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

Enumerations

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

Functions

bool ParseConfigFile (const char *config_file, bool strict, const char *calling_file, int calling_lineno, int depth, int elevel, ConfigVariable **head_p, ConfigVariable **tail_p)
 
bool ParseConfigFp (FILE *fp, const char *config_file, int depth, int elevel, ConfigVariable **head_p, ConfigVariable **tail_p)
 
bool ParseConfigDirectory (const char *includedir, const char *calling_file, int calling_lineno, int depth, int elevel, ConfigVariable **head_p, ConfigVariable **tail_p)
 
void FreeConfigVariables (ConfigVariable *list)
 
char * DeescapeQuotedString (const char *s)
 
void SetConfigOption (const char *name, const char *value, GucContext context, GucSource source)
 
void DefineCustomBoolVariable (const char *name, const char *short_desc, const char *long_desc, bool *valueAddr, bool bootValue, GucContext context, int flags, GucBoolCheckHook check_hook, GucBoolAssignHook assign_hook, GucShowHook show_hook) pg_attribute_nonnull(1
 
void void DefineCustomIntVariable (const char *name, const char *short_desc, const char *long_desc, int *valueAddr, int bootValue, int minValue, int maxValue, GucContext context, int flags, GucIntCheckHook check_hook, GucIntAssignHook assign_hook, GucShowHook show_hook) pg_attribute_nonnull(1
 
void void void DefineCustomRealVariable (const char *name, const char *short_desc, const char *long_desc, double *valueAddr, double bootValue, double minValue, double maxValue, GucContext context, int flags, GucRealCheckHook check_hook, GucRealAssignHook assign_hook, GucShowHook show_hook) pg_attribute_nonnull(1
 
void void void void DefineCustomStringVariable (const char *name, const char *short_desc, const char *long_desc, char **valueAddr, const char *bootValue, GucContext context, int flags, GucStringCheckHook check_hook, GucStringAssignHook assign_hook, GucShowHook show_hook) pg_attribute_nonnull(1
 
void void void void void DefineCustomEnumVariable (const char *name, const char *short_desc, const char *long_desc, int *valueAddr, int bootValue, const struct config_enum_entry *options, GucContext context, int flags, GucEnumCheckHook check_hook, GucEnumAssignHook assign_hook, GucShowHook show_hook) pg_attribute_nonnull(1
 
void void void void void void MarkGUCPrefixReserved (const char *className)
 
const char * GetConfigOption (const char *name, bool missing_ok, bool restrict_privileged)
 
const char * GetConfigOptionResetString (const char *name)
 
int GetConfigOptionFlags (const char *name, bool missing_ok)
 
void ProcessConfigFile (GucContext context)
 
char * convert_GUC_name_for_parameter_acl (const char *name)
 
void check_GUC_name_for_parameter_acl (const char *name)
 
void InitializeGUCOptions (void)
 
bool SelectConfigFiles (const char *userDoption, const char *progname)
 
void ResetAllOptions (void)
 
void AtStart_GUC (void)
 
int NewGUCNestLevel (void)
 
void AtEOXact_GUC (bool isCommit, int nestLevel)
 
void BeginReportingGUCOptions (void)
 
void ReportChangedGUCOptions (void)
 
void ParseLongOption (const char *string, char **name, char **value)
 
const char * get_config_unit_name (int flags)
 
bool parse_int (const char *value, int *result, int flags, const char **hintmsg)
 
bool parse_real (const char *value, double *result, int flags, const char **hintmsg)
 
int set_config_option (const char *name, const char *value, GucContext context, GucSource source, GucAction action, bool changeVal, int elevel, bool is_reload)
 
int set_config_option_ext (const char *name, const char *value, GucContext context, GucSource source, Oid srole, GucAction action, bool changeVal, int elevel, bool is_reload)
 
int set_config_with_handle (const char *name, config_handle *handle, const char *value, GucContext context, GucSource source, Oid srole, GucAction action, bool changeVal, int elevel, bool is_reload)
 
config_handleget_config_handle (const char *name)
 
void AlterSystemSetConfigFile (AlterSystemStmt *altersysstmt)
 
char * GetConfigOptionByName (const char *name, const char **varname, bool missing_ok)
 
void TransformGUCArray (ArrayType *array, List **configNames, List **configValues)
 
void ProcessGUCArray (ArrayType *array, GucContext context, GucSource source, GucAction action)
 
ArrayTypeGUCArrayAdd (ArrayType *array, const char *name, const char *value)
 
ArrayTypeGUCArrayDelete (ArrayType *array, const char *name)
 
ArrayTypeGUCArrayReset (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 current_role_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 bool backtrace_on_internal_error
 
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 361 of file guc.h.

◆ GUC_check_errdetail

#define GUC_check_errdetail
Value:
GUC_check_errdetail_string = format_elog_string
void pre_format_elog_string(int errnumber, const char *domain)
Definition: elog.c:1633
char * format_elog_string(const char *fmt,...)
Definition: elog.c:1642
#define TEXTDOMAIN
Definition: elog.h:152

Definition at line 446 of file guc.h.

◆ GUC_check_errhint

#define GUC_check_errhint
Value:
GUC_check_errhint_string = format_elog_string

Definition at line 450 of file guc.h.

◆ GUC_check_errmsg

#define GUC_check_errmsg
Value:
GUC_check_errmsg_string = format_elog_string

Definition at line 442 of file guc.h.

◆ GUC_CUSTOM_PLACEHOLDER

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

Definition at line 219 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 223 of file guc.h.

◆ GUC_DISALLOW_IN_FILE

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

Definition at line 218 of file guc.h.

◆ GUC_EXPLAIN

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

Definition at line 215 of file guc.h.

◆ GUC_IS_NAME

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

Definition at line 221 of file guc.h.

◆ GUC_LIST_INPUT

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

Definition at line 210 of file guc.h.

◆ GUC_LIST_QUOTE

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

Definition at line 211 of file guc.h.

◆ GUC_NO_RESET

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

Definition at line 213 of file guc.h.

◆ GUC_NO_RESET_ALL

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

Definition at line 214 of file guc.h.

◆ GUC_NO_SHOW_ALL

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

Definition at line 212 of file guc.h.

◆ GUC_NOT_IN_SAMPLE

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

Definition at line 217 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 222 of file guc.h.

◆ GUC_QUALIFIER_SEPARATOR

#define GUC_QUALIFIER_SEPARATOR   '.'

Definition at line 204 of file guc.h.

◆ GUC_REPORT

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

Definition at line 216 of file guc.h.

◆ GUC_RUNTIME_COMPUTED

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

Definition at line 225 of file guc.h.

◆ GUC_SUPERUSER_ONLY

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

Definition at line 220 of file guc.h.

◆ GUC_UNIT

#define GUC_UNIT   (GUC_UNIT_MEMORY | GUC_UNIT_TIME)

Definition at line 239 of file guc.h.

◆ GUC_UNIT_BLOCKS

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

Definition at line 228 of file guc.h.

◆ GUC_UNIT_BYTE

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

Definition at line 231 of file guc.h.

◆ GUC_UNIT_KB

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

Definition at line 227 of file guc.h.

◆ GUC_UNIT_MB

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

Definition at line 230 of file guc.h.

◆ GUC_UNIT_MEMORY

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

Definition at line 232 of file guc.h.

◆ GUC_UNIT_MIN

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

Definition at line 236 of file guc.h.

◆ GUC_UNIT_MS

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

Definition at line 234 of file guc.h.

◆ GUC_UNIT_S

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

Definition at line 235 of file guc.h.

◆ GUC_UNIT_TIME

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

Definition at line 237 of file guc.h.

◆ GUC_UNIT_XBLOCKS

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

Definition at line 229 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

◆ config_handle

typedef struct config_generic config_handle

Definition at line 1 of file guc.h.

◆ ConfigVariable

◆ GucBoolAssignHook

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

Definition at line 185 of file guc.h.

◆ GucBoolCheckHook

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

Definition at line 179 of file guc.h.

◆ GucEnumAssignHook

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

Definition at line 189 of file guc.h.

◆ GucEnumCheckHook

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

Definition at line 183 of file guc.h.

◆ GucIntAssignHook

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

Definition at line 186 of file guc.h.

◆ GucIntCheckHook

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

Definition at line 180 of file guc.h.

◆ GucRealAssignHook

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

Definition at line 187 of file guc.h.

◆ GucRealCheckHook

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

Definition at line 181 of file guc.h.

◆ GucShowHook

typedef const char*(* GucShowHook) (void)

Definition at line 191 of file guc.h.

◆ GucStringAssignHook

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

Definition at line 188 of file guc.h.

◆ GucStringCheckHook

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

Definition at line 182 of file guc.h.

Enumeration Type Documentation

◆ GucAction

enum GucAction
Enumerator
GUC_ACTION_SET 
GUC_ACTION_LOCAL 
GUC_ACTION_SAVE 

Definition at line 196 of file guc.h.

197 {
198  /* Types of set_config_option actions */
199  GUC_ACTION_SET, /* regular SET command */
200  GUC_ACTION_LOCAL, /* SET LOCAL command */
201  GUC_ACTION_SAVE, /* function SET option, or temp assignment */
202 } GucAction;
GucAction
Definition: guc.h:197
@ GUC_ACTION_SAVE
Definition: guc.h:201
@ GUC_ACTION_SET
Definition: guc.h:199
@ GUC_ACTION_LOCAL
Definition: guc.h:200

◆ 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 {
71  PGC_SIGHUP,
74  PGC_SUSET,
76 } GucContext;
GucContext
Definition: guc.h:68
@ PGC_SUSET
Definition: guc.h:74
@ PGC_INTERNAL
Definition: guc.h:69
@ PGC_USERSET
Definition: guc.h:75
@ PGC_SU_BACKEND
Definition: guc.h:72
@ PGC_POSTMASTER
Definition: guc.h:70
@ PGC_SIGHUP
Definition: guc.h:71
@ 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
Definition: guc.h:108
@ PGC_S_DEFAULT
Definition: guc.h:109
@ PGC_S_DYNAMIC_DEFAULT
Definition: guc.h:110
@ PGC_S_FILE
Definition: guc.h:112
@ PGC_S_GLOBAL
Definition: guc.h:114
@ PGC_S_DATABASE
Definition: guc.h:115
@ PGC_S_OVERRIDE
Definition: guc.h:119
@ PGC_S_ARGV
Definition: guc.h:113
@ PGC_S_SESSION
Definition: guc.h:122
@ PGC_S_CLIENT
Definition: guc.h:118
@ PGC_S_DATABASE_USER
Definition: guc.h:117
@ PGC_S_ENV_VAR
Definition: guc.h:111
@ PGC_S_USER
Definition: guc.h:116
@ PGC_S_TEST
Definition: guc.h:121
@ PGC_S_INTERACTIVE
Definition: guc.h:120

Function Documentation

◆ AlterSystemSetConfigFile()

void AlterSystemSetConfigFile ( AlterSystemStmt altersysstmt)

Definition at line 4531 of file guc.c.

