::enumval
int enumval
Definition: guc_tables.h:38

References config_generic::_bool, config_generic::_enum, config_generic::_int, config_generic::_real, config_generic::_string, Assert(), config_bool::assign_hook, config_int::assign_hook, config_real::assign_hook, config_string::assign_hook, config_enum::assign_hook, config_var_val::boolval, slist_mutable_iter::cur, discard_stack_value(), config_var_val::enumval, config_var_value::extra, config_generic::extra, config_generic::flags, GUC_LOCAL, GUC_NEEDS_REPORT, GUC_REPORT, guc_report_list, GUC_SAVE, GUC_SET, GUC_SET_LOCAL, guc_stack_list, GUCNestLevel, config_var_val::intval, guc_stack::masked, guc_stack::masked_scontext, guc_stack::masked_srole, guc_stack::nest_level, newval, pfree(), PGC_BOOL, PGC_ENUM, PGC_INT, PGC_REAL, PGC_S_SESSION, PGC_STRING, guc_stack::prev, guc_stack::prior, config_var_val::realval, config_generic::report_link, guc_stack::scontext, config_generic::scontext, set_extra_field(), set_guc_source(), set_string_field(), slist_container, slist_delete_current(), slist_foreach_modify, slist_push_head(), guc_stack::source, guc_stack::srole, config_generic::srole, config_generic::stack, config_generic::stack_link, guc_stack::state, config_generic::status, config_var_val::stringval, config_var_value::val, config_bool::variable, config_int::variable, config_real::variable, config_string::variable, config_enum::variable, and config_generic::vartype.

Referenced by AbortSubTransaction(), AbortTransaction(), amcheck_lock_relation_and_check(), brin_summarize_range(), cluster_rel(), CommitSubTransaction(), CommitTransaction(), ComputeIndexAttrs(), CreateSchemaCommand(), DefineIndex(), do_analyze_rel(), execute_extension_script(), fmgr_security_definer(), index_build(), index_concurrently_build(), PrepareTransaction(), ProcedureCreate(), RefreshMatViewByOid(), reindex_index(), ReindexRelationConcurrently(), reset_transmission_modes(), restoreLocalGucs(), RestoreUserContext(), RI_Initial_Check(), RI_PartitionRemove_Check(), vacuum_rel(), and validate_index().

◆ AtStart_GUC()

void AtStart_GUC ( void  )

Definition at line 2090 of file guc.c.

2091{
2092 /*
2093 * The nest level should be 0 between transactions; if it isn't, somebody
2094 * didn't call AtEOXact_GUC, or called it with the wrong nestLevel. We
2095 * throw a warning but make no other effort to clean up.
2096 */
2097 if (GUCNestLevel != 0)
2098 elog(WARNING, "GUC nest level = %d at transaction start",
2099 GUCNestLevel);
2100 GUCNestLevel = 1;
2101}
WARNING
#define WARNING
Definition: elog.h:36

References elog, GUCNestLevel, and WARNING.

Referenced by StartTransaction().

◆ BeginReportingGUCOptions()

void BeginReportingGUCOptions ( void  )

Definition at line 2421 of file guc.c.

2422{
2423 HASH_SEQ_STATUS status;
2424 GUCHashEntry *hentry;
2425
2426 /*
2427 * Don't do anything unless talking to an interactive frontend.
2428 */
2429 if (whereToSendOutput != DestRemote)
2430 return;
2431
2432 reporting_enabled = true;
2433
2434 /*
2435 * Hack for in_hot_standby: set the GUC value true if appropriate. This
2436 * is kind of an ugly place to do it, but there's few better options.
2437 *
2438 * (This could be out of date by the time we actually send it, in which
2439 * case the next ReportChangedGUCOptions call will send a duplicate
2440 * report.)
2441 */
2442 if (RecoveryInProgress())
2443 SetConfigOption("in_hot_standby", "true",
2444 PGC_INTERNAL, PGC_S_OVERRIDE);
2445
2446 /* Transmit initial values of interesting variables */
2447 hash_seq_init(&status, guc_hashtab);
2448 while ((hentry = (GUCHashEntry *) hash_seq_search(&status)) != NULL)
2449 {
2450 struct config_generic *conf = hentry->gucvar;
2451
2452 if (conf->flags & GUC_REPORT)
2453 ReportGUCOption(conf);
2454 }
2455}
DestRemote
@ DestRemote
Definition: dest.h:89
hash_seq_search
void * hash_seq_search(HASH_SEQ_STATUS *status)
Definition: dynahash.c:1415
hash_seq_init
void hash_seq_init(HASH_SEQ_STATUS *status, HTAB *hashp)
Definition: dynahash.c:1380
ReportGUCOption
static void ReportGUCOption(struct config_generic *record)
Definition: guc.c:2509
SetConfigOption
void SetConfigOption(const char *name, const char *value, GucContext context, GucSource source)
Definition: guc.c:4196
guc_hashtab
static HTAB * guc_hashtab
Definition: guc.c:213
reporting_enabled
static bool reporting_enabled
Definition: guc.c:230
whereToSendOutput
CommandDest whereToSendOutput
Definition: postgres.c:92
GUCHashEntry::gucvar
struct config_generic * gucvar
Definition: guc.c:210
HASH_SEQ_STATUS
Definition: hsearch.h:121
RecoveryInProgress
bool RecoveryInProgress(void)
Definition: xlog.c:6406

References DestRemote, config_generic::flags, guc_hashtab, GUC_REPORT, GUCHashEntry::gucvar, hash_seq_init(), hash_seq_search(), PGC_INTERNAL, PGC_S_OVERRIDE, RecoveryInProgress(), ReportGUCOption(), reporting_enabled, SetConfigOption(), and whereToSendOutput.

Referenced by PostgresMain().

◆ check_GUC_name_for_parameter_acl()

void check_GUC_name_for_parameter_acl ( const char *  name)

Definition at line 1287 of file guc.c.

1288{
1289 /* OK if the GUC exists. */
1290 if (find_option(name, false, true, DEBUG5) != NULL)
1291 return;
1292 /* Otherwise, it'd better be a valid custom GUC name. */
1293 (void) assignable_custom_variable_name(name, false, ERROR);
1294}

References assignable_custom_variable_name(), DEBUG5, ERROR, find_option(), and name.

Referenced by ParameterAclCreate().

◆ convert_GUC_name_for_parameter_acl()

char * convert_GUC_name_for_parameter_acl ( const char *  name)

Definition at line 1251 of file guc.c.

1252{
1253 char *result;
1254
1255 /* Apply old-GUC-name mapping. */
1256 for (int i = 0; map_old_guc_names[i] != NULL; i += 2)
1257 {
1258 if (guc_name_compare(name, map_old_guc_names[i]) == 0)
1259 {
1260 name = map_old_guc_names[i + 1];
1261 break;
1262 }
1263 }
1264
1265 /* Apply case-folding that matches guc_name_compare(). */
1266 result = pstrdup(name);
1267 for (char *ptr = result; *ptr != '\0'; ptr++)
1268 {
1269 char ch = *ptr;
1270
1271 if (ch >= 'A' && ch <= 'Z')
1272 {
1273 ch += 'a' - 'A';
1274 *ptr = ch;
1275 }
1276 }
1277
1278 return result;
1279}
map_old_guc_names
static const char *const map_old_guc_names[]
Definition: guc.c:191
guc_name_compare
int guc_name_compare(const char *namea, const char *nameb)
Definition: guc.c:1177
i
int i
Definition: isn.c:77
pstrdup
char * pstrdup(const char *in)
Definition: mcxt.c:1759

References guc_name_compare(), i, map_old_guc_names, name, and pstrdup().

Referenced by ParameterAclCreate(), ParameterAclLookup(), and pg_parameter_aclmask().

◆ DeescapeQuotedString()

char * DeescapeQuotedString ( const char *  s)

Definition at line 661 of file guc-file.l.

662{
663 char *newStr;
664 int len,
665 i,
666 j;
667
668 /* We just Assert that there are leading and trailing quotes */
669 Assert(s != NULL && s[0] == '\'');
670 len = strlen(s);
671 Assert(len >= 2);
672 Assert(s[len - 1] == '\'');
673
674 /* Skip the leading quote; we'll handle the trailing quote below */
675 s++, len--;
676
677 /* Since len still includes trailing quote, this is enough space */
678 newStr = palloc(len);
679
680 for (i = 0, j = 0; i < len; i++)
681 {
682 if (s[i] == '\\')
683 {
684 i++;
685 switch (s[i])
686 {
687 case 'b':
688 newStr[j] = '\b';
689 break;
690 case 'f':
691 newStr[j] = '\f';
692 break;
693 case 'n':
694 newStr[j] = '\n';
695 break;
696 case 'r':
697 newStr[j] = '\r';
698 break;
699 case 't':
700 newStr[j] = '\t';
701 break;
702 case '0':
703 case '1':
704 case '2':
705 case '3':
706 case '4':
707 case '5':
708 case '6':
709 case '7':
710 {
711 int k;
712 long octVal = 0;
713
714 for (k = 0;
715 s[i + k] >= '0' && s[i + k] <= '7' && k < 3;
716 k++)
717 octVal = (octVal << 3) + (s[i + k] - '0');
718 i += k - 1;
719 newStr[j] = ((char) octVal);
720 }
721 break;
722 default:
723 newStr[j] = s[i];
724 break;
725 } /* switch */
726 }
727 else if (s[i] == '\'' && s[i + 1] == '\'')
728 {
729 /* doubled quote becomes just one quote */
730 newStr[j] = s[++i];
731 }
732 else
733 newStr[j] = s[i];
734 j++;
735 }
736
737 /* We copied the ending quote to newStr, so replace with \0 */
738 Assert(j > 0 && j <= len);
739 newStr[--j] = '\0';
740
741 return newStr;
742}
j
int j
Definition: isn.c:78
palloc
void * palloc(Size size)
Definition: mcxt.c:1365
len
const void size_t len
Definition: pg_crc32c_sse42.c:28

References Assert(), i, j, len, and palloc().

Referenced by ParseConfigFp().

◆ DefineCustomBoolVariable()

void DefineCustomBoolVariable ( const char *  name,
const char *  short_desc,
const char *  long_desc,
bool *  valueAddr,
bool  bootValue,
GucContext  context,
int  flags,
GucBoolCheckHook  check_hook,
GucBoolAssignHook  assign_hook,
GucShowHook  show_hook 
)

◆ DefineCustomEnumVariable()

void void void void void DefineCustomEnumVariable ( const char *  name,
const char *  short_desc,
const char *  long_desc,
int *  valueAddr,
int  bootValue,
const struct config_enum_entry *  options,
GucContext  context,
int  flags,
GucEnumCheckHook  check_hook,
GucEnumAssignHook  assign_hook,
GucShowHook  show_hook 
)

◆ DefineCustomIntVariable()

void void DefineCustomIntVariable ( const char *  name,
const char *  short_desc,
const char *  long_desc,
int *  valueAddr,
int  bootValue,
int  minValue,
int  maxValue,
GucContext  context,
int  flags,
GucIntCheckHook  check_hook,
GucIntAssignHook  assign_hook,
GucShowHook  show_hook 
)

◆ DefineCustomRealVariable()

void void void DefineCustomRealVariable ( const char *  name,
const char *  short_desc,
const char *  long_desc,
double *  valueAddr,
double  bootValue,
double  minValue,
double  maxValue,
GucContext  context,
int  flags,
GucRealCheckHook  check_hook,
GucRealAssignHook  assign_hook,
GucShowHook  show_hook 
)

◆ DefineCustomStringVariable()

void void void void DefineCustomStringVariable ( const char *  name,
const char *  short_desc,
const char *  long_desc,
char **  valueAddr,
const char *  bootValue,
GucContext  context,
int  flags,
GucStringCheckHook  check_hook,
GucStringAssignHook  assign_hook,
GucShowHook  show_hook 
)

◆ EstimateGUCStateSpace()

Size EstimateGUCStateSpace ( void  )

Definition at line 5817 of file guc.c.

5818{
5819 Size size;
5820 dlist_iter iter;
5821
5822 /* Add space reqd for saving the data size of the guc state */
5823 size = sizeof(Size);
5824
5825 /*
5826 * Add up the space needed for each GUC variable.
5827 *
5828 * We need only process non-default GUCs.
5829 */
5830 dlist_foreach(iter, &guc_nondef_list)
5831 {
5832 struct config_generic *gconf = dlist_container(struct config_generic,
5833 nondef_link, iter.cur);
5834
5835 size = add_size(size, estimate_variable_size(gconf));
5836 }
5837
5838 return size;
5839}
Size
size_t Size
Definition: c.h:613
guc_nondef_list
static dlist_head guc_nondef_list
Definition: guc.c:223
estimate_variable_size
static Size estimate_variable_size(struct config_generic *gconf)
Definition: guc.c:5717
dlist_foreach
#define dlist_foreach(iter, lhead)
Definition: ilist.h:623
dlist_container
#define dlist_container(type, membername, ptr)
Definition: ilist.h:593
add_size
Size add_size(Size s1, Size s2)
Definition: shmem.c:495
config_generic::nondef_link
dlist_node nondef_link
Definition: guc_tables.h:270
dlist_iter
Definition: ilist.h:178
dlist_iter::cur
dlist_node * cur
Definition: ilist.h:179

References add_size(), dlist_iter::cur, dlist_container, dlist_foreach, estimate_variable_size(), guc_nondef_list, and config_generic::nondef_link.

Referenced by InitializeParallelDSM().

◆ ExecSetVariableStmt()

void ExecSetVariableStmt ( VariableSetStmt *  stmt,
bool  isTopLevel 
)

Definition at line 43 of file guc_funcs.c.

44{
45 GucAction action = stmt->is_local ? GUC_ACTION_LOCAL : GUC_ACTION_SET;
46
47 /*
48 * Workers synchronize these parameters at the start of the parallel
49 * operation; then, we block SET during the operation.
50 */
51 if (IsInParallelMode())
52 ereport(ERROR,
53 (errcode(ERRCODE_INVALID_TRANSACTION_STATE),
54 errmsg("cannot set parameters during a parallel operation")));
55
56 switch (stmt->kind)
57 {
58 case VAR_SET_VALUE:
59 case VAR_SET_CURRENT:
60 if (stmt->is_local)
61 WarnNoTransactionBlock(isTopLevel, "SET LOCAL");
62 (void) set_config_option(stmt->name,
63 ExtractSetVariableArgs(stmt),
64 (superuser() ? PGC_SUSET : PGC_USERSET),
65 PGC_S_SESSION,
66 action, true, 0, false);
67 break;
68 case VAR_SET_MULTI:
69
70 /*
71 * Special-case SQL syntaxes. The TRANSACTION and SESSION
72 * CHARACTERISTICS cases effectively set more than one variable
73 * per statement. TRANSACTION SNAPSHOT only takes one argument,
74 * but we put it here anyway since it's a special case and not
75 * related to any GUC variable.
76 */
77 if (strcmp(stmt->name, "TRANSACTION") == 0)
78 {
79 ListCell *head;
80
81 WarnNoTransactionBlock(isTopLevel, "SET TRANSACTION");
82
83 foreach(head, stmt->args)
84 {
85 DefElem *item = (DefElem *) lfirst(head);
86
87 if (strcmp(item->defname, "transaction_isolation") == 0)
88 SetPGVariable("transaction_isolation",
89 list_make1(item->arg), stmt->is_local);
90 else if (strcmp(item->defname, "transaction_read_only") == 0)
91 SetPGVariable("transaction_read_only",
92 list_make1(item->arg), stmt->is_local);
93 else if (strcmp(item->defname, "transaction_deferrable") == 0)
94 SetPGVariable("transaction_deferrable",
95 list_make1(item->arg), stmt->is_local);
96 else
97 elog(ERROR, "unexpected SET TRANSACTION element: %s",
98 item->defname);
99 }
100 }
101 else if (strcmp(stmt->name, "SESSION CHARACTERISTICS") == 0)
102 {
103 ListCell *head;
104
105 foreach(head, stmt->args)
106 {
107 DefElem *item = (DefElem *) lfirst(head);
108
109 if (strcmp(item->defname, "transaction_isolation") == 0)
110 SetPGVariable("default_transaction_isolation",
111 list_make1(item->arg), stmt->is_local);
112 else if (strcmp(item->defname, "transaction_read_only") == 0)
113 SetPGVariable("default_transaction_read_only",
114 list_make1(item->arg), stmt->is_local);
115 else if (strcmp(item->defname, "transaction_deferrable") == 0)
116 SetPGVariable("default_transaction_deferrable",
117 list_make1(item->arg), stmt->is_local);
118 else
119 elog(ERROR, "unexpected SET SESSION element: %s",
120 item->defname);
121 }
122 }
123 else if (strcmp(stmt->name, "TRANSACTION SNAPSHOT") == 0)
124 {
125 A_Const *con = linitial_node(A_Const, stmt->args);
126
127 if (stmt->is_local)
128 ereport(ERROR,
129 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
130 errmsg("SET LOCAL TRANSACTION SNAPSHOT is not implemented")));
131
132 WarnNoTransactionBlock(isTopLevel, "SET TRANSACTION");
133 ImportSnapshot(strVal(&con->val));
134 }
135 else
136 elog(ERROR, "unexpected SET MULTI element: %s",
137 stmt->name);
138 break;
139 case VAR_SET_DEFAULT:
140 if (stmt->is_local)
141 WarnNoTransactionBlock(isTopLevel, "SET LOCAL");
142 /* fall through */
143 case VAR_RESET:
144 (void) set_config_option(stmt->name,
145 NULL,
146 (superuser() ? PGC_SUSET : PGC_USERSET),
147 PGC_S_SESSION,
148 action, true, 0, false);
149 break;
150 case VAR_RESET_ALL:
151 ResetAllOptions();
152 break;
153 }
154
155 /* Invoke the post-alter hook for setting this GUC variable, by name. */
156 InvokeObjectPostAlterHookArgStr(ParameterAclRelationId, stmt->name,
157 ACL_SET, stmt->kind, false);
158}
ResetAllOptions
void ResetAllOptions(void)
Definition: guc.c:1878
set_config_option
int set_config_option(const char *name, const char *value, GucContext context, GucSource source, GucAction action, bool changeVal, int elevel, bool is_reload)
Definition: guc.c:3216
SetPGVariable
void SetPGVariable(const char *name, List *args, bool is_local)
Definition: guc_funcs.c:341
stmt
#define stmt
Definition: indent_codes.h:59
generate_unaccent_rules.action
action
Definition: generate_unaccent_rules.py:287
ACL_SET
#define ACL_SET
Definition: parsenodes.h:88
VAR_SET_MULTI
@ VAR_SET_MULTI
Definition: parsenodes.h:2697
VAR_SET_CURRENT
@ VAR_SET_CURRENT
Definition: parsenodes.h:2696
lfirst
#define lfirst(lc)
Definition: pg_list.h:172
linitial_node
#define linitial_node(type, l)
Definition: pg_list.h:181
list_make1
#define list_make1(x1)
Definition: pg_list.h:212
ImportSnapshot
void ImportSnapshot(const char *idstr)
Definition: snapmgr.c:1387
A_Const
Definition: parsenodes.h:383
A_Const::val
union ValUnion val
Definition: parsenodes.h:387
DefElem::defname
char * defname
Definition: parsenodes.h:843
DefElem::arg
Node * arg
Definition: parsenodes.h:844
strVal
#define strVal(v)
Definition: value.h:82
WarnNoTransactionBlock
void WarnNoTransactionBlock(bool isTopLevel, const char *stmtType)
Definition: xact.c:3728
IsInParallelMode
bool IsInParallelMode(void)
Definition: xact.c:1090

References ACL_SET, generate_unaccent_rules::action, DefElem::arg, DefElem::defname, elog, ereport, errcode(), errmsg(), ERROR, ExtractSetVariableArgs(), GUC_ACTION_LOCAL, GUC_ACTION_SET, ImportSnapshot(), InvokeObjectPostAlterHookArgStr, IsInParallelMode(), lfirst, linitial_node, list_make1, PGC_S_SESSION, PGC_SUSET, PGC_USERSET, ResetAllOptions(), set_config_option(), SetPGVariable(), stmt, strVal, superuser(), A_Const::val, VAR_RESET, VAR_RESET_ALL, VAR_SET_CURRENT, VAR_SET_DEFAULT, VAR_SET_MULTI, VAR_SET_VALUE, and WarnNoTransactionBlock().

