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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_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 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)
 
bool 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 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)
 
void AlterSystemSetConfigFile (AlterSystemStmt *altersysstmt)
 
char * GetConfigOptionByName (const char *name, const char **varname, bool missing_ok)
 
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_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 bool check_function_bodies
 
PGDLLIMPORT bool session_auth_is_superuser
 
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 * 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 358 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
pre_format_elog_string
void pre_format_elog_string(int errnumber, const char *domain)
Definition: elog.c:1627
format_elog_string
char * format_elog_string(const char *fmt,...)
Definition: elog.c:1636
TEXTDOMAIN
#define TEXTDOMAIN
Definition: elog.h:152

Definition at line 434 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 438 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 430 of file guc.h.

◆ GUC_CUSTOM_PLACEHOLDER

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

Definition at line 217 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 221 of file guc.h.

◆ GUC_DISALLOW_IN_FILE

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

Definition at line 216 of file guc.h.

◆ GUC_EXPLAIN

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

Definition at line 213 of file guc.h.

◆ GUC_IS_NAME

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

Definition at line 219 of file guc.h.

◆ GUC_LIST_INPUT

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

Definition at line 208 of file guc.h.

◆ GUC_LIST_QUOTE

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

Definition at line 209 of file guc.h.

◆ GUC_NO_RESET

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

Definition at line 211 of file guc.h.

◆ GUC_NO_RESET_ALL

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

Definition at line 212 of file guc.h.

◆ GUC_NO_SHOW_ALL

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

Definition at line 210 of file guc.h.

◆ GUC_NOT_IN_SAMPLE

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

Definition at line 215 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 220 of file guc.h.

◆ GUC_QUALIFIER_SEPARATOR

#define GUC_QUALIFIER_SEPARATOR   '.'

Definition at line 202 of file guc.h.

◆ GUC_REPORT

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

Definition at line 214 of file guc.h.

◆ GUC_RUNTIME_COMPUTED

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

Definition at line 223 of file guc.h.

◆ GUC_SUPERUSER_ONLY

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

Definition at line 218 of file guc.h.

◆ GUC_UNIT

#define GUC_UNIT   (GUC_UNIT_MEMORY | GUC_UNIT_TIME)

Definition at line 237 of file guc.h.

◆ GUC_UNIT_BLOCKS

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

Definition at line 226 of file guc.h.

◆ GUC_UNIT_BYTE

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

Definition at line 229 of file guc.h.

◆ GUC_UNIT_KB

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

Definition at line 225 of file guc.h.

◆ GUC_UNIT_MB

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

Definition at line 228 of file guc.h.

◆ GUC_UNIT_MEMORY

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

Definition at line 230 of file guc.h.

◆ GUC_UNIT_MIN

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

Definition at line 234 of file guc.h.

◆ GUC_UNIT_MS

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

Definition at line 232 of file guc.h.

◆ GUC_UNIT_S

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

Definition at line 233 of file guc.h.

◆ GUC_UNIT_TIME

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

Definition at line 235 of file guc.h.

◆ GUC_UNIT_XBLOCKS

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

Definition at line 227 of file guc.h.

◆ MAX_KILOBYTES

#define MAX_KILOBYTES   (INT_MAX / 1024)

Definition at line 25 of file guc.h.

◆ PG_AUTOCONF_FILENAME

#define PG_AUTOCONF_FILENAME   "postgresql.auto.conf"

Definition at line 33 of file guc.h.

Typedef Documentation

◆ ConfigVariable

typedef struct ConfigVariable ConfigVariable

◆ GucBoolAssignHook

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

Definition at line 183 of file guc.h.

◆ GucBoolCheckHook

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

Definition at line 177 of file guc.h.

◆ GucEnumAssignHook

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

Definition at line 187 of file guc.h.

◆ GucEnumCheckHook

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

Definition at line 181 of file guc.h.

◆ GucIntAssignHook

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

Definition at line 184 of file guc.h.

◆ GucIntCheckHook

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

Definition at line 178 of file guc.h.

◆ GucRealAssignHook

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

Definition at line 185 of file guc.h.

◆ GucRealCheckHook

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

Definition at line 179 of file guc.h.

◆ GucShowHook

typedef const char*(* GucShowHook) (void)

Definition at line 189 of file guc.h.

◆ GucStringAssignHook

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

Definition at line 186 of file guc.h.

◆ GucStringCheckHook

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

Definition at line 180 of file guc.h.

Enumeration Type Documentation

◆ GucAction

enum GucAction
Enumerator
GUC_ACTION_SET 
GUC_ACTION_LOCAL 
GUC_ACTION_SAVE 

Definition at line 194 of file guc.h.

195 {
196  /* Types of set_config_option actions */
197  GUC_ACTION_SET, /* regular SET command */
198  GUC_ACTION_LOCAL, /* SET LOCAL command */
199  GUC_ACTION_SAVE /* function SET option, or temp assignment */
200 } GucAction;
GucAction
GucAction
Definition: guc.h:195
GUC_ACTION_SAVE
@ GUC_ACTION_SAVE
Definition: guc.h:199
GUC_ACTION_SET
@ GUC_ACTION_SET
Definition: guc.h:197
GUC_ACTION_LOCAL
@ GUC_ACTION_LOCAL
Definition: guc.h:198

◆ GucContext

enum GucContext
Enumerator
PGC_INTERNAL 
PGC_POSTMASTER 
PGC_SIGHUP 
PGC_SU_BACKEND 
PGC_BACKEND 
PGC_SUSET 
PGC_USERSET 

Definition at line 67 of file guc.h.

68 {
69  PGC_INTERNAL,
70  PGC_POSTMASTER,
71  PGC_SIGHUP,
72  PGC_SU_BACKEND,
73  PGC_BACKEND,
74  PGC_SUSET,
75  PGC_USERSET
76 } GucContext;
GucContext
GucContext
Definition: guc.h:68
PGC_SUSET
@ PGC_SUSET
Definition: guc.h:74
PGC_INTERNAL
@ PGC_INTERNAL
Definition: guc.h:69
PGC_USERSET
@ PGC_USERSET
Definition: guc.h:75
PGC_SU_BACKEND
@ PGC_SU_BACKEND
Definition: guc.h:72
PGC_POSTMASTER
@ PGC_POSTMASTER
Definition: guc.h:70
PGC_SIGHUP
@ PGC_SIGHUP
Definition: guc.h:71
PGC_BACKEND
@ PGC_BACKEND
Definition: guc.h:73

◆ 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 107 of file guc.h.

108 {
109  PGC_S_DEFAULT, /* hard-wired default ("boot_val") */
110  PGC_S_DYNAMIC_DEFAULT, /* default computed during initialization */
111  PGC_S_ENV_VAR, /* postmaster environment variable */
112  PGC_S_FILE, /* postgresql.conf */
113  PGC_S_ARGV, /* postmaster command line */
114  PGC_S_GLOBAL, /* global in-database setting */
115  PGC_S_DATABASE, /* per-database setting */
116  PGC_S_USER, /* per-user setting */
117  PGC_S_DATABASE_USER, /* per-user-and-database setting */
118  PGC_S_CLIENT, /* from client connection request */
119  PGC_S_OVERRIDE, /* special case to forcibly set default */
120  PGC_S_INTERACTIVE, /* dividing line for error reporting */
121  PGC_S_TEST, /* test per-database or per-user setting */
122  PGC_S_SESSION /* SET command */
123 } GucSource;
GucSource
GucSource
Definition: guc.h:108
PGC_S_DEFAULT
@ PGC_S_DEFAULT
Definition: guc.h:109
PGC_S_DYNAMIC_DEFAULT
@ PGC_S_DYNAMIC_DEFAULT
Definition: guc.h:110
PGC_S_FILE
@ PGC_S_FILE
Definition: guc.h:112
PGC_S_GLOBAL
@ PGC_S_GLOBAL
Definition: guc.h:114
PGC_S_DATABASE
@ PGC_S_DATABASE
Definition: guc.h:115
PGC_S_OVERRIDE
@ PGC_S_OVERRIDE
Definition: guc.h:119
PGC_S_ARGV
@ PGC_S_ARGV
Definition: guc.h:113
PGC_S_SESSION
@ PGC_S_SESSION
Definition: guc.h:122
PGC_S_CLIENT
@ PGC_S_CLIENT
Definition: guc.h:118
PGC_S_DATABASE_USER
@ PGC_S_DATABASE_USER
Definition: guc.h:117
PGC_S_ENV_VAR
@ PGC_S_ENV_VAR
Definition: guc.h:111
PGC_S_USER
@ PGC_S_USER
Definition: guc.h:116
PGC_S_TEST
@ PGC_S_TEST
Definition: guc.h:121
PGC_S_INTERACTIVE
@ PGC_S_INTERACTIVE
Definition: guc.h:120

Function Documentation

◆ AlterSystemSetConfigFile()

void AlterSystemSetConfigFile ( AlterSystemStmt *  altersysstmt)

Definition at line 4450 of file guc.c.

4451 {
4452  char *name;
4453  char *value;
4454  bool resetall = false;
4455  ConfigVariable *head = NULL;
4456  ConfigVariable *tail = NULL;
4457  volatile int Tmpfd;
4458  char AutoConfFileName[MAXPGPATH];
4459  char AutoConfTmpFileName[MAXPGPATH];
4460 
4461  /*
4462  * Extract statement arguments
4463  */
4464  name = altersysstmt->setstmt->name;
4465 
4466  switch (altersysstmt->setstmt->kind)
4467  {
4468  case VAR_SET_VALUE:
4469  value = ExtractSetVariableArgs(altersysstmt->setstmt);
4470  break;
4471 
4472  case VAR_SET_DEFAULT:
4473  case VAR_RESET:
4474  value = NULL;
4475  break;
4476 
4477  case VAR_RESET_ALL:
4478  value = NULL;
4479  resetall = true;
4480  break;
4481 
4482  default:
4483  elog(ERROR, "unrecognized alter system stmt type: %d",
4484  altersysstmt->setstmt->kind);
4485  break;
4486  }
4487 
4488  /*
4489  * Check permission to run ALTER SYSTEM on the target variable
4490  */
4491  if (!superuser())
4492  {
4493  if (resetall)
4494  ereport(ERROR,
4495  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4496  errmsg("permission denied to perform ALTER SYSTEM RESET ALL")));
4497  else
4498  {
4499  AclResult aclresult;
4500 
4501  aclresult = pg_parameter_aclcheck(name, GetUserId(),
4502  ACL_ALTER_SYSTEM);
4503  if (aclresult != ACLCHECK_OK)
4504  ereport(ERROR,
4505  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4506  errmsg("permission denied to set parameter \"%s\"",
4507  name)));
4508  }
4509  }
4510 
4511  /*
4512  * Unless it's RESET_ALL, validate the target variable and value
4513  */
4514  if (!resetall)
4515  {
4516  struct config_generic *record;
4517 
4518  record = find_option(name, false, false, ERROR);
4519  Assert(record != NULL);
4520 
4521  /*
4522  * Don't allow parameters that can't be set in configuration files to
4523  * be set in PG_AUTOCONF_FILENAME file.
4524  */
4525  if ((record->context == PGC_INTERNAL) ||
4526  (record->flags & GUC_DISALLOW_IN_FILE) ||
4527  (record->flags & GUC_DISALLOW_IN_AUTO_FILE))
4528  ereport(ERROR,
4529  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
4530  errmsg("parameter \"%s\" cannot be changed",
4531  name)));
4532 
4533  /*
4534  * If a value is specified, verify that it's sane.
4535  */
4536  if (value)
4537  {
4538  union config_var_val newval;
4539  void *newextra = NULL;
4540 
4541  /* Check that it's acceptable for the indicated parameter */
4542  if (!parse_and_validate_value(record, name, value,
4543  PGC_S_FILE, ERROR,
4544  &newval, &newextra))
4545  ereport(ERROR,
4546  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4547  errmsg("invalid value for parameter \"%s\": \"%s\"",
4548  name, value)));
4549 
4550  if (record->vartype == PGC_STRING && newval.stringval != NULL)
4551  guc_free(newval.stringval);
4552  guc_free(newextra);
4553 
4554  /*
4555  * We must also reject values containing newlines, because the
4556  * grammar for config files doesn't support embedded newlines in
4557  * string literals.
4558  */
4559  if (strchr(value, '\n'))
4560  ereport(ERROR,
4561  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4562  errmsg("parameter value for ALTER SYSTEM must not contain a newline")));
4563  }
4564  }
4565 
4566  /*
4567  * PG_AUTOCONF_FILENAME and its corresponding temporary file are always in
4568  * the data directory, so we can reference them by simple relative paths.
4569  */
4570  snprintf(AutoConfFileName, sizeof(AutoConfFileName), "%s",
4571  PG_AUTOCONF_FILENAME);
4572  snprintf(AutoConfTmpFileName, sizeof(AutoConfTmpFileName), "%s.%s",
4573  AutoConfFileName,
4574  "tmp");
4575 
4576  /*
4577  * Only one backend is allowed to operate on PG_AUTOCONF_FILENAME at a
4578  * time. Use AutoFileLock to ensure that. We must hold the lock while
4579  * reading the old file contents.
4580  */
4581  LWLockAcquire(AutoFileLock, LW_EXCLUSIVE);
4582 
4583  /*
4584  * If we're going to reset everything, then no need to open or parse the
4585  * old file. We'll just write out an empty list.
4586  */
4587  if (!resetall)
4588  {
4589  struct stat st;
4590 
4591  if (stat(AutoConfFileName, &st) == 0)
4592  {
4593  /* open old file PG_AUTOCONF_FILENAME */
4594  FILE *infile;
4595 
4596  infile = AllocateFile(AutoConfFileName, "r");
4597  if (infile == NULL)
4598  ereport(ERROR,
4599  (errcode_for_file_access(),
4600  errmsg("could not open file \"%s\": %m",
4601  AutoConfFileName)));
4602 
4603  /* parse it */
4604  if (!ParseConfigFp(infile, AutoConfFileName, CONF_FILE_START_DEPTH,
4605  LOG, &head, &tail))
4606  ereport(ERROR,
4607  (errcode(ERRCODE_CONFIG_FILE_ERROR),
4608  errmsg("could not parse contents of file \"%s\"",
4609  AutoConfFileName)));
4610 
4611  FreeFile(infile);
4612  }
4613 
4614  /*
4615  * Now, replace any existing entry with the new value, or add it if
4616  * not present.
4617  */
4618  replace_auto_config_value(&head, &tail, name, value);
4619  }
4620 
4621  /*
4622  * Invoke the post-alter hook for setting this GUC variable. GUCs
4623  * typically do not have corresponding entries in pg_parameter_acl, so we
4624  * call the hook using the name rather than a potentially-non-existent
4625  * OID. Nonetheless, we pass ParameterAclRelationId so that this call
4626  * context can be distinguished from others. (Note that "name" will be
4627  * NULL in the RESET ALL case.)
4628  *
4629  * We do this here rather than at the end, because ALTER SYSTEM is not
4630  * transactional. If the hook aborts our transaction, it will be cleaner
4631  * to do so before we touch any files.
4632  */
4633  InvokeObjectPostAlterHookArgStr(ParameterAclRelationId, name,
4634  ACL_ALTER_SYSTEM,
4635  altersysstmt->setstmt->kind,
4636  false);
4637 
4638  /*
4639  * To ensure crash safety, first write the new file data to a temp file,
4640  * then atomically rename it into place.
4641  *
4642  * If there is a temp file left over due to a previous crash, it's okay to
4643  * truncate and reuse it.
4644  */
4645  Tmpfd = BasicOpenFile(AutoConfTmpFileName,
4646  O_CREAT | O_RDWR | O_TRUNC);
4647  if (Tmpfd < 0)
4648  ereport(ERROR,
4649  (errcode_for_file_access(),
4650  errmsg("could not open file \"%s\": %m",
4651  AutoConfTmpFileName)));
4652 
4653  /*
4654  * Use a TRY block to clean up the file if we fail. Since we need a TRY
4655  * block anyway, OK to use BasicOpenFile rather than OpenTransientFile.
4656  */
4657  PG_TRY();
4658  {
4659  /* Write and sync the new contents to the temporary file */
4660  write_auto_conf_file(Tmpfd, AutoConfTmpFileName, head);
4661 
4662  /* Close before renaming; may be required on some platforms */
4663  close(Tmpfd);
4664  Tmpfd = -1;
4665 
4666  /*
4667  * As the rename is atomic operation, if any problem occurs after this
4668  * at worst it can lose the parameters set by last ALTER SYSTEM
4669  * command.
4670  */
4671  durable_rename(AutoConfTmpFileName, AutoConfFileName, ERROR);
4672  }
4673  PG_CATCH();
4674  {
4675  /* Close file first, else unlink might fail on some platforms */
4676  if (Tmpfd >= 0)
4677  close(Tmpfd);
4678 
4679  /* Unlink, but ignore any error */
4680  (void) unlink(AutoConfTmpFileName);
4681 
4682  PG_RE_THROW();
4683  }
4684  PG_END_TRY();
4685 
4686  FreeConfigVariables(head);
4687 
4688  LWLockRelease(AutoFileLock);
4689 }
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:3950
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:881
errcode
int errcode(int sqlerrcode)
Definition: elog.c:858
errmsg
int errmsg(const char *fmt,...)
Definition: elog.c:1069
LOG
#define LOG
Definition: elog.h:31
PG_RE_THROW
#define PG_RE_THROW()
Definition: elog.h:411
PG_TRY
#define PG_TRY(...)
Definition: elog.h:370
PG_END_TRY
#define PG_END_TRY(...)
Definition: elog.h:395
ERROR
#define ERROR
Definition: elog.h:39
PG_CATCH
#define PG_CATCH(...)
Definition: elog.h:380
ereport
#define ereport(elevel,...)
Definition: elog.h:149
name
const char * name
Definition: encode.c:571
AllocateFile
FILE * AllocateFile(const char *name, const char *mode)
Definition: fd.c:2480
durable_rename
int durable_rename(const char *oldfile, const char *newfile, int elevel)
Definition: fd.c:693
BasicOpenFile
int BasicOpenFile(const char *fileName, int fileFlags)
Definition: fd.c:998
FreeFile
int FreeFile(FILE *file)
Definition: fd.c:2678
find_option
struct config_generic * find_option(const char *name, bool create_placeholders, bool skip_errors, int elevel)
Definition: guc.c:1163
parse_and_validate_value
static bool parse_and_validate_value(struct config_generic *record, const char *name, const char *value, GucSource source, int elevel, union config_var_val *newval, void **newextra)
Definition: guc.c:3083
guc_free
void guc_free(void *ptr)
Definition: guc.c:682
write_auto_conf_file
static void write_auto_conf_file(int fd, const char *filename, ConfigVariable *head)
Definition: guc.c:4312
newval
#define newval
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:4380
PG_AUTOCONF_FILENAME
#define PG_AUTOCONF_FILENAME
Definition: guc.h:33
FreeConfigVariables
void FreeConfigVariables(ConfigVariable *list)
ParseConfigFp
bool ParseConfigFp(FILE *fp, const char *config_file, int depth, int elevel, ConfigVariable **head_p, ConfigVariable **tail_p)
GUC_DISALLOW_IN_FILE
#define GUC_DISALLOW_IN_FILE
Definition: guc.h:216
GUC_DISALLOW_IN_AUTO_FILE
#define GUC_DISALLOW_IN_AUTO_FILE
Definition: guc.h:221
ExtractSetVariableArgs
char * ExtractSetVariableArgs(VariableSetStmt *stmt)
Definition: guc_funcs.c:167
PGC_STRING
@ PGC_STRING
Definition: guc_tables.h:28
value
static struct @147 value
close
#define close(a)
Definition: win32.h:12
Assert
Assert(fmt[strlen(fmt) - 1] !='\n')
LWLockAcquire
bool LWLockAcquire(LWLock *lock, LWLockMode mode)
Definition: lwlock.c:1195
LWLockRelease
void LWLockRelease(LWLock *lock)
Definition: lwlock.c:1803
LW_EXCLUSIVE
@ LW_EXCLUSIVE
Definition: lwlock.h:116
GetUserId
Oid GetUserId(void)
Definition: miscinit.c:510
InvokeObjectPostAlterHookArgStr
#define InvokeObjectPostAlterHookArgStr(classId, objectName, subId, auxiliaryId, is_internal)
Definition: objectaccess.h:247
VAR_SET_DEFAULT
@ VAR_SET_DEFAULT
Definition: parsenodes.h:2434
VAR_RESET
@ VAR_RESET
Definition: parsenodes.h:2437
VAR_SET_VALUE
@ VAR_SET_VALUE
Definition: parsenodes.h:2433
VAR_RESET_ALL
@ VAR_RESET_ALL
Definition: parsenodes.h:2438
ACL_ALTER_SYSTEM
#define ACL_ALTER_SYSTEM
Definition: parsenodes.h:96
MAXPGPATH
#define MAXPGPATH
Definition: pg_config_manual.h:115
snprintf
#define snprintf
Definition: port.h:238
AlterSystemStmt::setstmt
VariableSetStmt * setstmt
Definition: parsenodes.h:3642
VariableSetStmt::kind
VariableSetKind kind
Definition: parsenodes.h:2444
config_generic
Definition: guc_tables.h:153
config_generic::context
GucContext context
Definition: guc_tables.h:156
config_generic::flags
int flags
Definition: guc_tables.h:160
config_generic::vartype
enum config_type vartype
Definition: guc_tables.h:162
superuser
bool superuser(void)
Definition: superuser.c:46
config_var_val
Definition: guc_tables.h:33
stat
#define stat
Definition: win32_port.h:292
infile
static void infile(const char *name)
Definition: zic.c:1243