4532 {
4533  char *name;
4534  char *value;
4535  bool resetall = false;
4536  ConfigVariable *head = NULL;
4537  ConfigVariable *tail = NULL;
4538  volatile int Tmpfd;
4539  char AutoConfFileName[MAXPGPATH];
4540  char AutoConfTmpFileName[MAXPGPATH];
4541 
4542  /*
4543  * Extract statement arguments
4544  */
4545  name = altersysstmt->setstmt->name;
4546 
4547  switch (altersysstmt->setstmt->kind)
4548  {
4549  case VAR_SET_VALUE:
4550  value = ExtractSetVariableArgs(altersysstmt->setstmt);
4551  break;
4552 
4553  case VAR_SET_DEFAULT:
4554  case VAR_RESET:
4555  value = NULL;
4556  break;
4557 
4558  case VAR_RESET_ALL:
4559  value = NULL;
4560  resetall = true;
4561  break;
4562 
4563  default:
4564  elog(ERROR, "unrecognized alter system stmt type: %d",
4565  altersysstmt->setstmt->kind);
4566  break;
4567  }
4568 
4569  /*
4570  * Check permission to run ALTER SYSTEM on the target variable
4571  */
4572  if (!superuser())
4573  {
4574  if (resetall)
4575  ereport(ERROR,
4576  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4577  errmsg("permission denied to perform ALTER SYSTEM RESET ALL")));
4578  else
4579  {
4580  AclResult aclresult;
4581 
4582  aclresult = pg_parameter_aclcheck(name, GetUserId(),
4584  if (aclresult != ACLCHECK_OK)
4585  ereport(ERROR,
4586  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4587  errmsg("permission denied to set parameter \"%s\"",
4588  name)));
4589  }
4590  }
4591 
4592  /*
4593  * Unless it's RESET_ALL, validate the target variable and value
4594  */
4595  if (!resetall)
4596  {
4597  struct config_generic *record;
4598 
4599  /* We don't want to create a placeholder if there's not one already */
4600  record = find_option(name, false, true, DEBUG5);
4601  if (record != NULL)
4602  {
4603  /*
4604  * Don't allow parameters that can't be set in configuration files
4605  * to be set in PG_AUTOCONF_FILENAME file.
4606  */
4607  if ((record->context == PGC_INTERNAL) ||
4608  (record->flags & GUC_DISALLOW_IN_FILE) ||
4609  (record->flags & GUC_DISALLOW_IN_AUTO_FILE))
4610  ereport(ERROR,
4611  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
4612  errmsg("parameter \"%s\" cannot be changed",
4613  name)));
4614 
4615  /*
4616  * If a value is specified, verify that it's sane.
4617  */
4618  if (value)
4619  {
4620  union config_var_val newval;
4621  void *newextra = NULL;
4622 
4623  if (!parse_and_validate_value(record, name, value,
4624  PGC_S_FILE, ERROR,
4625  &newval, &newextra))
4626  ereport(ERROR,
4627  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4628  errmsg("invalid value for parameter \"%s\": \"%s\"",
4629  name, value)));
4630 
4631  if (record->vartype == PGC_STRING && newval.stringval != NULL)
4632  guc_free(newval.stringval);
4633  guc_free(newextra);
4634  }
4635  }
4636  else
4637  {
4638  /*
4639  * Variable not known; check we'd be allowed to create it. (We
4640  * cannot validate the value, but that's fine. A non-core GUC in
4641  * the config file cannot cause postmaster start to fail, so we
4642  * don't have to be too tense about possibly installing a bad
4643  * value.)
4644  */
4645  (void) assignable_custom_variable_name(name, false, ERROR);
4646  }
4647 
4648  /*
4649  * We must also reject values containing newlines, because the grammar
4650  * for config files doesn't support embedded newlines in string
4651  * literals.
4652  */
4653  if (value && strchr(value, '\n'))
4654  ereport(ERROR,
4655  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4656  errmsg("parameter value for ALTER SYSTEM must not contain a newline")));
4657  }
4658 
4659  /*
4660  * PG_AUTOCONF_FILENAME and its corresponding temporary file are always in
4661  * the data directory, so we can reference them by simple relative paths.
4662  */
4663  snprintf(AutoConfFileName, sizeof(AutoConfFileName), "%s",
4665  snprintf(AutoConfTmpFileName, sizeof(AutoConfTmpFileName), "%s.%s",
4666  AutoConfFileName,
4667  "tmp");
4668 
4669  /*
4670  * Only one backend is allowed to operate on PG_AUTOCONF_FILENAME at a
4671  * time. Use AutoFileLock to ensure that. We must hold the lock while
4672  * reading the old file contents.
4673  */
4674  LWLockAcquire(AutoFileLock, LW_EXCLUSIVE);
4675 
4676  /*
4677  * If we're going to reset everything, then no need to open or parse the
4678  * old file. We'll just write out an empty list.
4679  */
4680  if (!resetall)
4681  {
4682  struct stat st;
4683 
4684  if (stat(AutoConfFileName, &st) == 0)
4685  {
4686  /* open old file PG_AUTOCONF_FILENAME */
4687  FILE *infile;
4688 
4689  infile = AllocateFile(AutoConfFileName, "r");
4690  if (infile == NULL)
4691  ereport(ERROR,
4693  errmsg("could not open file \"%s\": %m",
4694  AutoConfFileName)));
4695 
4696  /* parse it */
4697  if (!ParseConfigFp(infile, AutoConfFileName, CONF_FILE_START_DEPTH,
4698  LOG, &head, &tail))
4699  ereport(ERROR,
4700  (errcode(ERRCODE_CONFIG_FILE_ERROR),
4701  errmsg("could not parse contents of file \"%s\"",
4702  AutoConfFileName)));
4703 
4704  FreeFile(infile);
4705  }
4706 
4707  /*
4708  * Now, replace any existing entry with the new value, or add it if
4709  * not present.
4710  */
4711  replace_auto_config_value(&head, &tail, name, value);
4712  }
4713 
4714  /*
4715  * Invoke the post-alter hook for setting this GUC variable. GUCs
4716  * typically do not have corresponding entries in pg_parameter_acl, so we
4717  * call the hook using the name rather than a potentially-non-existent
4718  * OID. Nonetheless, we pass ParameterAclRelationId so that this call
4719  * context can be distinguished from others. (Note that "name" will be
4720  * NULL in the RESET ALL case.)
4721  *
4722  * We do this here rather than at the end, because ALTER SYSTEM is not
4723  * transactional. If the hook aborts our transaction, it will be cleaner
4724  * to do so before we touch any files.
4725  */
4726  InvokeObjectPostAlterHookArgStr(ParameterAclRelationId, name,
4728  altersysstmt->setstmt->kind,
4729  false);
4730 
4731  /*
4732  * To ensure crash safety, first write the new file data to a temp file,
4733  * then atomically rename it into place.
4734  *
4735  * If there is a temp file left over due to a previous crash, it's okay to
4736  * truncate and reuse it.
4737  */
4738  Tmpfd = BasicOpenFile(AutoConfTmpFileName,
4739  O_CREAT | O_RDWR | O_TRUNC);
4740  if (Tmpfd < 0)
4741  ereport(ERROR,
4743  errmsg("could not open file \"%s\": %m",
4744  AutoConfTmpFileName)));
4745 
4746  /*
4747  * Use a TRY block to clean up the file if we fail. Since we need a TRY
4748  * block anyway, OK to use BasicOpenFile rather than OpenTransientFile.
4749  */
4750  PG_TRY();
4751  {
4752  /* Write and sync the new contents to the temporary file */
4753  write_auto_conf_file(Tmpfd, AutoConfTmpFileName, head);
4754 
4755  /* Close before renaming; may be required on some platforms */
4756  close(Tmpfd);
4757  Tmpfd = -1;
4758 
4759  /*
4760  * As the rename is atomic operation, if any problem occurs after this
4761  * at worst it can lose the parameters set by last ALTER SYSTEM
4762  * command.
4763  */
4764  durable_rename(AutoConfTmpFileName, AutoConfFileName, ERROR);
4765  }
4766  PG_CATCH();
4767  {
4768  /* Close file first, else unlink might fail on some platforms */
4769  if (Tmpfd >= 0)
4770  close(Tmpfd);
4771 
4772  /* Unlink, but ignore any error */
4773  (void) unlink(AutoConfTmpFileName);
4774 
4775  PG_RE_THROW();
4776  }
4777  PG_END_TRY();
4778 
4779  FreeConfigVariables(head);
4780 
4781  LWLockRelease(AutoFileLock);
4782 }
AclResult
Definition: acl.h:181
@ ACLCHECK_OK
Definition: acl.h:182
AclResult pg_parameter_aclcheck(const char *name, Oid roleid, AclMode mode)
Definition: aclchk.c:4106
#define CONF_FILE_START_DEPTH
Definition: conffiles.h:17
int errcode_for_file_access(void)
Definition: elog.c:883
int errcode(int sqlerrcode)
Definition: elog.c:860
int errmsg(const char *fmt,...)
Definition: elog.c:1075
#define LOG
Definition: elog.h:31
#define PG_RE_THROW()
Definition: elog.h:411
#define PG_TRY(...)
Definition: elog.h:370
#define PG_END_TRY(...)
Definition: elog.h:395
#define ERROR
Definition: elog.h:39
#define PG_CATCH(...)
Definition: elog.h:380
#define ereport(elevel,...)
Definition: elog.h:149
#define DEBUG5
Definition: elog.h:26
FILE * AllocateFile(const char *name, const char *mode)
Definition: fd.c:2583
int durable_rename(const char *oldfile, const char *newfile, int elevel)
Definition: fd.c:782
int BasicOpenFile(const char *fileName, int fileFlags)
Definition: fd.c:1087
int FreeFile(FILE *file)
Definition: fd.c:2781
static bool assignable_custom_variable_name(const char *name, bool skip_errors, int elevel)
Definition: guc.c:1116
struct config_generic * find_option(const char *name, bool create_placeholders, bool skip_errors, int elevel)
Definition: guc.c:1230
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:3113
void guc_free(void *ptr)
Definition: guc.c:684
static void write_auto_conf_file(int fd, const char *filename, ConfigVariable *head)
Definition: guc.c:4393
#define newval
static void replace_auto_config_value(ConfigVariable **head_p, ConfigVariable **tail_p, const char *name, const char *value)
Definition: guc.c:4461
#define PG_AUTOCONF_FILENAME
Definition: guc.h:33
void FreeConfigVariables(ConfigVariable *list)
bool ParseConfigFp(FILE *fp, const char *config_file, int depth, int elevel, ConfigVariable **head_p, ConfigVariable **tail_p)
#define GUC_DISALLOW_IN_FILE
Definition: guc.h:218
#define GUC_DISALLOW_IN_AUTO_FILE
Definition: guc.h:223
char * ExtractSetVariableArgs(VariableSetStmt *stmt)
Definition: guc_funcs.c:167
@ PGC_STRING
Definition: guc_tables.h:28
static struct @148 value
#define close(a)
Definition: win32.h:12
bool LWLockAcquire(LWLock *lock, LWLockMode mode)
Definition: lwlock.c:1168
void LWLockRelease(LWLock *lock)
Definition: lwlock.c:1781
@ LW_EXCLUSIVE
Definition: lwlock.h:116
Oid GetUserId(void)
Definition: miscinit.c:515
#define InvokeObjectPostAlterHookArgStr(classId, objectName, subId, auxiliaryId, is_internal)
Definition: objectaccess.h:247
@ VAR_SET_DEFAULT
Definition: parsenodes.h:2449
@ VAR_RESET
Definition: parsenodes.h:2452
@ VAR_SET_VALUE
Definition: parsenodes.h:2448
@ VAR_RESET_ALL
Definition: parsenodes.h:2453
#define ACL_ALTER_SYSTEM
Definition: parsenodes.h:89
#define MAXPGPATH
#define snprintf
Definition: port.h:238
VariableSetStmt * setstmt
Definition: parsenodes.h:3656
VariableSetKind kind
Definition: parsenodes.h:2459
GucContext context
Definition: guc_tables.h:157
enum config_type vartype
Definition: guc_tables.h:163
bool superuser(void)
Definition: superuser.c:46
const char * name
#define stat
Definition: win32_port.h:284
static void infile(const char *name)
Definition: zic.c:1243

References ACL_ALTER_SYSTEM, ACLCHECK_OK, AllocateFile(), assignable_custom_variable_name(), BasicOpenFile(), close, CONF_FILE_START_DEPTH, config_generic::context, DEBUG5, durable_rename(), elog(), ereport, errcode(), errcode_for_file_access(), errmsg(), ERROR, ExtractSetVariableArgs(), find_option(), config_generic::flags, FreeConfigVariables(), FreeFile(), GetUserId(), GUC_DISALLOW_IN_AUTO_FILE, GUC_DISALLOW_IN_FILE, guc_free(), infile(), InvokeObjectPostAlterHookArgStr, VariableSetStmt::kind, LOG, LW_EXCLUSIVE, LWLockAcquire(), LWLockRelease(), MAXPGPATH, name, VariableSetStmt::name, newval, parse_and_validate_value(), ParseConfigFp(), PG_AUTOCONF_FILENAME, PG_CATCH, PG_END_TRY, pg_parameter_aclcheck(), PG_RE_THROW, PG_TRY, PGC_INTERNAL, PGC_S_FILE, PGC_STRING, replace_auto_config_value(), AlterSystemStmt::setstmt, snprintf, stat, superuser(), 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 2245 of file guc.c.