Referenced by standard_ProcessUtility().

◆ ExtractSetVariableArgs()

char * ExtractSetVariableArgs ( VariableSetStmt *  stmt)

Definition at line 167 of file guc_funcs.c.

168{
169 switch (stmt->kind)
170 {
171 case VAR_SET_VALUE:
172 return flatten_set_variable_args(stmt->name, stmt->args);
173 case VAR_SET_CURRENT:
174 return GetConfigOptionByName(stmt->name, NULL, false);
175 default:
176 return NULL;
177 }
178}
GetConfigOptionByName
char * GetConfigOptionByName(const char *name, const char **varname, bool missing_ok)
Definition: guc.c:5301
flatten_set_variable_args
static char * flatten_set_variable_args(const char *name, List *args)
Definition: guc_funcs.c:192

References flatten_set_variable_args(), GetConfigOptionByName(), stmt, VAR_SET_CURRENT, and VAR_SET_VALUE.

Referenced by AlterSetting(), AlterSystemSetConfigFile(), ExecSetVariableStmt(), and update_proconfig_value().

◆ FreeConfigVariables()

void FreeConfigVariables ( ConfigVariable *  list)

Definition at line 617 of file guc-file.l.

618{
619 ConfigVariable *item;
620
621 item = list;
622 while (item)
623 {
624 ConfigVariable *next = item->next;
625
626 FreeConfigVariable(item);
627 item = next;
628 }
629}
next
static int32 next
Definition: blutils.c:224
FreeConfigVariable
static void FreeConfigVariable(ConfigVariable *item)
Definition: guc-file.l:635
ConfigVariable::next
struct ConfigVariable * next
Definition: guc.h:148

References FreeConfigVariable(), sort-test::list, next, and ConfigVariable::next.

Referenced by AlterSystemSetConfigFile(), and parse_extension_control_file().

◆ get_config_handle()

config_handle * get_config_handle ( const char *  name)

Definition at line 4148 of file guc.c.

4149{
4150 struct config_generic *gen = find_option(name, false, false, 0);
4151
4152 if (gen && ((gen->flags & GUC_CUSTOM_PLACEHOLDER) == 0))
4153 return gen;
4154
4155 return NULL;
4156}
GUC_CUSTOM_PLACEHOLDER
#define GUC_CUSTOM_PLACEHOLDER
Definition: guc.h:223

References find_option(), config_generic::flags, GUC_CUSTOM_PLACEHOLDER, and name.

Referenced by fmgr_security_definer().

◆ get_config_unit_name()

const char * get_config_unit_name ( int  flags)

Definition at line 2686 of file guc.c.

2687{
2688 switch (flags & GUC_UNIT)
2689 {
2690 case 0:
2691 return NULL; /* GUC has no units */
2692 case GUC_UNIT_BYTE:
2693 return "B";
2694 case GUC_UNIT_KB:
2695 return "kB";
2696 case GUC_UNIT_MB:
2697 return "MB";
2698 case GUC_UNIT_BLOCKS:
2699 {
2700 static char bbuf[8];
2701
2702 /* initialize if first time through */
2703 if (bbuf[0] == '\0')
2704 snprintf(bbuf, sizeof(bbuf), "%dkB", BLCKSZ / 1024);
2705 return bbuf;
2706 }
2707 case GUC_UNIT_XBLOCKS:
2708 {
2709 static char xbuf[8];
2710
2711 /* initialize if first time through */
2712 if (xbuf[0] == '\0')
2713 snprintf(xbuf, sizeof(xbuf), "%dkB", XLOG_BLCKSZ / 1024);
2714 return xbuf;
2715 }
2716 case GUC_UNIT_MS:
2717 return "ms";
2718 case GUC_UNIT_S:
2719 return "s";
2720 case GUC_UNIT_MIN:
2721 return "min";
2722 default:
2723 elog(ERROR, "unrecognized GUC units value: %d",
2724 flags & GUC_UNIT);
2725 return NULL;
2726 }
2727}
GUC_UNIT_MB
#define GUC_UNIT_MB
Definition: guc.h:235
GUC_UNIT
#define GUC_UNIT
Definition: guc.h:244
GUC_UNIT_MS
#define GUC_UNIT_MS
Definition: guc.h:239
GUC_UNIT_BLOCKS
#define GUC_UNIT_BLOCKS
Definition: guc.h:233
GUC_UNIT_XBLOCKS
#define GUC_UNIT_XBLOCKS
Definition: guc.h:234
GUC_UNIT_BYTE
#define GUC_UNIT_BYTE
Definition: guc.h:236
GUC_UNIT_S
#define GUC_UNIT_S
Definition: guc.h:240
GUC_UNIT_KB
#define GUC_UNIT_KB
Definition: guc.h:232
GUC_UNIT_MIN
#define GUC_UNIT_MIN
Definition: guc.h:241

References elog, ERROR, config_generic::flags, GUC_UNIT, GUC_UNIT_BLOCKS, GUC_UNIT_BYTE, GUC_UNIT_KB, GUC_UNIT_MB, GUC_UNIT_MIN, GUC_UNIT_MS, GUC_UNIT_S, GUC_UNIT_XBLOCKS, and snprintf.

Referenced by GetConfigOptionValues(), and parse_and_validate_value().

◆ GetConfigOption()

const char * GetConfigOption ( const char *  name,
bool  missing_ok,
bool  restrict_privileged 
)

Definition at line 4219 of file guc.c.

4220{
4221 struct config_generic *record;
4222 static char buffer[256];
4223
4224 record = find_option(name, false, missing_ok, ERROR);
4225 if (record == NULL)
4226 return NULL;
4227 if (restrict_privileged &&
4228 !ConfigOptionIsVisible(record))
4229 ereport(ERROR,
4230 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4231 errmsg("permission denied to examine \"%s\"", name),
4232 errdetail("Only roles with privileges of the \"%s\" role may examine this parameter.",
4233 "pg_read_all_settings")));
4234
4235 switch (record->vartype)
4236 {
4237 case PGC_BOOL:
4238 return *record->_bool.variable ? "on" : "off";
4239
4240 case PGC_INT:
4241 snprintf(buffer, sizeof(buffer), "%d",
4242 *record->_int.variable);
4243 return buffer;
4244
4245 case PGC_REAL:
4246 snprintf(buffer, sizeof(buffer), "%g",
4247 *record->_real.variable);
4248 return buffer;
4249
4250 case PGC_STRING:
4251 return *record->_string.variable ?
4252 *record->_string.variable : "";
4253
4254 case PGC_ENUM:
4255 return config_enum_lookup_by_value(record,
4256 *record->_enum.variable);
4257 }
4258 return NULL;
4259}
errdetail
int errdetail(const char *fmt,...)
Definition: elog.c:1216
config_enum_lookup_by_value
const char * config_enum_lookup_by_value(const struct config_generic *record, int val)
Definition: guc.c:2895
ConfigOptionIsVisible
bool ConfigOptionIsVisible(const struct config_generic *conf)
Definition: guc_funcs.c:607

References config_generic::_bool, config_generic::_enum, config_generic::_int, config_generic::_real, config_generic::_string, config_enum_lookup_by_value(), ConfigOptionIsVisible(), ereport, errcode(), errdetail(), errmsg(), ERROR, find_option(), name, PGC_BOOL, PGC_ENUM, PGC_INT, PGC_REAL, PGC_STRING, snprintf, config_bool::variable, config_int::variable, config_real::variable, config_string::variable, config_enum::variable, and config_generic::vartype.

Referenced by applyRemoteGucs(), be_tls_init(), CreateSharedMemoryAndSemaphores(), PostmasterMain(), and ProcessConfigFileInternal().

◆ GetConfigOptionByName()

char * GetConfigOptionByName ( const char *  name,
const char **  varname,
bool  missing_ok 
)

Definition at line 5301 of file guc.c.

5302{
5303 struct config_generic *record;
5304
5305 record = find_option(name, false, missing_ok, ERROR);
5306 if (record == NULL)
5307 {
5308 if (varname)
5309 *varname = NULL;
5310 return NULL;
5311 }
5312
5313 if (!ConfigOptionIsVisible(record))
5314 ereport(ERROR,
5315 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
5316 errmsg("permission denied to examine \"%s\"", name),
5317 errdetail("Only roles with privileges of the \"%s\" role may examine this parameter.",
5318 "pg_read_all_settings")));
5319
5320 if (varname)
5321 *varname = record->name;
5322
5323 return ShowGUCOption(record, true);
5324}
ShowGUCOption
char * ShowGUCOption(const struct config_generic *record, bool use_units)
Definition: guc.c:5334
config_generic::name
const char * name
Definition: guc_tables.h:252

References ConfigOptionIsVisible(), ereport, errcode(), errdetail(), errmsg(), ERROR, find_option(), name, config_generic::name, and ShowGUCOption().

Referenced by ExplainPrintSettings(), ExtractSetVariableArgs(), GetPGVariableResultDesc(), set_config_by_name(), show_config_by_name(), show_config_by_name_missing_ok(), and ShowGUCConfigOption().

◆ GetConfigOptionFlags()

int GetConfigOptionFlags ( const char *  name,
bool  missing_ok 
)

Definition at line 4316 of file guc.c.

4317{
4318 struct config_generic *record;
4319
4320 record = find_option(name, false, missing_ok, ERROR);
4321 if (record == NULL)
4322 return 0;
4323 return record->flags;
4324}

References ERROR, find_option(), config_generic::flags, and name.

Referenced by pg_get_functiondef(), and PostmasterMain().

◆ GetConfigOptionResetString()

const char * GetConfigOptionResetString ( const char *  name)

Definition at line 4269 of file guc.c.

4270{
4271 struct config_generic *record;
4272 static char buffer[256];
4273
4274 record = find_option(name, false, false, ERROR);
4275 Assert(record != NULL);
4276 if (!ConfigOptionIsVisible(record))
4277 ereport(ERROR,
4278 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4279 errmsg("permission denied to examine \"%s\"", name),
4280 errdetail("Only roles with privileges of the \"%s\" role may examine this parameter.",
4281 "pg_read_all_settings")));
4282
4283 switch (record->vartype)
4284 {
4285 case PGC_BOOL:
4286 return record->_bool.reset_val ? "on" : "off";
4287
4288 case PGC_INT:
4289 snprintf(buffer, sizeof(buffer), "%d",
4290 record->_int.reset_val);
4291 return buffer;
4292
4293 case PGC_REAL:
4294 snprintf(buffer, sizeof(buffer), "%g",
4295 record->_real.reset_val);
4296 return buffer;
4297
4298 case PGC_STRING:
4299 return record->_string.reset_val ?
4300 record->_string.reset_val : "";
4301
4302 case PGC_ENUM:
4303 return config_enum_lookup_by_value(record,
4304 record->_enum.reset_val);
4305 }
4306 return NULL;
4307}
config_bool::reset_val
bool reset_val
Definition: guc_tables.h:147
config_enum::reset_val
int reset_val
Definition: guc_tables.h:210
config_int::reset_val
int reset_val
Definition: guc_tables.h:161
config_real::reset_val
double reset_val
Definition: guc_tables.h:175
config_string::reset_val
char * reset_val
Definition: guc_tables.h:197

References config_generic::_bool, config_generic::_enum, config_generic::_int, config_generic::_real, config_generic::_string, Assert(), config_enum_lookup_by_value(), ConfigOptionIsVisible(), ereport, errcode(), errdetail(), errmsg(), ERROR, find_option(), name, PGC_BOOL, PGC_ENUM, PGC_INT, PGC_REAL, PGC_STRING, config_bool::reset_val, config_int::reset_val, config_real::reset_val, config_string::reset_val, config_enum::reset_val, snprintf, and config_generic::vartype.

Referenced by check_datestyle().

◆ GetPGVariable()

void GetPGVariable ( const char *  name,
DestReceiver *  dest 
)

Definition at line 408 of file guc_funcs.c.

409{
410 if (guc_name_compare(name, "all") == 0)
411 ShowAllGUCConfig(dest);
412 else
413 ShowGUCConfigOption(name, dest);
414}
ShowGUCConfigOption
static void ShowGUCConfigOption(const char *name, DestReceiver *dest)
Definition: guc_funcs.c:454
ShowAllGUCConfig
static void ShowAllGUCConfig(DestReceiver *dest)
Definition: guc_funcs.c:482
generate_unaccent_rules.dest
dest
Definition: generate_unaccent_rules.py:285

References generate_unaccent_rules::dest, guc_name_compare(), name, ShowAllGUCConfig(), and ShowGUCConfigOption().

Referenced by exec_replication_command(), and standard_ProcessUtility().

◆ GetPGVariableResultDesc()

TupleDesc GetPGVariableResultDesc ( const char *  name)

Definition at line 420 of file guc_funcs.c.

421{
422 TupleDesc tupdesc;
423
424 if (guc_name_compare(name, "all") == 0)
425 {
426 /* need a tuple descriptor representing three TEXT columns */
427 tupdesc = CreateTemplateTupleDesc(3);
428 TupleDescInitEntry(tupdesc, (AttrNumber) 1, "name",
429 TEXTOID, -1, 0);
430 TupleDescInitEntry(tupdesc, (AttrNumber) 2, "setting",
431 TEXTOID, -1, 0);
432 TupleDescInitEntry(tupdesc, (AttrNumber) 3, "description",
433 TEXTOID, -1, 0);
434 }
435 else
436 {
437 const char *varname;
438
439 /* Get the canonical spelling of name */
440 (void) GetConfigOptionByName(name, &varname, false);
441
442 /* need a tuple descriptor representing a single TEXT column */
443 tupdesc = CreateTemplateTupleDesc(1);
444 TupleDescInitEntry(tupdesc, (AttrNumber) 1, varname,
445 TEXTOID, -1, 0);
446 }
447 return tupdesc;
448}
AttrNumber
int16 AttrNumber
Definition: attnum.h:21
CreateTemplateTupleDesc
TupleDesc CreateTemplateTupleDesc(int natts)
Definition: tupdesc.c:182
TupleDescInitEntry
void TupleDescInitEntry(TupleDesc desc, AttrNumber attributeNumber, const char *attributeName, Oid oidtypeid, int32 typmod, int attdim)
Definition: tupdesc.c:842

References CreateTemplateTupleDesc(), GetConfigOptionByName(), guc_name_compare(), name, and TupleDescInitEntry().

Referenced by UtilityTupleDescriptor().

◆ GUC_check_errcode()

void GUC_check_errcode ( int  sqlerrcode)

Definition at line 6628 of file guc.c.

6629{
6630 GUC_check_errcode_value = sqlerrcode;
6631}
GUC_check_errcode_value
static int GUC_check_errcode_value
Definition: guc.c:77

References GUC_check_errcode_value.

Referenced by check_client_encoding(), check_default_with_oids(), check_primary_slot_name(), check_role(), check_session_authorization(), check_synchronous_standby_names(), check_transaction_deferrable(), check_transaction_isolation(), check_transaction_read_only(), and validate_sync_standby_slots().

◆ guc_free()

void guc_free ( void *  ptr)

Definition at line 687 of file guc.c.

688{
689 /*
690 * Historically, GUC-related code has relied heavily on the ability to do
691 * free(NULL), so we allow that here even though pfree() doesn't.
692 */
693 if (ptr != NULL)
694 {
695 /* This is to help catch old code that malloc's GUC data. */
696 Assert(GetMemoryChunkContext(ptr) == GUCMemoryContext);
697 pfree(ptr);
698 }
699}
GUCMemoryContext
static MemoryContext GUCMemoryContext
Definition: guc.c:200
GetMemoryChunkContext
MemoryContext GetMemoryChunkContext(void *pointer)
Definition: mcxt.c:753

References Assert(), GetMemoryChunkContext(), GUCMemoryContext, and pfree().

Referenced by add_placeholder_variable(), AlterSystemSetConfigFile(), call_string_check_hook(), check_application_name(), check_client_encoding(), check_cluster_name(), check_datestyle(), check_default_text_search_config(), free_placeholder(), parse_and_validate_value(), ReportGUCOption(), RestoreGUCState(), SelectConfigFiles(), set_config_sourcefile(), set_config_with_handle(), set_extra_field(), and set_string_field().

◆ guc_malloc()

void * guc_malloc ( int  elevel,
size_t  size 
)

Definition at line 636 of file guc.c.

637{
638 void *data;
639
640 data = MemoryContextAllocExtended(GUCMemoryContext, size,
641 MCXT_ALLOC_NO_OOM);
642 if (unlikely(data == NULL))
643 ereport(elevel,
644 (errcode(ERRCODE_OUT_OF_MEMORY),
645 errmsg("out of memory")));
646 return data;
647}
unlikely
#define unlikely(x)
Definition: c.h:407
MCXT_ALLOC_NO_OOM
#define MCXT_ALLOC_NO_OOM
Definition: fe_memutils.h:29
MemoryContextAllocExtended
void * MemoryContextAllocExtended(MemoryContext context, Size size, int flags)
Definition: mcxt.c:1286
data
const void * data
Definition: pg_crc32c_sse42.c:27

References data, ereport, errcode(), errmsg(), GUCMemoryContext, MCXT_ALLOC_NO_OOM, MemoryContextAllocExtended(), and unlikely.

Referenced by add_placeholder_variable(), check_backtrace_functions(), check_client_encoding(), check_createrole_self_grant(), check_datestyle(), check_debug_io_direct(), check_log_connections(), check_log_destination(), check_log_timezone(), check_random_seed(), check_recovery_target_lsn(), check_recovery_target_timeline(), check_recovery_target_xid(), check_restrict_nonsystem_relation_kind(), check_role(), check_session_authorization(), check_synchronized_standby_slots(), check_synchronous_standby_names(), check_temp_tablespaces(), check_timezone(), check_wal_consistency_checking(), ConvertTimeZoneAbbrevs(), guc_strdup(), init_custom_variable(), plpgsql_extra_checks_check_hook(), and SelectConfigFiles().

◆ guc_realloc()

pg_nodiscard void * guc_realloc ( int  elevel,
void *  old,
size_t  size 
)

Definition at line 650 of file guc.c.

651{
652 void *data;
653
654 if (old != NULL)
655 {
656 /* This is to help catch old code that malloc's GUC data. */
657 Assert(GetMemoryChunkContext(old) == GUCMemoryContext);
658 data = repalloc_extended(old, size,
659 MCXT_ALLOC_NO_OOM);
660 }
661 else
662 {
663 /* Like realloc(3), but not like repalloc(), we allow old == NULL. */
664 data = MemoryContextAllocExtended(GUCMemoryContext, size,
665 MCXT_ALLOC_NO_OOM);
666 }
667 if (unlikely(data == NULL))
668 ereport(elevel,
669 (errcode(ERRCODE_OUT_OF_MEMORY),
670 errmsg("out of memory")));
671 return data;
672}
repalloc_extended
void * repalloc_extended(void *pointer, Size size, int flags)
Definition: mcxt.c:1645

References Assert(), data, ereport, errcode(), errmsg(), GetMemoryChunkContext(), GUCMemoryContext, MCXT_ALLOC_NO_OOM, MemoryContextAllocExtended(), repalloc_extended(), and unlikely.

◆ guc_strdup()

char * guc_strdup ( int  elevel,
const char *  src 
)

Definition at line 675 of file guc.c.