References ACL_ALTER_SYSTEM, ACLCHECK_OK, AllocateFile(), Assert(), BasicOpenFile(), close, CONF_FILE_START_DEPTH, config_generic::context, 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(), 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 2215 of file guc.c.

2216 {
2217  slist_mutable_iter iter;
2218 
2219  /*
2220  * Note: it's possible to get here with GUCNestLevel == nestLevel-1 during
2221  * abort, if there is a failure during transaction start before
2222  * AtStart_GUC is called.
2223  */
2224  Assert(nestLevel > 0 &&
2225  (nestLevel <= GUCNestLevel ||
2226  (nestLevel == GUCNestLevel + 1 && !isCommit)));
2227 
2228  /* We need only process GUCs having nonempty stacks */
2229  slist_foreach_modify(iter, &guc_stack_list)
2230  {
2231  struct config_generic *gconf = slist_container(struct config_generic,
2232  stack_link, iter.cur);
2233  GucStack *stack;
2234 
2235  /*
2236  * Process and pop each stack entry within the nest level. To simplify
2237  * fmgr_security_definer() and other places that use GUC_ACTION_SAVE,
2238  * we allow failure exit from code that uses a local nest level to be
2239  * recovered at the surrounding transaction or subtransaction abort;
2240  * so there could be more than one stack entry to pop.
2241  */
2242  while ((stack = gconf->stack) != NULL &&
2243  stack->nest_level >= nestLevel)
2244  {
2245  GucStack *prev = stack->prev;
2246  bool restorePrior = false;
2247  bool restoreMasked = false;
2248  bool changed;
2249 
2250  /*
2251  * In this next bit, if we don't set either restorePrior or
2252  * restoreMasked, we must "discard" any unwanted fields of the
2253  * stack entries to avoid leaking memory. If we do set one of
2254  * those flags, unused fields will be cleaned up after restoring.
2255  */
2256  if (!isCommit) /* if abort, always restore prior value */
2257  restorePrior = true;
2258  else if (stack->state == GUC_SAVE)
2259  restorePrior = true;
2260  else if (stack->nest_level == 1)
2261  {
2262  /* transaction commit */
2263  if (stack->state == GUC_SET_LOCAL)
2264  restoreMasked = true;
2265  else if (stack->state == GUC_SET)
2266  {
2267  /* we keep the current active value */
2268  discard_stack_value(gconf, &stack->prior);
2269  }
2270  else /* must be GUC_LOCAL */
2271  restorePrior = true;
2272  }
2273  else if (prev == NULL ||
2274  prev->nest_level < stack->nest_level - 1)
2275  {
2276  /* decrement entry's level and do not pop it */
2277  stack->nest_level--;
2278  continue;
2279  }
2280  else
2281  {
2282  /*
2283  * We have to merge this stack entry into prev. See README for
2284  * discussion of this bit.
2285  */
2286  switch (stack->state)
2287  {
2288  case GUC_SAVE:
2289  Assert(false); /* can't get here */
2290  break;
2291 
2292  case GUC_SET:
2293  /* next level always becomes SET */
2294  discard_stack_value(gconf, &stack->prior);
2295  if (prev->state == GUC_SET_LOCAL)
2296  discard_stack_value(gconf, &prev->masked);
2297  prev->state = GUC_SET;
2298  break;
2299 
2300  case GUC_LOCAL:
2301  if (prev->state == GUC_SET)
2302  {
2303  /* LOCAL migrates down */
2304  prev->masked_scontext = stack->scontext;
2305  prev->masked_srole = stack->srole;
2306  prev->masked = stack->prior;
2307  prev->state = GUC_SET_LOCAL;
2308  }
2309  else
2310  {
2311  /* else just forget this stack level */
2312  discard_stack_value(gconf, &stack->prior);
2313  }
2314  break;
2315 
2316  case GUC_SET_LOCAL:
2317  /* prior state at this level no longer wanted */
2318  discard_stack_value(gconf, &stack->prior);
2319  /* copy down the masked state */
2320  prev->masked_scontext = stack->masked_scontext;
2321  prev->masked_srole = stack->masked_srole;
2322  if (prev->state == GUC_SET_LOCAL)
2323  discard_stack_value(gconf, &prev->masked);
2324  prev->masked = stack->masked;
2325  prev->state = GUC_SET_LOCAL;
2326  break;
2327  }
2328  }
2329 
2330  changed = false;
2331 
2332  if (restorePrior || restoreMasked)
2333  {
2334  /* Perform appropriate restoration of the stacked value */
2335  config_var_value newvalue;
2336  GucSource newsource;
2337  GucContext newscontext;
2338  Oid newsrole;
2339 
2340  if (restoreMasked)
2341  {
2342  newvalue = stack->masked;
2343  newsource = PGC_S_SESSION;
2344  newscontext = stack->masked_scontext;
2345  newsrole = stack->masked_srole;
2346  }
2347  else
2348  {
2349  newvalue = stack->prior;
2350  newsource = stack->source;
2351  newscontext = stack->scontext;
2352  newsrole = stack->srole;
2353  }
2354 
2355  switch (gconf->vartype)
2356  {
2357  case PGC_BOOL:
2358  {
2359  struct config_bool *conf = (struct config_bool *) gconf;
2360  bool newval = newvalue.val.boolval;
2361  void *newextra = newvalue.extra;
2362 
2363  if (*conf->variable != newval ||
2364  conf->gen.extra != newextra)
2365  {
2366  if (conf->assign_hook)
2367  conf->assign_hook(newval, newextra);
2368  *conf->variable = newval;
2369  set_extra_field(&conf->gen, &conf->gen.extra,
2370  newextra);
2371  changed = true;
2372  }
2373  break;
2374  }
2375  case PGC_INT:
2376  {
2377  struct config_int *conf = (struct config_int *) gconf;
2378  int newval = newvalue.val.intval;
2379  void *newextra = newvalue.extra;
2380 
2381  if (*conf->variable != newval ||
2382  conf->gen.extra != newextra)
2383  {
2384  if (conf->assign_hook)
2385  conf->assign_hook(newval, newextra);
2386  *conf->variable = newval;
2387  set_extra_field(&conf->gen, &conf->gen.extra,
2388  newextra);
2389  changed = true;
2390  }
2391  break;
2392  }
2393  case PGC_REAL:
2394  {
2395  struct config_real *conf = (struct config_real *) gconf;
2396  double newval = newvalue.val.realval;
2397  void *newextra = newvalue.extra;
2398 
2399  if (*conf->variable != newval ||
2400  conf->gen.extra != newextra)
2401  {
2402  if (conf->assign_hook)
2403  conf->assign_hook(newval, newextra);
2404  *conf->variable = newval;
2405  set_extra_field(&conf->gen, &conf->gen.extra,
2406  newextra);
2407  changed = true;
2408  }
2409  break;
2410  }
2411  case PGC_STRING:
2412  {
2413  struct config_string *conf = (struct config_string *) gconf;
2414  char *newval = newvalue.val.stringval;
2415  void *newextra = newvalue.extra;
2416 
2417  if (*conf->variable != newval ||
2418  conf->gen.extra != newextra)
2419  {
2420  if (conf->assign_hook)
2421  conf->assign_hook(newval, newextra);
2422  set_string_field(conf, conf->variable, newval);
2423  set_extra_field(&conf->gen, &conf->gen.extra,
2424  newextra);
2425  changed = true;
2426  }
2427 
2428  /*
2429  * Release stacked values if not used anymore. We
2430  * could use discard_stack_value() here, but since
2431  * we have type-specific code anyway, might as
2432  * well inline it.
2433  */
2434  set_string_field(conf, &stack->prior.val.stringval, NULL);
2435  set_string_field(conf, &stack->masked.val.stringval, NULL);
2436  break;
2437  }
2438  case PGC_ENUM:
2439  {
2440  struct config_enum *conf = (struct config_enum *) gconf;
2441  int newval = newvalue.val.enumval;
2442  void *newextra = newvalue.extra;
2443 
2444  if (*conf->variable != newval ||
2445  conf->gen.extra != newextra)
2446  {
2447  if (conf->assign_hook)
2448  conf->assign_hook(newval, newextra);
2449  *conf->variable = newval;
2450  set_extra_field(&conf->gen, &conf->gen.extra,
2451  newextra);
2452  changed = true;
2453  }
2454  break;
2455  }
2456  }
2457 
2458  /*
2459  * Release stacked extra values if not used anymore.
2460  */
2461  set_extra_field(gconf, &(stack->prior.extra), NULL);
2462  set_extra_field(gconf, &(stack->masked.extra), NULL);
2463 
2464  /* And restore source information */
2465  set_guc_source(gconf, newsource);
2466  gconf->scontext = newscontext;
2467  gconf->srole = newsrole;
2468  }
2469 
2470  /*
2471  * Pop the GUC's state stack; if it's now empty, remove the GUC
2472  * from guc_stack_list.
2473  */
2474  gconf->stack = prev;
2475  if (prev == NULL)
2476  slist_delete_current(&iter);
2477  pfree(stack);
2478 
2479  /* Report new value if we changed it */
2480  if (changed && (gconf->flags & GUC_REPORT) &&
2481  !(gconf->status & GUC_NEEDS_REPORT))
2482  {
2483  gconf->status |= GUC_NEEDS_REPORT;
2484  slist_push_head(&guc_report_list, &gconf->report_link);
2485  }
2486  } /* end of stack-popping loop */
2487  }
2488 
2489  /* Update nesting level */
2490  GUCNestLevel = nestLevel - 1;
2491 }
guc_report_list
static slist_head guc_report_list
Definition: guc.c:221
set_string_field
static void set_string_field(struct config_string *conf, char **field, char *newval)
Definition: guc.c:724
GUCNestLevel
static int GUCNestLevel
Definition: guc.c:226
discard_stack_value
static void discard_stack_value(struct config_generic *gconf, config_var_value *val)
Definition: guc.c:839
guc_stack_list
static slist_head guc_stack_list
Definition: guc.c:219
set_guc_source
static void set_guc_source(struct config_generic *gconf, GucSource newsource)
Definition: guc.c:2077
set_extra_field
static void set_extra_field(struct config_generic *gconf, void **field, void *newval)
Definition: guc.c:785
GUC_REPORT
#define GUC_REPORT
Definition: guc.h:214
GUC_SET_LOCAL
@ GUC_SET_LOCAL
Definition: guc_tables.h:113
GUC_SET
@ GUC_SET
Definition: guc_tables.h:111
GUC_SAVE
@ GUC_SAVE
Definition: guc_tables.h:110
GUC_LOCAL
@ GUC_LOCAL
Definition: guc_tables.h:112
GUC_NEEDS_REPORT
#define GUC_NEEDS_REPORT
Definition: guc_tables.h:192
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
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:1456
Oid
unsigned int Oid
Definition: postgres_ext.h:31
config_bool
Definition: guc_tables.h:198
config_bool::gen
struct config_generic gen
Definition: guc_tables.h:199
config_bool::variable
bool * variable
Definition: guc_tables.h:201
config_bool::assign_hook
GucBoolAssignHook assign_hook
Definition: guc_tables.h:204
config_enum
Definition: guc_tables.h:258
config_enum::variable
int * variable
Definition: guc_tables.h:261
config_enum::assign_hook
GucEnumAssignHook assign_hook
Definition: guc_tables.h:265
config_enum::gen
struct config_generic gen
Definition: guc_tables.h:259
config_generic::status
int status
Definition: guc_tables.h:163
config_generic::scontext
GucContext scontext
Definition: guc_tables.h:166
config_generic::stack_link
slist_node stack_link
Definition: guc_tables.h:174
config_generic::srole
Oid srole
Definition: guc_tables.h:168
config_generic::stack
GucStack * stack
Definition: guc_tables.h:170
config_generic::extra
void * extra
Definition: guc_tables.h:171
config_generic::report_link
slist_node report_link
Definition: guc_tables.h:176
config_int
Definition: guc_tables.h:212
config_int::assign_hook
GucIntAssignHook assign_hook
Definition: guc_tables.h:220
config_int::variable
int * variable
Definition: guc_tables.h:215
config_int::gen
struct config_generic gen
Definition: guc_tables.h:213
config_real
Definition: guc_tables.h:228
config_real::assign_hook
GucRealAssignHook assign_hook
Definition: guc_tables.h:236
config_real::variable
double * variable
Definition: guc_tables.h:231
config_real::gen
struct config_generic gen
Definition: guc_tables.h:229
config_string
Definition: guc_tables.h:244
config_string::gen
struct config_generic gen
Definition: guc_tables.h:245
config_string::assign_hook
GucStringAssignHook assign_hook
Definition: guc_tables.h:250
config_string::variable
char ** variable
Definition: guc_tables.h:247
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:117
guc_stack::prev
struct guc_stack * prev
Definition: guc_tables.h:118
guc_stack::masked_srole
Oid masked_srole
Definition: guc_tables.h:126
guc_stack::nest_level
int nest_level
Definition: guc_tables.h:119
guc_stack::masked
config_var_value masked
Definition: guc_tables.h:128
guc_stack::prior
config_var_value prior
Definition: guc_tables.h:127
guc_stack::srole
Oid srole
Definition: guc_tables.h:125
guc_stack::scontext
GucContext scontext
Definition: guc_tables.h:123
guc_stack::state
GucStackState state
Definition: guc_tables.h:120
guc_stack::source
GucSource source
Definition: guc_tables.h:121
guc_stack::masked_scontext
GucContext masked_scontext
Definition: guc_tables.h:124
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 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, config_bool::gen, config_int::gen, config_real::gen, config_string::gen, config_enum::gen, 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(), brin_summarize_range(), bt_index_check_internal(), cluster_rel(), CommitSubTransaction(), CommitTransaction(), ComputeIndexAttrs(), CreateSchemaCommand(), DefineIndex(), do_analyze_rel(), ExecCreateTableAs(), ExecRefreshMatView(), execute_extension_script(), fmgr_security_definer(), index_build(), index_concurrently_build(), PrepareTransaction(), ProcedureCreate(), 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 2181 of file guc.c.