2246 {
2247  slist_mutable_iter iter;
2248 
2249  /*
2250  * Note: it's possible to get here with GUCNestLevel == nestLevel-1 during
2251  * abort, if there is a failure during transaction start before
2252  * AtStart_GUC is called.
2253  */
2254  Assert(nestLevel > 0 &&
2255  (nestLevel <= GUCNestLevel ||
2256  (nestLevel == GUCNestLevel + 1 && !isCommit)));
2257 
2258  /* We need only process GUCs having nonempty stacks */
2260  {
2261  struct config_generic *gconf = slist_container(struct config_generic,
2262  stack_link, iter.cur);
2263  GucStack *stack;
2264 
2265  /*
2266  * Process and pop each stack entry within the nest level. To simplify
2267  * fmgr_security_definer() and other places that use GUC_ACTION_SAVE,
2268  * we allow failure exit from code that uses a local nest level to be
2269  * recovered at the surrounding transaction or subtransaction abort;
2270  * so there could be more than one stack entry to pop.
2271  */
2272  while ((stack = gconf->stack) != NULL &&
2273  stack->nest_level >= nestLevel)
2274  {
2275  GucStack *prev = stack->prev;
2276  bool restorePrior = false;
2277  bool restoreMasked = false;
2278  bool changed;
2279 
2280  /*
2281  * In this next bit, if we don't set either restorePrior or
2282  * restoreMasked, we must "discard" any unwanted fields of the
2283  * stack entries to avoid leaking memory. If we do set one of
2284  * those flags, unused fields will be cleaned up after restoring.
2285  */
2286  if (!isCommit) /* if abort, always restore prior value */
2287  restorePrior = true;
2288  else if (stack->state == GUC_SAVE)
2289  restorePrior = true;
2290  else if (stack->nest_level == 1)
2291  {
2292  /* transaction commit */
2293  if (stack->state == GUC_SET_LOCAL)
2294  restoreMasked = true;
2295  else if (stack->state == GUC_SET)
2296  {
2297  /* we keep the current active value */
2298  discard_stack_value(gconf, &stack->prior);
2299  }
2300  else /* must be GUC_LOCAL */
2301  restorePrior = true;
2302  }
2303  else if (prev == NULL ||
2304  prev->nest_level < stack->nest_level - 1)
2305  {
2306  /* decrement entry's level and do not pop it */
2307  stack->nest_level--;
2308  continue;
2309  }
2310  else
2311  {
2312  /*
2313  * We have to merge this stack entry into prev. See README for
2314  * discussion of this bit.
2315  */
2316  switch (stack->state)
2317  {
2318  case GUC_SAVE:
2319  Assert(false); /* can't get here */
2320  break;
2321 
2322  case GUC_SET:
2323  /* next level always becomes SET */
2324  discard_stack_value(gconf, &stack->prior);
2325  if (prev->state == GUC_SET_LOCAL)
2326  discard_stack_value(gconf, &prev->masked);
2327  prev->state = GUC_SET;
2328  break;
2329 
2330  case GUC_LOCAL:
2331  if (prev->state == GUC_SET)
2332  {
2333  /* LOCAL migrates down */
2334  prev->masked_scontext = stack->scontext;
2335  prev->masked_srole = stack->srole;
2336  prev->masked = stack->prior;
2337  prev->state = GUC_SET_LOCAL;
2338  }
2339  else
2340  {
2341  /* else just forget this stack level */
2342  discard_stack_value(gconf, &stack->prior);
2343  }
2344  break;
2345 
2346  case GUC_SET_LOCAL:
2347  /* prior state at this level no longer wanted */
2348  discard_stack_value(gconf, &stack->prior);
2349  /* copy down the masked state */
2351  prev->masked_srole = stack->masked_srole;
2352  if (prev->state == GUC_SET_LOCAL)
2353  discard_stack_value(gconf, &prev->masked);
2354  prev->masked = stack->masked;
2355  prev->state = GUC_SET_LOCAL;
2356  break;
2357  }
2358  }
2359 
2360  changed = false;
2361 
2362  if (restorePrior || restoreMasked)
2363  {
2364  /* Perform appropriate restoration of the stacked value */
2365  config_var_value newvalue;
2366  GucSource newsource;
2367  GucContext newscontext;
2368  Oid newsrole;
2369 
2370  if (restoreMasked)
2371  {
2372  newvalue = stack->masked;
2373  newsource = PGC_S_SESSION;
2374  newscontext = stack->masked_scontext;
2375  newsrole = stack->masked_srole;
2376  }
2377  else
2378  {
2379  newvalue = stack->prior;
2380  newsource = stack->source;
2381  newscontext = stack->scontext;
2382  newsrole = stack->srole;
2383  }
2384 
2385  switch (gconf->vartype)
2386  {
2387  case PGC_BOOL:
2388  {
2389  struct config_bool *conf = (struct config_bool *) gconf;
2390  bool newval = newvalue.val.boolval;
2391  void *newextra = newvalue.extra;
2392 
2393  if (*conf->variable != newval ||
2394  conf->gen.extra != newextra)
2395  {
2396  if (conf->assign_hook)
2397  conf->assign_hook(newval, newextra);
2398  *conf->variable = newval;
2399  set_extra_field(&conf->gen, &conf->gen.extra,
2400  newextra);
2401  changed = true;
2402  }
2403  break;
2404  }
2405  case PGC_INT:
2406  {
2407  struct config_int *conf = (struct config_int *) gconf;
2408  int newval = newvalue.val.intval;
2409  void *newextra = newvalue.extra;
2410 
2411  if (*conf->variable != newval ||
2412  conf->gen.extra != newextra)
2413  {
2414  if (conf->assign_hook)
2415  conf->assign_hook(newval, newextra);
2416  *conf->variable = newval;
2417  set_extra_field(&conf->gen, &conf->gen.extra,
2418  newextra);
2419  changed = true;
2420  }
2421  break;
2422  }
2423  case PGC_REAL:
2424  {
2425  struct config_real *conf = (struct config_real *) gconf;
2426  double newval = newvalue.val.realval;
2427  void *newextra = newvalue.extra;
2428 
2429  if (*conf->variable != newval ||
2430  conf->gen.extra != newextra)
2431  {
2432  if (conf->assign_hook)
2433  conf->assign_hook(newval, newextra);
2434  *conf->variable = newval;
2435  set_extra_field(&conf->gen, &conf->gen.extra,
2436  newextra);
2437  changed = true;
2438  }
2439  break;
2440  }
2441  case PGC_STRING:
2442  {
2443  struct config_string *conf = (struct config_string *) gconf;
2444  char *newval = newvalue.val.stringval;
2445  void *newextra = newvalue.extra;
2446 
2447  if (*conf->variable != newval ||
2448  conf->gen.extra != newextra)
2449  {
2450  if (conf->assign_hook)
2451  conf->assign_hook(newval, newextra);
2452  set_string_field(conf, conf->variable, newval);
2453  set_extra_field(&conf->gen, &conf->gen.extra,
2454  newextra);
2455  changed = true;
2456  }
2457 
2458  /*
2459  * Release stacked values if not used anymore. We
2460  * could use discard_stack_value() here, but since
2461  * we have type-specific code anyway, might as
2462  * well inline it.
2463  */
2464  set_string_field(conf, &stack->prior.val.stringval, NULL);
2465  set_string_field(conf, &stack->masked.val.stringval, NULL);
2466  break;
2467  }
2468  case PGC_ENUM:
2469  {
2470  struct config_enum *conf = (struct config_enum *) gconf;
2471  int newval = newvalue.val.enumval;
2472  void *newextra = newvalue.extra;
2473 
2474  if (*conf->variable != newval ||
2475  conf->gen.extra != newextra)
2476  {
2477  if (conf->assign_hook)
2478  conf->assign_hook(newval, newextra);
2479  *conf->variable = newval;
2480  set_extra_field(&conf->gen, &conf->gen.extra,
2481  newextra);
2482  changed = true;
2483  }
2484  break;
2485  }
2486  }
2487 
2488  /*
2489  * Release stacked extra values if not used anymore.
2490  */
2491  set_extra_field(gconf, &(stack->prior.extra), NULL);
2492  set_extra_field(gconf, &(stack->masked.extra), NULL);
2493 
2494  /* And restore source information */
2495  set_guc_source(gconf, newsource);
2496  gconf->scontext = newscontext;
2497  gconf->srole = newsrole;
2498  }
2499 
2500  /*
2501  * Pop the GUC's state stack; if it's now empty, remove the GUC
2502  * from guc_stack_list.
2503  */
2504  gconf->stack = prev;
2505  if (prev == NULL)
2506  slist_delete_current(&iter);
2507  pfree(stack);
2508 
2509  /* Report new value if we changed it */
2510  if (changed && (gconf->flags & GUC_REPORT) &&
2511  !(gconf->status & GUC_NEEDS_REPORT))
2512  {
2513  gconf->status |= GUC_NEEDS_REPORT;
2515  }
2516  } /* end of stack-popping loop */
2517  }
2518 
2519  /* Update nesting level */
2520  GUCNestLevel = nestLevel - 1;
2521 }
static slist_head guc_report_list
Definition: guc.c:221
static void set_string_field(struct config_string *conf, char **field, char *newval)
Definition: guc.c:726
static int GUCNestLevel
Definition: guc.c:226
static void discard_stack_value(struct config_generic *gconf, config_var_value *val)
Definition: guc.c:841
static slist_head guc_stack_list
Definition: guc.c:219
static void set_guc_source(struct config_generic *gconf, GucSource newsource)
Definition: guc.c:2107
static void set_extra_field(struct config_generic *gconf, void **field, void *newval)
Definition: guc.c:787
#define GUC_REPORT
Definition: guc.h:216
@ GUC_SET_LOCAL
Definition: guc_tables.h:114
@ GUC_SET
Definition: guc_tables.h:112
@ GUC_SAVE
Definition: guc_tables.h:111
@ GUC_LOCAL
Definition: guc_tables.h:113
#define GUC_NEEDS_REPORT
Definition: guc_tables.h:193
@ PGC_BOOL
Definition: guc_tables.h:25
@ PGC_ENUM
Definition: guc_tables.h:29
@ PGC_REAL
Definition: guc_tables.h:27
@ PGC_INT
Definition: guc_tables.h:26
static void slist_delete_current(slist_mutable_iter *iter)
Definition: ilist.h:1084
#define slist_foreach_modify(iter, lhead)
Definition: ilist.h:1148
static void slist_push_head(slist_head *head, slist_node *node)
Definition: ilist.h:1006
#define slist_container(type, membername, ptr)
Definition: ilist.h:1106
Assert(fmt[strlen(fmt) - 1] !='\n')
void pfree(void *pointer)
Definition: mcxt.c:1431
unsigned int Oid
Definition: postgres_ext.h:31
struct config_generic gen
Definition: guc_tables.h:200
bool * variable
Definition: guc_tables.h:202
GucBoolAssignHook assign_hook
Definition: guc_tables.h:205
int * variable
Definition: guc_tables.h:272
GucEnumAssignHook assign_hook
Definition: guc_tables.h:276
struct config_generic gen
Definition: guc_tables.h:270
GucContext scontext
Definition: guc_tables.h:167
slist_node stack_link
Definition: guc_tables.h:175
GucStack * stack
Definition: guc_tables.h:171
slist_node report_link
Definition: guc_tables.h:177
GucIntAssignHook assign_hook
Definition: guc_tables.h:221
int * variable
Definition: guc_tables.h:216
struct config_generic gen
Definition: guc_tables.h:214
GucRealAssignHook assign_hook
Definition: guc_tables.h:237
double * variable
Definition: guc_tables.h:232
struct config_generic gen
Definition: guc_tables.h:230
struct config_generic gen
Definition: guc_tables.h:256
GucStringAssignHook assign_hook
Definition: guc_tables.h:261
char ** variable
Definition: guc_tables.h:258
union config_var_val val
Definition: guc_tables.h:47
struct guc_stack * prev
Definition: guc_tables.h:119
Oid masked_srole
Definition: guc_tables.h:127
int nest_level
Definition: guc_tables.h:120
config_var_value masked
Definition: guc_tables.h:129
config_var_value prior
Definition: guc_tables.h:128
GucContext scontext
Definition: guc_tables.h:124
GucStackState state
Definition: guc_tables.h:121
GucSource source
Definition: guc_tables.h:122
GucContext masked_scontext
Definition: guc_tables.h:125
slist_node * cur
Definition: ilist.h:274
double realval
Definition: guc_tables.h:36
char * stringval
Definition: guc_tables.h:37

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 2211 of file guc.c.

2212 {
2213  /*
2214  * The nest level should be 0 between transactions; if it isn't, somebody
2215  * didn't call AtEOXact_GUC, or called it with the wrong nestLevel. We
2216  * throw a warning but make no other effort to clean up.
2217  */
2218  if (GUCNestLevel != 0)
2219  elog(WARNING, "GUC nest level = %d at transaction start",
2220  GUCNestLevel);
2221  GUCNestLevel = 1;
2222 }
#define WARNING
Definition: elog.h:36

References elog(), GUCNestLevel, and WARNING.

Referenced by StartTransaction().

◆ BeginReportingGUCOptions()

void BeginReportingGUCOptions ( void  )

Definition at line 2529 of file guc.c.

2530 {
2531  HASH_SEQ_STATUS status;
2532  GUCHashEntry *hentry;
2533 
2534  /*
2535  * Don't do anything unless talking to an interactive frontend.
2536  */
2538  return;
2539 
2540  reporting_enabled = true;
2541 
2542  /*
2543  * Hack for in_hot_standby: set the GUC value true if appropriate. This
2544  * is kind of an ugly place to do it, but there's few better options.
2545  *
2546  * (This could be out of date by the time we actually send it, in which
2547  * case the next ReportChangedGUCOptions call will send a duplicate
2548  * report.)
2549  */
2550  if (RecoveryInProgress())
2551  SetConfigOption("in_hot_standby", "true",
2553 
2554  /* Transmit initial values of interesting variables */
2555  hash_seq_init(&status, guc_hashtab);
2556  while ((hentry = (GUCHashEntry *) hash_seq_search(&status)) != NULL)
2557  {
2558  struct config_generic *conf = hentry->gucvar;
2559 
2560  if (conf->flags & GUC_REPORT)
2561  ReportGUCOption(conf);
2562  }
2563 }
@ DestRemote
Definition: dest.h:89
void * hash_seq_search(HASH_SEQ_STATUS *status)
Definition: dynahash.c:1431
void hash_seq_init(HASH_SEQ_STATUS *status, HTAB *hashp)
Definition: dynahash.c:1421
static void ReportGUCOption(struct config_generic *record)
Definition: guc.c:2617
void SetConfigOption(const char *name, const char *value, GucContext context, GucSource source)
Definition: guc.c:4256
static HTAB * guc_hashtab
Definition: guc.c:207
static bool reporting_enabled
Definition: guc.c:224
CommandDest whereToSendOutput
Definition: postgres.c:89
struct config_generic * gucvar
Definition: guc.c:204
bool RecoveryInProgress(void)
Definition: xlog.c:6211

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

Referenced by PostgresMain().

◆ check_GUC_name_for_parameter_acl()

void check_GUC_name_for_parameter_acl ( const char *  name)

Definition at line 1405 of file guc.c.

1406 {
1407  /* OK if the GUC exists. */
1408  if (find_option(name, false, true, DEBUG5) != NULL)
1409  return;
1410  /* Otherwise, it'd better be a valid custom GUC name. */
1411  (void) assignable_custom_variable_name(name, false, ERROR);
1412 }

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

Referenced by ParameterAclCreate().

◆ convert_GUC_name_for_parameter_acl()

char* convert_GUC_name_for_parameter_acl ( const char *  name)

Definition at line 1369 of file guc.c.

1370 {
1371  char *result;
1372 
1373  /* Apply old-GUC-name mapping. */
1374  for (int i = 0; map_old_guc_names[i] != NULL; i += 2)
1375  {
1377  {
1378  name = map_old_guc_names[i + 1];
1379  break;
1380  }
1381  }
1382 
1383  /* Apply case-folding that matches guc_name_compare(). */
1384  result = pstrdup(name);
1385  for (char *ptr = result; *ptr != '\0'; ptr++)
1386  {
1387  char ch = *ptr;
1388 
1389  if (ch >= 'A' && ch <= 'Z')
1390  {
1391  ch += 'a' - 'A';
1392  *ptr = ch;
1393  }
1394  }
1395 
1396  return result;
1397 }
static const char *const map_old_guc_names[]
Definition: guc.c:186
int guc_name_compare(const char *namea, const char *nameb)
Definition: guc.c:1295
int i
Definition: isn.c:73
char * pstrdup(const char *in)
Definition: mcxt.c:1619

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 5873 of file guc.c.

5874 {
5875  Size size;
5876  dlist_iter iter;
5877 
5878  /* Add space reqd for saving the data size of the guc state */
5879  size = sizeof(Size);
5880 
5881  /*
5882  * Add up the space needed for each GUC variable.
5883  *
5884  * We need only process non-default GUCs.
5885  */
5887  {
5888  struct config_generic *gconf = dlist_container(struct config_generic,
5889  nondef_link, iter.cur);
5890 
5891  size = add_size(size, estimate_variable_size(gconf));
5892  }
5893 
5894  return size;
5895 }
size_t Size
Definition: c.h:594
static dlist_head guc_nondef_list
Definition: guc.c:217
static Size estimate_variable_size(struct config_generic *gconf)
Definition: guc.c:5773
#define dlist_foreach(iter, lhead)
Definition: ilist.h:623
#define dlist_container(type, membername, ptr)
Definition: ilist.h:593
Size add_size(Size s1, Size s2)
Definition: shmem.c:494
dlist_node nondef_link
Definition: guc_tables.h:173
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 {
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,
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,
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 }
void ResetAllOptions(void)
Definition: guc.c:1999
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:3314
void SetPGVariable(const char *name, List *args, bool is_local)
Definition: guc_funcs.c:315
#define stmt
Definition: indent_codes.h:59
#define ACL_SET
Definition: parsenodes.h:88
@ VAR_SET_MULTI
Definition: parsenodes.h:2451
@ VAR_SET_CURRENT
Definition: parsenodes.h:2450
#define lfirst(lc)
Definition: pg_list.h:172
#define linitial_node(type, l)
Definition: pg_list.h:181
#define list_make1(x1)
Definition: pg_list.h:212
void ImportSnapshot(const char *idstr)
Definition: snapmgr.c:1373
union ValUnion val
Definition: parsenodes.h:352
char * defname
Definition: parsenodes.h:802
Node * arg
Definition: parsenodes.h:803
#define strVal(v)
Definition: value.h:82
void WarnNoTransactionBlock(bool isTopLevel, const char *stmtType)
Definition: xact.c:3569
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 }
char * GetConfigOptionByName(const char *name, const char **varname, bool missing_ok)
Definition: guc.c:5351
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)

◆ get_config_handle()

config_handle* get_config_handle ( const char *  name)

Definition at line 4208 of file guc.c.

4209 {
4210  struct config_generic *gen = find_option(name, false, false, 0);
4211 
4212  if (gen && ((gen->flags & GUC_CUSTOM_PLACEHOLDER) == 0))
4213  return gen;
4214 
4215  return NULL;
4216 }
#define GUC_CUSTOM_PLACEHOLDER
Definition: guc.h:219

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

Referenced by fmgr_security_definer().

◆ get_config_unit_name()

const char* get_config_unit_name ( int  flags)

Definition at line 2797 of file guc.c.

2798 {
2799  switch (flags & GUC_UNIT)
2800  {
2801  case 0:
2802  return NULL; /* GUC has no units */
2803  case GUC_UNIT_BYTE:
2804  return "B";
2805  case GUC_UNIT_KB:
2806  return "kB";
2807  case GUC_UNIT_MB:
2808  return "MB";
2809  case GUC_UNIT_BLOCKS:
2810  {
2811  static char bbuf[8];
2812 
2813  /* initialize if first time through */
2814  if (bbuf[0] == '\0')
2815  snprintf(bbuf, sizeof(bbuf), "%dkB", BLCKSZ / 1024);
2816  return bbuf;
2817  }
2818  case GUC_UNIT_XBLOCKS:
2819  {
2820  static char xbuf[8];
2821 
2822  /* initialize if first time through */
2823  if (xbuf[0] == '\0')
2824  snprintf(xbuf, sizeof(xbuf), "%dkB", XLOG_BLCKSZ / 1024);
2825  return xbuf;
2826  }
2827  case GUC_UNIT_MS:
2828  return "ms";
2829  case GUC_UNIT_S:
2830  return "s";
2831  case GUC_UNIT_MIN:
2832  return "min";
2833  default:
2834  elog(ERROR, "unrecognized GUC units value: %d",
2835  flags & GUC_UNIT);
2836  return NULL;
2837  }
2838 }
#define GUC_UNIT_MB
Definition: guc.h:230
#define GUC_UNIT
Definition: guc.h:239
#define GUC_UNIT_MS
Definition: guc.h:234
#define GUC_UNIT_BLOCKS
Definition: guc.h:228
#define GUC_UNIT_XBLOCKS
Definition: guc.h:229
#define GUC_UNIT_BYTE
Definition: guc.h:231
#define GUC_UNIT_S
Definition: guc.h:235
#define GUC_UNIT_KB
Definition: guc.h:227
#define GUC_UNIT_MIN
Definition: guc.h:236

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

Referenced by GetConfigOptionValues(), and parse_and_validate_value().