676{
677 char *data;
678 size_t len = strlen(src) + 1;
679
680 data = guc_malloc(elevel, len);
681 if (likely(data != NULL))
682 memcpy(data, src, len);
683 return data;
684}
likely
#define likely(x)
Definition: c.h:406
guc_malloc
void * guc_malloc(int elevel, size_t size)
Definition: guc.c:636

References data, guc_malloc(), len, and likely.

Referenced by add_placeholder_variable(), check_application_name(), check_client_encoding(), check_cluster_name(), check_datestyle(), check_default_text_search_config(), init_custom_variable(), InitializeOneGUCOption(), parse_and_validate_value(), ReportGUCOption(), set_config_sourcefile(), and set_config_with_handle().

◆ GUCArrayAdd()

ArrayType * GUCArrayAdd ( ArrayType *  array,
const char *  name,
const char *  value 
)

Definition at line 6328 of file guc.c.

6329{
6330 struct config_generic *record;
6331 Datum datum;
6332 char *newval;
6333 ArrayType *a;
6334
6335 Assert(name);
6336 Assert(value);
6337
6338 /* test if the option is valid and we're allowed to set it */
6339 (void) validate_option_array_item(name, value, false);
6340
6341 /* normalize name (converts obsolete GUC names to modern spellings) */
6342 record = find_option(name, false, true, WARNING);
6343 if (record)
6344 name = record->name;
6345
6346 /* build new item for array */
6347 newval = psprintf("%s=%s", name, value);
6348 datum = CStringGetTextDatum(newval);
6349
6350 if (array)
6351 {
6352 int index;
6353 bool isnull;
6354
6355 Assert(ARR_ELEMTYPE(array) == TEXTOID);
6356 Assert(ARR_NDIM(array) == 1);
6357 Assert(ARR_LBOUND(array)[0] == 1);
6358
6359 index = ARR_DIMS(array)[0] + 1; /* add after end */
6360
6361 for (int i = 1; i <= ARR_DIMS(array)[0]; i++)
6362 {
6363 Datum d;
6364 char *current;
6365
6366 d = array_ref(array, 1, &i,
6367 -1 /* varlenarray */ ,
6368 -1 /* TEXT's typlen */ ,
6369 false /* TEXT's typbyval */ ,
6370 TYPALIGN_INT /* TEXT's typalign */ ,
6371 &isnull);
6372 if (isnull)
6373 continue;
6374 current = TextDatumGetCString(d);
6375
6376 /* check for match up through and including '=' */
6377 if (strncmp(current, newval, strlen(name) + 1) == 0)
6378 {
6379 index = i;
6380 break;
6381 }
6382 }
6383
6384 a = array_set(array, 1, &index,
6385 datum,
6386 false,
6387 -1 /* varlena array */ ,
6388 -1 /* TEXT's typlen */ ,
6389 false /* TEXT's typbyval */ ,
6390 TYPALIGN_INT /* TEXT's typalign */ );
6391 }
6392 else
6393 a = construct_array_builtin(&datum, 1, TEXTOID);
6394
6395 return a;
6396}
ARR_NDIM
#define ARR_NDIM(a)
Definition: array.h:290
ARR_ELEMTYPE
#define ARR_ELEMTYPE(a)
Definition: array.h:292
ARR_DIMS
#define ARR_DIMS(a)
Definition: array.h:294
ARR_LBOUND
#define ARR_LBOUND(a)
Definition: array.h:296
array_set
ArrayType * array_set(ArrayType *array, int nSubscripts, int *indx, Datum dataValue, bool isNull, int arraytyplen, int elmlen, bool elmbyval, char elmalign)
Definition: arrayfuncs.c:3164
array_ref
Datum array_ref(ArrayType *array, int nSubscripts, int *indx, int arraytyplen, int elmlen, bool elmbyval, char elmalign, bool *isNull)
Definition: arrayfuncs.c:3147
construct_array_builtin
ArrayType * construct_array_builtin(Datum *elems, int nelems, Oid elmtype)
Definition: arrayfuncs.c:3382
CStringGetTextDatum
#define CStringGetTextDatum(s)
Definition: builtins.h:97
TextDatumGetCString
#define TextDatumGetCString(d)
Definition: builtins.h:98
validate_option_array_item
static bool validate_option_array_item(const char *name, const char *value, bool skipIfNoPermissions)
Definition: guc.c:6545
a
int a
Definition: isn.c:73
Datum
uint64_t Datum
Definition: postgres.h:70
psprintf
char * psprintf(const char *fmt,...)
Definition: psprintf.c:43
index
Definition: type.h:96

References a, ARR_DIMS, ARR_ELEMTYPE, ARR_LBOUND, ARR_NDIM, array_ref(), array_set(), Assert(), construct_array_builtin(), CStringGetTextDatum, find_option(), i, name, config_generic::name, newval, psprintf(), TextDatumGetCString, validate_option_array_item(), value, and WARNING.

Referenced by AlterSetting(), and update_proconfig_value().

◆ GUCArrayDelete()

ArrayType * GUCArrayDelete ( ArrayType *  array,
const char *  name 
)

Definition at line 6405 of file guc.c.

6406{
6407 struct config_generic *record;
6408 ArrayType *newarray;
6409 int index;
6410
6411 Assert(name);
6412
6413 /* test if the option is valid and we're allowed to set it */
6414 (void) validate_option_array_item(name, NULL, false);
6415
6416 /* normalize name (converts obsolete GUC names to modern spellings) */
6417 record = find_option(name, false, true, WARNING);
6418 if (record)
6419 name = record->name;
6420
6421 /* if array is currently null, then surely nothing to delete */
6422 if (!array)
6423 return NULL;
6424
6425 newarray = NULL;
6426 index = 1;
6427
6428 for (int i = 1; i <= ARR_DIMS(array)[0]; i++)
6429 {
6430 Datum d;
6431 char *val;
6432 bool isnull;
6433
6434 d = array_ref(array, 1, &i,
6435 -1 /* varlenarray */ ,
6436 -1 /* TEXT's typlen */ ,
6437 false /* TEXT's typbyval */ ,
6438 TYPALIGN_INT /* TEXT's typalign */ ,
6439 &isnull);
6440 if (isnull)
6441 continue;
6442 val = TextDatumGetCString(d);
6443
6444 /* ignore entry if it's what we want to delete */
6445 if (strncmp(val, name, strlen(name)) == 0
6446 && val[strlen(name)] == '=')
6447 continue;
6448
6449 /* else add it to the output array */
6450 if (newarray)
6451 newarray = array_set(newarray, 1, &index,
6452 d,
6453 false,
6454 -1 /* varlenarray */ ,
6455 -1 /* TEXT's typlen */ ,
6456 false /* TEXT's typbyval */ ,
6457 TYPALIGN_INT /* TEXT's typalign */ );
6458 else
6459 newarray = construct_array_builtin(&d, 1, TEXTOID);
6460
6461 index++;
6462 }
6463
6464 return newarray;
6465}
val
long val
Definition: informix.c:689

References ARR_DIMS, array_ref(), array_set(), Assert(), construct_array_builtin(), find_option(), i, name, config_generic::name, TextDatumGetCString, val, validate_option_array_item(), and WARNING.

Referenced by AlterSetting(), and update_proconfig_value().

◆ GUCArrayReset()

ArrayType * GUCArrayReset ( ArrayType *  array)

Definition at line 6474 of file guc.c.

6475{
6476 ArrayType *newarray;
6477 int index;
6478
6479 /* if array is currently null, nothing to do */
6480 if (!array)
6481 return NULL;
6482
6483 /* if we're superuser, we can delete everything, so just do it */
6484 if (superuser())
6485 return NULL;
6486
6487 newarray = NULL;
6488 index = 1;
6489
6490 for (int i = 1; i <= ARR_DIMS(array)[0]; i++)
6491 {
6492 Datum d;
6493 char *val;
6494 char *eqsgn;
6495 bool isnull;
6496
6497 d = array_ref(array, 1, &i,
6498 -1 /* varlenarray */ ,
6499 -1 /* TEXT's typlen */ ,
6500 false /* TEXT's typbyval */ ,
6501 TYPALIGN_INT /* TEXT's typalign */ ,
6502 &isnull);
6503 if (isnull)
6504 continue;
6505 val = TextDatumGetCString(d);
6506
6507 eqsgn = strchr(val, '=');
6508 *eqsgn = '\0';
6509
6510 /* skip if we have permission to delete it */
6511 if (validate_option_array_item(val, NULL, true))
6512 continue;
6513
6514 /* else add it to the output array */
6515 if (newarray)
6516 newarray = array_set(newarray, 1, &index,
6517 d,
6518 false,
6519 -1 /* varlenarray */ ,
6520 -1 /* TEXT's typlen */ ,
6521 false /* TEXT's typbyval */ ,
6522 TYPALIGN_INT /* TEXT's typalign */ );
6523 else
6524 newarray = construct_array_builtin(&d, 1, TEXTOID);
6525
6526 index++;
6527 pfree(val);
6528 }
6529
6530 return newarray;
6531}

References ARR_DIMS, array_ref(), array_set(), construct_array_builtin(), i, pfree(), superuser(), TextDatumGetCString, val, and validate_option_array_item().

Referenced by AlterSetting().

◆ InitializeGUCOptions()

void InitializeGUCOptions ( void  )

Definition at line 1407 of file guc.c.

1408{
1409 HASH_SEQ_STATUS status;
1410 GUCHashEntry *hentry;
1411
1412 /*
1413 * Before log_line_prefix could possibly receive a nonempty setting, make
1414 * sure that timezone processing is minimally alive (see elog.c).
1415 */
1416 pg_timezone_initialize();
1417
1418 /*
1419 * Create GUCMemoryContext and build hash table of all GUC variables.
1420 */
1421 build_guc_variables();
1422
1423 /*
1424 * Load all variables with their compiled-in defaults, and initialize
1425 * status fields as needed.
1426 */
1427 hash_seq_init(&status, guc_hashtab);
1428 while ((hentry = (GUCHashEntry *) hash_seq_search(&status)) != NULL)
1429 {
1430 /* Check mapping between initial and default value */
1431 Assert(check_GUC_init(hentry->gucvar));
1432
1433 InitializeOneGUCOption(hentry->gucvar);
1434 }
1435
1436 reporting_enabled = false;
1437
1438 /*
1439 * Prevent any attempt to override the transaction modes from
1440 * non-interactive sources.
1441 */
1442 SetConfigOption("transaction_isolation", "read committed",
1443 PGC_POSTMASTER, PGC_S_OVERRIDE);
1444 SetConfigOption("transaction_read_only", "no",
1445 PGC_POSTMASTER, PGC_S_OVERRIDE);
1446 SetConfigOption("transaction_deferrable", "no",
1447 PGC_POSTMASTER, PGC_S_OVERRIDE);
1448
1449 /*
1450 * For historical reasons, some GUC parameters can receive defaults from
1451 * environment variables. Process those settings.
1452 */
1453 InitializeGUCOptionsFromEnvironment();
1454}
InitializeOneGUCOption
static void InitializeOneGUCOption(struct config_generic *gconf)
Definition: guc.c:1521
build_guc_variables
void build_guc_variables(void)
Definition: guc.c:870
InitializeGUCOptionsFromEnvironment
static void InitializeGUCOptionsFromEnvironment(void)
Definition: guc.c:1466
pg_timezone_initialize
void pg_timezone_initialize(void)
Definition: pgtz.c:361

References Assert(), build_guc_variables(), guc_hashtab, GUCHashEntry::gucvar, hash_seq_init(), hash_seq_search(), InitializeGUCOptionsFromEnvironment(), InitializeOneGUCOption(), pg_timezone_initialize(), PGC_POSTMASTER, PGC_S_OVERRIDE, reporting_enabled, and SetConfigOption().

Referenced by BootstrapModeMain(), PostgresSingleUserMain(), and PostmasterMain().

◆ MarkGUCPrefixReserved()

void void void void void void MarkGUCPrefixReserved ( const char *  className)

Definition at line 5148 of file guc.c.

5149{
5150 int classLen = strlen(className);
5151 HASH_SEQ_STATUS status;
5152 GUCHashEntry *hentry;
5153 MemoryContext oldcontext;
5154
5155 /*
5156 * Check for existing placeholders. We must actually remove invalid
5157 * placeholders, else future parallel worker startups will fail.
5158 */
5159 hash_seq_init(&status, guc_hashtab);
5160 while ((hentry = (GUCHashEntry *) hash_seq_search(&status)) != NULL)
5161 {
5162 struct config_generic *var = hentry->gucvar;
5163
5164 if ((var->flags & GUC_CUSTOM_PLACEHOLDER) != 0 &&
5165 strncmp(className, var->name, classLen) == 0 &&
5166 var->name[classLen] == GUC_QUALIFIER_SEPARATOR)
5167 {
5168 ereport(WARNING,
5169 (errcode(ERRCODE_INVALID_NAME),
5170 errmsg("invalid configuration parameter name \"%s\", removing it",
5171 var->name),
5172 errdetail("\"%s\" is now a reserved prefix.",
5173 className)));
5174 /* Remove it from the hash table */
5175 hash_search(guc_hashtab,
5176 &var->name,
5177 HASH_REMOVE,
5178 NULL);
5179 /* Remove it from any lists it's in, too */
5180 RemoveGUCFromLists(var);
5181 /* And free it */
5182 free_placeholder(var);
5183 }
5184 }
5185
5186 /* And remember the name so we can prevent future mistakes. */
5187 oldcontext = MemoryContextSwitchTo(GUCMemoryContext);
5188 reserved_class_prefix = lappend(reserved_class_prefix, pstrdup(className));
5189 MemoryContextSwitchTo(oldcontext);
5190}
hash_search
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:952
free_placeholder
static void free_placeholder(struct config_generic *pHolder)
Definition: guc.c:4996
RemoveGUCFromLists
static void RemoveGUCFromLists(struct config_generic *gconf)
Definition: guc.c:1632
reserved_class_prefix
static List * reserved_class_prefix
Definition: guc.c:79
GUC_QUALIFIER_SEPARATOR
#define GUC_QUALIFIER_SEPARATOR
Definition: guc.h:208
HASH_REMOVE
@ HASH_REMOVE
Definition: hsearch.h:115
lappend
List * lappend(List *list, void *datum)
Definition: list.c:339
MemoryContextSwitchTo
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:124

References ereport, errcode(), errdetail(), errmsg(), config_generic::flags, free_placeholder(), GUC_CUSTOM_PLACEHOLDER, guc_hashtab, GUC_QUALIFIER_SEPARATOR, GUCMemoryContext, GUCHashEntry::gucvar, HASH_REMOVE, hash_search(), hash_seq_init(), hash_seq_search(), lappend(), MemoryContextSwitchTo(), config_generic::name, pstrdup(), RemoveGUCFromLists(), reserved_class_prefix, config_generic::status, and WARNING.

Referenced by _PG_init().

◆ NewGUCNestLevel()

int NewGUCNestLevel ( void  )

Definition at line 2110 of file guc.c.

2111{
2112 return ++GUCNestLevel;
2113}

References GUCNestLevel.

Referenced by amcheck_lock_relation_and_check(), applyRemoteGucs(), brin_summarize_range(), cluster_rel(), ComputeIndexAttrs(), CreateSchemaCommand(), DefineIndex(), do_analyze_rel(), execute_extension_script(), fmgr_security_definer(), index_build(), index_concurrently_build(), ProcedureCreate(), PushTransaction(), RefreshMatViewByOid(), reindex_index(), ReindexRelationConcurrently(), RI_Initial_Check(), RI_PartitionRemove_Check(), set_transmission_modes(), SwitchToUntrustedUser(), vacuum_rel(), and validate_index().

◆ parse_int()

bool parse_int ( const char *  value,
int *  result,
int  flags,
const char **  hintmsg 
)

Definition at line 2743 of file guc.c.

2744{
2745 /*
2746 * We assume here that double is wide enough to represent any integer
2747 * value with adequate precision.
2748 */
2749 double val;
2750 char *endptr;
2751
2752 /* To suppress compiler warnings, always set output params */
2753 if (result)
2754 *result = 0;
2755 if (hintmsg)
2756 *hintmsg = NULL;
2757
2758 /*
2759 * Try to parse as an integer (allowing octal or hex input). If the
2760 * conversion stops at a decimal point or 'e', or overflows, re-parse as
2761 * float. This should work fine as long as we have no unit names starting
2762 * with 'e'. If we ever do, the test could be extended to check for a
2763 * sign or digit after 'e', but for now that's unnecessary.
2764 */
2765 errno = 0;
2766 val = strtol(value, &endptr, 0);
2767 if (*endptr == '.' || *endptr == 'e' || *endptr == 'E' ||
2768 errno == ERANGE)
2769 {
2770 errno = 0;
2771 val = strtod(value, &endptr);
2772 }
2773
2774 if (endptr == value || errno == ERANGE)
2775 return false; /* no HINT for these cases */
2776
2777 /* reject NaN (infinities will fail range check below) */
2778 if (isnan(val))
2779 return false; /* treat same as syntax error; no HINT */
2780
2781 /* allow whitespace between number and unit */
2782 while (isspace((unsigned char) *endptr))
2783 endptr++;
2784
2785 /* Handle possible unit */
2786 if (*endptr != '\0')
2787 {
2788 if ((flags & GUC_UNIT) == 0)
2789 return false; /* this setting does not accept a unit */
2790
2791 if (!convert_to_base_unit(val,
2792 endptr, (flags & GUC_UNIT),
2793 &val))
2794 {
2795 /* invalid unit, or garbage after the unit; set hint and fail. */
2796 if (hintmsg)
2797 {
2798 if (flags & GUC_UNIT_MEMORY)
2799 *hintmsg = memory_units_hint;
2800 else
2801 *hintmsg = time_units_hint;
2802 }
2803 return false;
2804 }
2805 }
2806
2807 /* Round to int, then check for overflow */
2808 val = rint(val);
2809
2810 if (val > INT_MAX || val < INT_MIN)
2811 {
2812 if (hintmsg)
2813 *hintmsg = gettext_noop("Value exceeds integer range.");
2814 return false;
2815 }
2816
2817 if (result)
2818 *result = (int) val;
2819 return true;
2820}
gettext_noop
#define gettext_noop(x)
Definition: c.h:1184
convert_to_base_unit
static bool convert_to_base_unit(double value, const char *unit, int base_unit, double *base_value)
Definition: guc.c:2546
memory_units_hint
static const char *const memory_units_hint
Definition: guc.c:120
time_units_hint
static const char *const time_units_hint
Definition: guc.c:157
GUC_UNIT_MEMORY
#define GUC_UNIT_MEMORY
Definition: guc.h:237

References convert_to_base_unit(), config_generic::flags, gettext_noop, GUC_UNIT, GUC_UNIT_MEMORY, memory_units_hint, time_units_hint, val, and value.

Referenced by apply_server_options(), apply_table_options(), ExecVacuum(), get_batch_size_option(), parse_and_validate_value(), parse_one_reloption(), postgres_fdw_validator(), and postgresAcquireSampleRowsFunc().

◆ parse_real()

bool parse_real ( const char *  value,
double *  result,
int  flags,
const char **  hintmsg 
)

Definition at line 2833 of file guc.c.