2182 {
2183  /*
2184  * The nest level should be 0 between transactions; if it isn't, somebody
2185  * didn't call AtEOXact_GUC, or called it with the wrong nestLevel. We
2186  * throw a warning but make no other effort to clean up.
2187  */
2188  if (GUCNestLevel != 0)
2189  elog(WARNING, "GUC nest level = %d at transaction start",
2190  GUCNestLevel);
2191  GUCNestLevel = 1;
2192 }
WARNING
#define WARNING
Definition: elog.h:36

References elog(), GUCNestLevel, and WARNING.

Referenced by StartTransaction().

◆ BeginReportingGUCOptions()

void BeginReportingGUCOptions ( void  )

Definition at line 2499 of file guc.c.

2500 {
2501  HASH_SEQ_STATUS status;
2502  GUCHashEntry *hentry;
2503 
2504  /*
2505  * Don't do anything unless talking to an interactive frontend.
2506  */
2507  if (whereToSendOutput != DestRemote)
2508  return;
2509 
2510  reporting_enabled = true;
2511 
2512  /*
2513  * Hack for in_hot_standby: set the GUC value true if appropriate. This
2514  * is kind of an ugly place to do it, but there's few better options.
2515  *
2516  * (This could be out of date by the time we actually send it, in which
2517  * case the next ReportChangedGUCOptions call will send a duplicate
2518  * report.)
2519  */
2520  if (RecoveryInProgress())
2521  SetConfigOption("in_hot_standby", "true",
2522  PGC_INTERNAL, PGC_S_OVERRIDE);
2523 
2524  /* Transmit initial values of interesting variables */
2525  hash_seq_init(&status, guc_hashtab);
2526  while ((hentry = (GUCHashEntry *) hash_seq_search(&status)) != NULL)
2527  {
2528  struct config_generic *conf = hentry->gucvar;
2529 
2530  if (conf->flags & GUC_REPORT)
2531  ReportGUCOption(conf);
2532  }
2533 }
DestRemote
@ DestRemote
Definition: dest.h:89
hash_seq_search
void * hash_seq_search(HASH_SEQ_STATUS *status)
Definition: dynahash.c:1431
hash_seq_init
void hash_seq_init(HASH_SEQ_STATUS *status, HTAB *hashp)
Definition: dynahash.c:1421
ReportGUCOption
static void ReportGUCOption(struct config_generic *record)
Definition: guc.c:2587
SetConfigOption
void SetConfigOption(const char *name, const char *value, GucContext context, GucSource source)
Definition: guc.c:4176
guc_hashtab
static HTAB * guc_hashtab
Definition: guc.c:207
reporting_enabled
static bool reporting_enabled
Definition: guc.c:224
whereToSendOutput
CommandDest whereToSendOutput
Definition: postgres.c:88
GUCHashEntry::gucvar
struct config_generic * gucvar
Definition: guc.c:204
HASH_SEQ_STATUS
Definition: hsearch.h:121
RecoveryInProgress
bool RecoveryInProgress(void)
Definition: xlog.c:5921

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()

bool check_GUC_name_for_parameter_acl ( const char *  name)

Definition at line 1375 of file guc.c.

1376 {
1377  /* OK if the GUC exists. */
1378  if (find_option(name, false, true, DEBUG1) != NULL)
1379  return true;
1380  /* Otherwise, it'd better be a valid custom GUC name. */
1381  if (valid_custom_variable_name(name))
1382  return true;
1383  return false;
1384 }
DEBUG1
#define DEBUG1
Definition: elog.h:30
valid_custom_variable_name
static bool valid_custom_variable_name(const char *name)
Definition: guc.c:1069

References DEBUG1, find_option(), name, and valid_custom_variable_name().

Referenced by ParameterAclCreate().

◆ convert_GUC_name_for_parameter_acl()

char* convert_GUC_name_for_parameter_acl ( const char *  name)

Definition at line 1339 of file guc.c.

1340 {
1341  char *result;
1342 
1343  /* Apply old-GUC-name mapping. */
1344  for (int i = 0; map_old_guc_names[i] != NULL; i += 2)
1345  {
1346  if (guc_name_compare(name, map_old_guc_names[i]) == 0)
1347  {
1348  name = map_old_guc_names[i + 1];
1349  break;
1350  }
1351  }
1352 
1353  /* Apply case-folding that matches guc_name_compare(). */
1354  result = pstrdup(name);
1355  for (char *ptr = result; *ptr != '\0'; ptr++)
1356  {
1357  char ch = *ptr;
1358 
1359  if (ch >= 'A' && ch <= 'Z')
1360  {
1361  ch += 'a' - 'A';
1362  *ptr = ch;
1363  }
1364  }
1365 
1366  return result;
1367 }
map_old_guc_names
static const char *const map_old_guc_names[]
Definition: guc.c:186
guc_name_compare
int guc_name_compare(const char *namea, const char *nameb)
Definition: guc.c:1265
i
int i
Definition: isn.c:73
pstrdup
char * pstrdup(const char *in)
Definition: mcxt.c:1644

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)

◆ 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 5772 of file guc.c.

5773 {
5774  Size size;
5775  dlist_iter iter;
5776 
5777  /* Add space reqd for saving the data size of the guc state */
5778  size = sizeof(Size);
5779 
5780  /*
5781  * Add up the space needed for each GUC variable.
5782  *
5783  * We need only process non-default GUCs.
5784  */
5785  dlist_foreach(iter, &guc_nondef_list)
5786  {
5787  struct config_generic *gconf = dlist_container(struct config_generic,
5788  nondef_link, iter.cur);
5789 
5790  size = add_size(size, estimate_variable_size(gconf));
5791  }
5792 
5793  return size;
5794 }
Size
size_t Size
Definition: c.h:589
guc_nondef_list
static dlist_head guc_nondef_list
Definition: guc.c:217
estimate_variable_size
static Size estimate_variable_size(struct config_generic *gconf)
Definition: guc.c:5672
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:502
config_generic::nondef_link
dlist_node nondef_link
Definition: guc_tables.h:172
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:1969
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:3284
SetPGVariable
void SetPGVariable(const char *name, List *args, bool is_local)
Definition: guc_funcs.c:315
stmt
#define stmt
Definition: indent_codes.h:59
generate_unaccent_rules.action
action
Definition: generate_unaccent_rules.py:278
ACL_SET
#define ACL_SET
Definition: parsenodes.h:95
VAR_SET_MULTI
@ VAR_SET_MULTI
Definition: parsenodes.h:2436
VAR_SET_CURRENT
@ VAR_SET_CURRENT
Definition: parsenodes.h:2435
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:1396
A_Const
Definition: parsenodes.h:356
A_Const::val
union ValUnion val
Definition: parsenodes.h:360
DefElem::defname
char * defname
Definition: parsenodes.h:810
DefElem::arg
Node * arg
Definition: parsenodes.h:811
strVal
#define strVal(v)
Definition: value.h:82
WarnNoTransactionBlock
void WarnNoTransactionBlock(bool isTopLevel, const char *stmtType)
Definition: xact.c:3552
IsInParallelMode
bool IsInParallelMode(void)
Definition: xact.c:1069

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:5251
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)

Referenced by AlterSystemSetConfigFile(), and parse_extension_control_file().

◆ get_config_unit_name()

const char* get_config_unit_name ( int  flags)

Definition at line 2767 of file guc.c.

2768 {
2769  switch (flags & (GUC_UNIT_MEMORY | GUC_UNIT_TIME))
2770  {
2771  case 0:
2772  return NULL; /* GUC has no units */
2773  case GUC_UNIT_BYTE:
2774  return "B";
2775  case GUC_UNIT_KB:
2776  return "kB";
2777  case GUC_UNIT_MB:
2778  return "MB";
2779  case GUC_UNIT_BLOCKS:
2780  {
2781  static char bbuf[8];
2782 
2783  /* initialize if first time through */
2784  if (bbuf[0] == '\0')
2785  snprintf(bbuf, sizeof(bbuf), "%dkB", BLCKSZ / 1024);
2786  return bbuf;
2787  }
2788  case GUC_UNIT_XBLOCKS:
2789  {
2790  static char xbuf[8];
2791 
2792  /* initialize if first time through */
2793  if (xbuf[0] == '\0')
2794  snprintf(xbuf, sizeof(xbuf), "%dkB", XLOG_BLCKSZ / 1024);
2795  return xbuf;
2796  }
2797  case GUC_UNIT_MS:
2798  return "ms";
2799  case GUC_UNIT_S:
2800  return "s";
2801  case GUC_UNIT_MIN:
2802  return "min";
2803  default:
2804  elog(ERROR, "unrecognized GUC units value: %d",
2805  flags & (GUC_UNIT_MEMORY | GUC_UNIT_TIME));
2806  return NULL;
2807  }
2808 }
GUC_UNIT_MB
#define GUC_UNIT_MB
Definition: guc.h:228
GUC_UNIT_TIME
#define GUC_UNIT_TIME
Definition: guc.h:235
GUC_UNIT_MS
#define GUC_UNIT_MS
Definition: guc.h:232
GUC_UNIT_BLOCKS
#define GUC_UNIT_BLOCKS
Definition: guc.h:226
GUC_UNIT_XBLOCKS
#define GUC_UNIT_XBLOCKS
Definition: guc.h:227
GUC_UNIT_BYTE
#define GUC_UNIT_BYTE
Definition: guc.h:229
GUC_UNIT_S
#define GUC_UNIT_S
Definition: guc.h:233
GUC_UNIT_KB
#define GUC_UNIT_KB
Definition: guc.h:225
GUC_UNIT_MIN
#define GUC_UNIT_MIN
Definition: guc.h:234
GUC_UNIT_MEMORY
#define GUC_UNIT_MEMORY
Definition: guc.h:230

References elog(), ERROR, config_generic::flags, GUC_UNIT_BLOCKS, GUC_UNIT_BYTE, GUC_UNIT_KB, GUC_UNIT_MB, GUC_UNIT_MEMORY, GUC_UNIT_MIN, GUC_UNIT_MS, GUC_UNIT_S, GUC_UNIT_TIME, 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 4200 of file guc.c.

4201 {
4202  struct config_generic *record;
4203  static char buffer[256];
4204 
4205  record = find_option(name, false, missing_ok, ERROR);
4206  if (record == NULL)
4207  return NULL;
4208  if (restrict_privileged &&
4209  !ConfigOptionIsVisible(record))
4210  ereport(ERROR,
4211  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4212  errmsg("permission denied to examine \"%s\"", name),
4213  errdetail("Only roles with privileges of the \"%s\" role may examine this parameter.",
4214  "pg_read_all_settings")));
4215 
4216  switch (record->vartype)
4217  {
4218  case PGC_BOOL:
4219  return *((struct config_bool *) record)->variable ? "on" : "off";
4220 
4221  case PGC_INT:
4222  snprintf(buffer, sizeof(buffer), "%d",
4223  *((struct config_int *) record)->variable);
4224  return buffer;
4225 
4226  case PGC_REAL:
4227  snprintf(buffer, sizeof(buffer), "%g",
4228  *((struct config_real *) record)->variable);
4229  return buffer;
4230 
4231  case PGC_STRING:
4232  return *((struct config_string *) record)->variable;
4233 
4234  case PGC_ENUM:
4235  return config_enum_lookup_by_value((struct config_enum *) record,
4236  *((struct config_enum *) record)->variable);
4237  }
4238  return NULL;
4239 }
errdetail
int errdetail(const char *fmt,...)
Definition: elog.c:1202
config_enum_lookup_by_value
const char * config_enum_lookup_by_value(struct config_enum *record, int val)
Definition: guc.c:2976
ConfigOptionIsVisible
bool ConfigOptionIsVisible(struct config_generic *conf)
Definition: guc_funcs.c:581

References 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, and config_generic::vartype.

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

◆ GetConfigOptionByName()

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

Definition at line 5251 of file guc.c.

5252 {
5253  struct config_generic *record;
5254 
5255  record = find_option(name, false, missing_ok, ERROR);
5256  if (record == NULL)
5257  {
5258  if (varname)
5259  *varname = NULL;
5260  return NULL;
5261  }
5262 
5263  if (!ConfigOptionIsVisible(record))
5264  ereport(ERROR,
5265  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
5266  errmsg("permission denied to examine \"%s\"", name),
5267  errdetail("Only roles with privileges of the \"%s\" role may examine this parameter.",
5268  "pg_read_all_settings")));
5269 
5270  if (varname)
5271  *varname = record->name;
5272 
5273  return ShowGUCOption(record, true);
5274 }
ShowGUCOption
char * ShowGUCOption(struct config_generic *record, bool use_units)
Definition: guc.c:5284
config_generic::name
const char * name
Definition: guc_tables.h:155

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 4295 of file guc.c.

4296 {
4297  struct config_generic *record;
4298 
4299  record = find_option(name, false, missing_ok, ERROR);
4300  if (record == NULL)
4301  return 0;
4302  return record->flags;
4303 }

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 4249 of file guc.c.

4250 {
4251  struct config_generic *record;
4252  static char buffer[256];
4253 
4254  record = find_option(name, false, false, ERROR);
4255  Assert(record != NULL);
4256  if (!ConfigOptionIsVisible(record))
4257  ereport(ERROR,
4258  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4259  errmsg("permission denied to examine \"%s\"", name),
4260  errdetail("Only roles with privileges of the \"%s\" role may examine this parameter.",
4261  "pg_read_all_settings")));
4262 
4263  switch (record->vartype)
4264  {
4265  case PGC_BOOL:
4266  return ((struct config_bool *) record)->reset_val ? "on" : "off";
4267 
4268  case PGC_INT:
4269  snprintf(buffer, sizeof(buffer), "%d",
4270  ((struct config_int *) record)->reset_val);
4271  return buffer;
4272 
4273  case PGC_REAL:
4274  snprintf(buffer, sizeof(buffer), "%g",
4275  ((struct config_real *) record)->reset_val);
4276  return buffer;
4277 
4278  case PGC_STRING:
4279  return ((struct config_string *) record)->reset_val;
4280 
4281  case PGC_ENUM:
4282  return config_enum_lookup_by_value((struct config_enum *) record,
4283  ((struct config_enum *) record)->reset_val);
4284  }
4285  return NULL;
4286 }

References 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, snprintf, and config_generic::vartype.

Referenced by check_datestyle().

◆ GetPGVariable()

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

Definition at line 382 of file guc_funcs.c.

383 {
384  if (guc_name_compare(name, "all") == 0)
385  ShowAllGUCConfig(dest);
386  else
387  ShowGUCConfigOption(name, dest);
388 }
ShowGUCConfigOption
static void ShowGUCConfigOption(const char *name, DestReceiver *dest)
Definition: guc_funcs.c:428
ShowAllGUCConfig
static void ShowAllGUCConfig(DestReceiver *dest)
Definition: guc_funcs.c:456
generate_unaccent_rules.dest
dest
Definition: generate_unaccent_rules.py:276

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 394 of file guc_funcs.c.