◆ GetConfigOption()

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

Definition at line 4279 of file guc.c.

4280 {
4281  struct config_generic *record;
4282  static char buffer[256];
4283 
4284  record = find_option(name, false, missing_ok, ERROR);
4285  if (record == NULL)
4286  return NULL;
4287  if (restrict_privileged &&
4288  !ConfigOptionIsVisible(record))
4289  ereport(ERROR,
4290  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4291  errmsg("permission denied to examine \"%s\"", name),
4292  errdetail("Only roles with privileges of the \"%s\" role may examine this parameter.",
4293  "pg_read_all_settings")));
4294 
4295  switch (record->vartype)
4296  {
4297  case PGC_BOOL:
4298  return *((struct config_bool *) record)->variable ? "on" : "off";
4299 
4300  case PGC_INT:
4301  snprintf(buffer, sizeof(buffer), "%d",
4302  *((struct config_int *) record)->variable);
4303  return buffer;
4304 
4305  case PGC_REAL:
4306  snprintf(buffer, sizeof(buffer), "%g",
4307  *((struct config_real *) record)->variable);
4308  return buffer;
4309 
4310  case PGC_STRING:
4311  return *((struct config_string *) record)->variable ?
4312  *((struct config_string *) record)->variable : "";
4313 
4314  case PGC_ENUM:
4315  return config_enum_lookup_by_value((struct config_enum *) record,
4316  *((struct config_enum *) record)->variable);
4317  }
4318  return NULL;
4319 }
int errdetail(const char *fmt,...)
Definition: elog.c:1208
const char * config_enum_lookup_by_value(struct config_enum *record, int val)
Definition: guc.c:3006
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(), CreateSharedMemoryAndSemaphores(), PostmasterMain(), and ProcessConfigFileInternal().

◆ GetConfigOptionByName()

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

Definition at line 5351 of file guc.c.

5352 {
5353  struct config_generic *record;
5354 
5355  record = find_option(name, false, missing_ok, ERROR);
5356  if (record == NULL)
5357  {
5358  if (varname)
5359  *varname = NULL;
5360  return NULL;
5361  }
5362 
5363  if (!ConfigOptionIsVisible(record))
5364  ereport(ERROR,
5365  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
5366  errmsg("permission denied to examine \"%s\"", name),
5367  errdetail("Only roles with privileges of the \"%s\" role may examine this parameter.",
5368  "pg_read_all_settings")));
5369 
5370  if (varname)
5371  *varname = record->name;
5372 
5373  return ShowGUCOption(record, true);
5374 }
char * ShowGUCOption(struct config_generic *record, bool use_units)
Definition: guc.c:5384
const char * name
Definition: guc_tables.h:156

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 4376 of file guc.c.

4377 {
4378  struct config_generic *record;
4379 
4380  record = find_option(name, false, missing_ok, ERROR);
4381  if (record == NULL)
4382  return 0;
4383  return record->flags;
4384 }

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 4329 of file guc.c.

4330 {
4331  struct config_generic *record;
4332  static char buffer[256];
4333 
4334  record = find_option(name, false, false, ERROR);
4335  Assert(record != NULL);
4336  if (!ConfigOptionIsVisible(record))
4337  ereport(ERROR,
4338  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4339  errmsg("permission denied to examine \"%s\"", name),
4340  errdetail("Only roles with privileges of the \"%s\" role may examine this parameter.",
4341  "pg_read_all_settings")));
4342 
4343  switch (record->vartype)
4344  {
4345  case PGC_BOOL:
4346  return ((struct config_bool *) record)->reset_val ? "on" : "off";
4347 
4348  case PGC_INT:
4349  snprintf(buffer, sizeof(buffer), "%d",
4350  ((struct config_int *) record)->reset_val);
4351  return buffer;
4352 
4353  case PGC_REAL:
4354  snprintf(buffer, sizeof(buffer), "%g",
4355  ((struct config_real *) record)->reset_val);
4356  return buffer;
4357 
4358  case PGC_STRING:
4359  return ((struct config_string *) record)->reset_val ?
4360  ((struct config_string *) record)->reset_val : "";
4361 
4362  case PGC_ENUM:
4363  return config_enum_lookup_by_value((struct config_enum *) record,
4364  ((struct config_enum *) record)->reset_val);
4365  }
4366  return NULL;
4367 }
char * reset_val
Definition: guc_tables.h:264

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, config_string::reset_val, 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)
386  else
388 }
static void ShowGUCConfigOption(const char *name, DestReceiver *dest)
Definition: guc_funcs.c:428
static void ShowAllGUCConfig(DestReceiver *dest)
Definition: guc_funcs.c:456

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 }
int16 AttrNumber
Definition: attnum.h:21
TupleDesc CreateTemplateTupleDesc(int natts)
Definition: tupdesc.c:67
void TupleDescInitEntry(TupleDesc desc, AttrNumber attributeNumber, const char *attributeName, Oid oidtypeid, int32 typmod, int attdim)
Definition: tupdesc.c:603

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

Referenced by UtilityTupleDescriptor().

◆ GUC_check_errcode()

void GUC_check_errcode ( int  sqlerrcode)

◆ guc_free()

void guc_free ( void *  ptr)

Definition at line 684 of file guc.c.

685 {
686  /*
687  * Historically, GUC-related code has relied heavily on the ability to do
688  * free(NULL), so we allow that here even though pfree() doesn't.
689  */
690  if (ptr != NULL)
691  {
692  /* This is to help catch old code that malloc's GUC data. */
694  pfree(ptr);
695  }
696 }
static MemoryContext GUCMemoryContext
Definition: guc.c:194
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_sourcefile(), set_config_with_handle(), set_extra_field(), and set_string_field().

◆ guc_malloc()

◆ guc_realloc()

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

Definition at line 647 of file guc.c.

648 {
649  void *data;
650 
651  if (old != NULL)
652  {
653  /* This is to help catch old code that malloc's GUC data. */
655  data = repalloc_extended(old, size,
657  }
658  else
659  {
660  /* Like realloc(3), but not like repalloc(), we allow old == NULL. */
663  }
664  if (unlikely(data == NULL))
665  ereport(elevel,
666  (errcode(ERRCODE_OUT_OF_MEMORY),
667  errmsg("out of memory")));
668  return data;
669 }
void * repalloc_extended(void *pointer, Size size, int flags)
Definition: mcxt.c:1496

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 672 of file guc.c.

673 {
674  char *data;
675  size_t len = strlen(src) + 1;
676 
677  data = guc_malloc(elevel, len);
678  if (likely(data != NULL))
679  memcpy(data, src, len);
680  return data;
681 }
#define likely(x)
Definition: c.h:299
void * guc_malloc(int elevel, size_t size)
Definition: guc.c:633
const void size_t len

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

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

◆ GUCArrayAdd()

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

Definition at line 6413 of file guc.c.

6414 {
6415  struct config_generic *record;
6416  Datum datum;
6417  char *newval;
6418  ArrayType *a;
6419 
6420  Assert(name);
6421  Assert(value);
6422 
6423  /* test if the option is valid and we're allowed to set it */
6424  (void) validate_option_array_item(name, value, false);
6425 
6426  /* normalize name (converts obsolete GUC names to modern spellings) */
6427  record = find_option(name, false, true, WARNING);
6428  if (record)
6429  name = record->name;
6430 
6431  /* build new item for array */
6432  newval = psprintf("%s=%s", name, value);
6433  datum = CStringGetTextDatum(newval);
6434 
6435  if (array)
6436  {
6437  int index;
6438  bool isnull;
6439  int i;
6440 
6441  Assert(ARR_ELEMTYPE(array) == TEXTOID);
6442  Assert(ARR_NDIM(array) == 1);
6443  Assert(ARR_LBOUND(array)[0] == 1);
6444 
6445  index = ARR_DIMS(array)[0] + 1; /* add after end */
6446 
6447  for (i = 1; i <= ARR_DIMS(array)[0]; i++)
6448  {
6449  Datum d;
6450  char *current;
6451 
6452  d = array_ref(array, 1, &i,
6453  -1 /* varlenarray */ ,
6454  -1 /* TEXT's typlen */ ,
6455  false /* TEXT's typbyval */ ,
6456  TYPALIGN_INT /* TEXT's typalign */ ,
6457  &isnull);
6458  if (isnull)
6459  continue;
6460  current = TextDatumGetCString(d);
6461 
6462  /* check for match up through and including '=' */
6463  if (strncmp(current, newval, strlen(name) + 1) == 0)
6464  {
6465  index = i;
6466  break;
6467  }
6468  }
6469 
6470  a = array_set(array, 1, &index,
6471  datum,
6472  false,
6473  -1 /* varlena array */ ,
6474  -1 /* TEXT's typlen */ ,
6475  false /* TEXT's typbyval */ ,
6476  TYPALIGN_INT /* TEXT's typalign */ );
6477  }
6478  else
6479  a = construct_array_builtin(&datum, 1, TEXTOID);
6480 
6481  return a;
6482 }
#define ARR_NDIM(a)
Definition: array.h:290
#define ARR_ELEMTYPE(a)
Definition: array.h:292
#define ARR_DIMS(a)
Definition: array.h:294
#define ARR_LBOUND(a)
Definition: array.h:296
ArrayType * construct_array_builtin(Datum *elems, int nelems, Oid elmtype)
Definition: arrayfuncs.c:3375
ArrayType * array_set(ArrayType *array, int nSubscripts, int *indx, Datum dataValue, bool isNull, int arraytyplen, int elmlen, bool elmbyval, char elmalign)
Definition: arrayfuncs.c:3157
Datum array_ref(ArrayType *array, int nSubscripts, int *indx, int arraytyplen, int elmlen, bool elmbyval, char elmalign, bool *isNull)
Definition: arrayfuncs.c:3140
#define CStringGetTextDatum(s)
Definition: builtins.h:97
#define TextDatumGetCString(d)
Definition: builtins.h:98
static bool validate_option_array_item(const char *name, const char *value, bool skipIfNoPermissions)
Definition: guc.c:6633
int a
Definition: isn.c:69
uintptr_t Datum
Definition: postgres.h:64
char * psprintf(const char *fmt,...)
Definition: psprintf.c:46
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 6491 of file guc.c.

6492 {
6493  struct config_generic *record;
6494  ArrayType *newarray;
6495  int i;
6496  int index;
6497 
6498  Assert(name);
6499 
6500  /* test if the option is valid and we're allowed to set it */
6501  (void) validate_option_array_item(name, NULL, false);
6502 
6503  /* normalize name (converts obsolete GUC names to modern spellings) */
6504  record = find_option(name, false, true, WARNING);
6505  if (record)
6506  name = record->name;
6507 
6508  /* if array is currently null, then surely nothing to delete */
6509  if (!array)
6510  return NULL;
6511 
6512  newarray = NULL;
6513  index = 1;
6514 
6515  for (i = 1; i <= ARR_DIMS(array)[0]; i++)
6516  {
6517  Datum d;
6518  char *val;
6519  bool isnull;
6520 
6521  d = array_ref(array, 1, &i,
6522  -1 /* varlenarray */ ,
6523  -1 /* TEXT's typlen */ ,
6524  false /* TEXT's typbyval */ ,
6525  TYPALIGN_INT /* TEXT's typalign */ ,
6526  &isnull);
6527  if (isnull)
6528  continue;
6529  val = TextDatumGetCString(d);
6530 
6531  /* ignore entry if it's what we want to delete */
6532  if (strncmp(val, name, strlen(name)) == 0
6533  && val[strlen(name)] == '=')
6534  continue;
6535 
6536  /* else add it to the output array */
6537  if (newarray)
6538  newarray = array_set(newarray, 1, &index,
6539  d,
6540  false,
6541  -1 /* varlenarray */ ,
6542  -1 /* TEXT's typlen */ ,
6543  false /* TEXT's typbyval */ ,
6544  TYPALIGN_INT /* TEXT's typalign */ );
6545  else
6546  newarray = construct_array_builtin(&d, 1, TEXTOID);
6547 
6548  index++;
6549  }
6550 
6551  return newarray;
6552 }
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 6561 of file guc.c.

6562 {
6563  ArrayType *newarray;
6564  int i;
6565  int index;
6566 
6567  /* if array is currently null, nothing to do */
6568  if (!array)
6569  return NULL;
6570 
6571  /* if we're superuser, we can delete everything, so just do it */
6572  if (superuser())
6573  return NULL;
6574 
6575  newarray = NULL;
6576  index = 1;
6577 
6578  for (i = 1; i <= ARR_DIMS(array)[0]; i++)
6579  {
6580  Datum d;
6581  char *val;
6582  char *eqsgn;
6583  bool isnull;
6584 
6585  d = array_ref(array, 1, &i,
6586  -1 /* varlenarray */ ,
6587  -1 /* TEXT's typlen */ ,
6588  false /* TEXT's typbyval */ ,
6589  TYPALIGN_INT /* TEXT's typalign */ ,
6590  &isnull);
6591  if (isnull)
6592  continue;
6593  val = TextDatumGetCString(d);
6594 
6595  eqsgn = strchr(val, '=');
6596  *eqsgn = '\0';
6597 
6598  /* skip if we have permission to delete it */
6599  if (validate_option_array_item(val, NULL, true))
6600  continue;
6601 
6602  /* else add it to the output array */
6603  if (newarray)
6604  newarray = array_set(newarray, 1, &index,
6605  d,
6606  false,
6607  -1 /* varlenarray */ ,
6608  -1 /* TEXT's typlen */ ,
6609  false /* TEXT's typbyval */ ,
6610  TYPALIGN_INT /* TEXT's typalign */ );
6611  else
6612  newarray = construct_array_builtin(&d, 1, TEXTOID);
6613 
6614  index++;
6615  pfree(val);
6616  }
6617 
6618  return newarray;
6619 }

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 1525 of file guc.c.

1526 {
1527  HASH_SEQ_STATUS status;
1528  GUCHashEntry *hentry;
1529 
1530  /*
1531  * Before log_line_prefix could possibly receive a nonempty setting, make
1532  * sure that timezone processing is minimally alive (see elog.c).
1533  */
1535 
1536  /*
1537  * Create GUCMemoryContext and build hash table of all GUC variables.
1538  */
1540 
1541  /*
1542  * Load all variables with their compiled-in defaults, and initialize
1543  * status fields as needed.
1544  */
1545  hash_seq_init(&status, guc_hashtab);
1546  while ((hentry = (GUCHashEntry *) hash_seq_search(&status)) != NULL)
1547  {
1548  /* Check mapping between initial and default value */
1549  Assert(check_GUC_init(hentry->gucvar));
1550 
1551  InitializeOneGUCOption(hentry->gucvar);
1552  }
1553 
1554  reporting_enabled = false;
1555 
1556  /*
1557  * Prevent any attempt to override the transaction modes from
1558  * non-interactive sources.
1559  */
1560  SetConfigOption("transaction_isolation", "read committed",
1562  SetConfigOption("transaction_read_only", "no",
1564  SetConfigOption("transaction_deferrable", "no",
1566 
1567  /*
1568  * For historical reasons, some GUC parameters can receive defaults from
1569  * environment variables. Process those settings.
1570  */
1572 }
static void InitializeOneGUCOption(struct config_generic *gconf)
Definition: guc.c:1639
void build_guc_variables(void)
Definition: guc.c:898
static void InitializeGUCOptionsFromEnvironment(void)
Definition: guc.c:1584
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 5198 of file guc.c.