2834{
2835 double val;
2836 char *endptr;
2837
2838 /* To suppress compiler warnings, always set output params */
2839 if (result)
2840 *result = 0;
2841 if (hintmsg)
2842 *hintmsg = NULL;
2843
2844 errno = 0;
2845 val = strtod(value, &endptr);
2846
2847 if (endptr == value || errno == ERANGE)
2848 return false; /* no HINT for these cases */
2849
2850 /* reject NaN (infinities will fail range checks later) */
2851 if (isnan(val))
2852 return false; /* treat same as syntax error; no HINT */
2853
2854 /* allow whitespace between number and unit */
2855 while (isspace((unsigned char) *endptr))
2856 endptr++;
2857
2858 /* Handle possible unit */
2859 if (*endptr != '\0')
2860 {
2861 if ((flags & GUC_UNIT) == 0)
2862 return false; /* this setting does not accept a unit */
2863
2864 if (!convert_to_base_unit(val,
2865 endptr, (flags & GUC_UNIT),
2866 &val))
2867 {
2868 /* invalid unit, or garbage after the unit; set hint and fail. */
2869 if (hintmsg)
2870 {
2871 if (flags & GUC_UNIT_MEMORY)
2872 *hintmsg = memory_units_hint;
2873 else
2874 *hintmsg = time_units_hint;
2875 }
2876 return false;
2877 }
2878 }
2879
2880 if (result)
2881 *result = val;
2882 return true;
2883}

References convert_to_base_unit(), config_generic::flags, GUC_UNIT, GUC_UNIT_MEMORY, memory_units_hint, time_units_hint, val, and value.

Referenced by apply_server_options(), ExecWaitStmt(), parse_and_validate_value(), parse_one_reloption(), and postgres_fdw_validator().

◆ ParseConfigDirectory()

bool ParseConfigDirectory ( const char *  includedir,
const char *  calling_file,
int  calling_lineno,
int  depth,
int  elevel,
ConfigVariable **  head_p,
ConfigVariable **  tail_p 
)

Definition at line 581 of file guc-file.l.

586{
587 char *err_msg;
588 char **filenames;
589 int num_filenames;
590
591 filenames = GetConfFilesInDir(includedir, calling_file, elevel,
592 &num_filenames, &err_msg);
593
594 if (!filenames)
595 {
596 record_config_file_error(err_msg, calling_file, calling_lineno, head_p,
597 tail_p);
598 return false;
599 }
600
601 for (int i = 0; i < num_filenames; i++)
602 {
603 if (!ParseConfigFile(filenames[i], true,
604 calling_file, calling_lineno,
605 depth, elevel,
606 head_p, tail_p))
607 return false;
608 }
609
610 return true;
611}
GetConfFilesInDir
char ** GetConfFilesInDir(const char *includedir, const char *calling_file, int elevel, int *num_filenames, char **err_msg)
Definition: conffiles.c:70
record_config_file_error
void record_config_file_error(const char *errmsg, const char *config_file, int lineno, ConfigVariable **head_p, ConfigVariable **tail_p)
Definition: guc-file.l:278
ParseConfigFile
bool ParseConfigFile(const char *config_file, bool strict, const char *calling_file, int calling_lineno, int depth, int elevel, ConfigVariable **head_p, ConfigVariable **tail_p)
Definition: guc-file.l:175

References GetConfFilesInDir(), i, ParseConfigFile(), and record_config_file_error().

Referenced by ParseConfigFp().

◆ ParseConfigFile()

bool ParseConfigFile ( const char *  config_file,
bool  strict,
const char *  calling_file,
int  calling_lineno,
int  depth,
int  elevel,
ConfigVariable **  head_p,
ConfigVariable **  tail_p 
)

Definition at line 175 of file guc-file.l.

180{
181 char *abs_path;
182 bool OK = true;
183 FILE *fp;
184
185 /*
186 * Reject file name that is all-blank (including empty), as that leads to
187 * confusion --- we'd try to read the containing directory as a file.
188 */
189 if (strspn(config_file, " \t\r\n") == strlen(config_file))
190 {
191 ereport(elevel,
192 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
193 errmsg("empty configuration file name: \"%s\"",
194 config_file)));
195 record_config_file_error("empty configuration file name",
196 calling_file, calling_lineno,
197 head_p, tail_p);
198 return false;
199 }
200
201 /*
202 * Reject too-deep include nesting depth. This is just a safety check to
203 * avoid dumping core due to stack overflow if an include file loops back
204 * to itself. The maximum nesting depth is pretty arbitrary.
205 */
206 if (depth > CONF_FILE_MAX_DEPTH)
207 {
208 ereport(elevel,
209 (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
210 errmsg("could not open configuration file \"%s\": maximum nesting depth exceeded",
211 config_file)));
212 record_config_file_error("nesting depth exceeded",
213 calling_file, calling_lineno,
214 head_p, tail_p);
215 return false;
216 }
217
218 abs_path = AbsoluteConfigLocation(config_file, calling_file);
219
220 /*
221 * Reject direct recursion. Indirect recursion is also possible, but it's
222 * harder to detect and so doesn't seem worth the trouble. (We test at
223 * this step because the canonicalization done by AbsoluteConfigLocation
224 * makes it more likely that a simple strcmp comparison will match.)
225 */
226 if (calling_file && strcmp(abs_path, calling_file) == 0)
227 {
228 ereport(elevel,
229 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
230 errmsg("configuration file recursion in \"%s\"",
231 calling_file)));
232 record_config_file_error("configuration file recursion",
233 calling_file, calling_lineno,
234 head_p, tail_p);
235 pfree(abs_path);
236 return false;
237 }
238
239 fp = AllocateFile(abs_path, "r");
240 if (!fp)
241 {
242 if (strict)
243 {
244 ereport(elevel,
245 (errcode_for_file_access(),
246 errmsg("could not open configuration file \"%s\": %m",
247 abs_path)));
248 record_config_file_error(psprintf("could not open file \"%s\"",
249 abs_path),
250 calling_file, calling_lineno,
251 head_p, tail_p);
252 OK = false;
253 }
254 else
255 {
256 ereport(LOG,
257 (errmsg("skipping missing configuration file \"%s\"",
258 abs_path)));
259 }
260 goto cleanup;
261 }
262
263 OK = ParseConfigFp(fp, abs_path, depth, elevel, head_p, tail_p);
264
265cleanup:
266 if (fp)
267 FreeFile(fp);
268 pfree(abs_path);
269
270 return OK;
271}
cleanup
static void cleanup(void)
Definition: bootstrap.c:715
AbsoluteConfigLocation
char * AbsoluteConfigLocation(const char *location, const char *calling_file)
Definition: conffiles.c:36
CONF_FILE_MAX_DEPTH
#define CONF_FILE_MAX_DEPTH
Definition: conffiles.h:18
config_file
static char * config_file
Definition: pg_rewind.c:71

References AbsoluteConfigLocation(), AllocateFile(), cleanup(), CONF_FILE_MAX_DEPTH, config_file, ereport, errcode(), errcode_for_file_access(), errmsg(), FreeFile(), LOG, ParseConfigFp(), pfree(), psprintf(), and record_config_file_error().

Referenced by ParseConfigDirectory(), ParseConfigFp(), and ProcessConfigFileInternal().

◆ ParseConfigFp()

bool ParseConfigFp ( FILE *  fp,
const char *  config_file,
int  depth,
int  elevel,
ConfigVariable **  head_p,
ConfigVariable **  tail_p 
)

Definition at line 350 of file guc-file.l.

352{
353 volatile bool OK = true;
354 unsigned int save_ConfigFileLineno = ConfigFileLineno;
355 sigjmp_buf *save_GUC_flex_fatal_jmp = GUC_flex_fatal_jmp;
356 sigjmp_buf flex_fatal_jmp;
357 yyscan_t scanner;
358 struct yyguts_t *yyg; /* needed for yytext macro */
359 volatile YY_BUFFER_STATE lex_buffer = NULL;
360 int errorcount;
361 int token;
362
363 if (sigsetjmp(flex_fatal_jmp, 1) == 0)
364 GUC_flex_fatal_jmp = &flex_fatal_jmp;
365 else
366 {
367 /*
368 * Regain control after a fatal, internal flex error. It may have
369 * corrupted parser state. Consequently, abandon the file, but trust
370 * that the state remains sane enough for yy_delete_buffer().
371 */
372 elog(elevel, "%s at file \"%s\" line %u",
373 GUC_flex_fatal_errmsg, config_file, ConfigFileLineno);
374 record_config_file_error(GUC_flex_fatal_errmsg,
375 config_file, ConfigFileLineno,
376 head_p, tail_p);
377 OK = false;
378 goto cleanup;
379 }
380
381 /*
382 * Parse
383 */
384 ConfigFileLineno = 1;
385 errorcount = 0;
386
387 if (yylex_init(&scanner) != 0)
388 elog(elevel, "yylex_init() failed: %m");
389 yyg = (struct yyguts_t *) scanner;
390
391 lex_buffer = yy_create_buffer(fp, YY_BUF_SIZE, scanner);
392 yy_switch_to_buffer(lex_buffer, scanner);
393
394 /* This loop iterates once per logical line */
395 while ((token = yylex(scanner)))
396 {
397 char *opt_name = NULL;
398 char *opt_value = NULL;
399 ConfigVariable *item;
400
401 if (token == GUC_EOL) /* empty or comment line */
402 continue;
403
404 /* first token on line is option name */
405 if (token != GUC_ID && token != GUC_QUALIFIED_ID)
406 goto parse_error;
407 opt_name = pstrdup(yytext);
408
409 /* next we have an optional equal sign; discard if present */
410 token = yylex(scanner);
411 if (token == GUC_EQUALS)
412 token = yylex(scanner);
413
414 /* now we must have the option value */
415 if (token != GUC_ID &&
416 token != GUC_STRING &&
417 token != GUC_INTEGER &&
418 token != GUC_REAL &&
419 token != GUC_UNQUOTED_STRING)
420 goto parse_error;
421 if (token == GUC_STRING) /* strip quotes and escapes */
422 opt_value = DeescapeQuotedString(yytext);
423 else
424 opt_value = pstrdup(yytext);
425
426 /* now we'd like an end of line, or possibly EOF */
427 token = yylex(scanner);
428 if (token != GUC_EOL)
429 {
430 if (token != 0)
431 goto parse_error;
432 /* treat EOF like \n for line numbering purposes, cf bug 4752 */
433 ConfigFileLineno++;
434 }
435
436 /* OK, process the option name and value */
437 if (guc_name_compare(opt_name, "include_dir") == 0)
438 {
439 /*
440 * An include_dir directive isn't a variable and should be
441 * processed immediately.
442 */
443 if (!ParseConfigDirectory(opt_value,
444 config_file, ConfigFileLineno - 1,
445 depth + 1, elevel,
446 head_p, tail_p))
447 OK = false;
448 yy_switch_to_buffer(lex_buffer, scanner);
449 pfree(opt_name);
450 pfree(opt_value);
451 }
452 else if (guc_name_compare(opt_name, "include_if_exists") == 0)
453 {
454 /*
455 * An include_if_exists directive isn't a variable and should be
456 * processed immediately.
457 */
458 if (!ParseConfigFile(opt_value, false,
459 config_file, ConfigFileLineno - 1,
460 depth + 1, elevel,
461 head_p, tail_p))
462 OK = false;
463 yy_switch_to_buffer(lex_buffer, scanner);
464 pfree(opt_name);
465 pfree(opt_value);
466 }
467 else if (guc_name_compare(opt_name, "include") == 0)
468 {
469 /*
470 * An include directive isn't a variable and should be processed
471 * immediately.
472 */
473 if (!ParseConfigFile(opt_value, true,
474 config_file, ConfigFileLineno - 1,
475 depth + 1, elevel,
476 head_p, tail_p))
477 OK = false;
478 yy_switch_to_buffer(lex_buffer, scanner);
479 pfree(opt_name);
480 pfree(opt_value);
481 }
482 else
483 {
484 /* ordinary variable, append to list */
485 item = palloc(sizeof *item);
486 item->name = opt_name;
487 item->value = opt_value;
488 item->errmsg = NULL;
489 item->filename = pstrdup(config_file);
490 item->sourceline = ConfigFileLineno - 1;
491 item->ignore = false;
492 item->applied = false;
493 item->next = NULL;
494 if (*head_p == NULL)
495 *head_p = item;
496 else
497 (*tail_p)->next = item;
498 *tail_p = item;
499 }
500
501 /* break out of loop if read EOF, else loop for next line */
502 if (token == 0)
503 break;
504 continue;
505
506parse_error:
507 /* release storage if we allocated any on this line */
508 if (opt_name)
509 pfree(opt_name);
510 if (opt_value)
511 pfree(opt_value);
512
513 /* report the error */
514 if (token == GUC_EOL || token == 0)
515 {
516 ereport(elevel,
517 (errcode(ERRCODE_SYNTAX_ERROR),
518 errmsg("syntax error in file \"%s\" line %u, near end of line",
519 config_file, ConfigFileLineno - 1)));
520 record_config_file_error("syntax error",
521 config_file, ConfigFileLineno - 1,
522 head_p, tail_p);
523 }
524 else
525 {
526 ereport(elevel,
527 (errcode(ERRCODE_SYNTAX_ERROR),
528 errmsg("syntax error in file \"%s\" line %u, near token \"%s\"",
529 config_file, ConfigFileLineno, yytext)));
530 record_config_file_error("syntax error",
531 config_file, ConfigFileLineno,
532 head_p, tail_p);
533 }
534 OK = false;
535 errorcount++;
536
537 /*
538 * To avoid producing too much noise when fed a totally bogus file,
539 * give up after 100 syntax errors per file (an arbitrary number).
540 * Also, if we're only logging the errors at DEBUG level anyway, might
541 * as well give up immediately. (This prevents postmaster children
542 * from bloating the logs with duplicate complaints.)
543 */
544 if (errorcount >= 100 || elevel <= DEBUG1)
545 {
546 ereport(elevel,
547 (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
548 errmsg("too many syntax errors found, abandoning file \"%s\"",
549 config_file)));
550 break;
551 }
552
553 /* resync to next end-of-line or EOF */
554 while (token != GUC_EOL && token != 0)
555 token = yylex(scanner);
556 /* break out of loop on EOF */
557 if (token == 0)
558 break;
559 }
560
561cleanup:
562 yy_delete_buffer(lex_buffer, scanner);
563 yylex_destroy(scanner);
564 /* Each recursion level must save and restore these static variables. */
565 ConfigFileLineno = save_ConfigFileLineno;
566 GUC_flex_fatal_jmp = save_GUC_flex_fatal_jmp;
567 return OK;
568}
yyscan_t
void * yyscan_t
Definition: cubedata.h:65
DEBUG1
#define DEBUG1
Definition: elog.h:30
GUC_flex_fatal_jmp
static sigjmp_buf * GUC_flex_fatal_jmp
Definition: guc-file.l:50
yylex
int yylex(yyscan_t yyscanner)
Definition: guc-file.l:91
ConfigFileLineno
static unsigned int ConfigFileLineno
Definition: guc-file.l:48
GUC_flex_fatal_errmsg
static const char * GUC_flex_fatal_errmsg
Definition: guc-file.l:49
DeescapeQuotedString
char * DeescapeQuotedString(const char *s)
Definition: guc-file.l:661
GUC_STRING
@ GUC_STRING
Definition: guc-file.l:38
GUC_UNQUOTED_STRING
@ GUC_UNQUOTED_STRING
Definition: guc-file.l:42
GUC_INTEGER
@ GUC_INTEGER
Definition: guc-file.l:39
GUC_QUALIFIED_ID
@ GUC_QUALIFIED_ID
Definition: guc-file.l:43
GUC_REAL
@ GUC_REAL
Definition: guc-file.l:40
GUC_ID
@ GUC_ID
Definition: guc-file.l:37
GUC_EOL
@ GUC_EOL
Definition: guc-file.l:44
GUC_EQUALS
@ GUC_EQUALS
Definition: guc-file.l:41
ParseConfigDirectory
bool ParseConfigDirectory(const char *includedir, const char *calling_file, int calling_lineno, int depth, int elevel, ConfigVariable **head_p, ConfigVariable **tail_p)
Definition: guc-file.l:581
token
#define token
Definition: indent_globs.h:126
YY_BUFFER_STATE
struct yy_buffer_state * YY_BUFFER_STATE
Definition: psqlscan_int.h:54
ConfigVariable::name
char * name
Definition: guc.h:141
ConfigVariable::ignore
bool ignore
Definition: guc.h:146
ConfigVariable::applied
bool applied
Definition: guc.h:147
ConfigVariable::filename
char * filename
Definition: guc.h:144
ConfigVariable::sourceline
int sourceline
Definition: guc.h:145
ConfigVariable::value
char * value
Definition: guc.h:142
ConfigVariable::errmsg
char * errmsg
Definition: guc.h:143
yyguts_t
Definition: pl_scanner.c:141

References ConfigVariable::applied, cleanup(), config_file, ConfigFileLineno, DEBUG1, DeescapeQuotedString(), elog, ereport, errcode(), errmsg(), ConfigVariable::errmsg, ConfigVariable::filename, GUC_EOL, GUC_EQUALS, GUC_flex_fatal_errmsg, GUC_flex_fatal_jmp, GUC_ID, GUC_INTEGER, guc_name_compare(), GUC_QUALIFIED_ID, GUC_REAL, GUC_STRING, GUC_UNQUOTED_STRING, ConfigVariable::ignore, ConfigVariable::name, ConfigVariable::next, palloc(), ParseConfigDirectory(), ParseConfigFile(), pfree(), pstrdup(), record_config_file_error(), ConfigVariable::sourceline, token, ConfigVariable::value, and yylex().

Referenced by AlterSystemSetConfigFile(), parse_extension_control_file(), and ParseConfigFile().

◆ ParseLongOption()

void ParseLongOption ( const char *  string,
char **  name,
char **  value 
)

Definition at line 6205 of file guc.c.

6206{
6207 size_t equal_pos;
6208
6209 Assert(string);
6210 Assert(name);
6211 Assert(value);
6212
6213 equal_pos = strcspn(string, "=");
6214
6215 if (string[equal_pos] == '=')
6216 {
6217 *name = palloc(equal_pos + 1);
6218 strlcpy(*name, string, equal_pos + 1);
6219
6220 *value = pstrdup(&string[equal_pos + 1]);
6221 }
6222 else
6223 {
6224 /* no equal sign in string */
6225 *name = pstrdup(string);
6226 *value = NULL;
6227 }
6228
6229 for (char *cp = *name; *cp; cp++)
6230 if (*cp == '-')
6231 *cp = '_';
6232}
strlcpy
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45

References Assert(), name, palloc(), pstrdup(), strlcpy(), and value.

Referenced by BootstrapModeMain(), PostmasterMain(), process_postgres_switches(), and TransformGUCArray().

◆ ProcessConfigFile()

void ProcessConfigFile ( GucContext  context)

Definition at line 120 of file guc-file.l.

121{
122 int elevel;
123 MemoryContext config_cxt;
124 MemoryContext caller_cxt;
125
126 /*
127 * Config files are processed on startup (by the postmaster only) and on
128 * SIGHUP (by the postmaster and its children)
129 */
130 Assert((context == PGC_POSTMASTER && !IsUnderPostmaster) ||
131 context == PGC_SIGHUP);
132
133 /*
134 * To avoid cluttering the log, only the postmaster bleats loudly about
135 * problems with the config file.
136 */
137 elevel = IsUnderPostmaster ? DEBUG2 : LOG;
138
139 /*
140 * This function is usually called within a process-lifespan memory
141 * context. To ensure that any memory leaked during GUC processing does
142 * not accumulate across repeated SIGHUP cycles, do the work in a private
143 * context that we can free at exit.
144 */
145 config_cxt = AllocSetContextCreate(CurrentMemoryContext,
146 "config file processing",
147 ALLOCSET_DEFAULT_SIZES);
148 caller_cxt = MemoryContextSwitchTo(config_cxt);
149
150 /*
151 * Read and apply the config file. We don't need to examine the result.
152 */
153 (void) ProcessConfigFileInternal(context, true, elevel);
154
155 /* Clean up */
156 MemoryContextSwitchTo(caller_cxt);
157 MemoryContextDelete(config_cxt);
158}
DEBUG2
#define DEBUG2
Definition: elog.h:29
IsUnderPostmaster
bool IsUnderPostmaster
Definition: globals.c:120
ProcessConfigFileInternal
ConfigVariable * ProcessConfigFileInternal(GucContext context, bool applySettings, int elevel)
Definition: guc.c:284
CurrentMemoryContext
MemoryContext CurrentMemoryContext
Definition: mcxt.c:160
MemoryContextDelete
void MemoryContextDelete(MemoryContext context)
Definition: mcxt.c:469
AllocSetContextCreate
#define AllocSetContextCreate
Definition: memutils.h:129
ALLOCSET_DEFAULT_SIZES
#define ALLOCSET_DEFAULT_SIZES
Definition: memutils.h:160

References ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate, Assert(), CurrentMemoryContext, DEBUG2, IsUnderPostmaster, LOG, MemoryContextDelete(), MemoryContextSwitchTo(), PGC_POSTMASTER, PGC_SIGHUP, and ProcessConfigFileInternal().