395 {
396  TupleDesc tupdesc;
397 
398  if (guc_name_compare(name, "all") == 0)
399  {
400  /* need a tuple descriptor representing three TEXT columns */
401  tupdesc = CreateTemplateTupleDesc(3);
402  TupleDescInitEntry(tupdesc, (AttrNumber) 1, "name",
403  TEXTOID, -1, 0);
404  TupleDescInitEntry(tupdesc, (AttrNumber) 2, "setting",
405  TEXTOID, -1, 0);
406  TupleDescInitEntry(tupdesc, (AttrNumber) 3, "description",
407  TEXTOID, -1, 0);
408  }
409  else
410  {
411  const char *varname;
412 
413  /* Get the canonical spelling of name */
414  (void) GetConfigOptionByName(name, &varname, false);
415 
416  /* need a tuple descriptor representing a single TEXT column */
417  tupdesc = CreateTemplateTupleDesc(1);
418  TupleDescInitEntry(tupdesc, (AttrNumber) 1, varname,
419  TEXTOID, -1, 0);
420  }
421  return tupdesc;
422 }
AttrNumber
int16 AttrNumber
Definition: attnum.h:21
CreateTemplateTupleDesc
TupleDesc CreateTemplateTupleDesc(int natts)
Definition: tupdesc.c:45
TupleDescInitEntry
void TupleDescInitEntry(TupleDesc desc, AttrNumber attributeNumber, const char *attributeName, Oid oidtypeid, int32 typmod, int attdim)
Definition: tupdesc.c:583

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

Referenced by UtilityTupleDescriptor().

◆ GUC_check_errcode()

void GUC_check_errcode ( int  sqlerrcode)

Definition at line 6578 of file guc.c.

6579 {
6580  GUC_check_errcode_value = sqlerrcode;
6581 }
GUC_check_errcode_value
static int GUC_check_errcode_value
Definition: guc.c:69

References GUC_check_errcode_value.

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

◆ guc_free()

void guc_free ( void *  ptr)

Definition at line 682 of file guc.c.

683 {
684  /*
685  * Historically, GUC-related code has relied heavily on the ability to do
686  * free(NULL), so we allow that here even though pfree() doesn't.
687  */
688  if (ptr != NULL)
689  {
690  /* This is to help catch old code that malloc's GUC data. */
691  Assert(GetMemoryChunkContext(ptr) == GUCMemoryContext);
692  pfree(ptr);
693  }
694 }
GUCMemoryContext
static MemoryContext GUCMemoryContext
Definition: guc.c:194
GetMemoryChunkContext
MemoryContext GetMemoryChunkContext(void *pointer)
Definition: mcxt.c:616

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

Referenced by add_placeholder_variable(), AlterSystemSetConfigFile(), call_string_check_hook(), check_client_encoding(), check_datestyle(), check_default_text_search_config(), define_custom_variable(), parse_and_validate_value(), ReportGUCOption(), RestoreGUCState(), SelectConfigFiles(), set_config_option_ext(), set_config_sourcefile(), set_extra_field(), and set_string_field().

◆ guc_malloc()

void* guc_malloc ( int  elevel,
size_t  size 
)

Definition at line 631 of file guc.c.

632 {
633  void *data;
634 
635  data = MemoryContextAllocExtended(GUCMemoryContext, size,
636  MCXT_ALLOC_NO_OOM);
637  if (unlikely(data == NULL))
638  ereport(elevel,
639  (errcode(ERRCODE_OUT_OF_MEMORY),
640  errmsg("out of memory")));
641  return data;
642 }
unlikely
#define unlikely(x)
Definition: c.h:295
MCXT_ALLOC_NO_OOM
#define MCXT_ALLOC_NO_OOM
Definition: fe_memutils.h:17
MemoryContextAllocExtended
void * MemoryContextAllocExtended(MemoryContext context, Size size, int flags)
Definition: mcxt.c:1137
data
const void * data
Definition: pg_crc32c_sse42.c:23

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_io_direct(), check_log_destination(), check_log_timezone(), check_random_seed(), check_recovery_target_lsn(), check_recovery_target_timeline(), check_recovery_target_xid(), check_role(), check_session_authorization(), 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 645 of file guc.c.

646 {
647  void *data;
648 
649  if (old != NULL)
650  {
651  /* This is to help catch old code that malloc's GUC data. */
652  Assert(GetMemoryChunkContext(old) == GUCMemoryContext);
653  data = repalloc_extended(old, size,
654  MCXT_ALLOC_NO_OOM);
655  }
656  else
657  {
658  /* Like realloc(3), but not like repalloc(), we allow old == NULL. */
659  data = MemoryContextAllocExtended(GUCMemoryContext, size,
660  MCXT_ALLOC_NO_OOM);
661  }
662  if (unlikely(data == NULL))
663  ereport(elevel,
664  (errcode(ERRCODE_OUT_OF_MEMORY),
665  errmsg("out of memory")));
666  return data;
667 }
repalloc_extended
void * repalloc_extended(void *pointer, Size size, int flags)
Definition: mcxt.c:1521

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 670 of file guc.c.

671 {
672  char *data;
673  size_t len = strlen(src) + 1;
674 
675  data = guc_malloc(elevel, len);
676  if (likely(data != NULL))
677  memcpy(data, src, len);
678  return data;
679 }
likely
#define likely(x)
Definition: c.h:294
guc_malloc
void * guc_malloc(int elevel, size_t size)
Definition: guc.c:631
len
const void size_t len
Definition: pg_crc32c_sse42.c:24

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_option_ext(), and set_config_sourcefile().

◆ GUCArrayAdd()

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

Definition at line 6281 of file guc.c.

6282 {
6283  struct config_generic *record;
6284  Datum datum;
6285  char *newval;
6286  ArrayType *a;
6287 
6288  Assert(name);
6289  Assert(value);
6290 
6291  /* test if the option is valid and we're allowed to set it */
6292  (void) validate_option_array_item(name, value, false);
6293 
6294  /* normalize name (converts obsolete GUC names to modern spellings) */
6295  record = find_option(name, false, true, WARNING);
6296  if (record)
6297  name = record->name;
6298 
6299  /* build new item for array */
6300  newval = psprintf("%s=%s", name, value);
6301  datum = CStringGetTextDatum(newval);
6302 
6303  if (array)
6304  {
6305  int index;
6306  bool isnull;
6307  int i;
6308 
6309  Assert(ARR_ELEMTYPE(array) == TEXTOID);
6310  Assert(ARR_NDIM(array) == 1);
6311  Assert(ARR_LBOUND(array)[0] == 1);
6312 
6313  index = ARR_DIMS(array)[0] + 1; /* add after end */
6314 
6315  for (i = 1; i <= ARR_DIMS(array)[0]; i++)
6316  {
6317  Datum d;
6318  char *current;
6319 
6320  d = array_ref(array, 1, &i,
6321  -1 /* varlenarray */ ,
6322  -1 /* TEXT's typlen */ ,
6323  false /* TEXT's typbyval */ ,
6324  TYPALIGN_INT /* TEXT's typalign */ ,
6325  &isnull);
6326  if (isnull)
6327  continue;
6328  current = TextDatumGetCString(d);
6329 
6330  /* check for match up through and including '=' */
6331  if (strncmp(current, newval, strlen(name) + 1) == 0)
6332  {
6333  index = i;
6334  break;
6335  }
6336  }
6337 
6338  a = array_set(array, 1, &index,
6339  datum,
6340  false,
6341  -1 /* varlena array */ ,
6342  -1 /* TEXT's typlen */ ,
6343  false /* TEXT's typbyval */ ,
6344  TYPALIGN_INT /* TEXT's typalign */ );
6345  }
6346  else
6347  a = construct_array_builtin(&datum, 1, TEXTOID);
6348 
6349  return a;
6350 }
ARR_NDIM
#define ARR_NDIM(a)
Definition: array.h:283
ARR_ELEMTYPE
#define ARR_ELEMTYPE(a)
Definition: array.h:285
ARR_DIMS
#define ARR_DIMS(a)
Definition: array.h:287
ARR_LBOUND
#define ARR_LBOUND(a)
Definition: array.h:289
construct_array_builtin
ArrayType * construct_array_builtin(Datum *elems, int nelems, Oid elmtype)
Definition: arrayfuncs.c:3361
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:3143
array_ref
Datum array_ref(ArrayType *array, int nSubscripts, int *indx, int arraytyplen, int elmlen, bool elmbyval, char elmalign, bool *isNull)
Definition: arrayfuncs.c:3126
CStringGetTextDatum
#define CStringGetTextDatum(s)
Definition: builtins.h:94
TextDatumGetCString
#define TextDatumGetCString(d)
Definition: builtins.h:95
validate_option_array_item
static bool validate_option_array_item(const char *name, const char *value, bool skipIfNoPermissions)
Definition: guc.c:6501
a
int a
Definition: isn.c:69
Datum
uintptr_t Datum
Definition: postgres.h:64
psprintf
char * psprintf(const char *fmt,...)
Definition: psprintf.c:46
index
Definition: type.h:95

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 6359 of file guc.c.

6360 {
6361  struct config_generic *record;
6362  ArrayType *newarray;
6363  int i;
6364  int index;
6365 
6366  Assert(name);
6367 
6368  /* test if the option is valid and we're allowed to set it */
6369  (void) validate_option_array_item(name, NULL, false);
6370 
6371  /* normalize name (converts obsolete GUC names to modern spellings) */
6372  record = find_option(name, false, true, WARNING);
6373  if (record)
6374  name = record->name;
6375 
6376  /* if array is currently null, then surely nothing to delete */
6377  if (!array)
6378  return NULL;
6379 
6380  newarray = NULL;
6381  index = 1;
6382 
6383  for (i = 1; i <= ARR_DIMS(array)[0]; i++)
6384  {
6385  Datum d;
6386  char *val;
6387  bool isnull;
6388 
6389  d = array_ref(array, 1, &i,
6390  -1 /* varlenarray */ ,
6391  -1 /* TEXT's typlen */ ,
6392  false /* TEXT's typbyval */ ,
6393  TYPALIGN_INT /* TEXT's typalign */ ,
6394  &isnull);
6395  if (isnull)
6396  continue;
6397  val = TextDatumGetCString(d);
6398 
6399  /* ignore entry if it's what we want to delete */
6400  if (strncmp(val, name, strlen(name)) == 0
6401  && val[strlen(name)] == '=')
6402  continue;
6403 
6404  /* else add it to the output array */
6405  if (newarray)
6406  newarray = array_set(newarray, 1, &index,
6407  d,
6408  false,
6409  -1 /* varlenarray */ ,
6410  -1 /* TEXT's typlen */ ,
6411  false /* TEXT's typbyval */ ,
6412  TYPALIGN_INT /* TEXT's typalign */ );
6413  else
6414  newarray = construct_array_builtin(&d, 1, TEXTOID);
6415 
6416  index++;
6417  }
6418 
6419  return newarray;
6420 }
val
long val
Definition: informix.c:664

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 6429 of file guc.c.

6430 {
6431  ArrayType *newarray;
6432  int i;
6433  int index;
6434 
6435  /* if array is currently null, nothing to do */
6436  if (!array)
6437  return NULL;
6438 
6439  /* if we're superuser, we can delete everything, so just do it */
6440  if (superuser())
6441  return NULL;
6442 
6443  newarray = NULL;
6444  index = 1;
6445 
6446  for (i = 1; i <= ARR_DIMS(array)[0]; i++)
6447  {
6448  Datum d;
6449  char *val;
6450  char *eqsgn;
6451  bool isnull;
6452 
6453  d = array_ref(array, 1, &i,
6454  -1 /* varlenarray */ ,
6455  -1 /* TEXT's typlen */ ,
6456  false /* TEXT's typbyval */ ,
6457  TYPALIGN_INT /* TEXT's typalign */ ,
6458  &isnull);
6459  if (isnull)
6460  continue;
6461  val = TextDatumGetCString(d);
6462 
6463  eqsgn = strchr(val, '=');
6464  *eqsgn = '\0';
6465 
6466  /* skip if we have permission to delete it */
6467  if (validate_option_array_item(val, NULL, true))
6468  continue;
6469 
6470  /* else add it to the output array */
6471  if (newarray)
6472  newarray = array_set(newarray, 1, &index,
6473  d,
6474  false,
6475  -1 /* varlenarray */ ,
6476  -1 /* TEXT's typlen */ ,
6477  false /* TEXT's typbyval */ ,
6478  TYPALIGN_INT /* TEXT's typalign */ );
6479  else
6480  newarray = construct_array_builtin(&d, 1, TEXTOID);
6481 
6482  index++;
6483  pfree(val);
6484  }
6485 
6486  return newarray;
6487 }

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 1495 of file guc.c.

1496 {
1497  HASH_SEQ_STATUS status;
1498  GUCHashEntry *hentry;
1499 
1500  /*
1501  * Before log_line_prefix could possibly receive a nonempty setting, make
1502  * sure that timezone processing is minimally alive (see elog.c).
1503  */
1504  pg_timezone_initialize();
1505 
1506  /*
1507  * Create GUCMemoryContext and build hash table of all GUC variables.
1508  */
1509  build_guc_variables();
1510 
1511  /*
1512  * Load all variables with their compiled-in defaults, and initialize
1513  * status fields as needed.
1514  */
1515  hash_seq_init(&status, guc_hashtab);
1516  while ((hentry = (GUCHashEntry *) hash_seq_search(&status)) != NULL)
1517  {
1518  /* Check mapping between initial and default value */
1519  Assert(check_GUC_init(hentry->gucvar));
1520 
1521  InitializeOneGUCOption(hentry->gucvar);
1522  }
1523 
1524  reporting_enabled = false;
1525 
1526  /*
1527  * Prevent any attempt to override the transaction modes from
1528  * non-interactive sources.
1529  */
1530  SetConfigOption("transaction_isolation", "read committed",
1531  PGC_POSTMASTER, PGC_S_OVERRIDE);
1532  SetConfigOption("transaction_read_only", "no",
1533  PGC_POSTMASTER, PGC_S_OVERRIDE);
1534  SetConfigOption("transaction_deferrable", "no",
1535  PGC_POSTMASTER, PGC_S_OVERRIDE);
1536 
1537  /*
1538  * For historical reasons, some GUC parameters can receive defaults from
1539  * environment variables. Process those settings.
1540  */
1541  InitializeGUCOptionsFromEnvironment();
1542 }
InitializeOneGUCOption
static void InitializeOneGUCOption(struct config_generic *gconf)
Definition: guc.c:1609
build_guc_variables
void build_guc_variables(void)
Definition: guc.c:896
InitializeGUCOptionsFromEnvironment
static void InitializeGUCOptionsFromEnvironment(void)
Definition: guc.c:1554
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 5105 of file guc.c.

5106 {
5107  int classLen = strlen(className);
5108  HASH_SEQ_STATUS status;
5109  GUCHashEntry *hentry;
5110  MemoryContext oldcontext;
5111 
5112  /*
5113  * Check for existing placeholders. We must actually remove invalid
5114  * placeholders, else future parallel worker startups will fail. (We
5115  * don't bother trying to free associated memory, since this shouldn't
5116  * happen often.)
5117  */
5118  hash_seq_init(&status, guc_hashtab);
5119  while ((hentry = (GUCHashEntry *) hash_seq_search(&status)) != NULL)
5120  {
5121  struct config_generic *var = hentry->gucvar;
5122 
5123  if ((var->flags & GUC_CUSTOM_PLACEHOLDER) != 0 &&
5124  strncmp(className, var->name, classLen) == 0 &&
5125  var->name[classLen] == GUC_QUALIFIER_SEPARATOR)
5126  {
5127  ereport(WARNING,
5128  (errcode(ERRCODE_INVALID_NAME),
5129  errmsg("invalid configuration parameter name \"%s\", removing it",
5130  var->name),
5131  errdetail("\"%s\" is now a reserved prefix.",
5132  className)));
5133  /* Remove it from the hash table */
5134  hash_search(guc_hashtab,
5135  &var->name,
5136  HASH_REMOVE,
5137  NULL);
5138  /* Remove it from any lists it's in, too */
5139  RemoveGUCFromLists(var);
5140  }
5141  }
5142 
5143  /* And remember the name so we can prevent future mistakes. */
5144  oldcontext = MemoryContextSwitchTo(GUCMemoryContext);
5145  reserved_class_prefix = lappend(reserved_class_prefix, pstrdup(className));
5146  MemoryContextSwitchTo(oldcontext);
5147 }
hash_search
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:953
RemoveGUCFromLists
static void RemoveGUCFromLists(struct config_generic *gconf)
Definition: guc.c:1726
reserved_class_prefix
static List * reserved_class_prefix
Definition: guc.c:71
GUC_CUSTOM_PLACEHOLDER
#define GUC_CUSTOM_PLACEHOLDER
Definition: guc.h:217
GUC_QUALIFIER_SEPARATOR
#define GUC_QUALIFIER_SEPARATOR
Definition: guc.h:202
HASH_REMOVE
@ HASH_REMOVE
Definition: hsearch.h:115
lappend
List * lappend(List *list, void *datum)
Definition: list.c:338
MemoryContextSwitchTo
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:138

References ereport, errcode(), errdetail(), errmsg(), config_generic::flags, 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, and WARNING.

Referenced by _PG_init().

◆ NewGUCNestLevel()

int NewGUCNestLevel ( void  )

Definition at line 2201 of file guc.c.

2202 {
2203  return ++GUCNestLevel;
2204 }

References GUCNestLevel.