5199 {
5200  int classLen = strlen(className);
5201  HASH_SEQ_STATUS status;
5202  GUCHashEntry *hentry;
5203  MemoryContext oldcontext;
5204 
5205  /*
5206  * Check for existing placeholders. We must actually remove invalid
5207  * placeholders, else future parallel worker startups will fail. (We
5208  * don't bother trying to free associated memory, since this shouldn't
5209  * happen often.)
5210  */
5211  hash_seq_init(&status, guc_hashtab);
5212  while ((hentry = (GUCHashEntry *) hash_seq_search(&status)) != NULL)
5213  {
5214  struct config_generic *var = hentry->gucvar;
5215 
5216  if ((var->flags & GUC_CUSTOM_PLACEHOLDER) != 0 &&
5217  strncmp(className, var->name, classLen) == 0 &&
5218  var->name[classLen] == GUC_QUALIFIER_SEPARATOR)
5219  {
5220  ereport(WARNING,
5221  (errcode(ERRCODE_INVALID_NAME),
5222  errmsg("invalid configuration parameter name \"%s\", removing it",
5223  var->name),
5224  errdetail("\"%s\" is now a reserved prefix.",
5225  className)));
5226  /* Remove it from the hash table */
5228  &var->name,
5229  HASH_REMOVE,
5230  NULL);
5231  /* Remove it from any lists it's in, too */
5232  RemoveGUCFromLists(var);
5233  }
5234  }
5235 
5236  /* And remember the name so we can prevent future mistakes. */
5239  MemoryContextSwitchTo(oldcontext);
5240 }
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:953
static void RemoveGUCFromLists(struct config_generic *gconf)
Definition: guc.c:1756
static List * reserved_class_prefix
Definition: guc.c:71
#define GUC_QUALIFIER_SEPARATOR
Definition: guc.h:204
@ HASH_REMOVE
Definition: hsearch.h:115
List * lappend(List *list, void *datum)
Definition: list.c:339
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:124

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()

◆ parse_int()

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

Definition at line 2854 of file guc.c.

2855 {
2856  /*
2857  * We assume here that double is wide enough to represent any integer
2858  * value with adequate precision.
2859  */
2860  double val;
2861  char *endptr;
2862 
2863  /* To suppress compiler warnings, always set output params */
2864  if (result)
2865  *result = 0;
2866  if (hintmsg)
2867  *hintmsg = NULL;
2868 
2869  /*
2870  * Try to parse as an integer (allowing octal or hex input). If the
2871  * conversion stops at a decimal point or 'e', or overflows, re-parse as
2872  * float. This should work fine as long as we have no unit names starting
2873  * with 'e'. If we ever do, the test could be extended to check for a
2874  * sign or digit after 'e', but for now that's unnecessary.
2875  */
2876  errno = 0;
2877  val = strtol(value, &endptr, 0);
2878  if (*endptr == '.' || *endptr == 'e' || *endptr == 'E' ||
2879  errno == ERANGE)
2880  {
2881  errno = 0;
2882  val = strtod(value, &endptr);
2883  }
2884 
2885  if (endptr == value || errno == ERANGE)
2886  return false; /* no HINT for these cases */
2887 
2888  /* reject NaN (infinities will fail range check below) */
2889  if (isnan(val))
2890  return false; /* treat same as syntax error; no HINT */
2891 
2892  /* allow whitespace between number and unit */
2893  while (isspace((unsigned char) *endptr))
2894  endptr++;
2895 
2896  /* Handle possible unit */
2897  if (*endptr != '\0')
2898  {
2899  if ((flags & GUC_UNIT) == 0)
2900  return false; /* this setting does not accept a unit */
2901 
2903  endptr, (flags & GUC_UNIT),
2904  &val))
2905  {
2906  /* invalid unit, or garbage after the unit; set hint and fail. */
2907  if (hintmsg)
2908  {
2909  if (flags & GUC_UNIT_MEMORY)
2910  *hintmsg = memory_units_hint;
2911  else
2912  *hintmsg = time_units_hint;
2913  }
2914  return false;
2915  }
2916  }
2917 
2918  /* Round to int, then check for overflow */
2919  val = rint(val);
2920 
2921  if (val > INT_MAX || val < INT_MIN)
2922  {
2923  if (hintmsg)
2924  *hintmsg = gettext_noop("Value exceeds integer range.");
2925  return false;
2926  }
2927 
2928  if (result)
2929  *result = (int) val;
2930  return true;
2931 }
#define gettext_noop(x)
Definition: c.h:1185
static bool convert_to_base_unit(double value, const char *unit, int base_unit, double *base_value)
Definition: guc.c:2654
static const char *const memory_units_hint
Definition: guc.c:115
static const char *const time_units_hint
Definition: guc.c:152
#define GUC_UNIT_MEMORY
Definition: guc.h:232

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 2944 of file guc.c.

2945 {
2946  double val;
2947  char *endptr;
2948 
2949  /* To suppress compiler warnings, always set output params */
2950  if (result)
2951  *result = 0;
2952  if (hintmsg)
2953  *hintmsg = NULL;
2954 
2955  errno = 0;
2956  val = strtod(value, &endptr);
2957 
2958  if (endptr == value || errno == ERANGE)
2959  return false; /* no HINT for these cases */
2960 
2961  /* reject NaN (infinities will fail range checks later) */
2962  if (isnan(val))
2963  return false; /* treat same as syntax error; no HINT */
2964 
2965  /* allow whitespace between number and unit */
2966  while (isspace((unsigned char) *endptr))
2967  endptr++;
2968 
2969  /* Handle possible unit */
2970  if (*endptr != '\0')
2971  {
2972  if ((flags & GUC_UNIT) == 0)
2973  return false; /* this setting does not accept a unit */
2974 
2976  endptr, (flags & GUC_UNIT),
2977  &val))
2978  {
2979  /* invalid unit, or garbage after the unit; set hint and fail. */
2980  if (hintmsg)
2981  {
2982  if (flags & GUC_UNIT_MEMORY)
2983  *hintmsg = memory_units_hint;
2984  else
2985  *hintmsg = time_units_hint;
2986  }
2987  return false;
2988  }
2989  }
2990 
2991  if (result)
2992  *result = val;
2993  return true;
2994 }

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 
)

◆ ParseConfigFp()

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

◆ ParseLongOption()

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

Definition at line 6287 of file guc.c.

6288 {
6289  size_t equal_pos;
6290  char *cp;
6291 
6292  Assert(string);
6293  Assert(name);
6294  Assert(value);
6295 
6296  equal_pos = strcspn(string, "=");
6297 
6298  if (string[equal_pos] == '=')
6299  {
6300  *name = palloc(equal_pos + 1);
6301  strlcpy(*name, string, equal_pos + 1);
6302 
6303  *value = pstrdup(&string[equal_pos + 1]);
6304  }
6305  else
6306  {
6307  /* no equal sign in string */
6308  *name = pstrdup(string);
6309  *value = NULL;
6310  }
6311 
6312  for (cp = *name; *cp; cp++)
6313  if (*cp == '-')
6314  *cp = '_';
6315 }
void * palloc(Size size)
Definition: mcxt.c:1201
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45

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

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

◆ ProcessConfigFile()

◆ ProcessGUCArray()

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

Definition at line 6381 of file guc.c.

6383 {
6384  List *gucNames;
6385  List *gucValues;
6386  ListCell *lc1;
6387  ListCell *lc2;
6388 
6389  TransformGUCArray(array, &gucNames, &gucValues);
6390  forboth(lc1, gucNames, lc2, gucValues)
6391  {
6392  char *name = lfirst(lc1);
6393  char *value = lfirst(lc2);
6394 
6395  (void) set_config_option(name, value,
6396  context, source,
6397  action, true, 0, false);
6398 
6399  pfree(name);
6400  pfree(value);
6401  }
6402 
6403  list_free(gucNames);
6404  list_free(gucValues);
6405 }
void TransformGUCArray(ArrayType *array, List **names, List **values)
Definition: guc.c:6324
void list_free(List *list)
Definition: list.c:1546
#define forboth(cell1, list1, cell2, list2)
Definition: pg_list.h:518
static rewind_source * source
Definition: pg_rewind.c:89
Definition: pg_list.h:54

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

Referenced by ApplySetting(), and ProcedureCreate().

◆ ReportChangedGUCOptions()

void ReportChangedGUCOptions ( void  )

Definition at line 2579 of file guc.c.

2580 {
2581  slist_mutable_iter iter;
2582 
2583  /* Quick exit if not (yet) enabled */
2584  if (!reporting_enabled)
2585  return;
2586 
2587  /*
2588  * Since in_hot_standby isn't actually changed by normal GUC actions, we
2589  * need a hack to check whether a new value needs to be reported to the
2590  * client. For speed, we rely on the assumption that it can never
2591  * transition from false to true.
2592  */
2594  SetConfigOption("in_hot_standby", "false",
2596 
2597  /* Transmit new values of interesting variables */
2599  {
2600  struct config_generic *conf = slist_container(struct config_generic,
2601  report_link, iter.cur);
2602 
2603  Assert((conf->flags & GUC_REPORT) && (conf->status & GUC_NEEDS_REPORT));
2604  ReportGUCOption(conf);
2605  conf->status &= ~GUC_NEEDS_REPORT;
2606  slist_delete_current(&iter);
2607  }
2608 }
bool in_hot_standby_guc
Definition: guc_tables.c:620

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 1999 of file guc.c.

2000 {
2001  dlist_mutable_iter iter;
2002 
2003  /* We need only consider GUCs not already at PGC_S_DEFAULT */
2005  {
2006  struct config_generic *gconf = dlist_container(struct config_generic,
2007  nondef_link, iter.cur);
2008 
2009  /* Don't reset non-SET-able values */
2010  if (gconf->context != PGC_SUSET &&
2011  gconf->context != PGC_USERSET)
2012  continue;
2013  /* Don't reset if special exclusion from RESET ALL */
2014  if (gconf->flags & GUC_NO_RESET_ALL)
2015  continue;
2016  /* No need to reset if wasn't SET */
2017  if (gconf->source <= PGC_S_OVERRIDE)
2018  continue;
2019 
2020  /* Save old value to support transaction abort */
2022 
2023  switch (gconf->vartype)
2024  {
2025  case PGC_BOOL:
2026  {
2027  struct config_bool *conf = (struct config_bool *) gconf;
2028 
2029  if (conf->assign_hook)
2030  conf->assign_hook(conf->reset_val,
2031  conf->reset_extra);
2032  *conf->variable = conf->reset_val;
2033  set_extra_field(&conf->gen, &conf->gen.extra,
2034  conf->reset_extra);
2035  break;
2036  }
2037  case PGC_INT:
2038  {
2039  struct config_int *conf = (struct config_int *) gconf;
2040 
2041  if (conf->assign_hook)
2042  conf->assign_hook(conf->reset_val,
2043  conf->reset_extra);
2044  *conf->variable = conf->reset_val;
2045  set_extra_field(&conf->gen, &conf->gen.extra,
2046  conf->reset_extra);
2047  break;
2048  }
2049  case PGC_REAL:
2050  {
2051  struct config_real *conf = (struct config_real *) gconf;
2052 
2053  if (conf->assign_hook)
2054  conf->assign_hook(conf->reset_val,
2055  conf->reset_extra);
2056  *conf->variable = conf->reset_val;
2057  set_extra_field(&conf->gen, &conf->gen.extra,
2058  conf->reset_extra);
2059  break;
2060  }
2061  case PGC_STRING:
2062  {
2063  struct config_string *conf = (struct config_string *) gconf;
2064 
2065  if (conf->assign_hook)
2066  conf->assign_hook(conf->reset_val,
2067  conf->reset_extra);
2068  set_string_field(conf, conf->variable, conf->reset_val);
2069  set_extra_field(&conf->gen, &conf->gen.extra,
2070  conf->reset_extra);
2071  break;
2072  }
2073  case PGC_ENUM:
2074  {
2075  struct config_enum *conf = (struct config_enum *) gconf;
2076 
2077  if (conf->assign_hook)
2078  conf->assign_hook(conf->reset_val,
2079  conf->reset_extra);
2080  *conf->variable = conf->reset_val;
2081  set_extra_field(&conf->gen, &conf->gen.extra,
2082  conf->reset_extra);
2083  break;
2084  }
2085  }
2086 
2087  set_guc_source(gconf, gconf->reset_source);
2088  gconf->scontext = gconf->reset_scontext;
2089  gconf->srole = gconf->reset_srole;
2090 
2091  if ((gconf->flags & GUC_REPORT) && !(gconf->status & GUC_NEEDS_REPORT))
2092  {
2093  gconf->status |= GUC_NEEDS_REPORT;
2095  }
2096  }
2097 }
static void push_old_value(struct config_generic *gconf, GucAction action)
Definition: guc.c:2130
#define GUC_NO_RESET_ALL
Definition: guc.h:214
#define dlist_foreach_modify(iter, lhead)
Definition: ilist.h:640
void * reset_extra
Definition: guc_tables.h:209
bool reset_val
Definition: guc_tables.h:208
void * reset_extra
Definition: guc_tables.h:280
GucContext reset_scontext
Definition: guc_tables.h:168
GucSource source
Definition: guc_tables.h:165
GucSource reset_source
Definition: guc_tables.h:166
void * reset_extra
Definition: guc_tables.h:225
int reset_val
Definition: guc_tables.h:224
void * reset_extra
Definition: guc_tables.h:241
double reset_val
Definition: guc_tables.h:240
void * reset_extra
Definition: guc_tables.h:265
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 6118 of file guc.c.