Referenced by ApplyLauncherMain(), autoprewarm_main(), CheckpointWriteDelay(), copy_sequences(), do_autovacuum(), IoWorkerMain(), LogicalRepApplyLoop(), PostgresMain(), process_pm_reload_request(), ProcessAutoVacLauncherInterrupts(), ProcessCheckpointerInterrupts(), ProcessMainLoopInterrupts(), ProcessParallelApplyInterrupts(), ProcessPendingWrites(), ProcessPgArchInterrupts(), ProcessWalSummarizerInterrupts(), SelectConfigFiles(), slotsync_reread_config(), StartupRereadConfig(), SysLoggerMain(), vacuum_delay_point(), WaitForStandbyConfirmation(), WalReceiverMain(), WalSndLoop(), WalSndWaitForWal(), and worker_spi_main().

◆ ProcessGUCArray()

void ProcessGUCArray ( ArrayType *  array,
GucContext  context,
GucSource  source,
GucAction  action 
)

Definition at line 6296 of file guc.c.

6298{
6299 List *gucNames;
6300 List *gucValues;
6301 ListCell *lc1;
6302 ListCell *lc2;
6303
6304 TransformGUCArray(array, &gucNames, &gucValues);
6305 forboth(lc1, gucNames, lc2, gucValues)
6306 {
6307 char *name = lfirst(lc1);
6308 char *value = lfirst(lc2);
6309
6310 (void) set_config_option(name, value,
6311 context, source,
6312 action, true, 0, false);
6313
6314 pfree(name);
6315 pfree(value);
6316 }
6317
6318 list_free(gucNames);
6319 list_free(gucValues);
6320}
TransformGUCArray
void TransformGUCArray(ArrayType *array, List **names, List **values)
Definition: guc.c:6241
list_free
void list_free(List *list)
Definition: list.c:1546
forboth
#define forboth(cell1, list1, cell2, list2)
Definition: pg_list.h:518
source
static rewind_source * source
Definition: pg_rewind.c:89
List
Definition: pg_list.h:54

References generate_unaccent_rules::action, forboth, lfirst, list_free(), name, pfree(), set_config_option(), source, TransformGUCArray(), and value.

Referenced by ApplySetting(), and ProcedureCreate().

◆ ReportChangedGUCOptions()

void ReportChangedGUCOptions ( void  )

Definition at line 2471 of file guc.c.

2472{
2473 slist_mutable_iter iter;
2474
2475 /* Quick exit if not (yet) enabled */
2476 if (!reporting_enabled)
2477 return;
2478
2479 /*
2480 * Since in_hot_standby isn't actually changed by normal GUC actions, we
2481 * need a hack to check whether a new value needs to be reported to the
2482 * client. For speed, we rely on the assumption that it can never
2483 * transition from false to true.
2484 */
2485 if (in_hot_standby_guc && !RecoveryInProgress())
2486 SetConfigOption("in_hot_standby", "false",
2487 PGC_INTERNAL, PGC_S_OVERRIDE);
2488
2489 /* Transmit new values of interesting variables */
2490 slist_foreach_modify(iter, &guc_report_list)
2491 {
2492 struct config_generic *conf = slist_container(struct config_generic,
2493 report_link, iter.cur);
2494
2495 Assert((conf->flags & GUC_REPORT) && (conf->status & GUC_NEEDS_REPORT));
2496 ReportGUCOption(conf);
2497 conf->status &= ~GUC_NEEDS_REPORT;
2498 slist_delete_current(&iter);
2499 }
2500}
in_hot_standby_guc
bool in_hot_standby_guc
Definition: guc_tables.c:647

References Assert(), slist_mutable_iter::cur, config_generic::flags, GUC_NEEDS_REPORT, GUC_REPORT, guc_report_list, in_hot_standby_guc, PGC_INTERNAL, PGC_S_OVERRIDE, RecoveryInProgress(), config_generic::report_link, ReportGUCOption(), reporting_enabled, SetConfigOption(), slist_container, slist_delete_current(), slist_foreach_modify, and config_generic::status.

Referenced by PostgresMain().

◆ ResetAllOptions()

void ResetAllOptions ( void  )

Definition at line 1878 of file guc.c.

1879{
1880 dlist_mutable_iter iter;
1881
1882 /* We need only consider GUCs not already at PGC_S_DEFAULT */
1883 dlist_foreach_modify(iter, &guc_nondef_list)
1884 {
1885 struct config_generic *gconf = dlist_container(struct config_generic,
1886 nondef_link, iter.cur);
1887
1888 /* Don't reset non-SET-able values */
1889 if (gconf->context != PGC_SUSET &&
1890 gconf->context != PGC_USERSET)
1891 continue;
1892 /* Don't reset if special exclusion from RESET ALL */
1893 if (gconf->flags & GUC_NO_RESET_ALL)
1894 continue;
1895 /* No need to reset if wasn't SET */
1896 if (gconf->source <= PGC_S_OVERRIDE)
1897 continue;
1898
1899 /* Save old value to support transaction abort */
1900 push_old_value(gconf, GUC_ACTION_SET);
1901
1902 switch (gconf->vartype)
1903 {
1904 case PGC_BOOL:
1905 {
1906 struct config_bool *conf = &gconf->_bool;
1907
1908 if (conf->assign_hook)
1909 conf->assign_hook(conf->reset_val,
1910 gconf->reset_extra);
1911 *conf->variable = conf->reset_val;
1912 set_extra_field(gconf, &gconf->extra,
1913 gconf->reset_extra);
1914 break;
1915 }
1916 case PGC_INT:
1917 {
1918 struct config_int *conf = &gconf->_int;
1919
1920 if (conf->assign_hook)
1921 conf->assign_hook(conf->reset_val,
1922 gconf->reset_extra);
1923 *conf->variable = conf->reset_val;
1924 set_extra_field(gconf, &gconf->extra,
1925 gconf->reset_extra);
1926 break;
1927 }
1928 case PGC_REAL:
1929 {
1930 struct config_real *conf = &gconf->_real;
1931
1932 if (conf->assign_hook)
1933 conf->assign_hook(conf->reset_val,
1934 gconf->reset_extra);
1935 *conf->variable = conf->reset_val;
1936 set_extra_field(gconf, &gconf->extra,
1937 gconf->reset_extra);
1938 break;
1939 }
1940 case PGC_STRING:
1941 {
1942 struct config_string *conf = &gconf->_string;
1943
1944 if (conf->assign_hook)
1945 conf->assign_hook(conf->reset_val,
1946 gconf->reset_extra);
1947 set_string_field(gconf, conf->variable, conf->reset_val);
1948 set_extra_field(gconf, &gconf->extra,
1949 gconf->reset_extra);
1950 break;
1951 }
1952 case PGC_ENUM:
1953 {
1954 struct config_enum *conf = &gconf->_enum;
1955
1956 if (conf->assign_hook)
1957 conf->assign_hook(conf->reset_val,
1958 gconf->reset_extra);
1959 *conf->variable = conf->reset_val;
1960 set_extra_field(gconf, &gconf->extra,
1961 gconf->reset_extra);
1962 break;
1963 }
1964 }
1965
1966 set_guc_source(gconf, gconf->reset_source);
1967 gconf->scontext = gconf->reset_scontext;
1968 gconf->srole = gconf->reset_srole;
1969
1970 if ((gconf->flags & GUC_REPORT) && !(gconf->status & GUC_NEEDS_REPORT))
1971 {
1972 gconf->status |= GUC_NEEDS_REPORT;
1973 slist_push_head(&guc_report_list, &gconf->report_link);
1974 }
1975 }
1976}
push_old_value
static void push_old_value(struct config_generic *gconf, GucAction action)
Definition: guc.c:2009
GUC_NO_RESET_ALL
#define GUC_NO_RESET_ALL
Definition: guc.h:218
dlist_foreach_modify
#define dlist_foreach_modify(iter, lhead)
Definition: ilist.h:640
config_generic::reset_scontext
GucContext reset_scontext
Definition: guc_tables.h:264
config_generic::reset_srole
Oid reset_srole
Definition: guc_tables.h:266
config_generic::source
GucSource source
Definition: guc_tables.h:261
config_generic::reset_extra
void * reset_extra
Definition: guc_tables.h:269
config_generic::reset_source
GucSource reset_source
Definition: guc_tables.h:262
dlist_mutable_iter
Definition: ilist.h:199
dlist_mutable_iter::cur
dlist_node * cur
Definition: ilist.h:200

References config_generic::_bool, config_generic::_enum, config_generic::_int, config_generic::_real, config_generic::_string, config_bool::assign_hook, config_int::assign_hook, config_real::assign_hook, config_string::assign_hook, config_enum::assign_hook, config_generic::context, dlist_mutable_iter::cur, dlist_container, dlist_foreach_modify, config_generic::extra, config_generic::flags, GUC_ACTION_SET, GUC_NEEDS_REPORT, GUC_NO_RESET_ALL, guc_nondef_list, GUC_REPORT, guc_report_list, config_generic::nondef_link, PGC_BOOL, PGC_ENUM, PGC_INT, PGC_REAL, PGC_S_OVERRIDE, PGC_STRING, PGC_SUSET, PGC_USERSET, push_old_value(), config_generic::report_link, config_generic::reset_extra, config_generic::reset_scontext, config_generic::reset_source, config_generic::reset_srole, config_bool::reset_val, config_int::reset_val, config_real::reset_val, config_string::reset_val, config_enum::reset_val, config_generic::scontext, set_extra_field(), set_guc_source(), set_string_field(), slist_push_head(), config_generic::source, config_generic::srole, config_generic::status, config_bool::variable, config_int::variable, config_real::variable, config_string::variable, config_enum::variable, and config_generic::vartype.

Referenced by DiscardAll(), and ExecSetVariableStmt().

◆ RestoreGUCState()

void RestoreGUCState ( void *  gucstate)

Definition at line 6062 of file guc.c.

6063{
6064 char *varname,
6065 *varvalue,
6066 *varsourcefile;
6067 int varsourceline;
6068 GucSource varsource;
6069 GucContext varscontext;
6070 Oid varsrole;
6071 char *srcptr = (char *) gucstate;
6072 char *srcend;
6073 Size len;
6074 dlist_mutable_iter iter;
6075 ErrorContextCallback error_context_callback;
6076
6077 /*
6078 * First, ensure that all potentially-shippable GUCs are reset to their
6079 * default values. We must not touch those GUCs that the leader will
6080 * never ship, while there is no need to touch those that are shippable
6081 * but already have their default values. Thus, this ends up being the
6082 * same test that SerializeGUCState uses, even though the sets of
6083 * variables involved may well be different since the leader's set of
6084 * variables-not-at-default-values can differ from the set that are
6085 * not-default in this freshly started worker.
6086 *
6087 * Once we have set all the potentially-shippable GUCs to default values,
6088 * restoring the GUCs that the leader sent (because they had non-default
6089 * values over there) leads us to exactly the set of GUC values that the
6090 * leader has. This is true even though the worker may have initially
6091 * absorbed postgresql.conf settings that the leader hasn't yet seen, or
6092 * ALTER USER/DATABASE SET settings that were established after the leader
6093 * started.
6094 *
6095 * Note that ensuring all the potential target GUCs are at PGC_S_DEFAULT
6096 * also ensures that set_config_option won't refuse to set them because of
6097 * source-priority comparisons.
6098 */
6099 dlist_foreach_modify(iter, &guc_nondef_list)
6100 {
6101 struct config_generic *gconf = dlist_container(struct config_generic,
6102 nondef_link, iter.cur);
6103
6104 /* Do nothing if non-shippable or if already at PGC_S_DEFAULT. */
6105 if (can_skip_gucvar(gconf))
6106 continue;
6107
6108 /*
6109 * We can use InitializeOneGUCOption to reset the GUC to default, but
6110 * first we must free any existing subsidiary data to avoid leaking
6111 * memory. The stack must be empty, but we have to clean up all other
6112 * fields. Beware that there might be duplicate value or "extra"
6113 * pointers. We also have to be sure to take it out of any lists it's
6114 * in.
6115 */
6116 Assert(gconf->stack == NULL);
6117 guc_free(gconf->extra);
6118 guc_free(gconf->last_reported);
6119 guc_free(gconf->sourcefile);
6120 switch (gconf->vartype)
6121 {
6122 case PGC_BOOL:
6123 case PGC_INT:
6124 case PGC_REAL:
6125 case PGC_ENUM:
6126 /* no need to do anything */
6127 break;
6128 case PGC_STRING:
6129 {
6130 struct config_string *conf = &gconf->_string;
6131
6132 guc_free(*conf->variable);
6133 if (conf->reset_val && conf->reset_val != *conf->variable)
6134 guc_free(conf->reset_val);
6135 break;
6136 }
6137 }
6138 if (gconf->reset_extra && gconf->reset_extra != gconf->extra)
6139 guc_free(gconf->reset_extra);
6140 /* Remove it from any lists it's in. */
6141 RemoveGUCFromLists(gconf);
6142 /* Now we can reset the struct to PGS_S_DEFAULT state. */
6143 InitializeOneGUCOption(gconf);
6144 }
6145
6146 /* First item is the length of the subsequent data */
6147 memcpy(&len, gucstate, sizeof(len));
6148
6149 srcptr += sizeof(len);
6150 srcend = srcptr + len;
6151
6152 /* If the GUC value check fails, we want errors to show useful context. */
6153 error_context_callback.callback = guc_restore_error_context_callback;
6154 error_context_callback.previous = error_context_stack;
6155 error_context_callback.arg = NULL;
6156 error_context_stack = &error_context_callback;
6157
6158 /* Restore all the listed GUCs. */
6159 while (srcptr < srcend)
6160 {
6161 int result;
6162 char *error_context_name_and_value[2];
6163
6164 varname = read_gucstate(&srcptr, srcend);
6165 varvalue = read_gucstate(&srcptr, srcend);
6166 varsourcefile = read_gucstate(&srcptr, srcend);
6167 if (varsourcefile[0])
6168 read_gucstate_binary(&srcptr, srcend,
6169 &varsourceline, sizeof(varsourceline));
6170 else
6171 varsourceline = 0;
6172 read_gucstate_binary(&srcptr, srcend,
6173 &varsource, sizeof(varsource));
6174 read_gucstate_binary(&srcptr, srcend,
6175 &varscontext, sizeof(varscontext));
6176 read_gucstate_binary(&srcptr, srcend,
6177 &varsrole, sizeof(varsrole));
6178
6179 error_context_name_and_value[0] = varname;
6180 error_context_name_and_value[1] = varvalue;
6181 error_context_callback.arg = &error_context_name_and_value[0];
6182 result = set_config_option_ext(varname, varvalue,
6183 varscontext, varsource, varsrole,
6184 GUC_ACTION_SET, true, ERROR, true);
6185 if (result <= 0)
6186 ereport(ERROR,
6187 (errcode(ERRCODE_INTERNAL_ERROR),
6188 errmsg("parameter \"%s\" could not be set", varname)));
6189 if (varsourcefile[0])
6190 set_config_sourcefile(varname, varsourcefile, varsourceline);
6191 error_context_callback.arg = NULL;
6192 }
6193
6194 error_context_stack = error_context_callback.previous;
6195}
error_context_stack
ErrorContextCallback * error_context_stack
Definition: elog.c:95
guc_restore_error_context_callback
static void guc_restore_error_context_callback(void *arg)
Definition: guc.c:6040
set_config_option_ext
int set_config_option_ext(const char *name, const char *value, GucContext context, GucSource source, Oid srole, GucAction action, bool changeVal, int elevel, bool is_reload)
Definition: guc.c:3256
set_config_sourcefile
static void set_config_sourcefile(const char *name, char *sourcefile, int sourceline)
Definition: guc.c:4163
can_skip_gucvar
static bool can_skip_gucvar(struct config_generic *gconf)
Definition: guc.c:5683
read_gucstate_binary
static void read_gucstate_binary(char **srcptr, char *srcend, void *dest, Size size)
Definition: guc.c:6026
read_gucstate
static char * read_gucstate(char **srcptr, char *srcend)
Definition: guc.c:6003
ErrorContextCallback::previous
struct ErrorContextCallback * previous
Definition: elog.h:297
ErrorContextCallback::callback
void(* callback)(void *arg)
Definition: elog.h:298
config_generic::last_reported
char * last_reported
Definition: guc_tables.h:276
config_generic::sourcefile
char * sourcefile
Definition: guc_tables.h:278

References config_generic::_string, ErrorContextCallback::arg, Assert(), ErrorContextCallback::callback, can_skip_gucvar(), dlist_mutable_iter::cur, dlist_container, dlist_foreach_modify, ereport, errcode(), errmsg(), ERROR, error_context_stack, config_generic::extra, GUC_ACTION_SET, guc_free(), guc_nondef_list, guc_restore_error_context_callback(), InitializeOneGUCOption(), config_generic::last_reported, len, config_generic::nondef_link, PGC_BOOL, PGC_ENUM, PGC_INT, PGC_REAL, PGC_STRING, ErrorContextCallback::previous, read_gucstate(), read_gucstate_binary(), RemoveGUCFromLists(), config_generic::reset_extra, config_string::reset_val, set_config_option_ext(), set_config_sourcefile(), config_generic::sourcefile, config_generic::stack, config_string::variable, and config_generic::vartype.

Referenced by ParallelWorkerMain().

◆ RestrictSearchPath()

void RestrictSearchPath ( void  )

Definition at line 2121 of file guc.c.

2122{
2123 if (!IsBootstrapProcessingMode())
2124 set_config_option("search_path", GUC_SAFE_SEARCH_PATH, PGC_USERSET,
2125 PGC_S_SESSION, GUC_ACTION_SAVE, true, 0, false);
2126}
GUC_SAFE_SEARCH_PATH
#define GUC_SAFE_SEARCH_PATH
Definition: guc.c:75
IsBootstrapProcessingMode
#define IsBootstrapProcessingMode()
Definition: miscadmin.h:477

References GUC_ACTION_SAVE, GUC_SAFE_SEARCH_PATH, IsBootstrapProcessingMode, PGC_S_SESSION, PGC_USERSET, and set_config_option().

Referenced by brin_summarize_range(), cluster_rel(), ComputeIndexAttrs(), DefineIndex(), do_analyze_rel(), index_build(), index_concurrently_build(), RefreshMatViewByOid(), reindex_index(), ReindexRelationConcurrently(), vacuum_rel(), and validate_index().

◆ SelectConfigFiles()

bool SelectConfigFiles ( const char *  userDoption,
const char *  progname 
)

Definition at line 1655 of file guc.c.