Referenced by applyRemoteGucs(), brin_summarize_range(), bt_index_check_internal(), cluster_rel(), ComputeIndexAttrs(), CreateSchemaCommand(), DefineIndex(), do_analyze_rel(), ExecCreateTableAs(), ExecRefreshMatView(), execute_extension_script(), fmgr_security_definer(), index_build(), index_concurrently_build(), ProcedureCreate(), PushTransaction(), 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 2824 of file guc.c.

2825 {
2826  /*
2827  * We assume here that double is wide enough to represent any integer
2828  * value with adequate precision.
2829  */
2830  double val;
2831  char *endptr;
2832 
2833  /* To suppress compiler warnings, always set output params */
2834  if (result)
2835  *result = 0;
2836  if (hintmsg)
2837  *hintmsg = NULL;
2838 
2839  /*
2840  * Try to parse as an integer (allowing octal or hex input). If the
2841  * conversion stops at a decimal point or 'e', or overflows, re-parse as
2842  * float. This should work fine as long as we have no unit names starting
2843  * with 'e'. If we ever do, the test could be extended to check for a
2844  * sign or digit after 'e', but for now that's unnecessary.
2845  */
2846  errno = 0;
2847  val = strtol(value, &endptr, 0);
2848  if (*endptr == '.' || *endptr == 'e' || *endptr == 'E' ||
2849  errno == ERANGE)
2850  {
2851  errno = 0;
2852  val = strtod(value, &endptr);
2853  }
2854 
2855  if (endptr == value || errno == ERANGE)
2856  return false; /* no HINT for these cases */
2857 
2858  /* reject NaN (infinities will fail range check below) */
2859  if (isnan(val))
2860  return false; /* treat same as syntax error; no HINT */
2861 
2862  /* allow whitespace between number and unit */
2863  while (isspace((unsigned char) *endptr))
2864  endptr++;
2865 
2866  /* Handle possible unit */
2867  if (*endptr != '\0')
2868  {
2869  if ((flags & GUC_UNIT) == 0)
2870  return false; /* this setting does not accept a unit */
2871 
2872  if (!convert_to_base_unit(val,
2873  endptr, (flags & GUC_UNIT),
2874  &val))
2875  {
2876  /* invalid unit, or garbage after the unit; set hint and fail. */
2877  if (hintmsg)
2878  {
2879  if (flags & GUC_UNIT_MEMORY)
2880  *hintmsg = memory_units_hint;
2881  else
2882  *hintmsg = time_units_hint;
2883  }
2884  return false;
2885  }
2886  }
2887 
2888  /* Round to int, then check for overflow */
2889  val = rint(val);
2890 
2891  if (val > INT_MAX || val < INT_MIN)
2892  {
2893  if (hintmsg)
2894  *hintmsg = gettext_noop("Value exceeds integer range.");
2895  return false;
2896  }
2897 
2898  if (result)
2899  *result = (int) val;
2900  return true;
2901 }
gettext_noop
#define gettext_noop(x)
Definition: c.h:1204
memory_units_hint
static const char * memory_units_hint
Definition: guc.c:115
convert_to_base_unit
static bool convert_to_base_unit(double value, const char *unit, int base_unit, double *base_value)
Definition: guc.c:2624
time_units_hint
static const char * time_units_hint
Definition: guc.c:152
GUC_UNIT
#define GUC_UNIT
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 2914 of file guc.c.

2915 {
2916  double val;
2917  char *endptr;
2918 
2919  /* To suppress compiler warnings, always set output params */
2920  if (result)
2921  *result = 0;
2922  if (hintmsg)
2923  *hintmsg = NULL;
2924 
2925  errno = 0;
2926  val = strtod(value, &endptr);
2927 
2928  if (endptr == value || errno == ERANGE)
2929  return false; /* no HINT for these cases */
2930 
2931  /* reject NaN (infinities will fail range checks later) */
2932  if (isnan(val))
2933  return false; /* treat same as syntax error; no HINT */
2934 
2935  /* allow whitespace between number and unit */
2936  while (isspace((unsigned char) *endptr))
2937  endptr++;
2938 
2939  /* Handle possible unit */
2940  if (*endptr != '\0')
2941  {
2942  if ((flags & GUC_UNIT) == 0)
2943  return false; /* this setting does not accept a unit */
2944 
2945  if (!convert_to_base_unit(val,
2946  endptr, (flags & GUC_UNIT),
2947  &val))
2948  {
2949  /* invalid unit, or garbage after the unit; set hint and fail. */
2950  if (hintmsg)
2951  {
2952  if (flags & GUC_UNIT_MEMORY)
2953  *hintmsg = memory_units_hint;
2954  else
2955  *hintmsg = time_units_hint;
2956  }
2957  return false;
2958  }
2959  }
2960 
2961  if (result)
2962  *result = val;
2963  return true;
2964 }

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(), 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 
)

◆ 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 
)

Referenced by ProcessConfigFileInternal().

◆ ParseConfigFp()

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

Referenced by AlterSystemSetConfigFile(), and parse_extension_control_file().

◆ ParseLongOption()

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

Definition at line 6186 of file guc.c.

6187 {
6188  size_t equal_pos;
6189  char *cp;
6190 
6191  Assert(string);
6192  Assert(name);
6193  Assert(value);
6194 
6195  equal_pos = strcspn(string, "=");
6196 
6197  if (string[equal_pos] == '=')
6198  {
6199  *name = palloc(equal_pos + 1);
6200  strlcpy(*name, string, equal_pos + 1);
6201 
6202  *value = pstrdup(&string[equal_pos + 1]);
6203  }
6204  else
6205  {
6206  /* no equal sign in string */
6207  *name = pstrdup(string);
6208  *value = NULL;
6209  }
6210 
6211  for (cp = *name; *cp; cp++)
6212  if (*cp == '-')
6213  *cp = '_';
6214 }
palloc
void * palloc(Size size)
Definition: mcxt.c:1226
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 ProcessGUCArray().

◆ ProcessConfigFile()

void ProcessConfigFile ( GucContext  context)

Referenced by ApplyLauncherMain(), autoprewarm_main(), CheckpointWriteDelay(), do_autovacuum(), HandleAutoVacLauncherInterrupts(), HandleCheckpointerInterrupts(), HandleMainLoopInterrupts(), HandlePgArchInterrupts(), HandleWalWriterInterrupts(), LogicalRepApplyLoop(), PostgresMain(), process_pm_reload_request(), ProcessParallelApplyInterrupts(), ProcessPendingWrites(), SelectConfigFiles(), StartupRereadConfig(), SysLoggerMain(), vacuum_delay_point(), WalReceiverMain(), WalSndLoop(), WalSndWaitForWal(), and worker_spi_main().

◆ ProcessGUCArray()

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

Definition at line 6224 of file guc.c.

6226 {
6227  int i;
6228 
6229  Assert(array != NULL);
6230  Assert(ARR_ELEMTYPE(array) == TEXTOID);
6231  Assert(ARR_NDIM(array) == 1);
6232  Assert(ARR_LBOUND(array)[0] == 1);
6233 
6234  for (i = 1; i <= ARR_DIMS(array)[0]; i++)
6235  {
6236  Datum d;
6237  bool isnull;
6238  char *s;
6239  char *name;
6240  char *value;
6241 
6242  d = array_ref(array, 1, &i,
6243  -1 /* varlenarray */ ,
6244  -1 /* TEXT's typlen */ ,
6245  false /* TEXT's typbyval */ ,
6246  TYPALIGN_INT /* TEXT's typalign */ ,
6247  &isnull);
6248 
6249  if (isnull)
6250  continue;
6251 
6252  s = TextDatumGetCString(d);
6253 
6254  ParseLongOption(s, &name, &value);
6255  if (!value)
6256  {
6257  ereport(WARNING,
6258  (errcode(ERRCODE_SYNTAX_ERROR),
6259  errmsg("could not parse setting for parameter \"%s\"",
6260  name)));
6261  pfree(name);
6262  continue;
6263  }
6264 
6265  (void) set_config_option(name, value,
6266  context, source,
6267  action, true, 0, false);
6268 
6269  pfree(name);
6270  pfree(value);
6271  pfree(s);
6272  }
6273 }
ParseLongOption
void ParseLongOption(const char *string, char **name, char **value)
Definition: guc.c:6186
source
static rewind_source * source
Definition: pg_rewind.c:87

References generate_unaccent_rules::action, ARR_DIMS, ARR_ELEMTYPE, ARR_LBOUND, ARR_NDIM, array_ref(), Assert(), ereport, errcode(), errmsg(), i, name, ParseLongOption(), pfree(), set_config_option(), source, TextDatumGetCString, value, and WARNING.

Referenced by ApplySetting(), fmgr_security_definer(), and ProcedureCreate().

◆ ReportChangedGUCOptions()

void ReportChangedGUCOptions ( void  )

Definition at line 2549 of file guc.c.

2550 {
2551  slist_mutable_iter iter;
2552 
2553  /* Quick exit if not (yet) enabled */
2554  if (!reporting_enabled)
2555  return;
2556 
2557  /*
2558  * Since in_hot_standby isn't actually changed by normal GUC actions, we
2559  * need a hack to check whether a new value needs to be reported to the
2560  * client. For speed, we rely on the assumption that it can never
2561  * transition from false to true.
2562  */
2563  if (in_hot_standby_guc && !RecoveryInProgress())
2564  SetConfigOption("in_hot_standby", "false",
2565  PGC_INTERNAL, PGC_S_OVERRIDE);
2566 
2567  /* Transmit new values of interesting variables */
2568  slist_foreach_modify(iter, &guc_report_list)
2569  {
2570  struct config_generic *conf = slist_container(struct config_generic,
2571  report_link, iter.cur);
2572 
2573  Assert((conf->flags & GUC_REPORT) && (conf->status & GUC_NEEDS_REPORT));
2574  ReportGUCOption(conf);
2575  conf->status &= ~GUC_NEEDS_REPORT;
2576  slist_delete_current(&iter);
2577  }
2578 }
in_hot_standby_guc
bool in_hot_standby_guc
Definition: guc_tables.c:613

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 1969 of file guc.c.

1970 {
1971  dlist_mutable_iter iter;
1972 
1973  /* We need only consider GUCs not already at PGC_S_DEFAULT */
1974  dlist_foreach_modify(iter, &guc_nondef_list)
1975  {
1976  struct config_generic *gconf = dlist_container(struct config_generic,
1977  nondef_link, iter.cur);
1978 
1979  /* Don't reset non-SET-able values */
1980  if (gconf->context != PGC_SUSET &&
1981  gconf->context != PGC_USERSET)
1982  continue;
1983  /* Don't reset if special exclusion from RESET ALL */
1984  if (gconf->flags & GUC_NO_RESET_ALL)
1985  continue;
1986  /* No need to reset if wasn't SET */
1987  if (gconf->source <= PGC_S_OVERRIDE)
1988  continue;
1989 
1990  /* Save old value to support transaction abort */
1991  push_old_value(gconf, GUC_ACTION_SET);
1992 
1993  switch (gconf->vartype)
1994  {
1995  case PGC_BOOL:
1996  {
1997  struct config_bool *conf = (struct config_bool *) gconf;
1998 
1999  if (conf->assign_hook)
2000  conf->assign_hook(conf->reset_val,
2001  conf->reset_extra);
2002  *conf->variable = conf->reset_val;
2003  set_extra_field(&conf->gen, &conf->gen.extra,
2004  conf->reset_extra);
2005  break;
2006  }
2007  case PGC_INT:
2008  {
2009  struct config_int *conf = (struct config_int *) gconf;
2010 
2011  if (conf->assign_hook)
2012  conf->assign_hook(conf->reset_val,
2013  conf->reset_extra);
2014  *conf->variable = conf->reset_val;
2015  set_extra_field(&conf->gen, &conf->gen.extra,
2016  conf->reset_extra);
2017  break;
2018  }
2019  case PGC_REAL:
2020  {
2021  struct config_real *conf = (struct config_real *) gconf;
2022 
2023  if (conf->assign_hook)
2024  conf->assign_hook(conf->reset_val,
2025  conf->reset_extra);
2026  *conf->variable = conf->reset_val;
2027  set_extra_field(&conf->gen, &conf->gen.extra,
2028  conf->reset_extra);
2029  break;
2030  }
2031  case PGC_STRING:
2032  {
2033  struct config_string *conf = (struct config_string *) gconf;
2034 
2035  if (conf->assign_hook)
2036  conf->assign_hook(conf->reset_val,
2037  conf->reset_extra);
2038  set_string_field(conf, conf->variable, conf->reset_val);
2039  set_extra_field(&conf->gen, &conf->gen.extra,
2040  conf->reset_extra);
2041  break;
2042  }
2043  case PGC_ENUM:
2044  {
2045  struct config_enum *conf = (struct config_enum *) gconf;
2046 
2047  if (conf->assign_hook)
2048  conf->assign_hook(conf->reset_val,
2049  conf->reset_extra);
2050  *conf->variable = conf->reset_val;
2051  set_extra_field(&conf->gen, &conf->gen.extra,
2052  conf->reset_extra);
2053  break;
2054  }
2055  }
2056 
2057  set_guc_source(gconf, gconf->reset_source);
2058  gconf->scontext = gconf->reset_scontext;
2059  gconf->srole = gconf->reset_srole;
2060 
2061  if ((gconf->flags & GUC_REPORT) && !(gconf->status & GUC_NEEDS_REPORT))
2062  {
2063  gconf->status |= GUC_NEEDS_REPORT;
2064  slist_push_head(&guc_report_list, &gconf->report_link);
2065  }
2066  }
2067 }
push_old_value
static void push_old_value(struct config_generic *gconf, GucAction action)
Definition: guc.c:2100
GUC_NO_RESET_ALL
#define GUC_NO_RESET_ALL
Definition: guc.h:212
dlist_foreach_modify
#define dlist_foreach_modify(iter, lhead)
Definition: ilist.h:640
config_bool::reset_extra
void * reset_extra
Definition: guc_tables.h:208
config_bool::reset_val
bool reset_val
Definition: guc_tables.h:207
config_enum::reset_val
int reset_val
Definition: guc_tables.h:268
config_enum::reset_extra
void * reset_extra
Definition: guc_tables.h:269
config_generic::reset_scontext
GucContext reset_scontext
Definition: guc_tables.h:167
config_generic::reset_srole
Oid reset_srole
Definition: guc_tables.h:169
config_generic::source
GucSource source
Definition: guc_tables.h:164
config_generic::reset_source
GucSource reset_source
Definition: guc_tables.h:165
config_int::reset_extra
void * reset_extra
Definition: guc_tables.h:224
config_int::reset_val
int reset_val
Definition: guc_tables.h:223
config_real::reset_extra
void * reset_extra
Definition: guc_tables.h:240
config_real::reset_val
double reset_val
Definition: guc_tables.h:239
config_string::reset_val
char * reset_val
Definition: guc_tables.h:253
config_string::reset_extra
void * reset_extra
Definition: guc_tables.h:254
dlist_mutable_iter
Definition: ilist.h:199
dlist_mutable_iter::cur
dlist_node * cur
Definition: ilist.h:200

References 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, config_bool::gen, config_int::gen, config_real::gen, config_string::gen, config_enum::gen, 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_bool::reset_extra, config_int::reset_extra, config_real::reset_extra, config_string::reset_extra, config_enum::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 6017 of file guc.c.