6119 {
6120  char *varname,
6121  *varvalue,
6122  *varsourcefile;
6123  int varsourceline;
6124  GucSource varsource;
6125  GucContext varscontext;
6126  Oid varsrole;
6127  char *srcptr = (char *) gucstate;
6128  char *srcend;
6129  Size len;
6130  dlist_mutable_iter iter;
6131  ErrorContextCallback error_context_callback;
6132 
6133  /*
6134  * First, ensure that all potentially-shippable GUCs are reset to their
6135  * default values. We must not touch those GUCs that the leader will
6136  * never ship, while there is no need to touch those that are shippable
6137  * but already have their default values. Thus, this ends up being the
6138  * same test that SerializeGUCState uses, even though the sets of
6139  * variables involved may well be different since the leader's set of
6140  * variables-not-at-default-values can differ from the set that are
6141  * not-default in this freshly started worker.
6142  *
6143  * Once we have set all the potentially-shippable GUCs to default values,
6144  * restoring the GUCs that the leader sent (because they had non-default
6145  * values over there) leads us to exactly the set of GUC values that the
6146  * leader has. This is true even though the worker may have initially
6147  * absorbed postgresql.conf settings that the leader hasn't yet seen, or
6148  * ALTER USER/DATABASE SET settings that were established after the leader
6149  * started.
6150  *
6151  * Note that ensuring all the potential target GUCs are at PGC_S_DEFAULT
6152  * also ensures that set_config_option won't refuse to set them because of
6153  * source-priority comparisons.
6154  */
6156  {
6157  struct config_generic *gconf = dlist_container(struct config_generic,
6158  nondef_link, iter.cur);
6159 
6160  /* Do nothing if non-shippable or if already at PGC_S_DEFAULT. */
6161  if (can_skip_gucvar(gconf))
6162  continue;
6163 
6164  /*
6165  * We can use InitializeOneGUCOption to reset the GUC to default, but
6166  * first we must free any existing subsidiary data to avoid leaking
6167  * memory. The stack must be empty, but we have to clean up all other
6168  * fields. Beware that there might be duplicate value or "extra"
6169  * pointers. We also have to be sure to take it out of any lists it's
6170  * in.
6171  */
6172  Assert(gconf->stack == NULL);
6173  guc_free(gconf->extra);
6174  guc_free(gconf->last_reported);
6175  guc_free(gconf->sourcefile);
6176  switch (gconf->vartype)
6177  {
6178  case PGC_BOOL:
6179  {
6180  struct config_bool *conf = (struct config_bool *) gconf;
6181 
6182  if (conf->reset_extra && conf->reset_extra != gconf->extra)
6183  guc_free(conf->reset_extra);
6184  break;
6185  }
6186  case PGC_INT:
6187  {
6188  struct config_int *conf = (struct config_int *) gconf;
6189 
6190  if (conf->reset_extra && conf->reset_extra != gconf->extra)
6191  guc_free(conf->reset_extra);
6192  break;
6193  }
6194  case PGC_REAL:
6195  {
6196  struct config_real *conf = (struct config_real *) gconf;
6197 
6198  if (conf->reset_extra && conf->reset_extra != gconf->extra)
6199  guc_free(conf->reset_extra);
6200  break;
6201  }
6202  case PGC_STRING:
6203  {
6204  struct config_string *conf = (struct config_string *) gconf;
6205 
6206  guc_free(*conf->variable);
6207  if (conf->reset_val && conf->reset_val != *conf->variable)
6208  guc_free(conf->reset_val);
6209  if (conf->reset_extra && conf->reset_extra != gconf->extra)
6210  guc_free(conf->reset_extra);
6211  break;
6212  }
6213  case PGC_ENUM:
6214  {
6215  struct config_enum *conf = (struct config_enum *) gconf;
6216 
6217  if (conf->reset_extra && conf->reset_extra != gconf->extra)
6218  guc_free(conf->reset_extra);
6219  break;
6220  }
6221  }
6222  /* Remove it from any lists it's in. */
6223  RemoveGUCFromLists(gconf);
6224  /* Now we can reset the struct to PGS_S_DEFAULT state. */
6225  InitializeOneGUCOption(gconf);
6226  }
6227 
6228  /* First item is the length of the subsequent data */
6229  memcpy(&len, gucstate, sizeof(len));
6230 
6231  srcptr += sizeof(len);
6232  srcend = srcptr + len;
6233 
6234  /* If the GUC value check fails, we want errors to show useful context. */
6235  error_context_callback.callback = guc_restore_error_context_callback;
6236  error_context_callback.previous = error_context_stack;
6237  error_context_callback.arg = NULL;
6238  error_context_stack = &error_context_callback;
6239 
6240  /* Restore all the listed GUCs. */
6241  while (srcptr < srcend)
6242  {
6243  int result;
6244  char *error_context_name_and_value[2];
6245 
6246  varname = read_gucstate(&srcptr, srcend);
6247  varvalue = read_gucstate(&srcptr, srcend);
6248  varsourcefile = read_gucstate(&srcptr, srcend);
6249  if (varsourcefile[0])
6250  read_gucstate_binary(&srcptr, srcend,
6251  &varsourceline, sizeof(varsourceline));
6252  else
6253  varsourceline = 0;
6254  read_gucstate_binary(&srcptr, srcend,
6255  &varsource, sizeof(varsource));
6256  read_gucstate_binary(&srcptr, srcend,
6257  &varscontext, sizeof(varscontext));
6258  read_gucstate_binary(&srcptr, srcend,
6259  &varsrole, sizeof(varsrole));
6260 
6261  error_context_name_and_value[0] = varname;
6262  error_context_name_and_value[1] = varvalue;
6263  error_context_callback.arg = &error_context_name_and_value[0];
6264  result = set_config_option_ext(varname, varvalue,
6265  varscontext, varsource, varsrole,
6266  GUC_ACTION_SET, true, ERROR, true);
6267  if (result <= 0)
6268  ereport(ERROR,
6269  (errcode(ERRCODE_INTERNAL_ERROR),
6270  errmsg("parameter \"%s\" could not be set", varname)));
6271  if (varsourcefile[0])
6272  set_config_sourcefile(varname, varsourcefile, varsourceline);
6273  error_context_callback.arg = NULL;
6274  }
6275 
6276  error_context_stack = error_context_callback.previous;
6277 }
ErrorContextCallback * error_context_stack
Definition: elog.c:95
static void guc_restore_error_context_callback(void *arg)
Definition: guc.c:6096
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:3354
static void set_config_sourcefile(const char *name, char *sourcefile, int sourceline)
Definition: guc.c:4223
static char * read_gucstate(char **srcptr, char *srcend)
Definition: guc.c:6059
static bool can_skip_gucvar(struct config_generic *gconf)
Definition: guc.c:5733
static void read_gucstate_binary(char **srcptr, char *srcend, void *dest, Size size)
Definition: guc.c:6082
struct ErrorContextCallback * previous
Definition: elog.h:295
void(* callback)(void *arg)
Definition: elog.h:296
char * last_reported
Definition: guc_tables.h:179
char * sourcefile
Definition: guc_tables.h:181

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 1779 of file guc.c.

1780 {
1781  char *configdir;
1782  char *fname;
1783  bool fname_is_malloced;
1784  struct stat stat_buf;
1785  struct config_string *data_directory_rec;
1786 
1787  /* configdir is -D option, or $PGDATA if no -D */
1788  if (userDoption)
1789  configdir = make_absolute_path(userDoption);
1790  else
1791  configdir = make_absolute_path(getenv("PGDATA"));
1792 
1793  if (configdir && stat(configdir, &stat_buf) != 0)
1794  {
1795  write_stderr("%s: could not access directory \"%s\": %s\n",
1796  progname,
1797  configdir,
1798  strerror(errno));
1799  if (errno == ENOENT)
1800  write_stderr("Run initdb or pg_basebackup to initialize a PostgreSQL data directory.\n");
1801  return false;
1802  }
1803 
1804  /*
1805  * Find the configuration file: if config_file was specified on the
1806  * command line, use it, else use configdir/postgresql.conf. In any case
1807  * ensure the result is an absolute path, so that it will be interpreted
1808  * the same way by future backends.
1809  */
1810  if (ConfigFileName)
1811  {
1813  fname_is_malloced = true;
1814  }
1815  else if (configdir)
1816  {
1817  fname = guc_malloc(FATAL,
1818  strlen(configdir) + strlen(CONFIG_FILENAME) + 2);
1819  sprintf(fname, "%s/%s", configdir, CONFIG_FILENAME);
1820  fname_is_malloced = false;
1821  }
1822  else
1823  {
1824  write_stderr("%s does not know where to find the server configuration file.\n"
1825  "You must specify the --config-file or -D invocation "
1826  "option or set the PGDATA environment variable.\n",
1827  progname);
1828  return false;
1829  }
1830 
1831  /*
1832  * Set the ConfigFileName GUC variable to its final value, ensuring that
1833  * it can't be overridden later.
1834  */
1835  SetConfigOption("config_file", fname, PGC_POSTMASTER, PGC_S_OVERRIDE);
1836 
1837  if (fname_is_malloced)
1838  free(fname);
1839  else
1840  guc_free(fname);
1841 
1842  /*
1843  * Now read the config file for the first time.
1844  */
1845  if (stat(ConfigFileName, &stat_buf) != 0)
1846  {
1847  write_stderr("%s: could not access the server configuration file \"%s\": %s\n",
1848  progname, ConfigFileName, strerror(errno));
1849  free(configdir);
1850  return false;
1851  }
1852 
1853  /*
1854  * Read the configuration file for the first time. This time only the
1855  * data_directory parameter is picked up to determine the data directory,
1856  * so that we can read the PG_AUTOCONF_FILENAME file next time.
1857  */
1859 
1860  /*
1861  * If the data_directory GUC variable has been set, use that as DataDir;
1862  * otherwise use configdir if set; else punt.
1863  *
1864  * Note: SetDataDir will copy and absolute-ize its argument, so we don't
1865  * have to.
1866  */
1867  data_directory_rec = (struct config_string *)
1868  find_option("data_directory", false, false, PANIC);
1869  if (*data_directory_rec->variable)
1870  SetDataDir(*data_directory_rec->variable);
1871  else if (configdir)
1872  SetDataDir(configdir);
1873  else
1874  {
1875  write_stderr("%s does not know where to find the database system data.\n"
1876  "This can be specified as data_directory in \"%s\", "
1877  "or by the -D invocation option, or by the "
1878  "PGDATA environment variable.\n",
1880  return false;
1881  }
1882 
1883  /*
1884  * Reflect the final DataDir value back into the data_directory GUC var.
1885  * (If you are wondering why we don't just make them a single variable,
1886  * it's because the EXEC_BACKEND case needs DataDir to be transmitted to
1887  * child backends specially. XXX is that still true? Given that we now
1888  * chdir to DataDir, EXEC_BACKEND can read the config file without knowing
1889  * DataDir in advance.)
1890  */
1892 
1893  /*
1894  * Now read the config file a second time, allowing any settings in the
1895  * PG_AUTOCONF_FILENAME file to take effect. (This is pretty ugly, but
1896  * since we have to determine the DataDir before we can find the autoconf
1897  * file, the alternatives seem worse.)
1898  */
1900 
1901  /*
1902  * If timezone_abbreviations wasn't set in the configuration file, install
1903  * the default value. We do it this way because we can't safely install a
1904  * "real" value until my_exec_path is set, which may not have happened
1905  * when InitializeGUCOptions runs, so the bootstrap default value cannot
1906  * be the real desired default.
1907  */
1909 
1910  /*
1911  * Figure out where pg_hba.conf is, and make sure the path is absolute.
1912  */
1913  if (HbaFileName)
1914  {
1916  fname_is_malloced = true;
1917  }
1918  else if (configdir)
1919  {
1920  fname = guc_malloc(FATAL,
1921  strlen(configdir) + strlen(HBA_FILENAME) + 2);
1922  sprintf(fname, "%s/%s", configdir, HBA_FILENAME);
1923  fname_is_malloced = false;
1924  }
1925  else
1926  {
1927  write_stderr("%s does not know where to find the \"hba\" configuration file.\n"
1928  "This can be specified as \"hba_file\" in \"%s\", "
1929  "or by the -D invocation option, or by the "
1930  "PGDATA environment variable.\n",
1932  return false;
1933  }
1934  SetConfigOption("hba_file", fname, PGC_POSTMASTER, PGC_S_OVERRIDE);
1935 
1936  if (fname_is_malloced)
1937  free(fname);
1938  else
1939  guc_free(fname);
1940 
1941  /*
1942  * Likewise for pg_ident.conf.
1943  */
1944  if (IdentFileName)
1945  {
1947  fname_is_malloced = true;
1948  }
1949  else if (configdir)
1950  {
1951  fname = guc_malloc(FATAL,
1952  strlen(configdir) + strlen(IDENT_FILENAME) + 2);
1953  sprintf(fname, "%s/%s", configdir, IDENT_FILENAME);
1954  fname_is_malloced = false;
1955  }
1956  else
1957  {
1958  write_stderr("%s does not know where to find the \"ident\" configuration file.\n"
1959  "This can be specified as \"ident_file\" in \"%s\", "
1960  "or by the -D invocation option, or by the "
1961  "PGDATA environment variable.\n",
1963  return false;
1964  }
1965  SetConfigOption("ident_file", fname, PGC_POSTMASTER, PGC_S_OVERRIDE);
1966 
1967  if (fname_is_malloced)
1968  free(fname);
1969  else
1970  guc_free(fname);
1971 
1972  free(configdir);
1973 
1974  return true;
1975 }
#define write_stderr(str)
Definition: parallel.c:184
#define FATAL
Definition: elog.h:41
#define PANIC
Definition: elog.h:42
char * DataDir
Definition: globals.c:67
static void pg_timezone_abbrev_initialize(void)
Definition: guc.c:1988
#define IDENT_FILENAME
Definition: guc.c:56
#define HBA_FILENAME
Definition: guc.c:55
#define CONFIG_FILENAME
Definition: guc.c:54
void ProcessConfigFile(GucContext context)
char * HbaFileName
Definition: guc_tables.c:539
char * ConfigFileName
Definition: guc_tables.c:538
char * IdentFileName
Definition: guc_tables.c:540
#define free(a)
Definition: header.h:65
const char * progname
Definition: main.c:45
void SetDataDir(const char *dir)
Definition: miscinit.c:435
char * make_absolute_path(const char *path)
Definition: path.c:729
#define sprintf
Definition: port.h:240
#define strerror
Definition: port.h:251
static const char * userDoption
Definition: postgres.c:160

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 6026 of file guc.c.

6027 {
6028  char *curptr;
6029  Size actual_size;
6030  Size bytes_left;
6031  dlist_iter iter;
6032 
6033  /* Reserve space for saving the actual size of the guc state */
6034  Assert(maxsize > sizeof(actual_size));
6035  curptr = start_address + sizeof(actual_size);
6036  bytes_left = maxsize - sizeof(actual_size);
6037 
6038  /* We need only consider GUCs with source not PGC_S_DEFAULT */
6040  {
6041  struct config_generic *gconf = dlist_container(struct config_generic,
6042  nondef_link, iter.cur);
6043 
6044  serialize_variable(&curptr, &bytes_left, gconf);
6045  }
6046 
6047  /* Store actual size without assuming alignment of start_address. */
6048  actual_size = maxsize - bytes_left - sizeof(actual_size);
6049  memcpy(start_address, &actual_size, sizeof(actual_size));
6050 }
static void serialize_variable(char **destptr, Size *maxbytes, struct config_generic *gconf)
Definition: guc.c:5949

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 3314 of file guc.c.

3318 {
3319  Oid srole;
3320 
3321  /*
3322  * Non-interactive sources should be treated as having all privileges,
3323  * except for PGC_S_CLIENT. Note in particular that this is true for
3324  * pg_db_role_setting sources (PGC_S_GLOBAL etc): we assume a suitable
3325  * privilege check was done when the pg_db_role_setting entry was made.
3326  */
3328  srole = GetUserId();
3329  else
3330  srole = BOOTSTRAP_SUPERUSERID;
3331 
3332  return set_config_with_handle(name, NULL, value,
3333  context, source, srole,
3334  action, changeVal, elevel,
3335  is_reload);
3336 }
int set_config_with_handle(const char *name, config_handle *handle, const char *value, GucContext context, GucSource source, Oid srole, GucAction action, bool changeVal, int elevel, bool is_reload)
Definition: guc.c:3374

References generate_unaccent_rules::action, GetUserId(), name, PGC_S_CLIENT, PGC_S_INTERACTIVE, set_config_with_handle(), 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 3354 of file guc.c.