1656{
1657 char *configdir;
1658 char *fname;
1659 bool fname_is_malloced;
1660 struct stat stat_buf;
1661 struct config_generic *data_directory_rec;
1662
1663 /* configdir is -D option, or $PGDATA if no -D */
1664 if (userDoption)
1665 configdir = make_absolute_path(userDoption);
1666 else
1667 configdir = make_absolute_path(getenv("PGDATA"));
1668
1669 if (configdir && stat(configdir, &stat_buf) != 0)
1670 {
1671 write_stderr("%s: could not access directory \"%s\": %m\n",
1672 progname,
1673 configdir);
1674 if (errno == ENOENT)
1675 write_stderr("Run initdb or pg_basebackup to initialize a PostgreSQL data directory.\n");
1676 goto fail;
1677 }
1678
1679 /*
1680 * Find the configuration file: if config_file was specified on the
1681 * command line, use it, else use configdir/postgresql.conf. In any case
1682 * ensure the result is an absolute path, so that it will be interpreted
1683 * the same way by future backends.
1684 */
1685 if (ConfigFileName)
1686 {
1687 fname = make_absolute_path(ConfigFileName);
1688 fname_is_malloced = true;
1689 }
1690 else if (configdir)
1691 {
1692 fname = guc_malloc(FATAL,
1693 strlen(configdir) + strlen(CONFIG_FILENAME) + 2);
1694 sprintf(fname, "%s/%s", configdir, CONFIG_FILENAME);
1695 fname_is_malloced = false;
1696 }
1697 else
1698 {
1699 write_stderr("%s does not know where to find the server configuration file.\n"
1700 "You must specify the --config-file or -D invocation "
1701 "option or set the PGDATA environment variable.\n",
1702 progname);
1703 goto fail;
1704 }
1705
1706 /*
1707 * Set the ConfigFileName GUC variable to its final value, ensuring that
1708 * it can't be overridden later.
1709 */
1710 SetConfigOption("config_file", fname, PGC_POSTMASTER, PGC_S_OVERRIDE);
1711
1712 if (fname_is_malloced)
1713 free(fname);
1714 else
1715 guc_free(fname);
1716
1717 /*
1718 * Now read the config file for the first time.
1719 */
1720 if (stat(ConfigFileName, &stat_buf) != 0)
1721 {
1722 write_stderr("%s: could not access the server configuration file \"%s\": %m\n",
1723 progname, ConfigFileName);
1724 goto fail;
1725 }
1726
1727 /*
1728 * Read the configuration file for the first time. This time only the
1729 * data_directory parameter is picked up to determine the data directory,
1730 * so that we can read the PG_AUTOCONF_FILENAME file next time.
1731 */
1732 ProcessConfigFile(PGC_POSTMASTER);
1733
1734 /*
1735 * If the data_directory GUC variable has been set, use that as DataDir;
1736 * otherwise use configdir if set; else punt.
1737 *
1738 * Note: SetDataDir will copy and absolute-ize its argument, so we don't
1739 * have to.
1740 */
1741 data_directory_rec =
1742 find_option("data_directory", false, false, PANIC);
1743 if (*data_directory_rec->_string.variable)
1744 SetDataDir(*data_directory_rec->_string.variable);
1745 else if (configdir)
1746 SetDataDir(configdir);
1747 else
1748 {
1749 write_stderr("%s does not know where to find the database system data.\n"
1750 "This can be specified as \"data_directory\" in \"%s\", "
1751 "or by the -D invocation option, or by the "
1752 "PGDATA environment variable.\n",
1753 progname, ConfigFileName);
1754 goto fail;
1755 }
1756
1757 /*
1758 * Reflect the final DataDir value back into the data_directory GUC var.
1759 * (If you are wondering why we don't just make them a single variable,
1760 * it's because the EXEC_BACKEND case needs DataDir to be transmitted to
1761 * child backends specially. XXX is that still true? Given that we now
1762 * chdir to DataDir, EXEC_BACKEND can read the config file without knowing
1763 * DataDir in advance.)
1764 */
1765 SetConfigOption("data_directory", DataDir, PGC_POSTMASTER, PGC_S_OVERRIDE);
1766
1767 /*
1768 * Now read the config file a second time, allowing any settings in the
1769 * PG_AUTOCONF_FILENAME file to take effect. (This is pretty ugly, but
1770 * since we have to determine the DataDir before we can find the autoconf
1771 * file, the alternatives seem worse.)
1772 */
1773 ProcessConfigFile(PGC_POSTMASTER);
1774
1775 /*
1776 * If timezone_abbreviations wasn't set in the configuration file, install
1777 * the default value. We do it this way because we can't safely install a
1778 * "real" value until my_exec_path is set, which may not have happened
1779 * when InitializeGUCOptions runs, so the bootstrap default value cannot
1780 * be the real desired default.
1781 */
1782 pg_timezone_abbrev_initialize();
1783
1784 /*
1785 * Figure out where pg_hba.conf is, and make sure the path is absolute.
1786 */
1787 if (HbaFileName)
1788 {
1789 fname = make_absolute_path(HbaFileName);
1790 fname_is_malloced = true;
1791 }
1792 else if (configdir)
1793 {
1794 fname = guc_malloc(FATAL,
1795 strlen(configdir) + strlen(HBA_FILENAME) + 2);
1796 sprintf(fname, "%s/%s", configdir, HBA_FILENAME);
1797 fname_is_malloced = false;
1798 }
1799 else
1800 {
1801 write_stderr("%s does not know where to find the \"hba\" configuration file.\n"
1802 "This can be specified as \"hba_file\" in \"%s\", "
1803 "or by the -D invocation option, or by the "
1804 "PGDATA environment variable.\n",
1805 progname, ConfigFileName);
1806 goto fail;
1807 }
1808 SetConfigOption("hba_file", fname, PGC_POSTMASTER, PGC_S_OVERRIDE);
1809
1810 if (fname_is_malloced)
1811 free(fname);
1812 else
1813 guc_free(fname);
1814
1815 /*
1816 * Likewise for pg_ident.conf.
1817 */
1818 if (IdentFileName)
1819 {
1820 fname = make_absolute_path(IdentFileName);
1821 fname_is_malloced = true;
1822 }
1823 else if (configdir)
1824 {
1825 fname = guc_malloc(FATAL,
1826 strlen(configdir) + strlen(IDENT_FILENAME) + 2);
1827 sprintf(fname, "%s/%s", configdir, IDENT_FILENAME);
1828 fname_is_malloced = false;
1829 }
1830 else
1831 {
1832 write_stderr("%s does not know where to find the \"ident\" configuration file.\n"
1833 "This can be specified as \"ident_file\" in \"%s\", "
1834 "or by the -D invocation option, or by the "
1835 "PGDATA environment variable.\n",
1836 progname, ConfigFileName);
1837 goto fail;
1838 }
1839 SetConfigOption("ident_file", fname, PGC_POSTMASTER, PGC_S_OVERRIDE);
1840
1841 if (fname_is_malloced)
1842 free(fname);
1843 else
1844 guc_free(fname);
1845
1846 free(configdir);
1847
1848 return true;
1849
1850fail:
1851 free(configdir);
1852
1853 return false;
1854}
write_stderr
#define write_stderr(str)
Definition: parallel.c:186
FATAL
#define FATAL
Definition: elog.h:41
PANIC
#define PANIC
Definition: elog.h:42
DataDir
char * DataDir
Definition: globals.c:71
ProcessConfigFile
void ProcessConfigFile(GucContext context)
Definition: guc-file.l:120
pg_timezone_abbrev_initialize
static void pg_timezone_abbrev_initialize(void)
Definition: guc.c:1867
IDENT_FILENAME
#define IDENT_FILENAME
Definition: guc.c:58
HBA_FILENAME
#define HBA_FILENAME
Definition: guc.c:57
CONFIG_FILENAME
#define CONFIG_FILENAME
Definition: guc.c:56
HbaFileName
char * HbaFileName
Definition: guc_tables.c:557
ConfigFileName
char * ConfigFileName
Definition: guc_tables.c:556
IdentFileName
char * IdentFileName
Definition: guc_tables.c:558
free
#define free(a)
Definition: header.h:65
progname
const char * progname
Definition: main.c:44
SetDataDir
void SetDataDir(const char *dir)
Definition: miscinit.c:389
sprintf
#define sprintf
Definition: port.h:262
make_absolute_path
char * make_absolute_path(const char *path)
Definition: path.c:807
userDoption
static const char * userDoption
Definition: postgres.c:154

References config_generic::_string, CONFIG_FILENAME, ConfigFileName, DataDir, FATAL, find_option(), free, guc_free(), guc_malloc(), HBA_FILENAME, HbaFileName, IDENT_FILENAME, IdentFileName, make_absolute_path(), PANIC, pg_timezone_abbrev_initialize(), PGC_POSTMASTER, PGC_S_OVERRIDE, ProcessConfigFile(), progname, SetConfigOption(), SetDataDir(), sprintf, stat, userDoption, config_string::variable, and write_stderr.

Referenced by BootstrapModeMain(), PostgresSingleUserMain(), and PostmasterMain().

◆ SerializeGUCState()

void SerializeGUCState ( Size  maxsize,
char *  start_address 
)

Definition at line 5970 of file guc.c.

5971{
5972 char *curptr;
5973 Size actual_size;
5974 Size bytes_left;
5975 dlist_iter iter;
5976
5977 /* Reserve space for saving the actual size of the guc state */
5978 Assert(maxsize > sizeof(actual_size));
5979 curptr = start_address + sizeof(actual_size);
5980 bytes_left = maxsize - sizeof(actual_size);
5981
5982 /* We need only consider GUCs with source not PGC_S_DEFAULT */
5983 dlist_foreach(iter, &guc_nondef_list)
5984 {
5985 struct config_generic *gconf = dlist_container(struct config_generic,
5986 nondef_link, iter.cur);
5987
5988 serialize_variable(&curptr, &bytes_left, gconf);
5989 }
5990
5991 /* Store actual size without assuming alignment of start_address. */
5992 actual_size = maxsize - bytes_left - sizeof(actual_size);
5993 memcpy(start_address, &actual_size, sizeof(actual_size));
5994}
serialize_variable
static void serialize_variable(char **destptr, Size *maxbytes, struct config_generic *gconf)
Definition: guc.c:5893

References Assert(), dlist_iter::cur, dlist_container, dlist_foreach, guc_nondef_list, config_generic::nondef_link, and serialize_variable().

Referenced by InitializeParallelDSM().

◆ set_config_option()

int set_config_option ( const char *  name,
const char *  value,
GucContext  context,
GucSource  source,
GucAction  action,
bool  changeVal,
int  elevel,
bool  is_reload 
)

Definition at line 3216 of file guc.c.

3220{
3221 Oid srole;
3222
3223 /*
3224 * Non-interactive sources should be treated as having all privileges,
3225 * except for PGC_S_CLIENT. Note in particular that this is true for
3226 * pg_db_role_setting sources (PGC_S_GLOBAL etc): we assume a suitable
3227 * privilege check was done when the pg_db_role_setting entry was made.
3228 */
3229 if (source >= PGC_S_INTERACTIVE || source == PGC_S_CLIENT)
3230 srole = GetUserId();
3231 else
3232 srole = BOOTSTRAP_SUPERUSERID;
3233
3234 return set_config_with_handle(name, NULL, value,
3235 context, source, srole,
3236 action, changeVal, elevel,
3237 is_reload);
3238}
set_config_with_handle
int set_config_with_handle(const char *name, config_handle *handle, const char *value, GucContext context, GucSource source, Oid srole, GucAction action, bool changeVal, int elevel, bool is_reload)
Definition: guc.c:3279

References generate_unaccent_rules::action, GetUserId(), name, PGC_S_CLIENT, PGC_S_INTERACTIVE, set_config_with_handle(), source, and value.

Referenced by accept_weak_input(), applyRemoteGucs(), CreateSchemaCommand(), DefineIndex(), ExecSetVariableStmt(), execute_extension_script(), parse_subscription_options(), ProcessConfigFileInternal(), ProcessGUCArray(), RestrictSearchPath(), RI_Initial_Check(), RI_PartitionRemove_Check(), set_config_by_name(), set_transmission_modes(), SetConfigOption(), SetPGVariable(), and validate_option_array_item().

◆ set_config_option_ext()

int set_config_option_ext ( const char *  name,
const char *  value,
GucContext  context,
GucSource  source,
Oid  srole,
GucAction  action,
bool  changeVal,
int  elevel,
bool  is_reload 
)

Definition at line 3256 of file guc.c.

3260{
3261 return set_config_with_handle(name, NULL, value,
3262 context, source, srole,
3263 action, changeVal, elevel,
3264 is_reload);
3265}

References generate_unaccent_rules::action, name, set_config_with_handle(), source, and value.

Referenced by define_custom_variable(), execute_extension_script(), InitializeWalConsistencyChecking(), reapply_stacked_values(), and RestoreGUCState().

◆ set_config_with_handle()

int set_config_with_handle ( const char *  name,
config_handle *  handle,
const char *  value,
GucContext  context,
GucSource  source,
Oid  srole,
GucAction  action,
bool  changeVal,
int  elevel,
bool  is_reload 
)

Definition at line 3279 of file guc.c.