6018 {
6019  char *varname,
6020  *varvalue,
6021  *varsourcefile;
6022  int varsourceline;
6023  GucSource varsource;
6024  GucContext varscontext;
6025  Oid varsrole;
6026  char *srcptr = (char *) gucstate;
6027  char *srcend;
6028  Size len;
6029  dlist_mutable_iter iter;
6030  ErrorContextCallback error_context_callback;
6031 
6032  /*
6033  * First, ensure that all potentially-shippable GUCs are reset to their
6034  * default values. We must not touch those GUCs that the leader will
6035  * never ship, while there is no need to touch those that are shippable
6036  * but already have their default values. Thus, this ends up being the
6037  * same test that SerializeGUCState uses, even though the sets of
6038  * variables involved may well be different since the leader's set of
6039  * variables-not-at-default-values can differ from the set that are
6040  * not-default in this freshly started worker.
6041  *
6042  * Once we have set all the potentially-shippable GUCs to default values,
6043  * restoring the GUCs that the leader sent (because they had non-default
6044  * values over there) leads us to exactly the set of GUC values that the
6045  * leader has. This is true even though the worker may have initially
6046  * absorbed postgresql.conf settings that the leader hasn't yet seen, or
6047  * ALTER USER/DATABASE SET settings that were established after the leader
6048  * started.
6049  *
6050  * Note that ensuring all the potential target GUCs are at PGC_S_DEFAULT
6051  * also ensures that set_config_option won't refuse to set them because of
6052  * source-priority comparisons.
6053  */
6054  dlist_foreach_modify(iter, &guc_nondef_list)
6055  {
6056  struct config_generic *gconf = dlist_container(struct config_generic,
6057  nondef_link, iter.cur);
6058 
6059  /* Do nothing if non-shippable or if already at PGC_S_DEFAULT. */
6060  if (can_skip_gucvar(gconf))
6061  continue;
6062 
6063  /*
6064  * We can use InitializeOneGUCOption to reset the GUC to default, but
6065  * first we must free any existing subsidiary data to avoid leaking
6066  * memory. The stack must be empty, but we have to clean up all other
6067  * fields. Beware that there might be duplicate value or "extra"
6068  * pointers. We also have to be sure to take it out of any lists it's
6069  * in.
6070  */
6071  Assert(gconf->stack == NULL);
6072  guc_free(gconf->extra);
6073  guc_free(gconf->last_reported);
6074  guc_free(gconf->sourcefile);
6075  switch (gconf->vartype)
6076  {
6077  case PGC_BOOL:
6078  {
6079  struct config_bool *conf = (struct config_bool *) gconf;
6080 
6081  if (conf->reset_extra && conf->reset_extra != gconf->extra)
6082  guc_free(conf->reset_extra);
6083  break;
6084  }
6085  case PGC_INT:
6086  {
6087  struct config_int *conf = (struct config_int *) gconf;
6088 
6089  if (conf->reset_extra && conf->reset_extra != gconf->extra)
6090  guc_free(conf->reset_extra);
6091  break;
6092  }
6093  case PGC_REAL:
6094  {
6095  struct config_real *conf = (struct config_real *) gconf;
6096 
6097  if (conf->reset_extra && conf->reset_extra != gconf->extra)
6098  guc_free(conf->reset_extra);
6099  break;
6100  }
6101  case PGC_STRING:
6102  {
6103  struct config_string *conf = (struct config_string *) gconf;
6104 
6105  guc_free(*conf->variable);
6106  if (conf->reset_val && conf->reset_val != *conf->variable)
6107  guc_free(conf->reset_val);
6108  if (conf->reset_extra && conf->reset_extra != gconf->extra)
6109  guc_free(conf->reset_extra);
6110  break;
6111  }
6112  case PGC_ENUM:
6113  {
6114  struct config_enum *conf = (struct config_enum *) gconf;
6115 
6116  if (conf->reset_extra && conf->reset_extra != gconf->extra)
6117  guc_free(conf->reset_extra);
6118  break;
6119  }
6120  }
6121  /* Remove it from any lists it's in. */
6122  RemoveGUCFromLists(gconf);
6123  /* Now we can reset the struct to PGS_S_DEFAULT state. */
6124  InitializeOneGUCOption(gconf);
6125  }
6126 
6127  /* First item is the length of the subsequent data */
6128  memcpy(&len, gucstate, sizeof(len));
6129 
6130  srcptr += sizeof(len);
6131  srcend = srcptr + len;
6132 
6133  /* If the GUC value check fails, we want errors to show useful context. */
6134  error_context_callback.callback = guc_restore_error_context_callback;
6135  error_context_callback.previous = error_context_stack;
6136  error_context_callback.arg = NULL;
6137  error_context_stack = &error_context_callback;
6138 
6139  /* Restore all the listed GUCs. */
6140  while (srcptr < srcend)
6141  {
6142  int result;
6143  char *error_context_name_and_value[2];
6144 
6145  varname = read_gucstate(&srcptr, srcend);
6146  varvalue = read_gucstate(&srcptr, srcend);
6147  varsourcefile = read_gucstate(&srcptr, srcend);
6148  if (varsourcefile[0])
6149  read_gucstate_binary(&srcptr, srcend,
6150  &varsourceline, sizeof(varsourceline));
6151  else
6152  varsourceline = 0;
6153  read_gucstate_binary(&srcptr, srcend,
6154  &varsource, sizeof(varsource));
6155  read_gucstate_binary(&srcptr, srcend,
6156  &varscontext, sizeof(varscontext));
6157  read_gucstate_binary(&srcptr, srcend,
6158  &varsrole, sizeof(varsrole));
6159 
6160  error_context_name_and_value[0] = varname;
6161  error_context_name_and_value[1] = varvalue;
6162  error_context_callback.arg = &error_context_name_and_value[0];
6163  result = set_config_option_ext(varname, varvalue,
6164  varscontext, varsource, varsrole,
6165  GUC_ACTION_SET, true, ERROR, true);
6166  if (result <= 0)
6167  ereport(ERROR,
6168  (errcode(ERRCODE_INTERNAL_ERROR),
6169  errmsg("parameter \"%s\" could not be set", varname)));
6170  if (varsourcefile[0])
6171  set_config_sourcefile(varname, varsourcefile, varsourceline);
6172  error_context_callback.arg = NULL;
6173  }
6174 
6175  error_context_stack = error_context_callback.previous;
6176 }
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:5995
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:3324
set_config_sourcefile
static void set_config_sourcefile(const char *name, char *sourcefile, int sourceline)
Definition: guc.c:4143
read_gucstate
static char * read_gucstate(char **srcptr, char *srcend)
Definition: guc.c:5958
can_skip_gucvar
static bool can_skip_gucvar(struct config_generic *gconf)
Definition: guc.c:5632
read_gucstate_binary
static void read_gucstate_binary(char **srcptr, char *srcend, void *dest, Size size)
Definition: guc.c:5981
ErrorContextCallback::previous
struct ErrorContextCallback * previous
Definition: elog.h:295
ErrorContextCallback::callback
void(* callback)(void *arg)
Definition: elog.h:296
config_generic::last_reported
char * last_reported
Definition: guc_tables.h:178
config_generic::sourcefile
char * sourcefile
Definition: guc_tables.h:180

References 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_bool::reset_extra, config_int::reset_extra, config_real::reset_extra, config_string::reset_extra, config_enum::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().

◆ SelectConfigFiles()

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

Definition at line 1749 of file guc.c.

1750 {
1751  char *configdir;
1752  char *fname;
1753  bool fname_is_malloced;
1754  struct stat stat_buf;
1755  struct config_string *data_directory_rec;
1756 
1757  /* configdir is -D option, or $PGDATA if no -D */
1758  if (userDoption)
1759  configdir = make_absolute_path(userDoption);
1760  else
1761  configdir = make_absolute_path(getenv("PGDATA"));
1762 
1763  if (configdir && stat(configdir, &stat_buf) != 0)
1764  {
1765  write_stderr("%s: could not access directory \"%s\": %s\n",
1766  progname,
1767  configdir,
1768  strerror(errno));
1769  if (errno == ENOENT)
1770  write_stderr("Run initdb or pg_basebackup to initialize a PostgreSQL data directory.\n");
1771  return false;
1772  }
1773 
1774  /*
1775  * Find the configuration file: if config_file was specified on the
1776  * command line, use it, else use configdir/postgresql.conf. In any case
1777  * ensure the result is an absolute path, so that it will be interpreted
1778  * the same way by future backends.
1779  */
1780  if (ConfigFileName)
1781  {
1782  fname = make_absolute_path(ConfigFileName);
1783  fname_is_malloced = true;
1784  }
1785  else if (configdir)
1786  {
1787  fname = guc_malloc(FATAL,
1788  strlen(configdir) + strlen(CONFIG_FILENAME) + 2);
1789  sprintf(fname, "%s/%s", configdir, CONFIG_FILENAME);
1790  fname_is_malloced = false;
1791  }
1792  else
1793  {
1794  write_stderr("%s does not know where to find the server configuration file.\n"
1795  "You must specify the --config-file or -D invocation "
1796  "option or set the PGDATA environment variable.\n",
1797  progname);
1798  return false;
1799  }
1800 
1801  /*
1802  * Set the ConfigFileName GUC variable to its final value, ensuring that
1803  * it can't be overridden later.
1804  */
1805  SetConfigOption("config_file", fname, PGC_POSTMASTER, PGC_S_OVERRIDE);
1806 
1807  if (fname_is_malloced)
1808  free(fname);
1809  else
1810  guc_free(fname);
1811 
1812  /*
1813  * Now read the config file for the first time.
1814  */
1815  if (stat(ConfigFileName, &stat_buf) != 0)
1816  {
1817  write_stderr("%s: could not access the server configuration file \"%s\": %s\n",
1818  progname, ConfigFileName, strerror(errno));
1819  free(configdir);
1820  return false;
1821  }
1822 
1823  /*
1824  * Read the configuration file for the first time. This time only the
1825  * data_directory parameter is picked up to determine the data directory,
1826  * so that we can read the PG_AUTOCONF_FILENAME file next time.
1827  */
1828  ProcessConfigFile(PGC_POSTMASTER);
1829 
1830  /*
1831  * If the data_directory GUC variable has been set, use that as DataDir;
1832  * otherwise use configdir if set; else punt.
1833  *
1834  * Note: SetDataDir will copy and absolute-ize its argument, so we don't
1835  * have to.
1836  */
1837  data_directory_rec = (struct config_string *)
1838  find_option("data_directory", false, false, PANIC);
1839  if (*data_directory_rec->variable)
1840  SetDataDir(*data_directory_rec->variable);
1841  else if (configdir)
1842  SetDataDir(configdir);
1843  else
1844  {
1845  write_stderr("%s does not know where to find the database system data.\n"
1846  "This can be specified as \"data_directory\" in \"%s\", "
1847  "or by the -D invocation option, or by the "
1848  "PGDATA environment variable.\n",
1849  progname, ConfigFileName);
1850  return false;
1851  }
1852 
1853  /*
1854  * Reflect the final DataDir value back into the data_directory GUC var.
1855  * (If you are wondering why we don't just make them a single variable,
1856  * it's because the EXEC_BACKEND case needs DataDir to be transmitted to
1857  * child backends specially. XXX is that still true? Given that we now
1858  * chdir to DataDir, EXEC_BACKEND can read the config file without knowing
1859  * DataDir in advance.)
1860  */
1861  SetConfigOption("data_directory", DataDir, PGC_POSTMASTER, PGC_S_OVERRIDE);
1862 
1863  /*
1864  * Now read the config file a second time, allowing any settings in the
1865  * PG_AUTOCONF_FILENAME file to take effect. (This is pretty ugly, but
1866  * since we have to determine the DataDir before we can find the autoconf
1867  * file, the alternatives seem worse.)
1868  */
1869  ProcessConfigFile(PGC_POSTMASTER);
1870 
1871  /*
1872  * If timezone_abbreviations wasn't set in the configuration file, install
1873  * the default value. We do it this way because we can't safely install a
1874  * "real" value until my_exec_path is set, which may not have happened
1875  * when InitializeGUCOptions runs, so the bootstrap default value cannot
1876  * be the real desired default.
1877  */
1878  pg_timezone_abbrev_initialize();
1879 
1880  /*
1881  * Figure out where pg_hba.conf is, and make sure the path is absolute.
1882  */
1883  if (HbaFileName)
1884  {
1885  fname = make_absolute_path(HbaFileName);
1886  fname_is_malloced = true;
1887  }
1888  else if (configdir)
1889  {
1890  fname = guc_malloc(FATAL,
1891  strlen(configdir) + strlen(HBA_FILENAME) + 2);
1892  sprintf(fname, "%s/%s", configdir, HBA_FILENAME);
1893  fname_is_malloced = false;
1894  }
1895  else
1896  {
1897  write_stderr("%s does not know where to find the \"hba\" configuration file.\n"
1898  "This can be specified as \"hba_file\" in \"%s\", "
1899  "or by the -D invocation option, or by the "
1900  "PGDATA environment variable.\n",
1901  progname, ConfigFileName);
1902  return false;
1903  }
1904  SetConfigOption("hba_file", fname, PGC_POSTMASTER, PGC_S_OVERRIDE);
1905 
1906  if (fname_is_malloced)
1907  free(fname);
1908  else
1909  guc_free(fname);
1910 
1911  /*
1912  * Likewise for pg_ident.conf.
1913  */
1914  if (IdentFileName)
1915  {
1916  fname = make_absolute_path(IdentFileName);
1917  fname_is_malloced = true;
1918  }
1919  else if (configdir)
1920  {
1921  fname = guc_malloc(FATAL,
1922  strlen(configdir) + strlen(IDENT_FILENAME) + 2);
1923  sprintf(fname, "%s/%s", configdir, IDENT_FILENAME);
1924  fname_is_malloced = false;
1925  }
1926  else
1927  {
1928  write_stderr("%s does not know where to find the \"ident\" configuration file.\n"
1929  "This can be specified as \"ident_file\" in \"%s\", "
1930  "or by the -D invocation option, or by the "
1931  "PGDATA environment variable.\n",
1932  progname, ConfigFileName);
1933  return false;
1934  }
1935  SetConfigOption("ident_file", fname, PGC_POSTMASTER, PGC_S_OVERRIDE);
1936 
1937  if (fname_is_malloced)
1938  free(fname);
1939  else
1940  guc_free(fname);
1941 
1942  free(configdir);
1943 
1944  return true;
1945 }
write_stderr
#define write_stderr(str)
Definition: parallel.c:184
FATAL
#define FATAL
Definition: elog.h:41
PANIC
#define PANIC
Definition: elog.h:42
DataDir
char * DataDir
Definition: globals.c:66
pg_timezone_abbrev_initialize
static void pg_timezone_abbrev_initialize(void)
Definition: guc.c:1958
IDENT_FILENAME
#define IDENT_FILENAME
Definition: guc.c:56
HBA_FILENAME
#define HBA_FILENAME
Definition: guc.c:55
CONFIG_FILENAME
#define CONFIG_FILENAME
Definition: guc.c:54
ProcessConfigFile
void ProcessConfigFile(GucContext context)
HbaFileName
char * HbaFileName
Definition: guc_tables.c:529
ConfigFileName
char * ConfigFileName
Definition: guc_tables.c:528
IdentFileName
char * IdentFileName
Definition: guc_tables.c:530
free
#define free(a)
Definition: header.h:65
progname
const char * progname
Definition: main.c:45
SetDataDir
void SetDataDir(const char *dir)
Definition: miscinit.c:429
make_absolute_path
char * make_absolute_path(const char *path)
Definition: path.c:729
sprintf
#define sprintf
Definition: port.h:240
strerror
#define strerror
Definition: port.h:251
userDoption
static const char * userDoption
Definition: postgres.c:159

References 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, strerror, userDoption, config_string::variable, and write_stderr.

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

◆ SerializeGUCState()

void SerializeGUCState ( Size  maxsize,
char *  start_address 
)

Definition at line 5925 of file guc.c.

5926 {
5927  char *curptr;
5928  Size actual_size;
5929  Size bytes_left;
5930  dlist_iter iter;
5931 
5932  /* Reserve space for saving the actual size of the guc state */
5933  Assert(maxsize > sizeof(actual_size));
5934  curptr = start_address + sizeof(actual_size);
5935  bytes_left = maxsize - sizeof(actual_size);
5936 
5937  /* We need only consider GUCs with source not PGC_S_DEFAULT */
5938  dlist_foreach(iter, &guc_nondef_list)
5939  {
5940  struct config_generic *gconf = dlist_container(struct config_generic,
5941  nondef_link, iter.cur);
5942 
5943  serialize_variable(&curptr, &bytes_left, gconf);
5944  }
5945 
5946  /* Store actual size without assuming alignment of start_address. */
5947  actual_size = maxsize - bytes_left - sizeof(actual_size);
5948  memcpy(start_address, &actual_size, sizeof(actual_size));
5949 }
serialize_variable
static void serialize_variable(char **destptr, Size *maxbytes, struct config_generic *gconf)
Definition: guc.c:5848

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 3284 of file guc.c.

3288 {
3289  Oid srole;
3290 
3291  /*
3292  * Non-interactive sources should be treated as having all privileges,
3293  * except for PGC_S_CLIENT. Note in particular that this is true for
3294  * pg_db_role_setting sources (PGC_S_GLOBAL etc): we assume a suitable
3295  * privilege check was done when the pg_db_role_setting entry was made.
3296  */
3297  if (source >= PGC_S_INTERACTIVE || source == PGC_S_CLIENT)
3298  srole = GetUserId();
3299  else
3300  srole = BOOTSTRAP_SUPERUSERID;
3301 
3302  return set_config_option_ext(name, value,
3303  context, source, srole,
3304  action, changeVal, elevel,
3305  is_reload);
3306 }

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

Referenced by applyRemoteGucs(), CreateSchemaCommand(), DefineIndex(), ExecSetVariableStmt(), execute_extension_script(), parse_subscription_options(), ProcessConfigFileInternal(), ProcessGUCArray(), 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 3324 of file guc.c.