3358 {
3359  return set_config_with_handle(name, NULL, value,
3360  context, source, srole,
3361  action, changeVal, elevel,
3362  is_reload);
3363 }

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

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

◆ set_config_with_handle()

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

Definition at line 3374 of file guc.c.

3379 {
3380  struct config_generic *record;
3381  union config_var_val newval_union;
3382  void *newextra = NULL;
3383  bool prohibitValueChange = false;
3384  bool makeDefault;
3385 
3386  if (elevel == 0)
3387  {
3388  if (source == PGC_S_DEFAULT || source == PGC_S_FILE)
3389  {
3390  /*
3391  * To avoid cluttering the log, only the postmaster bleats loudly
3392  * about problems with the config file.
3393  */
3394  elevel = IsUnderPostmaster ? DEBUG3 : LOG;
3395  }
3396  else if (source == PGC_S_GLOBAL ||
3397  source == PGC_S_DATABASE ||
3398  source == PGC_S_USER ||
3400  elevel = WARNING;
3401  else
3402  elevel = ERROR;
3403  }
3404 
3405  /*
3406  * GUC_ACTION_SAVE changes are acceptable during a parallel operation,
3407  * because the current worker will also pop the change. We're probably
3408  * dealing with a function having a proconfig entry. Only the function's
3409  * body should observe the change, and peer workers do not share in the
3410  * execution of a function call started by this worker.
3411  *
3412  * Other changes might need to affect other workers, so forbid them.
3413  */
3414  if (IsInParallelMode() && changeVal && action != GUC_ACTION_SAVE)
3415  {
3416  ereport(elevel,
3417  (errcode(ERRCODE_INVALID_TRANSACTION_STATE),
3418  errmsg("cannot set parameters during a parallel operation")));
3419  return -1;
3420  }
3421 
3422  /* if handle is specified, no need to look up option */
3423  if (!handle)
3424  {
3425  record = find_option(name, true, false, elevel);
3426  if (record == NULL)
3427  return 0;
3428  }
3429  else
3430  record = handle;
3431 
3432  /*
3433  * Check if the option can be set at this time. See guc.h for the precise
3434  * rules.
3435  */
3436  switch (record->context)
3437  {
3438  case PGC_INTERNAL:
3439  if (context != PGC_INTERNAL)
3440  {
3441  ereport(elevel,
3442  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3443  errmsg("parameter \"%s\" cannot be changed",
3444  name)));
3445  return 0;
3446  }
3447  break;
3448  case PGC_POSTMASTER:
3449  if (context == PGC_SIGHUP)
3450  {
3451  /*
3452  * We are re-reading a PGC_POSTMASTER variable from
3453  * postgresql.conf. We can't change the setting, so we should
3454  * give a warning if the DBA tries to change it. However,
3455  * because of variant formats, canonicalization by check
3456  * hooks, etc, we can't just compare the given string directly
3457  * to what's stored. Set a flag to check below after we have
3458  * the final storable value.
3459  */
3460  prohibitValueChange = true;
3461  }
3462  else if (context != PGC_POSTMASTER)
3463  {
3464  ereport(elevel,
3465  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3466  errmsg("parameter \"%s\" cannot be changed without restarting the server",
3467  name)));
3468  return 0;
3469  }
3470  break;
3471  case PGC_SIGHUP:
3472  if (context != PGC_SIGHUP && context != PGC_POSTMASTER)
3473  {
3474  ereport(elevel,
3475  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3476  errmsg("parameter \"%s\" cannot be changed now",
3477  name)));
3478  return 0;
3479  }
3480 
3481  /*
3482  * Hmm, the idea of the SIGHUP context is "ought to be global, but
3483  * can be changed after postmaster start". But there's nothing
3484  * that prevents a crafty administrator from sending SIGHUP
3485  * signals to individual backends only.
3486  */
3487  break;
3488  case PGC_SU_BACKEND:
3489  if (context == PGC_BACKEND)
3490  {
3491  /*
3492  * Check whether the requesting user has been granted
3493  * privilege to set this GUC.
3494  */
3495  AclResult aclresult;
3496 
3497  aclresult = pg_parameter_aclcheck(name, srole, ACL_SET);
3498  if (aclresult != ACLCHECK_OK)
3499  {
3500  /* No granted privilege */
3501  ereport(elevel,
3502  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
3503  errmsg("permission denied to set parameter \"%s\"",
3504  name)));
3505  return 0;
3506  }
3507  }
3508  /* fall through to process the same as PGC_BACKEND */
3509  /* FALLTHROUGH */
3510  case PGC_BACKEND:
3511  if (context == PGC_SIGHUP)
3512  {
3513  /*
3514  * If a PGC_BACKEND or PGC_SU_BACKEND parameter is changed in
3515  * the config file, we want to accept the new value in the
3516  * postmaster (whence it will propagate to
3517  * subsequently-started backends), but ignore it in existing
3518  * backends. This is a tad klugy, but necessary because we
3519  * don't re-read the config file during backend start.
3520  *
3521  * However, if changeVal is false then plow ahead anyway since
3522  * we are trying to find out if the value is potentially good,
3523  * not actually use it.
3524  *
3525  * In EXEC_BACKEND builds, this works differently: we load all
3526  * non-default settings from the CONFIG_EXEC_PARAMS file
3527  * during backend start. In that case we must accept
3528  * PGC_SIGHUP settings, so as to have the same value as if
3529  * we'd forked from the postmaster. This can also happen when
3530  * using RestoreGUCState() within a background worker that
3531  * needs to have the same settings as the user backend that
3532  * started it. is_reload will be true when either situation
3533  * applies.
3534  */
3535  if (IsUnderPostmaster && changeVal && !is_reload)
3536  return -1;
3537  }
3538  else if (context != PGC_POSTMASTER &&
3539  context != PGC_BACKEND &&
3540  context != PGC_SU_BACKEND &&
3541  source != PGC_S_CLIENT)
3542  {
3543  ereport(elevel,
3544  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3545  errmsg("parameter \"%s\" cannot be set after connection start",
3546  name)));
3547  return 0;
3548  }
3549  break;
3550  case PGC_SUSET:
3551  if (context == PGC_USERSET || context == PGC_BACKEND)
3552  {
3553  /*
3554  * Check whether the requesting user has been granted
3555  * privilege to set this GUC.
3556  */
3557  AclResult aclresult;
3558 
3559  aclresult = pg_parameter_aclcheck(name, srole, ACL_SET);
3560  if (aclresult != ACLCHECK_OK)
3561  {
3562  /* No granted privilege */
3563  ereport(elevel,
3564  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
3565  errmsg("permission denied to set parameter \"%s\"",
3566  name)));
3567  return 0;
3568  }
3569  }
3570  break;
3571  case PGC_USERSET:
3572  /* always okay */
3573  break;
3574  }
3575 
3576  /*
3577  * Disallow changing GUC_NOT_WHILE_SEC_REST values if we are inside a
3578  * security restriction context. We can reject this regardless of the GUC
3579  * context or source, mainly because sources that it might be reasonable
3580  * to override for won't be seen while inside a function.
3581  *
3582  * Note: variables marked GUC_NOT_WHILE_SEC_REST should usually be marked
3583  * GUC_NO_RESET_ALL as well, because ResetAllOptions() doesn't check this.
3584  * An exception might be made if the reset value is assumed to be "safe".
3585  *
3586  * Note: this flag is currently used for "session_authorization" and
3587  * "role". We need to prohibit changing these inside a local userid
3588  * context because when we exit it, GUC won't be notified, leaving things
3589  * out of sync. (This could be fixed by forcing a new GUC nesting level,
3590  * but that would change behavior in possibly-undesirable ways.) Also, we
3591  * prohibit changing these in a security-restricted operation because
3592  * otherwise RESET could be used to regain the session user's privileges.
3593  */
3594  if (record->flags & GUC_NOT_WHILE_SEC_REST)
3595  {
3596  if (InLocalUserIdChange())
3597  {
3598  /*
3599  * Phrasing of this error message is historical, but it's the most
3600  * common case.
3601  */
3602  ereport(elevel,
3603  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
3604  errmsg("cannot set parameter \"%s\" within security-definer function",
3605  name)));
3606  return 0;
3607  }
3609  {
3610  ereport(elevel,
3611  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
3612  errmsg("cannot set parameter \"%s\" within security-restricted operation",
3613  name)));
3614  return 0;
3615  }
3616  }
3617 
3618  /* Disallow resetting and saving GUC_NO_RESET values */
3619  if (record->flags & GUC_NO_RESET)
3620  {
3621  if (value == NULL)
3622  {
3623  ereport(elevel,
3624  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3625  errmsg("parameter \"%s\" cannot be reset", name)));
3626  return 0;
3627  }
3628  if (action == GUC_ACTION_SAVE)
3629  {
3630  ereport(elevel,
3631  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3632  errmsg("parameter \"%s\" cannot be set locally in functions",
3633  name)));
3634  return 0;
3635  }
3636  }
3637 
3638  /*
3639  * Should we set reset/stacked values? (If so, the behavior is not
3640  * transactional.) This is done either when we get a default value from
3641  * the database's/user's/client's default settings or when we reset a
3642  * value to its default.
3643  */
3644  makeDefault = changeVal && (source <= PGC_S_OVERRIDE) &&
3645  ((value != NULL) || source == PGC_S_DEFAULT);
3646 
3647  /*
3648  * Ignore attempted set if overridden by previously processed setting.
3649  * However, if changeVal is false then plow ahead anyway since we are
3650  * trying to find out if the value is potentially good, not actually use
3651  * it. Also keep going if makeDefault is true, since we may want to set
3652  * the reset/stacked values even if we can't set the variable itself.
3653  */
3654  if (record->source > source)
3655  {
3656  if (changeVal && !makeDefault)
3657  {
3658  elog(DEBUG3, "\"%s\": setting ignored because previous source is higher priority",
3659  name);
3660  return -1;
3661  }
3662  changeVal = false;
3663  }
3664 
3665  /*
3666  * Evaluate value and set variable.
3667  */
3668  switch (record->vartype)
3669  {
3670  case PGC_BOOL:
3671  {
3672  struct config_bool *conf = (struct config_bool *) record;
3673 
3674 #define newval (newval_union.boolval)
3675 
3676  if (value)
3677  {
3678  if (!parse_and_validate_value(record, name, value,
3679  source, elevel,
3680  &newval_union, &newextra))
3681  return 0;
3682  }
3683  else if (source == PGC_S_DEFAULT)
3684  {
3685  newval = conf->boot_val;
3686  if (!call_bool_check_hook(conf, &newval, &newextra,
3687  source, elevel))
3688  return 0;
3689  }
3690  else
3691  {
3692  newval = conf->reset_val;
3693  newextra = conf->reset_extra;
3694  source = conf->gen.reset_source;
3695  context = conf->gen.reset_scontext;
3696  srole = conf->gen.reset_srole;
3697  }
3698 
3699  if (prohibitValueChange)
3700  {
3701  /* Release newextra, unless it's reset_extra */
3702  if (newextra && !extra_field_used(&conf->gen, newextra))
3703  guc_free(newextra);
3704 
3705  if (*conf->variable != newval)
3706  {
3707  record->status |= GUC_PENDING_RESTART;
3708  ereport(elevel,
3709  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3710  errmsg("parameter \"%s\" cannot be changed without restarting the server",
3711  name)));
3712  return 0;
3713  }
3714  record->status &= ~GUC_PENDING_RESTART;
3715  return -1;
3716  }
3717 
3718  if (changeVal)
3719  {
3720  /* Save old value to support transaction abort */
3721  if (!makeDefault)
3722  push_old_value(&conf->gen, action);
3723 
3724  if (conf->assign_hook)
3725  conf->assign_hook(newval, newextra);
3726  *conf->variable = newval;
3727  set_extra_field(&conf->gen, &conf->gen.extra,
3728  newextra);
3729  set_guc_source(&conf->gen, source);
3730  conf->gen.scontext = context;
3731  conf->gen.srole = srole;
3732  }
3733  if (makeDefault)
3734  {
3735  GucStack *stack;
3736 
3737  if (conf->gen.reset_source <= source)
3738  {
3739  conf->reset_val = newval;
3740  set_extra_field(&conf->gen, &conf->reset_extra,
3741  newextra);
3742  conf->gen.reset_source = source;
3743  conf->gen.reset_scontext = context;
3744  conf->gen.reset_srole = srole;
3745  }
3746  for (stack = conf->gen.stack; stack; stack = stack->prev)
3747  {
3748  if (stack->source <= source)
3749  {
3750  stack->prior.val.boolval = newval;
3751  set_extra_field(&conf->gen, &stack->prior.extra,
3752  newextra);
3753  stack->source = source;
3754  stack->scontext = context;
3755  stack->srole = srole;
3756  }
3757  }
3758  }
3759 
3760  /* Perhaps we didn't install newextra anywhere */
3761  if (newextra && !extra_field_used(&conf->gen, newextra))
3762  guc_free(newextra);
3763  break;
3764 
3765 #undef newval
3766  }
3767 
3768  case PGC_INT:
3769  {
3770  struct config_int *conf = (struct config_int *) record;
3771 
3772 #define newval (newval_union.intval)
3773 
3774  if (value)
3775  {
3776  if (!parse_and_validate_value(record, name, value,
3777  source, elevel,
3778  &newval_union, &newextra))
3779  return 0;
3780  }
3781  else if (source == PGC_S_DEFAULT)
3782  {
3783  newval = conf->boot_val;
3784  if (!call_int_check_hook(conf, &newval, &newextra,
3785  source, elevel))
3786  return 0;
3787  }
3788  else
3789  {
3790  newval = conf->reset_val;
3791  newextra = conf->reset_extra;
3792  source = conf->gen.reset_source;
3793  context = conf->gen.reset_scontext;
3794  srole = conf->gen.reset_srole;
3795  }
3796 
3797  if (prohibitValueChange)
3798  {
3799  /* Release newextra, unless it's reset_extra */
3800  if (newextra && !extra_field_used(&conf->gen, newextra))
3801  guc_free(newextra);
3802 
3803  if (*conf->variable != newval)
3804  {
3805  record->status |= GUC_PENDING_RESTART;
3806  ereport(elevel,
3807  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3808  errmsg("parameter \"%s\" cannot be changed without restarting the server",
3809  name)));
3810  return 0;
3811  }
3812  record->status &= ~GUC_PENDING_RESTART;
3813  return -1;
3814  }
3815 
3816  if (changeVal)
3817  {
3818  /* Save old value to support transaction abort */
3819  if (!makeDefault)
3820  push_old_value(&conf->gen, action);
3821 
3822  if (conf->assign_hook)
3823  conf->assign_hook(newval, newextra);
3824  *conf->variable = newval;
3825  set_extra_field(&conf->gen, &conf->gen.extra,
3826  newextra);
3827  set_guc_source(&conf->gen, source);
3828  conf->gen.scontext = context;
3829  conf->gen.srole = srole;
3830  }
3831  if (makeDefault)
3832  {
3833  GucStack *stack;
3834 
3835  if (conf->gen.reset_source <= source)
3836  {
3837  conf->reset_val = newval;
3838  set_extra_field(&conf->gen, &conf->reset_extra,
3839  newextra);
3840  conf->gen.reset_source = source;
3841  conf->gen.reset_scontext = context;
3842  conf->gen.reset_srole = srole;
3843  }
3844  for (stack = conf->gen.stack; stack; stack = stack->prev)
3845  {
3846  if (stack->source <= source)
3847  {
3848  stack->prior.val.intval = newval;
3849  set_extra_field(&conf->gen, &stack->prior.extra,
3850  newextra);
3851  stack->source = source;
3852  stack->scontext = context;
3853  stack->srole = srole;
3854  }
3855  }
3856  }
3857 
3858  /* Perhaps we didn't install newextra anywhere */
3859  if (newextra && !extra_field_used(&conf->gen, newextra))
3860  guc_free(newextra);
3861  break;
3862 
3863 #undef newval
3864  }
3865 
3866  case PGC_REAL:
3867  {
3868  struct config_real *conf = (struct config_real *) record;
3869 
3870 #define newval (newval_union.realval)
3871 
3872  if (value)
3873  {
3874  if (!parse_and_validate_value(record, name, value,
3875  source, elevel,
3876  &newval_union, &newextra))
3877  return 0;
3878  }
3879  else if (source == PGC_S_DEFAULT)
3880  {
3881  newval = conf->boot_val;
3882  if (!call_real_check_hook(conf, &newval, &newextra,
3883  source, elevel))
3884  return 0;
3885  }
3886  else
3887  {
3888  newval = conf->reset_val;
3889  newextra = conf->reset_extra;
3890  source = conf->gen.reset_source;
3891  context = conf->gen.reset_scontext;
3892  srole = conf->gen.reset_srole;
3893  }
3894 
3895  if (prohibitValueChange)
3896  {
3897  /* Release newextra, unless it's reset_extra */
3898  if (newextra && !extra_field_used(&conf->gen, newextra))
3899  guc_free(newextra);
3900 
3901  if (*conf->variable != newval)
3902  {
3903  record->status |= GUC_PENDING_RESTART;
3904  ereport(elevel,
3905  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
3906  errmsg("parameter \"%s\" cannot be changed without restarting the server",
3907  name)));
3908  return 0;
3909  }
3910  record->status &= ~GUC_PENDING_RESTART;
3911  return -1;
3912  }
3913 
3914  if (changeVal)
3915  {
3916  /* Save old value to support transaction abort */
3917  if (!makeDefault)
3918  push_old_value(&conf->gen, action);
3919 
3920  if (conf->assign_hook)
3921  conf->assign_hook(newval, newextra);
3922  *conf->variable = newval;
3923  set_extra_field(&conf->gen, &conf->gen.extra,
3924  newextra);
3925  set_guc_source(&conf->gen, source);
3926  conf->gen.scontext = context;
3927  conf->gen.srole = srole;
3928  }
3929  if (makeDefault)
3930  {
3931  GucStack *stack;
3932 
3933  if (conf->gen.reset_source <= source)
3934  {
3935  conf->reset_val = newval;
3936  set_extra_field(&conf->gen, &conf->reset_extra,
3937  newextra);
3938  conf->gen.reset_source = source;
3939  conf->gen.reset_scontext = context;
3940  conf->gen.reset_srole = srole;
3941  }
3942  for (stack = conf->gen.stack; stack; stack = stack->prev)
3943  {
3944  if (stack->source <= source)
3945  {
3946  stack->prior.val.realval = newval;
3947  set_extra_field(&conf->gen, &stack->prior.extra,
3948  newextra);
3949  stack->source = source;
3950  stack->scontext = context;
3951  stack->srole = srole;
3952  }
3953  }
3954  }
3955 
3956  /* Perhaps we didn't install newextra anywhere */
3957  if (newextra && !extra_field_used(&conf->gen, newextra))
3958  guc_free(newextra);
3959  break;
3960 
3961 #undef newval
3962  }
3963 
3964  case PGC_STRING:
3965  {
3966  struct config_string *conf = (struct config_string *) record;
3967 
3968 #define newval (newval_union.stringval)
3969 
3970  if (value)
3971  {
3972  if (!parse_and_validate_value(record, name, value,
3973  source, elevel,
3974  &newval_union, &newextra))
3975  return 0;
3976  }
3977  else if (source == PGC_S_DEFAULT)
3978  {
3979  /* non-NULL boot_val must always get strdup'd */
3980  if (conf->boot_val != NULL)
3981  {
3982  newval = guc_strdup(elevel, conf->boot_val);
3983  if (newval == NULL)
3984  return 0;
3985  }
3986  else
3987  newval = NULL;
3988 
3989  if (!call_string_check_hook(conf, &newval, &newextra,
3990  source, elevel))
3991  {
3992  guc_free(newval);
3993  return 0;
3994  }
3995  }
3996  else
3997  {
3998  /*
3999  * strdup not needed, since reset_val is already under
4000  * guc.c's control
4001  */
4002  newval = conf->reset_val;
4003  newextra = conf->reset_extra;
4004  source = conf->gen.reset_source;
4005  context = conf->gen.reset_scontext;
4006  srole = conf->gen.reset_srole;
4007  }
4008 
4009  if (prohibitValueChange)
4010  {
4011  bool newval_different;
4012 
4013  /* newval shouldn't be NULL, so we're a bit sloppy here */
4014  newval_different = (*conf->variable == NULL ||
4015  newval == NULL ||
4016  strcmp(*conf->variable, newval) != 0);
4017 
4018  /* Release newval, unless it's reset_val */
4019  if (newval && !string_field_used(conf, newval))
4020  guc_free(newval);
4021  /* Release newextra, unless it's reset_extra */
4022  if (newextra && !extra_field_used(&conf->gen, newextra))
4023  guc_free(newextra);
4024 
4025  if (newval_different)
4026  {
4027  record->status |= GUC_PENDING_RESTART;
4028  ereport(elevel,
4029  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
4030  errmsg("parameter \"%s\" cannot be changed without restarting the server",
4031  name)));
4032  return 0;
4033  }
4034  record->status &= ~GUC_PENDING_RESTART;
4035  return -1;
4036  }
4037 
4038  if (changeVal)
4039  {
4040  /* Save old value to support transaction abort */
4041  if (!makeDefault)
4042  push_old_value(&conf->gen, action);
4043 
4044  if (conf->assign_hook)
4045  conf->assign_hook(newval, newextra);
4046  set_string_field(conf, conf->variable, newval);
4047  set_extra_field(&conf->gen, &conf->gen.extra,
4048  newextra);
4049  set_guc_source(&conf->gen, source);
4050  conf->gen.scontext = context;
4051  conf->gen.srole = srole;
4052  }
4053 
4054  if (makeDefault)
4055  {
4056  GucStack *stack;
4057 
4058  if (conf->gen.reset_source <= source)
4059  {
4060  set_string_field(conf, &conf->reset_val, newval);
4061  set_extra_field(&conf->gen, &conf->reset_extra,
4062  newextra);
4063  conf->gen.reset_source = source;
4064  conf->gen.reset_scontext = context;
4065  conf->gen.reset_srole = srole;
4066  }
4067  for (stack = conf->gen.stack; stack; stack = stack->prev)
4068  {
4069  if (stack->source <= source)
4070  {
4071  set_string_field(conf, &stack->prior.val.stringval,
4072  newval);
4073  set_extra_field(&conf->gen, &stack->prior.extra,
4074  newextra);
4075  stack->source = source;
4076  stack->scontext = context;
4077  stack->srole = srole;
4078  }
4079  }
4080  }
4081 
4082  /* Perhaps we didn't install newval anywhere */
4083  if (newval && !string_field_used(conf, newval))
4084  guc_free(newval);
4085  /* Perhaps we didn't install newextra anywhere */
4086  if (newextra && !extra_field_used(&conf->gen, newextra))
4087  guc_free(newextra);
4088  break;
4089 
4090 #undef newval
4091  }
4092 
4093  case PGC_ENUM:
4094  {
4095  struct config_enum *conf = (struct config_enum *) record;
4096 
4097 #define newval (newval_union.enumval)
4098 
4099  if (value)
4100  {
4101  if (!parse_and_validate_value(record, name, value,
4102  source, elevel,
4103  &newval_union, &newextra))
4104  return 0;
4105  }
4106  else if (source == PGC_S_DEFAULT)
4107  {
4108  newval = conf->boot_val;
4109  if (!call_enum_check_hook(conf, &newval, &newextra,
4110  source, elevel))
4111  return 0;
4112  }
4113  else
4114  {
4115  newval = conf->reset_val;
4116  newextra = conf->reset_extra;
4117  source = conf->gen.reset_source;
4118  context = conf->gen.reset_scontext;
4119  srole = conf->gen.reset_srole;
4120  }
4121 
4122  if (prohibitValueChange)
4123  {
4124  /* Release newextra, unless it's reset_extra */
4125  if (newextra && !extra_field_used(&conf->gen, newextra))
4126  guc_free(newextra);
4127 
4128  if (*conf->variable != newval)
4129  {
4130  record->status |= GUC_PENDING_RESTART;
4131  ereport(elevel,
4132  (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
4133  errmsg("parameter \"%s\" cannot be changed without restarting the server",
4134  name)));
4135  return 0;
4136  }
4137  record->status &= ~GUC_PENDING_RESTART;
4138  return -1;
4139  }
4140 
4141  if (changeVal)
4142  {
4143  /* Save old value to support transaction abort */
4144  if (!makeDefault)
4145  push_old_value(&conf->gen, action);
4146 
4147  if (conf->assign_hook)
4148  conf->assign_hook(newval, newextra);
4149  *conf->variable = newval;
4150  set_extra_field(&conf->gen, &conf->gen.extra,
4151  newextra);
4152  set_guc_source(&conf->gen, source);
4153  conf->gen.scontext = context;
4154  conf->gen.srole = srole;
4155  }
4156  if (makeDefault)
4157  {
4158  GucStack *stack;
4159 
4160  if (conf->gen.reset_source <= source)
4161  {
4162  conf->reset_val = newval;
4163  set_extra_field(&conf->gen, &conf->reset_extra,
4164  newextra);
4165  conf->gen.reset_source = source;
4166  conf->gen.reset_scontext = context;
4167  conf->gen.reset_srole = srole;
4168  }
4169  for (stack = conf->gen.stack; stack; stack = stack->prev)
4170  {
4171  if (stack->source <= source)
4172  {
4173  stack->prior.val.enumval = newval;
4174  set_extra_field(&conf->gen, &stack->prior.extra,
4175  newextra);
4176  stack->source = source;
4177  stack->scontext = context;
4178  stack->srole = srole;
4179  }
4180  }
4181  }
4182 
4183  /* Perhaps we didn't install newextra anywhere */
4184  if (newextra && !extra_field_used(&conf->gen, newextra))
4185  guc_free(newextra);
4186  break;
4187 
4188 #undef newval
4189  }
4190  }
4191 
4192  if (changeVal && (record->flags & GUC_REPORT) &&
4193  !(record->status & GUC_NEEDS_REPORT))
4194  {
4195  record->status |= GUC_NEEDS_REPORT;
4197  }
4198 
4199  return changeVal ? 1 : -1;
4200 }
#define DEBUG3
Definition: elog.h:28
bool IsUnderPostmaster
Definition: globals.c:116
static bool call_string_check_hook(struct config_string *conf, char **newval, void **extra, GucSource source, int elevel)
Definition: guc.c:6825
static bool extra_field_used(struct config_generic *gconf, void *extra)
Definition: guc.c:742
static void static bool call_bool_check_hook(struct config_bool *conf, bool *newval, void **extra, GucSource source, int elevel)
Definition: guc.c:6723
static bool call_int_check_hook(struct config_int *conf, int *newval, void **extra, GucSource source, int elevel)
Definition: guc.c:6757
char * guc_strdup(int elevel, const char *src)
Definition: guc.c:672
static bool string_field_used(struct config_string *conf, char *strval)
Definition: guc.c:703
static bool call_real_check_hook(struct config_real *conf, double *newval, void **extra, GucSource source, int elevel)
Definition: guc.c:6791
static bool call_enum_check_hook(struct config_enum *conf, int *newval, void **extra, GucSource source, int elevel)
Definition: guc.c:6875
#define GUC_NO_RESET
Definition: guc.h:213
#define GUC_NOT_WHILE_SEC_REST
Definition: guc.h:222
#define GUC_PENDING_RESTART
Definition: guc_tables.h:192
bool InSecurityRestrictedOperation(void)
Definition: miscinit.c:663
bool InLocalUserIdChange(void)
Definition: miscinit.c:654
bool boot_val
Definition: guc_tables.h:203
int boot_val
Definition: guc_tables.h:217
double boot_val
Definition: guc_tables.h:233
const char * boot_val
Definition: guc_tables.h:259