3284{
3285 struct config_generic *record;
3286 union config_var_val newval_union;
3287 void *newextra = NULL;
3288 bool prohibitValueChange = false;
3289 bool makeDefault;
3290
3291 if (elevel == 0)
3292 {
3293 if (source == PGC_S_DEFAULT || source == PGC_S_FILE)
3294 {
3295 /*
3296 * To avoid cluttering the log, only the postmaster bleats loudly
3297 * about problems with the config file.
3298 */
3299 elevel = IsUnderPostmaster ? DEBUG3 : LOG;
3300 }
3301 else if (source == PGC_S_GLOBAL ||
3302 source == PGC_S_DATABASE ||
3303 source == PGC_S_USER ||
3304 source == PGC_S_DATABASE_USER)
3305 elevel = WARNING;
3306 else
3307 elevel = ERROR;
3308 }
3309
3310 /* if handle is specified, no need to look up option */
3311 if (!handle)
3312 {
3313 record = find_option(name, true, false, elevel);
3314 if (record == NULL)
3315 return 0;
3316 }
3317 else
3318 record = handle;
3319
3320 /*
3321 * GUC_ACTION_SAVE changes are acceptable during a parallel operation,
3322 * because the current worker will also pop the change. We're probably
3323 * dealing with a function having a proconfig entry. Only the function's
3324 * body should observe the change, and peer workers do not share in the
3325 * execution of a function call started by this worker.
3326 *
3327 * Also allow normal setting if the GUC is marked GUC_ALLOW_IN_PARALLEL.
3328 *
3329 * Other changes might need to affect other workers, so forbid them.
3330 */
3331 if (IsInParallelMode() && changeVal && action != GUC_ACTION_SAVE &&
3332 (record->flags & GUC_ALLOW_IN_PARALLEL) == 0)
3333 {
3334 ereport(elevel,
3335 (errcode(ERRCODE_INVALID_TRANSACTION_STATE),
3336 errmsg("parameter \"%s\" cannot be set during a parallel operation",
3337 record->name)));
3338 return 0;
3339 }
3340
3341 /*
3342 * Check if the option can be set at this time. See guc.h for the precise
3343 * rules.
3344 */
3345 switch (record->context)
3346 {
3347 case PGC_INTERNAL:
3348 if (context != PGC_INTERNAL)
3349 {
3350 ereport(elevel,
3351 (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3352 errmsg("parameter \"%s\" cannot be changed",
3353 record->name)));
3354 return 0;
3355 }
3356 break;
3357 case PGC_POSTMASTER:
3358 if (context == PGC_SIGHUP)
3359 {
3360 /*
3361 * We are re-reading a PGC_POSTMASTER variable from
3362 * postgresql.conf. We can't change the setting, so we should
3363 * give a warning if the DBA tries to change it. However,
3364 * because of variant formats, canonicalization by check
3365 * hooks, etc, we can't just compare the given string directly
3366 * to what's stored. Set a flag to check below after we have
3367 * the final storable value.
3368 */
3369 prohibitValueChange = true;
3370 }
3371 else if (context != PGC_POSTMASTER)
3372 {
3373 ereport(elevel,
3374 (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3375 errmsg("parameter \"%s\" cannot be changed without restarting the server",
3376 record->name)));
3377 return 0;
3378 }
3379 break;
3380 case PGC_SIGHUP:
3381 if (context != PGC_SIGHUP && context != PGC_POSTMASTER)
3382 {
3383 ereport(elevel,
3384 (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3385 errmsg("parameter \"%s\" cannot be changed now",
3386 record->name)));
3387 return 0;
3388 }
3389
3390 /*
3391 * Hmm, the idea of the SIGHUP context is "ought to be global, but
3392 * can be changed after postmaster start". But there's nothing
3393 * that prevents a crafty administrator from sending SIGHUP
3394 * signals to individual backends only.
3395 */
3396 break;
3397 case PGC_SU_BACKEND:
3398 if (context == PGC_BACKEND)
3399 {
3400 /*
3401 * Check whether the requesting user has been granted
3402 * privilege to set this GUC.
3403 */
3404 AclResult aclresult;
3405
3406 aclresult = pg_parameter_aclcheck(record->name, srole, ACL_SET);
3407 if (aclresult != ACLCHECK_OK)
3408 {
3409 /* No granted privilege */
3410 ereport(elevel,
3411 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
3412 errmsg("permission denied to set parameter \"%s\"",
3413 record->name)));
3414 return 0;
3415 }
3416 }
3417 /* fall through to process the same as PGC_BACKEND */
3418 /* FALLTHROUGH */
3419 case PGC_BACKEND:
3420 if (context == PGC_SIGHUP)
3421 {
3422 /*
3423 * If a PGC_BACKEND or PGC_SU_BACKEND parameter is changed in
3424 * the config file, we want to accept the new value in the
3425 * postmaster (whence it will propagate to
3426 * subsequently-started backends), but ignore it in existing
3427 * backends. This is a tad klugy, but necessary because we
3428 * don't re-read the config file during backend start.
3429 *
3430 * However, if changeVal is false then plow ahead anyway since
3431 * we are trying to find out if the value is potentially good,
3432 * not actually use it.
3433 *
3434 * In EXEC_BACKEND builds, this works differently: we load all
3435 * non-default settings from the CONFIG_EXEC_PARAMS file
3436 * during backend start. In that case we must accept
3437 * PGC_SIGHUP settings, so as to have the same value as if
3438 * we'd forked from the postmaster. This can also happen when
3439 * using RestoreGUCState() within a background worker that
3440 * needs to have the same settings as the user backend that
3441 * started it. is_reload will be true when either situation
3442 * applies.
3443 */
3444 if (IsUnderPostmaster && changeVal && !is_reload)
3445 return -1;
3446 }
3447 else if (context != PGC_POSTMASTER &&
3448 context != PGC_BACKEND &&
3449 context != PGC_SU_BACKEND &&
3450 source != PGC_S_CLIENT)
3451 {
3452 ereport(elevel,
3453 (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3454 errmsg("parameter \"%s\" cannot be set after connection start",
3455 record->name)));
3456 return 0;
3457 }
3458 break;
3459 case PGC_SUSET:
3460 if (context == PGC_USERSET || context == PGC_BACKEND)
3461 {
3462 /*
3463 * Check whether the requesting user has been granted
3464 * privilege to set this GUC.
3465 */
3466 AclResult aclresult;
3467
3468 aclresult = pg_parameter_aclcheck(record->name, srole, ACL_SET);
3469 if (aclresult != ACLCHECK_OK)
3470 {
3471 /* No granted privilege */
3472 ereport(elevel,
3473 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
3474 errmsg("permission denied to set parameter \"%s\"",
3475 record->name)));
3476 return 0;
3477 }
3478 }
3479 break;
3480 case PGC_USERSET:
3481 /* always okay */
3482 break;
3483 }
3484
3485 /*
3486 * Disallow changing GUC_NOT_WHILE_SEC_REST values if we are inside a
3487 * security restriction context. We can reject this regardless of the GUC
3488 * context or source, mainly because sources that it might be reasonable
3489 * to override for won't be seen while inside a function.
3490 *
3491 * Note: variables marked GUC_NOT_WHILE_SEC_REST should usually be marked
3492 * GUC_NO_RESET_ALL as well, because ResetAllOptions() doesn't check this.
3493 * An exception might be made if the reset value is assumed to be "safe".
3494 *
3495 * Note: this flag is currently used for "session_authorization" and
3496 * "role". We need to prohibit changing these inside a local userid
3497 * context because when we exit it, GUC won't be notified, leaving things
3498 * out of sync. (This could be fixed by forcing a new GUC nesting level,
3499 * but that would change behavior in possibly-undesirable ways.) Also, we
3500 * prohibit changing these in a security-restricted operation because
3501 * otherwise RESET could be used to regain the session user's privileges.
3502 */
3503 if (record->flags & GUC_NOT_WHILE_SEC_REST)
3504 {
3505 if (InLocalUserIdChange())
3506 {
3507 /*
3508 * Phrasing of this error message is historical, but it's the most
3509 * common case.
3510 */
3511 ereport(elevel,
3512 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
3513 errmsg("cannot set parameter \"%s\" within security-definer function",
3514 record->name)));
3515 return 0;
3516 }
3517 if (InSecurityRestrictedOperation())
3518 {
3519 ereport(elevel,
3520 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
3521 errmsg("cannot set parameter \"%s\" within security-restricted operation",
3522 record->name)));
3523 return 0;
3524 }
3525 }
3526
3527 /* Disallow resetting and saving GUC_NO_RESET values */
3528 if (record->flags & GUC_NO_RESET)
3529 {
3530 if (value == NULL)
3531 {
3532 ereport(elevel,
3533 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3534 errmsg("parameter \"%s\" cannot be reset", record->name)));
3535 return 0;
3536 }
3537 if (action == GUC_ACTION_SAVE)
3538 {
3539 ereport(elevel,
3540 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3541 errmsg("parameter \"%s\" cannot be set locally in functions",
3542 record->name)));
3543 return 0;
3544 }
3545 }
3546
3547 /*
3548 * Should we set reset/stacked values? (If so, the behavior is not
3549 * transactional.) This is done either when we get a default value from
3550 * the database's/user's/client's default settings or when we reset a
3551 * value to its default.
3552 */
3553 makeDefault = changeVal && (source <= PGC_S_OVERRIDE) &&
3554 ((value != NULL) || source == PGC_S_DEFAULT);
3555
3556 /*
3557 * Ignore attempted set if overridden by previously processed setting.
3558 * However, if changeVal is false then plow ahead anyway since we are
3559 * trying to find out if the value is potentially good, not actually use
3560 * it. Also keep going if makeDefault is true, since we may want to set
3561 * the reset/stacked values even if we can't set the variable itself.
3562 */
3563 if (record->source > source)
3564 {
3565 if (changeVal && !makeDefault)
3566 {
3567 elog(DEBUG3, "\"%s\": setting ignored because previous source is higher priority",
3568 record->name);
3569 return -1;
3570 }
3571 changeVal = false;
3572 }
3573
3574 /*
3575 * Evaluate value and set variable.
3576 */
3577 switch (record->vartype)
3578 {
3579 case PGC_BOOL:
3580 {
3581 struct config_bool *conf = &record->_bool;
3582
3583#define newval (newval_union.boolval)
3584
3585 if (value)
3586 {
3587 if (!parse_and_validate_value(record, value,
3588 source, elevel,
3589 &newval_union, &newextra))
3590 return 0;
3591 }
3592 else if (source == PGC_S_DEFAULT)
3593 {
3594 newval = conf->boot_val;
3595 if (!call_bool_check_hook(record, &newval, &newextra,
3596 source, elevel))
3597 return 0;
3598 }
3599 else
3600 {
3601 newval = conf->reset_val;
3602 newextra = record->reset_extra;
3603 source = record->reset_source;
3604 context = record->reset_scontext;
3605 srole = record->reset_srole;
3606 }
3607
3608 if (prohibitValueChange)
3609 {
3610 /* Release newextra, unless it's reset_extra */
3611 if (newextra && !extra_field_used(record, newextra))
3612 guc_free(newextra);
3613
3614 if (*conf->variable != newval)
3615 {
3616 record->status |= GUC_PENDING_RESTART;
3617 ereport(elevel,
3618 (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3619 errmsg("parameter \"%s\" cannot be changed without restarting the server",
3620 record->name)));
3621 return 0;
3622 }
3623 record->status &= ~GUC_PENDING_RESTART;
3624 return -1;
3625 }
3626
3627 if (changeVal)
3628 {
3629 /* Save old value to support transaction abort */
3630 if (!makeDefault)
3631 push_old_value(record, action);
3632
3633 if (conf->assign_hook)
3634 conf->assign_hook(newval, newextra);
3635 *conf->variable = newval;
3636 set_extra_field(record, &record->extra,
3637 newextra);
3638 set_guc_source(record, source);
3639 record->scontext = context;
3640 record->srole = srole;
3641 }
3642 if (makeDefault)
3643 {
3644 if (record->reset_source <= source)
3645 {
3646 conf->reset_val = newval;
3647 set_extra_field(record, &record->reset_extra,
3648 newextra);
3649 record->reset_source = source;
3650 record->reset_scontext = context;
3651 record->reset_srole = srole;
3652 }
3653 for (GucStack *stack = record->stack; stack; stack = stack->prev)
3654 {
3655 if (stack->source <= source)
3656 {
3657 stack->prior.val.boolval = newval;
3658 set_extra_field(record, &stack->prior.extra,
3659 newextra);
3660 stack->source = source;
3661 stack->scontext = context;
3662 stack->srole = srole;
3663 }
3664 }
3665 }
3666
3667 /* Perhaps we didn't install newextra anywhere */
3668 if (newextra && !extra_field_used(record, newextra))
3669 guc_free(newextra);
3670 break;
3671
3672#undef newval
3673 }
3674
3675 case PGC_INT:
3676 {
3677 struct config_int *conf = &record->_int;
3678
3679#define newval (newval_union.intval)
3680
3681 if (value)
3682 {
3683 if (!parse_and_validate_value(record, value,
3684 source, elevel,
3685 &newval_union, &newextra))
3686 return 0;
3687 }
3688 else if (source == PGC_S_DEFAULT)
3689 {
3690 newval = conf->boot_val;
3691 if (!call_int_check_hook(record, &newval, &newextra,
3692 source, elevel))
3693 return 0;
3694 }
3695 else
3696 {
3697 newval = conf->reset_val;
3698 newextra = record->reset_extra;
3699 source = record->reset_source;
3700 context = record->reset_scontext;
3701 srole = record->reset_srole;
3702 }
3703
3704 if (prohibitValueChange)
3705 {
3706 /* Release newextra, unless it's reset_extra */
3707 if (newextra && !extra_field_used(record, newextra))
3708 guc_free(newextra);
3709
3710 if (*conf->variable != newval)
3711 {
3712 record->status |= GUC_PENDING_RESTART;
3713 ereport(elevel,
3714 (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3715 errmsg("parameter \"%s\" cannot be changed without restarting the server",
3716 record->name)));
3717 return 0;
3718 }
3719 record->status &= ~GUC_PENDING_RESTART;
3720 return -1;
3721 }
3722
3723 if (changeVal)
3724 {
3725 /* Save old value to support transaction abort */
3726 if (!makeDefault)
3727 push_old_value(record, action);
3728
3729 if (conf->assign_hook)
3730 conf->assign_hook(newval, newextra);
3731 *conf->variable = newval;
3732 set_extra_field(record, &record->extra,
3733 newextra);
3734 set_guc_source(record, source);
3735 record->scontext = context;
3736 record->srole = srole;
3737 }
3738 if (makeDefault)
3739 {
3740 if (record->reset_source <= source)
3741 {
3742 conf->reset_val = newval;
3743 set_extra_field(record, &record->reset_extra,
3744 newextra);
3745 record->reset_source = source;
3746 record->reset_scontext = context;
3747 record->reset_srole = srole;
3748 }
3749 for (GucStack *stack = record->stack; stack; stack = stack->prev)
3750 {
3751 if (stack->source <= source)
3752 {
3753 stack->prior.val.intval = newval;
3754 set_extra_field(record, &stack->prior.extra,
3755 newextra);
3756 stack->source = source;
3757 stack->scontext = context;
3758 stack->srole = srole;
3759 }
3760 }
3761 }
3762
3763 /* Perhaps we didn't install newextra anywhere */
3764 if (newextra && !extra_field_used(record, newextra))
3765 guc_free(newextra);
3766 break;
3767
3768#undef newval
3769 }
3770
3771 case PGC_REAL:
3772 {
3773 struct config_real *conf = &record->_real;
3774
3775#define newval (newval_union.realval)
3776
3777 if (value)
3778 {
3779 if (!parse_and_validate_value(record, value,
3780 source, elevel,
3781 &newval_union, &newextra))
3782 return 0;
3783 }
3784 else if (source == PGC_S_DEFAULT)
3785 {
3786 newval = conf->boot_val;
3787 if (!call_real_check_hook(record, &newval, &newextra,
3788 source, elevel))
3789 return 0;
3790 }
3791 else
3792 {
3793 newval = conf->reset_val;
3794 newextra = record->reset_extra;
3795 source = record->reset_source;
3796 context = record->reset_scontext;
3797 srole = record->reset_srole;
3798 }
3799
3800 if (prohibitValueChange)
3801 {
3802 /* Release newextra, unless it's reset_extra */
3803 if (newextra && !extra_field_used(record, newextra))
3804 guc_free(newextra);
3805
3806 if (*conf->variable != newval)
3807 {
3808 record->status |= GUC_PENDING_RESTART;
3809 ereport(elevel,
3810 (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3811 errmsg("parameter \"%s\" cannot be changed without restarting the server",
3812 record->name)));
3813 return 0;
3814 }
3815 record->status &= ~GUC_PENDING_RESTART;
3816 return -1;
3817 }
3818
3819 if (changeVal)
3820 {
3821 /* Save old value to support transaction abort */
3822 if (!makeDefault)
3823 push_old_value(record, action);
3824
3825 if (conf->assign_hook)
3826 conf->assign_hook(newval, newextra);
3827 *conf->variable = newval;
3828 set_extra_field(record, &record->extra,
3829 newextra);
3830 set_guc_source(record, source);
3831 record->scontext = context;
3832 record->srole = srole;
3833 }
3834 if (makeDefault)
3835 {
3836 if (record->reset_source <= source)
3837 {
3838 conf->reset_val = newval;
3839 set_extra_field(record, &record->reset_extra,
3840 newextra);
3841 record->reset_source = source;
3842 record->reset_scontext = context;
3843 record->reset_srole = srole;
3844 }
3845 for (GucStack *stack = record->stack; stack; stack = stack->prev)
3846 {
3847 if (stack->source <= source)
3848 {
3849 stack->prior.val.realval = newval;
3850 set_extra_field(record, &stack->prior.extra,
3851 newextra);
3852 stack->source = source;
3853 stack->scontext = context;
3854 stack->srole = srole;
3855 }
3856 }
3857 }
3858
3859 /* Perhaps we didn't install newextra anywhere */
3860 if (newextra && !extra_field_used(record, newextra))
3861 guc_free(newextra);
3862 break;
3863
3864#undef newval
3865 }
3866
3867 case PGC_STRING:
3868 {
3869 struct config_string *conf = &record->_string;
3870 GucContext orig_context = context;
3871 GucSource orig_source = source;
3872 Oid orig_srole = srole;
3873
3874#define newval (newval_union.stringval)
3875
3876 if (value)
3877 {
3878 if (!parse_and_validate_value(record, value,
3879 source, elevel,
3880 &newval_union, &newextra))
3881 return 0;
3882 }
3883 else if (source == PGC_S_DEFAULT)
3884 {
3885 /* non-NULL boot_val must always get strdup'd */
3886 if (conf->boot_val != NULL)
3887 {
3888 newval = guc_strdup(elevel, conf->boot_val);
3889 if (newval == NULL)
3890 return 0;
3891 }
3892 else
3893 newval = NULL;
3894
3895 if (!call_string_check_hook(record, &newval, &newextra,
3896 source, elevel))
3897 {
3898 guc_free(newval);
3899 return 0;
3900 }
3901 }
3902 else
3903 {
3904 /*
3905 * strdup not needed, since reset_val is already under
3906 * guc.c's control
3907 */
3908 newval = conf->reset_val;
3909 newextra = record->reset_extra;
3910 source = record->reset_source;
3911 context = record->reset_scontext;
3912 srole = record->reset_srole;
3913 }
3914
3915 if (prohibitValueChange)
3916 {
3917 bool newval_different;
3918
3919 /* newval shouldn't be NULL, so we're a bit sloppy here */
3920 newval_different = (*conf->variable == NULL ||
3921 newval == NULL ||
3922 strcmp(*conf->variable, newval) != 0);
3923
3924 /* Release newval, unless it's reset_val */
3925 if (newval && !string_field_used(record, newval))
3926 guc_free(newval);
3927 /* Release newextra, unless it's reset_extra */
3928 if (newextra && !extra_field_used(record, newextra))
3929 guc_free(newextra);
3930
3931 if (newval_different)
3932 {
3933 record->status |= GUC_PENDING_RESTART;
3934 ereport(elevel,
3935 (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3936 errmsg("parameter \"%s\" cannot be changed without restarting the server",
3937 record->name)));
3938 return 0;
3939 }
3940 record->status &= ~GUC_PENDING_RESTART;
3941 return -1;
3942 }
3943
3944 if (changeVal)
3945 {
3946 /* Save old value to support transaction abort */
3947 if (!makeDefault)
3948 push_old_value(record, action);
3949
3950 if (conf->assign_hook)
3951 conf->assign_hook(newval, newextra);
3952 set_string_field(record, conf->variable, newval);
3953 set_extra_field(record, &record->extra,
3954 newextra);
3955 set_guc_source(record, source);
3956 record->scontext = context;
3957 record->srole = srole;
3958
3959 /*
3960 * Ugly hack: during SET session_authorization, forcibly
3961 * do SET ROLE NONE with the same context/source/etc, so
3962 * that the effects will have identical lifespan. This is
3963 * required by the SQL spec, and it's not possible to do
3964 * it within the variable's check hook or assign hook
3965 * because our APIs for those don't pass enough info.
3966 * However, don't do it if is_reload: in that case we
3967 * expect that if "role" isn't supposed to be default, it
3968 * has been or will be set by a separate reload action.
3969 *
3970 * Also, for the call from InitializeSessionUserId with
3971 * source == PGC_S_OVERRIDE, use PGC_S_DYNAMIC_DEFAULT for
3972 * "role"'s source, so that it's still possible to set
3973 * "role" from pg_db_role_setting entries. (See notes in
3974 * InitializeSessionUserId before changing this.)
3975 *
3976 * A fine point: for RESET session_authorization, we do
3977 * "RESET role" not "SET ROLE NONE" (by passing down NULL
3978 * rather than "none" for the value). This would have the
3979 * same effects in typical cases, but if the reset value
3980 * of "role" is not "none" it seems better to revert to
3981 * that.
3982 */
3983 if (!is_reload &&
3984 strcmp(record->name, "session_authorization") == 0)
3985 (void) set_config_with_handle("role", NULL,
3986 value ? "none" : NULL,
3987 orig_context,
3988 (orig_source == PGC_S_OVERRIDE)
3989 ? PGC_S_DYNAMIC_DEFAULT
3990 : orig_source,
3991 orig_srole,
3992 action,
3993 true,
3994 elevel,
3995 false);
3996 }
3997
3998 if (makeDefault)
3999 {
4000 if (record->reset_source <= source)
4001 {
4002 set_string_field(record, &conf->reset_val, newval);
4003 set_extra_field(record, &record->reset_extra,
4004 newextra);
4005 record->reset_source = source;
4006 record->reset_scontext = context;
4007 record->reset_srole = srole;
4008 }
4009 for (GucStack *stack = record->stack; stack; stack = stack->prev)
4010 {
4011 if (stack->source <= source)
4012 {
4013 set_string_field(record, &stack->prior.val.stringval,
4014 newval);
4015 set_extra_field(record, &stack->prior.extra,
4016 newextra);
4017 stack->source = source;
4018 stack->scontext = context;
4019 stack->srole = srole;
4020 }
4021 }
4022 }
4023
4024 /* Perhaps we didn't install newval anywhere */
4025 if (newval && !string_field_used(record, newval))
4026 guc_free(newval);
4027 /* Perhaps we didn't install newextra anywhere */
4028 if (newextra && !extra_field_used(record, newextra))
4029 guc_free(newextra);
4030 break;
4031
4032#undef newval
4033 }
4034
4035 case PGC_ENUM:
4036 {
4037 struct config_enum *conf = &record->_enum;
4038
4039#define newval (newval_union.enumval)
4040
4041 if (value)
4042 {
4043 if (!parse_and_validate_value(record, value,
4044 source, elevel,
4045 &newval_union, &newextra))
4046 return 0;
4047 }
4048 else if (source == PGC_S_DEFAULT)
4049 {
4050 newval = conf->boot_val;
4051 if (!call_enum_check_hook(record, &newval, &newextra,
4052 source, elevel))
4053 return 0;
4054 }
4055 else
4056 {
4057 newval = conf->reset_val;
4058 newextra = record->reset_extra;
4059 source = record->reset_source;
4060 context = record->reset_scontext;
4061 srole = record->reset_srole;
4062 }
4063
4064 if (prohibitValueChange)
4065 {
4066 /* Release newextra, unless it's reset_extra */
4067 if (newextra && !extra_field_used(record, newextra))
4068 guc_free(newextra);
4069
4070 if (*conf->variable != newval)
4071 {
4072 record->status |= GUC_PENDING_RESTART;
4073 ereport(elevel,
4074 (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
4075 errmsg("parameter \"%s\" cannot be changed without restarting the server",
4076 record->name)));
4077 return 0;
4078 }
4079 record->status &= ~GUC_PENDING_RESTART;
4080 return -1;
4081 }
4082
4083 if (changeVal)
4084 {
4085 /* Save old value to support transaction abort */
4086 if (!makeDefault)
4087 push_old_value(record, action);
4088
4089 if (conf->assign_hook)
4090 conf->assign_hook(newval, newextra);
4091 *conf->variable = newval;
4092 set_extra_field(record, &record->extra,
4093 newextra);
4094 set_guc_source(record, source);
4095 record->scontext = context;
4096 record->srole = srole;
4097 }
4098 if (makeDefault)
4099 {
4100 if (record->reset_source <= source)
4101 {
4102 conf->reset_val = newval;
4103 set_extra_field(record, &record->reset_extra,
4104 newextra);
4105 record->reset_source = source;
4106 record->reset_scontext = context;
4107 record->reset_srole = srole;
4108 }
4109 for (GucStack *stack = record->stack; stack; stack = stack->prev)
4110 {
4111 if (stack->source <= source)
4112 {
4113 stack->prior.val.enumval = newval;
4114 set_extra_field(record, &stack->prior.extra,
4115 newextra);
4116 stack->source = source;
4117 stack->scontext = context;
4118 stack->srole = srole;
4119 }
4120 }
4121 }
4122
4123 /* Perhaps we didn't install newextra anywhere */
4124 if (newextra && !extra_field_used(record, newextra))
4125 guc_free(newextra);
4126 break;
4127
4128#undef newval
4129 }
4130 }
4131
4132 if (changeVal && (record->flags & GUC_REPORT) &&
4133 !(record->status & GUC_NEEDS_REPORT))
4134 {
4135 record->status |= GUC_NEEDS_REPORT;
4136 slist_push_head(&guc_report_list, &record->report_link);
4137 }
4138
4139 return changeVal ? 1 : -1;
4140}
DEBUG3
#define DEBUG3
Definition: elog.h:28
call_real_check_hook
static bool call_real_check_hook(const struct config_generic *conf, double *newval, void **extra, GucSource source, int elevel)
Definition: guc.c:6709
call_enum_check_hook
static bool call_enum_check_hook(const struct config_generic *conf, int *newval, void **extra, GucSource source, int elevel)
Definition: guc.c:6793
call_int_check_hook
static bool call_int_check_hook(const struct config_generic *conf, int *newval, void **extra, GucSource source, int elevel)
Definition: guc.c:6675
extra_field_used
static bool extra_field_used(struct config_generic *gconf, void *extra)
Definition: guc.c:743
call_bool_check_hook
static void static bool call_bool_check_hook(const struct config_generic *conf, bool *newval, void **extra, GucSource source, int elevel)
Definition: guc.c:6641
guc_strdup
char * guc_strdup(int elevel, const char *src)
Definition: guc.c:675
string_field_used
static bool string_field_used(struct config_generic *conf, char *strval)
Definition: guc.c:706
call_string_check_hook
static bool call_string_check_hook(const struct config_generic *conf, char **newval, void **extra, GucSource source, int elevel)
Definition: guc.c:6743
GUC_NO_RESET
#define GUC_NO_RESET
Definition: guc.h:217
GUC_NOT_WHILE_SEC_REST
#define GUC_NOT_WHILE_SEC_REST
Definition: guc.h:226
GUC_ALLOW_IN_PARALLEL
#define GUC_ALLOW_IN_PARALLEL
Definition: guc.h:230
GUC_PENDING_RESTART
#define GUC_PENDING_RESTART
Definition: guc_tables.h:299
InSecurityRestrictedOperation
bool InSecurityRestrictedOperation(void)
Definition: miscinit.c:639
InLocalUserIdChange
bool InLocalUserIdChange(void)
Definition: miscinit.c:630
config_bool::boot_val
bool boot_val
Definition: guc_tables.h:142
config_enum::boot_val
int boot_val
Definition: guc_tables.h:204
config_int::boot_val
int boot_val
Definition: guc_tables.h:154
config_real::boot_val
double boot_val
Definition: guc_tables.h:168
config_string::boot_val
const char * boot_val
Definition: guc_tables.h:192