3328 {
3329  struct config_generic *record;
3330  union config_var_val newval_union;
3331  void *newextra = NULL;
3332  bool prohibitValueChange = false;
3333  bool makeDefault;
3334 
3335  if (elevel == 0)
3336  {
3337  if (source == PGC_S_DEFAULT || source == PGC_S_FILE)
3338  {
3339  /*
3340  * To avoid cluttering the log, only the postmaster bleats loudly
3341  * about problems with the config file.
3342  */
3343  elevel = IsUnderPostmaster ? DEBUG3 : LOG;
3344  }
3345  else if (source == PGC_S_GLOBAL ||
3346  source == PGC_S_DATABASE ||
3347  source == PGC_S_USER ||
3348  source == PGC_S_DATABASE_USER)
3349  elevel = WARNING;
3350  else
3351  elevel = ERROR;
3352  }
3353 
3354  /*
3355  * GUC_ACTION_SAVE changes are acceptable during a parallel operation,
3356  * because the current worker will also pop the change. We're probably
3357  * dealing with a function having a proconfig entry. Only the function's
3358  * body should observe the change, and peer workers do not share in the
3359  * execution of a function call started by this worker.
3360  *
3361  * Other changes might need to affect other workers, so forbid them.
3362  */
3363  if (IsInParallelMode() && changeVal && action != GUC_ACTION_SAVE)
3364  ereport(elevel,
3365  (errcode(ERRCODE_INVALID_TRANSACTION_STATE),
3366  errmsg("cannot set parameters during a parallel operation")));
3367 
3368  record = find_option(name, true, false, elevel);
3369  if (record == NULL)
3370  return 0;
3371 
3372  /*
3373  * Check if the option can be set at this time. See guc.h for the precise
3374  * rules.
3375  */
3376  switch (record->context)
3377  {
3378  case PGC_INTERNAL:
3379  if (context != PGC_INTERNAL)
3380  {
3381  ereport(elevel,
3382  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3383  errmsg("parameter \"%s\" cannot be changed",
3384  name)));
3385  return 0;
3386  }
3387  break;
3388  case PGC_POSTMASTER:
3389  if (context == PGC_SIGHUP)
3390  {
3391  /*
3392  * We are re-reading a PGC_POSTMASTER variable from
3393  * postgresql.conf. We can't change the setting, so we should
3394  * give a warning if the DBA tries to change it. However,
3395  * because of variant formats, canonicalization by check
3396  * hooks, etc, we can't just compare the given string directly
3397  * to what's stored. Set a flag to check below after we have
3398  * the final storable value.
3399  */
3400  prohibitValueChange = true;
3401  }
3402  else if (context != PGC_POSTMASTER)
3403  {
3404  ereport(elevel,
3405  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3406  errmsg("parameter \"%s\" cannot be changed without restarting the server",
3407  name)));
3408  return 0;
3409  }
3410  break;
3411  case PGC_SIGHUP:
3412  if (context != PGC_SIGHUP && context != PGC_POSTMASTER)
3413  {
3414  ereport(elevel,
3415  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3416  errmsg("parameter \"%s\" cannot be changed now",
3417  name)));
3418  return 0;
3419  }
3420 
3421  /*
3422  * Hmm, the idea of the SIGHUP context is "ought to be global, but
3423  * can be changed after postmaster start". But there's nothing
3424  * that prevents a crafty administrator from sending SIGHUP
3425  * signals to individual backends only.
3426  */
3427  break;
3428  case PGC_SU_BACKEND:
3429  if (context == PGC_BACKEND)
3430  {
3431  /*
3432  * Check whether the requesting user has been granted
3433  * privilege to set this GUC.
3434  */
3435  AclResult aclresult;
3436 
3437  aclresult = pg_parameter_aclcheck(name, srole, ACL_SET);
3438  if (aclresult != ACLCHECK_OK)
3439  {
3440  /* No granted privilege */
3441  ereport(elevel,
3442  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
3443  errmsg("permission denied to set parameter \"%s\"",
3444  name)));
3445  return 0;
3446  }
3447  }
3448  /* fall through to process the same as PGC_BACKEND */
3449  /* FALLTHROUGH */
3450  case PGC_BACKEND:
3451  if (context == PGC_SIGHUP)
3452  {
3453  /*
3454  * If a PGC_BACKEND or PGC_SU_BACKEND parameter is changed in
3455  * the config file, we want to accept the new value in the
3456  * postmaster (whence it will propagate to
3457  * subsequently-started backends), but ignore it in existing
3458  * backends. This is a tad klugy, but necessary because we
3459  * don't re-read the config file during backend start.
3460  *
3461  * In EXEC_BACKEND builds, this works differently: we load all
3462  * non-default settings from the CONFIG_EXEC_PARAMS file
3463  * during backend start. In that case we must accept
3464  * PGC_SIGHUP settings, so as to have the same value as if
3465  * we'd forked from the postmaster. This can also happen when
3466  * using RestoreGUCState() within a background worker that
3467  * needs to have the same settings as the user backend that
3468  * started it. is_reload will be true when either situation
3469  * applies.
3470  */
3471  if (IsUnderPostmaster && !is_reload)
3472  return -1;
3473  }
3474  else if (context != PGC_POSTMASTER &&
3475  context != PGC_BACKEND &&
3476  context != PGC_SU_BACKEND &&
3477  source != PGC_S_CLIENT)
3478  {
3479  ereport(elevel,
3480  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3481  errmsg("parameter \"%s\" cannot be set after connection start",
3482  name)));
3483  return 0;
3484  }
3485  break;
3486  case PGC_SUSET:
3487  if (context == PGC_USERSET || context == PGC_BACKEND)
3488  {
3489  /*
3490  * Check whether the requesting user has been granted
3491  * privilege to set this GUC.
3492  */
3493  AclResult aclresult;
3494 
3495  aclresult = pg_parameter_aclcheck(name, srole, ACL_SET);
3496  if (aclresult != ACLCHECK_OK)
3497  {
3498  /* No granted privilege */
3499  ereport(elevel,
3500  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
3501  errmsg("permission denied to set parameter \"%s\"",
3502  name)));
3503  return 0;
3504  }
3505  }
3506  break;
3507  case PGC_USERSET:
3508  /* always okay */
3509  break;
3510  }
3511 
3512  /*
3513  * Disallow changing GUC_NOT_WHILE_SEC_REST values if we are inside a
3514  * security restriction context. We can reject this regardless of the GUC
3515  * context or source, mainly because sources that it might be reasonable
3516  * to override for won't be seen while inside a function.
3517  *
3518  * Note: variables marked GUC_NOT_WHILE_SEC_REST should usually be marked
3519  * GUC_NO_RESET_ALL as well, because ResetAllOptions() doesn't check this.
3520  * An exception might be made if the reset value is assumed to be "safe".
3521  *
3522  * Note: this flag is currently used for "session_authorization" and
3523  * "role". We need to prohibit changing these inside a local userid
3524  * context because when we exit it, GUC won't be notified, leaving things
3525  * out of sync. (This could be fixed by forcing a new GUC nesting level,
3526  * but that would change behavior in possibly-undesirable ways.) Also, we
3527  * prohibit changing these in a security-restricted operation because
3528  * otherwise RESET could be used to regain the session user's privileges.
3529  */
3530  if (record->flags & GUC_NOT_WHILE_SEC_REST)
3531  {
3532  if (InLocalUserIdChange())
3533  {
3534  /*
3535  * Phrasing of this error message is historical, but it's the most
3536  * common case.
3537  */
3538  ereport(elevel,
3539  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
3540  errmsg("cannot set parameter \"%s\" within security-definer function",
3541  name)));
3542  return 0;
3543  }
3544  if (InSecurityRestrictedOperation())
3545  {
3546  ereport(elevel,
3547  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
3548  errmsg("cannot set parameter \"%s\" within security-restricted operation",
3549  name)));
3550  return 0;
3551  }
3552  }
3553 
3554  /* Disallow resetting and saving GUC_NO_RESET values */
3555  if (record->flags & GUC_NO_RESET)
3556  {
3557  if (value == NULL)
3558  {
3559  ereport(elevel,
3560  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3561  errmsg("parameter \"%s\" cannot be reset", name)));
3562  return 0;
3563  }
3564  if (action == GUC_ACTION_SAVE)
3565  {
3566  ereport(elevel,
3567  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3568  errmsg("parameter \"%s\" cannot be set locally in functions",
3569  name)));
3570  return 0;
3571  }
3572  }
3573 
3574  /*
3575  * Should we set reset/stacked values? (If so, the behavior is not
3576  * transactional.) This is done either when we get a default value from
3577  * the database's/user's/client's default settings or when we reset a
3578  * value to its default.
3579  */
3580  makeDefault = changeVal && (source <= PGC_S_OVERRIDE) &&
3581  ((value != NULL) || source == PGC_S_DEFAULT);
3582 
3583  /*
3584  * Ignore attempted set if overridden by previously processed setting.
3585  * However, if changeVal is false then plow ahead anyway since we are
3586  * trying to find out if the value is potentially good, not actually use
3587  * it. Also keep going if makeDefault is true, since we may want to set
3588  * the reset/stacked values even if we can't set the variable itself.
3589  */
3590  if (record->source > source)
3591  {
3592  if (changeVal && !makeDefault)
3593  {
3594  elog(DEBUG3, "\"%s\": setting ignored because previous source is higher priority",
3595  name);
3596  return -1;
3597  }
3598  changeVal = false;
3599  }
3600 
3601  /*
3602  * Evaluate value and set variable.
3603  */
3604  switch (record->vartype)
3605  {
3606  case PGC_BOOL:
3607  {
3608  struct config_bool *conf = (struct config_bool *) record;
3609 
3610 #define newval (newval_union.boolval)
3611 
3612  if (value)
3613  {
3614  if (!parse_and_validate_value(record, name, value,
3615  source, elevel,
3616  &newval_union, &newextra))
3617  return 0;
3618  }
3619  else if (source == PGC_S_DEFAULT)
3620  {
3621  newval = conf->boot_val;
3622  if (!call_bool_check_hook(conf, &newval, &newextra,
3623  source, elevel))
3624  return 0;
3625  }
3626  else
3627  {
3628  newval = conf->reset_val;
3629  newextra = conf->reset_extra;
3630  source = conf->gen.reset_source;
3631  context = conf->gen.reset_scontext;
3632  srole = conf->gen.reset_srole;
3633  }
3634 
3635  if (prohibitValueChange)
3636  {
3637  /* Release newextra, unless it's reset_extra */
3638  if (newextra && !extra_field_used(&conf->gen, newextra))
3639  guc_free(newextra);
3640 
3641  if (*conf->variable != newval)
3642  {
3643  record->status |= GUC_PENDING_RESTART;
3644  ereport(elevel,
3645  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3646  errmsg("parameter \"%s\" cannot be changed without restarting the server",
3647  name)));
3648  return 0;
3649  }
3650  record->status &= ~GUC_PENDING_RESTART;
3651  return -1;
3652  }
3653 
3654  if (changeVal)
3655  {
3656  /* Save old value to support transaction abort */
3657  if (!makeDefault)
3658  push_old_value(&conf->gen, action);
3659 
3660  if (conf->assign_hook)
3661  conf->assign_hook(newval, newextra);
3662  *conf->variable = newval;
3663  set_extra_field(&conf->gen, &conf->gen.extra,
3664  newextra);
3665  set_guc_source(&conf->gen, source);
3666  conf->gen.scontext = context;
3667  conf->gen.srole = srole;
3668  }
3669  if (makeDefault)
3670  {
3671  GucStack *stack;
3672 
3673  if (conf->gen.reset_source <= source)
3674  {
3675  conf->reset_val = newval;
3676  set_extra_field(&conf->gen, &conf->reset_extra,
3677  newextra);
3678  conf->gen.reset_source = source;
3679  conf->gen.reset_scontext = context;
3680  conf->gen.reset_srole = srole;
3681  }
3682  for (stack = conf->gen.stack; stack; stack = stack->prev)
3683  {
3684  if (stack->source <= source)
3685  {
3686  stack->prior.val.boolval = newval;
3687  set_extra_field(&conf->gen, &stack->prior.extra,
3688  newextra);
3689  stack->source = source;
3690  stack->scontext = context;
3691  stack->srole = srole;
3692  }
3693  }
3694  }
3695 
3696  /* Perhaps we didn't install newextra anywhere */
3697  if (newextra && !extra_field_used(&conf->gen, newextra))
3698  guc_free(newextra);
3699  break;
3700 
3701 #undef newval
3702  }
3703 
3704  case PGC_INT:
3705  {
3706  struct config_int *conf = (struct config_int *) record;
3707 
3708 #define newval (newval_union.intval)
3709 
3710  if (value)
3711  {
3712  if (!parse_and_validate_value(record, name, value,
3713  source, elevel,
3714  &newval_union, &newextra))
3715  return 0;
3716  }
3717  else if (source == PGC_S_DEFAULT)
3718  {
3719  newval = conf->boot_val;
3720  if (!call_int_check_hook(conf, &newval, &newextra,
3721  source, elevel))
3722  return 0;
3723  }
3724  else
3725  {
3726  newval = conf->reset_val;
3727  newextra = conf->reset_extra;
3728  source = conf->gen.reset_source;
3729  context = conf->gen.reset_scontext;
3730  srole = conf->gen.reset_srole;
3731  }
3732 
3733  if (prohibitValueChange)
3734  {
3735  /* Release newextra, unless it's reset_extra */
3736  if (newextra && !extra_field_used(&conf->gen, newextra))
3737  guc_free(newextra);
3738 
3739  if (*conf->variable != newval)
3740  {
3741  record->status |= GUC_PENDING_RESTART;
3742  ereport(elevel,
3743  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3744  errmsg("parameter \"%s\" cannot be changed without restarting the server",
3745  name)));
3746  return 0;
3747  }
3748  record->status &= ~GUC_PENDING_RESTART;
3749  return -1;
3750  }
3751 
3752  if (changeVal)
3753  {
3754  /* Save old value to support transaction abort */
3755  if (!makeDefault)
3756  push_old_value(&conf->gen, action);
3757 
3758  if (conf->assign_hook)
3759  conf->assign_hook(newval, newextra);
3760  *conf->variable = newval;
3761  set_extra_field(&conf->gen, &conf->gen.extra,
3762  newextra);
3763  set_guc_source(&conf->gen, source);
3764  conf->gen.scontext = context;
3765  conf->gen.srole = srole;
3766  }
3767  if (makeDefault)
3768  {
3769  GucStack *stack;
3770 
3771  if (conf->gen.reset_source <= source)
3772  {
3773  conf->reset_val = newval;
3774  set_extra_field(&conf->gen, &conf->reset_extra,
3775  newextra);
3776  conf->gen.reset_source = source;
3777  conf->gen.reset_scontext = context;
3778  conf->gen.reset_srole = srole;
3779  }
3780  for (stack = conf->gen.stack; stack; stack = stack->prev)
3781  {
3782  if (stack->source <= source)
3783  {
3784  stack->prior.val.intval = newval;
3785  set_extra_field(&conf->gen, &stack->prior.extra,
3786  newextra);
3787  stack->source = source;
3788  stack->scontext = context;
3789  stack->srole = srole;
3790  }
3791  }
3792  }
3793 
3794  /* Perhaps we didn't install newextra anywhere */
3795  if (newextra && !extra_field_used(&conf->gen, newextra))
3796  guc_free(newextra);
3797  break;
3798 
3799 #undef newval
3800  }
3801 
3802  case PGC_REAL:
3803  {
3804  struct config_real *conf = (struct config_real *) record;
3805 
3806 #define newval (newval_union.realval)
3807 
3808  if (value)
3809  {
3810  if (!parse_and_validate_value(record, name, value,
3811  source, elevel,
3812  &newval_union, &newextra))
3813  return 0;
3814  }
3815  else if (source == PGC_S_DEFAULT)
3816  {
3817  newval = conf->boot_val;
3818  if (!call_real_check_hook(conf, &newval, &newextra,
3819  source, elevel))
3820  return 0;
3821  }
3822  else
3823  {
3824  newval = conf->reset_val;
3825  newextra = conf->reset_extra;
3826  source = conf->gen.reset_source;
3827  context = conf->gen.reset_scontext;
3828  srole = conf->gen.reset_srole;
3829  }
3830 
3831  if (prohibitValueChange)
3832  {
3833  /* Release newextra, unless it's reset_extra */
3834  if (newextra && !extra_field_used(&conf->gen, newextra))
3835  guc_free(newextra);
3836 
3837  if (*conf->variable != newval)
3838  {
3839  record->status |= GUC_PENDING_RESTART;
3840  ereport(elevel,
3841  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3842  errmsg("parameter \"%s\" cannot be changed without restarting the server",
3843  name)));
3844  return 0;
3845  }
3846  record->status &= ~GUC_PENDING_RESTART;
3847  return -1;
3848  }
3849 
3850  if (changeVal)
3851  {
3852  /* Save old value to support transaction abort */
3853  if (!makeDefault)
3854  push_old_value(&conf->gen, action);
3855 
3856  if (conf->assign_hook)
3857  conf->assign_hook(newval, newextra);
3858  *conf->variable = newval;
3859  set_extra_field(&conf->gen, &conf->gen.extra,
3860  newextra);
3861  set_guc_source(&conf->gen, source);
3862  conf->gen.scontext = context;
3863  conf->gen.srole = srole;
3864  }
3865  if (makeDefault)
3866  {
3867  GucStack *stack;
3868 
3869  if (conf->gen.reset_source <= source)
3870  {
3871  conf->reset_val = newval;
3872  set_extra_field(&conf->gen, &conf->reset_extra,
3873  newextra);
3874  conf->gen.reset_source = source;
3875  conf->gen.reset_scontext = context;
3876  conf->gen.reset_srole = srole;
3877  }
3878  for (stack = conf->gen.stack; stack; stack = stack->prev)
3879  {
3880  if (stack->source <= source)
3881  {
3882  stack->prior.val.realval = newval;
3883  set_extra_field(&conf->gen, &stack->prior.extra,
3884  newextra);
3885  stack->source = source;
3886  stack->scontext = context;
3887  stack->srole = srole;
3888  }
3889  }
3890  }
3891 
3892  /* Perhaps we didn't install newextra anywhere */
3893  if (newextra && !extra_field_used(&conf->gen, newextra))
3894  guc_free(newextra);
3895  break;
3896 
3897 #undef newval
3898  }
3899 
3900  case PGC_STRING:
3901  {
3902  struct config_string *conf = (struct config_string *) record;
3903 
3904 #define newval (newval_union.stringval)
3905 
3906  if (value)
3907  {
3908  if (!parse_and_validate_value(record, name, value,
3909  source, elevel,
3910  &newval_union, &newextra))
3911  return 0;
3912  }
3913  else if (source == PGC_S_DEFAULT)
3914  {
3915  /* non-NULL boot_val must always get strdup'd */
3916  if (conf->boot_val != NULL)
3917  {
3918  newval = guc_strdup(elevel, conf->boot_val);
3919  if (newval == NULL)
3920  return 0;
3921  }
3922  else
3923  newval = NULL;
3924 
3925  if (!call_string_check_hook(conf, &newval, &newextra,
3926  source, elevel))
3927  {
3928  guc_free(newval);
3929  return 0;
3930  }
3931  }
3932  else
3933  {
3934  /*
3935  * strdup not needed, since reset_val is already under
3936  * guc.c's control
3937  */
3938  newval = conf->reset_val;
3939  newextra = conf->reset_extra;
3940  source = conf->gen.reset_source;
3941  context = conf->gen.reset_scontext;
3942  srole = conf->gen.reset_srole;
3943  }
3944 
3945  if (prohibitValueChange)
3946  {
3947  bool newval_different;
3948 
3949  /* newval shouldn't be NULL, so we're a bit sloppy here */
3950  newval_different = (*conf->variable == NULL ||
3951  newval == NULL ||
3952  strcmp(*conf->variable, newval) != 0);
3953 
3954  /* Release newval, unless it's reset_val */
3955  if (newval && !string_field_used(conf, newval))
3956  guc_free(newval);
3957  /* Release newextra, unless it's reset_extra */
3958  if (newextra && !extra_field_used(&conf->gen, newextra))
3959  guc_free(newextra);
3960 
3961  if (newval_different)
3962  {
3963  record->status |= GUC_PENDING_RESTART;
3964  ereport(elevel,
3965  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3966  errmsg("parameter \"%s\" cannot be changed without restarting the server",
3967  name)));
3968  return 0;
3969  }
3970  record->status &= ~GUC_PENDING_RESTART;
3971  return -1;
3972  }
3973 
3974  if (changeVal)
3975  {
3976  /* Save old value to support transaction abort */
3977  if (!makeDefault)
3978  push_old_value(&conf->gen, action);
3979 
3980  if (conf->assign_hook)
3981  conf->assign_hook(newval, newextra);
3982  set_string_field(conf, conf->variable, newval);
3983  set_extra_field(&conf->gen, &conf->gen.extra,
3984  newextra);
3985  set_guc_source(&conf->gen, source);
3986  conf->gen.scontext = context;
3987  conf->gen.srole = srole;
3988  }
3989 
3990  if (makeDefault)
3991  {
3992  GucStack *stack;
3993 
3994  if (conf->gen.reset_source <= source)
3995  {
3996  set_string_field(conf, &conf->reset_val, newval);
3997  set_extra_field(&conf->gen, &conf->reset_extra,
3998  newextra);
3999  conf->gen.reset_source = source;
4000  conf->gen.reset_scontext = context;
4001  conf->gen.reset_srole = srole;
4002  }
4003  for (stack = conf->gen.stack; stack; stack = stack->prev)
4004  {
4005  if (stack->source <= source)
4006  {
4007  set_string_field(conf, &stack->prior.val.stringval,
4008  newval);
4009  set_extra_field(&conf->gen, &stack->prior.extra,
4010  newextra);
4011  stack->source = source;
4012  stack->scontext = context;
4013  stack->srole = srole;
4014  }
4015  }
4016  }
4017 
4018  /* Perhaps we didn't install newval anywhere */
4019  if (newval && !string_field_used(conf, newval))
4020  guc_free(newval);
4021  /* Perhaps we didn't install newextra anywhere */
4022  if (newextra && !extra_field_used(&conf->gen, newextra))
4023  guc_free(newextra);
4024  break;
4025 
4026 #undef newval
4027  }
4028 
4029  case PGC_ENUM:
4030  {
4031  struct config_enum *conf = (struct config_enum *) record;
4032 
4033 #define newval (newval_union.enumval)
4034 
4035  if (value)
4036  {
4037  if (!parse_and_validate_value(record, name, value,
4038  source, elevel,
4039  &newval_union, &newextra))
4040  return 0;
4041  }
4042  else if (source == PGC_S_DEFAULT)
4043  {
4044  newval = conf->boot_val;
4045  if (!call_enum_check_hook(conf, &newval, &newextra,
4046  source, elevel))
4047  return 0;
4048  }
4049  else
4050  {
4051  newval = conf->reset_val;
4052  newextra = conf->reset_extra;
4053  source = conf->gen.reset_source;
4054  context = conf->gen.reset_scontext;
4055  srole = conf->gen.reset_srole;
4056  }
4057 
4058  if (prohibitValueChange)
4059  {
4060  /* Release newextra, unless it's reset_extra */
4061  if (newextra && !extra_field_used(&conf->gen, newextra))
4062  guc_free(newextra);
4063 
4064  if (*conf->variable != newval)
4065  {
4066  record->status |= GUC_PENDING_RESTART;
4067  ereport(elevel,
4068  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
4069  errmsg("parameter \"%s\" cannot be changed without restarting the server",
4070  name)));
4071  return 0;
4072  }
4073  record->status &= ~GUC_PENDING_RESTART;
4074  return -1;
4075  }
4076 
4077  if (changeVal)
4078  {
4079  /* Save old value to support transaction abort */
4080  if (!makeDefault)
4081  push_old_value(&conf->gen, action);
4082 
4083  if (conf->assign_hook)
4084  conf->assign_hook(newval, newextra);
4085  *conf->variable = newval;
4086  set_extra_field(&conf->gen, &conf->gen.extra,
4087  newextra);
4088  set_guc_source(&conf->gen, source);
4089  conf->gen.scontext = context;
4090  conf->gen.srole = srole;
4091  }
4092  if (makeDefault)
4093  {
4094  GucStack *stack;
4095 
4096  if (conf->gen.reset_source <= source)
4097  {
4098  conf->reset_val = newval;
4099  set_extra_field(&conf->gen, &conf->reset_extra,
4100  newextra);
4101  conf->gen.reset_source = source;
4102  conf->gen.reset_scontext = context;
4103  conf->gen.reset_srole = srole;
4104  }
4105  for (stack = conf->gen.stack; stack; stack = stack->prev)
4106  {
4107  if (stack->source <= source)
4108  {
4109  stack->prior.val.enumval = newval;
4110  set_extra_field(&conf->gen, &stack->prior.extra,
4111  newextra);
4112  stack->source = source;
4113  stack->scontext = context;
4114  stack->srole = srole;
4115  }
4116  }
4117  }
4118 
4119  /* Perhaps we didn't install newextra anywhere */
4120  if (newextra && !extra_field_used(&conf->gen, newextra))
4121  guc_free(newextra);
4122  break;
4123 
4124 #undef newval
4125  }
4126  }
4127 
4128  if (changeVal && (record->flags & GUC_REPORT) &&
4129  !(record->status & GUC_NEEDS_REPORT))
4130  {
4131  record->status |= GUC_NEEDS_REPORT;
4132  slist_push_head(&guc_report_list, &record->report_link);
4133  }
4134 
4135  return changeVal ? 1 : -1;
4136 }
DEBUG3
#define DEBUG3
Definition: elog.h:28
IsUnderPostmaster
bool IsUnderPostmaster
Definition: globals.c:113
call_string_check_hook
static bool call_string_check_hook(struct config_string *conf, char **newval, void **extra, GucSource source, int elevel)
Definition: guc.c:6693
extra_field_used
static bool extra_field_used(struct config_generic *gconf, void *extra)
Definition: guc.c:740
call_bool_check_hook
static void static bool call_bool_check_hook(struct config_bool *conf, bool *newval, void **extra, GucSource source, int elevel)
Definition: guc.c:6591
call_int_check_hook
static bool call_int_check_hook(struct config_int *conf, int *newval, void **extra, GucSource source, int elevel)
Definition: guc.c:6625
guc_strdup
char * guc_strdup(int elevel, const char *src)
Definition: guc.c:670
string_field_used
static bool string_field_used(struct config_string *conf, char *strval)
Definition: guc.c:701
call_real_check_hook
static bool call_real_check_hook(struct config_real *conf, double *newval, void **extra, GucSource source, int elevel)
Definition: guc.c:6659
call_enum_check_hook
static bool call_enum_check_hook(struct config_enum *conf, int *newval, void **extra, GucSource source, int elevel)
Definition: guc.c:6743
GUC_NO_RESET
#define GUC_NO_RESET
Definition: guc.h:211
GUC_NOT_WHILE_SEC_REST
#define GUC_NOT_WHILE_SEC_REST
Definition: guc.h:220
GUC_PENDING_RESTART
#define GUC_PENDING_RESTART
Definition: guc_tables.h:191
InSecurityRestrictedOperation
bool InSecurityRestrictedOperation(void)
Definition: miscinit.c:658
InLocalUserIdChange
bool InLocalUserIdChange(void)
Definition: miscinit.c:649
config_bool::boot_val
bool boot_val
Definition: guc_tables.h:202
config_enum::boot_val
int boot_val
Definition: guc_tables.h:262
config_int::boot_val
int boot_val
Definition: guc_tables.h:216
config_real::boot_val
double boot_val
Definition: guc_tables.h:232
config_string::boot_val
const char * boot_val
Definition: guc_tables.h:248