References config_generic::_bool, config_generic::_enum, config_generic::_int, config_generic::_real, config_generic::_string, ACL_SET, ACLCHECK_OK, generate_unaccent_rules::action, config_bool::assign_hook, config_int::assign_hook, config_real::assign_hook, config_string::assign_hook, config_enum::assign_hook, config_bool::boot_val, config_int::boot_val, config_real::boot_val, config_string::boot_val, config_enum::boot_val, call_bool_check_hook(), call_enum_check_hook(), call_int_check_hook(), call_real_check_hook(), call_string_check_hook(), config_generic::context, DEBUG3, elog, ereport, errcode(), errmsg(), ERROR, config_generic::extra, extra_field_used(), find_option(), config_generic::flags, GUC_ACTION_SAVE, GUC_ALLOW_IN_PARALLEL, guc_free(), GUC_NEEDS_REPORT, GUC_NO_RESET, GUC_NOT_WHILE_SEC_REST, GUC_PENDING_RESTART, GUC_REPORT, guc_report_list, guc_strdup(), InLocalUserIdChange(), InSecurityRestrictedOperation(), IsInParallelMode(), IsUnderPostmaster, LOG, name, config_generic::name, newval, parse_and_validate_value(), pg_parameter_aclcheck(), PGC_BACKEND, PGC_BOOL, PGC_ENUM, PGC_INT, PGC_INTERNAL, PGC_POSTMASTER, PGC_REAL, PGC_S_CLIENT, PGC_S_DATABASE, PGC_S_DATABASE_USER, PGC_S_DEFAULT, PGC_S_DYNAMIC_DEFAULT, PGC_S_FILE, PGC_S_GLOBAL, PGC_S_OVERRIDE, PGC_S_USER, PGC_SIGHUP, PGC_STRING, PGC_SU_BACKEND, PGC_SUSET, PGC_USERSET, guc_stack::prev, push_old_value(), config_generic::report_link, config_generic::reset_extra, config_generic::reset_scontext, config_generic::reset_source, config_generic::reset_srole, config_bool::reset_val, config_int::reset_val, config_real::reset_val, config_string::reset_val, config_enum::reset_val, config_generic::scontext, set_config_with_handle(), set_extra_field(), set_guc_source(), set_string_field(), slist_push_head(), source, config_generic::source, config_generic::srole, config_generic::stack, config_generic::status, string_field_used(), value, config_bool::variable, config_int::variable, config_real::variable, config_string::variable, config_enum::variable, config_generic::vartype, and WARNING.

Referenced by fmgr_security_definer(), set_config_option(), set_config_option_ext(), and set_config_with_handle().

◆ SetConfigOption()

void SetConfigOption ( const char *  name,
const char *  value,
GucContext  context,
GucSource  source 
)

Definition at line 4196 of file guc.c.

4198{
4199 (void) set_config_option(name, value, context, source,
4200 GUC_ACTION_SET, true, 0, false);
4201}

References config_generic::context, GUC_ACTION_SET, name, set_config_option(), source, and value.

Referenced by AioShmemSize(), AutoVacLauncherMain(), AutoVacWorkerMain(), BeginReportingGUCOptions(), BootstrapModeMain(), CheckMyDatabase(), CLOGShmemInit(), CommitTsShmemInit(), CreateAnonymousSegment(), InitializeGUCOptions(), InitializeGUCOptionsFromEnvironment(), InitializeLogRepWorker(), InitializeSessionUserId(), InitializeShmemGUCs(), maybe_reread_subscription(), pg_timezone_abbrev_initialize(), PGSharedMemoryCreate(), PostmasterMain(), process_postgres_switches(), process_startup_options(), ProcessConfigFileInternal(), ReadControlFile(), ReplSlotSyncWorkerMain(), ReportChangedGUCOptions(), SelectConfigFiles(), set_debug_options(), set_limit(), set_plan_disabling_options(), SetOuterUserId(), SUBTRANSShmemInit(), and XLOGShmemSize().

◆ SetPGVariable()

void SetPGVariable ( const char *  name,
List *  args,
bool  is_local 
)

Definition at line 341 of file guc_funcs.c.

342{
343 char *argstring = flatten_set_variable_args(name, args);
344
345 /* Note SET DEFAULT (argstring == NULL) is equivalent to RESET */
346 (void) set_config_option(name,
347 argstring,
348 (superuser() ? PGC_SUSET : PGC_USERSET),
349 PGC_S_SESSION,
350 is_local ? GUC_ACTION_LOCAL : GUC_ACTION_SET,
351 true, 0, false);
352}
generate_unaccent_rules.args
args
Definition: generate_unaccent_rules.py:288

References generate_unaccent_rules::args, flatten_set_variable_args(), GUC_ACTION_LOCAL, GUC_ACTION_SET, name, PGC_S_SESSION, PGC_SUSET, PGC_USERSET, set_config_option(), and superuser().

Referenced by DiscardAll(), ExecSetVariableStmt(), and standard_ProcessUtility().

◆ TransformGUCArray()

void TransformGUCArray ( ArrayType *  array,
List **  names,
List **  values 
)

Definition at line 6241 of file guc.c.

6242{
6243 Assert(array != NULL);
6244 Assert(ARR_ELEMTYPE(array) == TEXTOID);
6245 Assert(ARR_NDIM(array) == 1);
6246 Assert(ARR_LBOUND(array)[0] == 1);
6247
6248 *names = NIL;
6249 *values = NIL;
6250 for (int i = 1; i <= ARR_DIMS(array)[0]; i++)
6251 {
6252 Datum d;
6253 bool isnull;
6254 char *s;
6255 char *name;
6256 char *value;
6257
6258 d = array_ref(array, 1, &i,
6259 -1 /* varlenarray */ ,
6260 -1 /* TEXT's typlen */ ,
6261 false /* TEXT's typbyval */ ,
6262 TYPALIGN_INT /* TEXT's typalign */ ,
6263 &isnull);
6264
6265 if (isnull)
6266 continue;
6267
6268 s = TextDatumGetCString(d);
6269
6270 ParseLongOption(s, &name, &value);
6271 if (!value)
6272 {
6273 ereport(WARNING,
6274 (errcode(ERRCODE_SYNTAX_ERROR),
6275 errmsg("could not parse setting for parameter \"%s\"",
6276 name)));
6277 pfree(name);
6278 continue;
6279 }
6280
6281 *names = lappend(*names, name);
6282 *values = lappend(*values, value);
6283
6284 pfree(s);
6285 }
6286}
values
static Datum values[MAXATTR]
Definition: bootstrap.c:153
ParseLongOption
void ParseLongOption(const char *string, char **name, char **value)
Definition: guc.c:6205
NIL
#define NIL
Definition: pg_list.h:68

References ARR_DIMS, ARR_ELEMTYPE, ARR_LBOUND, ARR_NDIM, array_ref(), Assert(), ereport, errcode(), errmsg(), i, lappend(), name, NIL, ParseLongOption(), pfree(), TextDatumGetCString, value, values, and WARNING.

Referenced by fmgr_security_definer(), and ProcessGUCArray().

Variable Documentation

◆ AllowAlterSystem

PGDLLIMPORT bool AllowAlterSystem
extern

Definition at line 506 of file guc_tables.c.

Referenced by AlterSystemSetConfigFile().

◆ application_name

PGDLLIMPORT char* application_name
extern

Definition at line 561 of file guc_tables.c.

Referenced by log_status_format(), pgstat_bestart_final(), process_pgfdw_appname(), SyncRepGetStandbyPriority(), SyncRepInitConfig(), SyncRepReleaseWaiters(), WalSndLoop(), write_csvlog(), and write_jsonlog().

◆ archive_mode_options

PGDLLIMPORT const struct config_enum_entry archive_mode_options[]
extern

Definition at line 193 of file xlog.c.

◆ backtrace_functions

PGDLLIMPORT char* backtrace_functions
extern

Definition at line 549 of file guc_tables.c.

Referenced by errfinish().

◆ check_function_bodies

PGDLLIMPORT bool check_function_bodies
extern

Definition at line 529 of file guc_tables.c.

Referenced by execute_extension_script(), fmgr_sql_validator(), plperl_validator(), plpgsql_compile_inline(), plpgsql_validator(), plpython3_validator(), and ProcedureCreate().

◆ client_min_messages

PGDLLIMPORT int client_min_messages
extern

Definition at line 541 of file guc_tables.c.

Referenced by execute_extension_script(), and should_output_to_client().

◆ cluster_name

PGDLLIMPORT char* cluster_name
extern

Definition at line 555 of file guc_tables.c.

Referenced by init_ps_display(), pg_sync_replication_slots(), process_pgfdw_appname(), ReplSlotSyncWorkerMain(), and WalReceiverMain().

◆ ConfigFileName

PGDLLIMPORT char* ConfigFileName
extern

Definition at line 556 of file guc_tables.c.

Referenced by ProcessConfigFileInternal(), and SelectConfigFiles().

◆ current_role_is_superuser

PGDLLIMPORT bool current_role_is_superuser
extern

Definition at line 537 of file guc_tables.c.

Referenced by check_role(), and InitializeParallelDSM().

◆ Debug_pretty_print

PGDLLIMPORT bool Debug_pretty_print
extern

Definition at line 512 of file guc_tables.c.

Referenced by pg_parse_query(), pg_plan_query(), and pg_rewrite_query().

◆ Debug_print_parse

PGDLLIMPORT bool Debug_print_parse
extern

Definition at line 509 of file guc_tables.c.

Referenced by pg_rewrite_query().

◆ Debug_print_plan

PGDLLIMPORT bool Debug_print_plan
extern

Definition at line 508 of file guc_tables.c.

Referenced by pg_plan_query().

◆ Debug_print_raw_parse

PGDLLIMPORT bool Debug_print_raw_parse
extern

Definition at line 510 of file guc_tables.c.

Referenced by pg_parse_query().

◆ Debug_print_rewritten

PGDLLIMPORT bool Debug_print_rewritten
extern

Definition at line 511 of file guc_tables.c.

Referenced by pg_rewrite_query().

◆ dynamic_shared_memory_options

PGDLLIMPORT const struct config_enum_entry dynamic_shared_memory_options[]
extern

Definition at line 95 of file dsm_impl.c.

◆ event_source

PGDLLIMPORT char* event_source
extern

Definition at line 526 of file guc_tables.c.

◆ external_pid_file

PGDLLIMPORT char* external_pid_file
extern

Definition at line 559 of file guc_tables.c.

Referenced by PostmasterMain(), and unlink_external_pid_file().

◆ GUC_check_errdetail_string

PGDLLIMPORT char* GUC_check_errdetail_string
extern

Definition at line 83 of file guc.c.

Referenced by call_bool_check_hook(), call_enum_check_hook(), call_int_check_hook(), call_real_check_hook(), and call_string_check_hook().

◆ GUC_check_errhint_string

PGDLLIMPORT char* GUC_check_errhint_string
extern

Definition at line 84 of file guc.c.

Referenced by call_bool_check_hook(), call_enum_check_hook(), call_int_check_hook(), call_real_check_hook(), and call_string_check_hook().

◆ GUC_check_errmsg_string

PGDLLIMPORT char* GUC_check_errmsg_string
extern

Definition at line 82 of file guc.c.

Referenced by call_bool_check_hook(), call_enum_check_hook(), call_int_check_hook(), call_real_check_hook(), and call_string_check_hook().

◆ HbaFileName

PGDLLIMPORT char* HbaFileName
extern

Definition at line 557 of file guc_tables.c.

Referenced by fill_hba_view(), load_hba(), PerformAuthentication(), PostmasterMain(), process_pm_reload_request(), and SelectConfigFiles().

◆ IdentFileName

PGDLLIMPORT char* IdentFileName
extern

Definition at line 558 of file guc_tables.c.

Referenced by fill_ident_view(), load_ident(), process_pm_reload_request(), and SelectConfigFiles().

◆ in_hot_standby_guc

PGDLLIMPORT bool in_hot_standby_guc
extern

Definition at line 647 of file guc_tables.c.

Referenced by ReportChangedGUCOptions().

◆ io_method_options

PGDLLIMPORT const struct config_enum_entry io_method_options[]
extern

Definition at line 64 of file aio.c.

◆ log_btree_build_stats

PGDLLIMPORT bool log_btree_build_stats
extern

Definition at line 525 of file guc_tables.c.

Referenced by _bt_leader_participate_as_worker(), _bt_leafbuild(), _bt_parallel_build_main(), and btbuild().

◆ log_duration

PGDLLIMPORT bool log_duration
extern

Definition at line 507 of file guc_tables.c.

Referenced by check_log_duration().

◆ log_executor_stats

PGDLLIMPORT bool log_executor_stats
extern

Definition at line 522 of file guc_tables.c.

Referenced by check_log_stats(), PortalRun(), and PortalRunMulti().

◆ log_min_duration_sample

PGDLLIMPORT int log_min_duration_sample
extern

Definition at line 542 of file guc_tables.c.

Referenced by check_log_duration().

◆ log_min_duration_statement

PGDLLIMPORT int log_min_duration_statement
extern

Definition at line 543 of file guc_tables.c.

Referenced by check_log_duration().

◆ log_min_error_statement

PGDLLIMPORT int log_min_error_statement
extern

Definition at line 539 of file guc_tables.c.

Referenced by check_log_of_query().

◆ log_min_messages

PGDLLIMPORT int log_min_messages
extern

Definition at line 540 of file guc_tables.c.

Referenced by execute_extension_script(), and should_output_to_server().

◆ log_parameter_max_length

PGDLLIMPORT int log_parameter_max_length
extern

Definition at line 544 of file guc_tables.c.

Referenced by errdetail_params().

◆ log_parameter_max_length_on_error

PGDLLIMPORT int log_parameter_max_length_on_error
extern

Definition at line 545 of file guc_tables.c.

Referenced by bind_param_error_callback(), and exec_bind_message().

◆ log_parser_stats

PGDLLIMPORT bool log_parser_stats
extern

Definition at line 520 of file guc_tables.c.

Referenced by check_log_stats(), pg_analyze_and_rewrite_fixedparams(), pg_analyze_and_rewrite_varparams(), pg_analyze_and_rewrite_withcb(), pg_parse_query(), and pg_rewrite_query().

◆ log_planner_stats

PGDLLIMPORT bool log_planner_stats
extern

Definition at line 521 of file guc_tables.c.

Referenced by check_log_stats(), and pg_plan_query().

◆ log_statement_sample_rate

PGDLLIMPORT double log_statement_sample_rate
extern

Definition at line 547 of file guc_tables.c.

Referenced by check_log_duration().

◆ log_statement_stats

PGDLLIMPORT bool log_statement_stats
extern

Definition at line 523 of file guc_tables.c.

Referenced by check_stage_log_stats(), exec_bind_message(), exec_execute_message(), exec_parse_message(), and exec_simple_query().

◆ log_temp_files

PGDLLIMPORT int log_temp_files
extern

Definition at line 546 of file guc_tables.c.

Referenced by ReportTemporaryFileUsage().

◆ log_xact_sample_rate

PGDLLIMPORT double log_xact_sample_rate
extern

Definition at line 548 of file guc_tables.c.

Referenced by StartTransaction().

◆ num_temp_buffers

PGDLLIMPORT int num_temp_buffers
extern

Definition at line 553 of file guc_tables.c.

Referenced by GetAdditionalLocalPinLimit(), GetLocalPinLimit(), InitLocalBuffers(), and LimitAdditionalLocalPins().

◆ recovery_target_action_options

PGDLLIMPORT const struct config_enum_entry recovery_target_action_options[]
extern

Definition at line 77 of file xlogrecovery.c.

◆ role_string

PGDLLIMPORT char* role_string
extern

Definition at line 644 of file guc_tables.c.

Referenced by show_role().

◆ tcp_keepalives_count

PGDLLIMPORT int tcp_keepalives_count
extern

Definition at line 565 of file guc_tables.c.

Referenced by pq_init().

◆ tcp_keepalives_idle

PGDLLIMPORT int tcp_keepalives_idle
extern

Definition at line 563 of file guc_tables.c.

Referenced by pq_init().

◆ tcp_keepalives_interval

PGDLLIMPORT int tcp_keepalives_interval
extern

Definition at line 564 of file guc_tables.c.

Referenced by pq_init().

◆ tcp_user_timeout

PGDLLIMPORT int tcp_user_timeout
extern

Definition at line 566 of file guc_tables.c.

Referenced by pq_init().

◆ temp_file_limit

PGDLLIMPORT int temp_file_limit
extern

Definition at line 551 of file guc_tables.c.

Referenced by FileWriteV().

◆ trace_sort

PGDLLIMPORT bool trace_sort
extern

Definition at line 124 of file tuplesort.c.

Referenced by dumptuples(), inittapes(), macaddr_abbrev_abort(), mergeruns(), network_abbrev_abort(), numeric_abbrev_abort(), tuplesort_begin_cluster(), tuplesort_begin_common(), tuplesort_begin_datum(), tuplesort_begin_heap(), tuplesort_begin_index_brin(), tuplesort_begin_index_btree(), tuplesort_begin_index_gin(), tuplesort_begin_index_gist(), tuplesort_begin_index_hash(), tuplesort_free(), tuplesort_performsort(), tuplesort_puttuple_common(), uuid_abbrev_abort(), and varstr_abbrev_abort().

◆ wal_level_options

PGDLLIMPORT const struct config_enum_entry wal_level_options[]
extern

Definition at line 27 of file xlogdesc.c.

Referenced by get_wal_level_string().

◆ wal_sync_method_options

PGDLLIMPORT const struct config_enum_entry wal_sync_method_options[]
extern

Definition at line 173 of file xlog.c.