References 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_var_val::boolval, 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(), config_var_val::enumval, ereport, errcode(), errmsg(), ERROR, config_var_value::extra, config_generic::extra, extra_field_used(), find_option(), config_generic::flags, config_bool::gen, config_int::gen, config_real::gen, config_string::gen, config_enum::gen, GUC_ACTION_SAVE, 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(), config_var_val::intval, IsInParallelMode(), IsUnderPostmaster, LOG, 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_FILE, PGC_S_GLOBAL, PGC_S_OVERRIDE, PGC_S_USER, PGC_SIGHUP, PGC_STRING, PGC_SU_BACKEND, PGC_SUSET, PGC_USERSET, guc_stack::prev, guc_stack::prior, push_old_value(), config_var_val::realval, config_generic::report_link, config_bool::reset_extra, config_int::reset_extra, config_real::reset_extra, config_string::reset_extra, config_enum::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, guc_stack::scontext, config_generic::scontext, set_extra_field(), set_guc_source(), set_string_field(), slist_push_head(), source, guc_stack::source, config_generic::source, guc_stack::srole, config_generic::srole, config_generic::stack, config_generic::status, string_field_used(), config_var_val::stringval, config_var_value::val, value, config_bool::variable, config_int::variable, config_real::variable, config_string::variable, config_enum::variable, config_generic::vartype, and WARNING.

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

◆ SetConfigOption()

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

Definition at line 4176 of file guc.c.

4178 {
4179  (void) set_config_option(name, value, context, source,
4180  GUC_ACTION_SET, true, 0, false);
4181 }

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

Referenced by AutoVacLauncherMain(), AutoVacWorkerMain(), BeginReportingGUCOptions(), BootstrapModeMain(), CheckMyDatabase(), InitializeApplyWorker(), InitializeGUCOptions(), InitializeGUCOptionsFromEnvironment(), InitializeSessionUserId(), InitializeShmemGUCs(), maybe_reread_subscription(), pg_timezone_abbrev_initialize(), PostmasterMain(), process_postgres_switches(), process_startup_options(), ProcessConfigFileInternal(), ReadControlFile(), ReportChangedGUCOptions(), SelectConfigFiles(), set_debug_options(), set_limit(), set_plan_disabling_options(), SetCurrentRoleId(), SetSessionAuthorization(), and XLOGShmemSize().

◆ SetPGVariable()

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

Definition at line 315 of file guc_funcs.c.

316 {
317  char *argstring = flatten_set_variable_args(name, args);
318 
319  /* Note SET DEFAULT (argstring == NULL) is equivalent to RESET */
320  (void) set_config_option(name,
321  argstring,
322  (superuser() ? PGC_SUSET : PGC_USERSET),
323  PGC_S_SESSION,
324  is_local ? GUC_ACTION_LOCAL : GUC_ACTION_SET,
325  true, 0, false);
326 }
generate_unaccent_rules.args
args
Definition: generate_unaccent_rules.py:279

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().

Variable Documentation

◆ application_name

PGDLLIMPORT char* application_name
extern

Definition at line 535 of file guc_tables.c.

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

◆ backtrace_functions

PGDLLIMPORT char* backtrace_functions
extern

Definition at line 521 of file guc_tables.c.

Referenced by errfinish().

◆ check_function_bodies

PGDLLIMPORT bool check_function_bodies
extern

Definition at line 501 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 512 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 527 of file guc_tables.c.

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

◆ ConfigFileName

PGDLLIMPORT char* ConfigFileName
extern

Definition at line 528 of file guc_tables.c.

Referenced by ProcessConfigFileInternal(), and SelectConfigFiles().

◆ Debug_pretty_print

PGDLLIMPORT bool Debug_pretty_print
extern

Definition at line 490 of file guc_tables.c.

Referenced by pg_plan_query(), and pg_rewrite_query().

◆ Debug_print_parse

PGDLLIMPORT bool Debug_print_parse
extern

Definition at line 488 of file guc_tables.c.

Referenced by pg_rewrite_query().

◆ Debug_print_plan

PGDLLIMPORT bool Debug_print_plan
extern

Definition at line 487 of file guc_tables.c.

Referenced by pg_plan_query().

◆ Debug_print_rewritten

PGDLLIMPORT bool Debug_print_rewritten
extern

Definition at line 489 of file guc_tables.c.

Referenced by pg_rewrite_query().

◆ external_pid_file

PGDLLIMPORT char* external_pid_file
extern

Definition at line 531 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 75 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 76 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 74 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 529 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 530 of file guc_tables.c.

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

◆ log_btree_build_stats

PGDLLIMPORT bool log_btree_build_stats
extern

Definition at line 497 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 486 of file guc_tables.c.

Referenced by check_log_duration().

◆ log_executor_stats

PGDLLIMPORT bool log_executor_stats
extern

Definition at line 494 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 513 of file guc_tables.c.

Referenced by check_log_duration().

◆ log_min_duration_statement

PGDLLIMPORT int log_min_duration_statement
extern

Definition at line 514 of file guc_tables.c.

Referenced by check_log_duration().

◆ log_min_error_statement

PGDLLIMPORT int log_min_error_statement
extern

Definition at line 510 of file guc_tables.c.

Referenced by check_log_of_query().

◆ log_min_messages

PGDLLIMPORT int log_min_messages
extern

Definition at line 511 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 515 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 516 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 492 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 493 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 518 of file guc_tables.c.

Referenced by check_log_duration().

◆ log_statement_stats

PGDLLIMPORT bool log_statement_stats
extern

Definition at line 495 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 517 of file guc_tables.c.

Referenced by ReportTemporaryFileUsage().

◆ log_xact_sample_rate

PGDLLIMPORT double log_xact_sample_rate
extern

Definition at line 519 of file guc_tables.c.

Referenced by StartTransaction().

◆ num_temp_buffers

PGDLLIMPORT int num_temp_buffers
extern

Definition at line 525 of file guc_tables.c.

Referenced by InitLocalBuffers().

◆ session_auth_is_superuser

PGDLLIMPORT bool session_auth_is_superuser
extern

Definition at line 508 of file guc_tables.c.

Referenced by InitializeParallelDSM().

◆ tcp_keepalives_count

PGDLLIMPORT int tcp_keepalives_count
extern

Definition at line 539 of file guc_tables.c.

Referenced by StreamConnection().

◆ tcp_keepalives_idle

PGDLLIMPORT int tcp_keepalives_idle
extern

Definition at line 537 of file guc_tables.c.

Referenced by StreamConnection().

◆ tcp_keepalives_interval

PGDLLIMPORT int tcp_keepalives_interval
extern

Definition at line 538 of file guc_tables.c.

Referenced by StreamConnection().

◆ tcp_user_timeout

PGDLLIMPORT int tcp_user_timeout
extern

Definition at line 540 of file guc_tables.c.

Referenced by StreamConnection().

◆ temp_file_limit

PGDLLIMPORT int temp_file_limit
extern

Definition at line 523 of file guc_tables.c.

Referenced by FileWrite().