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 fmgr_security_definer(), set_config_option(), and set_config_option_ext().

◆ SetConfigOption()

◆ 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,
324  is_local ? GUC_ACTION_LOCAL : GUC_ACTION_SET,
325  true, 0, false);
326 }

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

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

◆ TransformGUCArray()

void TransformGUCArray ( ArrayType array,
List **  configNames,
List **  configValues 
)

Definition at line 6324 of file guc.c.

6325 {
6326  int i;
6327 
6328  Assert(array != NULL);
6329  Assert(ARR_ELEMTYPE(array) == TEXTOID);
6330  Assert(ARR_NDIM(array) == 1);
6331  Assert(ARR_LBOUND(array)[0] == 1);
6332 
6333  *names = NIL;
6334  *values = NIL;
6335  for (i = 1; i <= ARR_DIMS(array)[0]; i++)
6336  {
6337  Datum d;
6338  bool isnull;
6339  char *s;
6340  char *name;
6341  char *value;
6342 
6343  d = array_ref(array, 1, &i,
6344  -1 /* varlenarray */ ,
6345  -1 /* TEXT's typlen */ ,
6346  false /* TEXT's typbyval */ ,
6347  TYPALIGN_INT /* TEXT's typalign */ ,
6348  &isnull);
6349 
6350  if (isnull)
6351  continue;
6352 
6353  s = TextDatumGetCString(d);
6354 
6355  ParseLongOption(s, &name, &value);
6356  if (!value)
6357  {
6358  ereport(WARNING,
6359  (errcode(ERRCODE_SYNTAX_ERROR),
6360  errmsg("could not parse setting for parameter \"%s\"",
6361  name)));
6362  pfree(name);
6363  continue;
6364  }
6365 
6366  *names = lappend(*names, name);
6367  *values = lappend(*values, value);
6368 
6369  pfree(s);
6370  }
6371 }
static Datum values[MAXATTR]
Definition: bootstrap.c:156
void ParseLongOption(const char *string, char **name, char **value)
Definition: guc.c:6287
#define NIL
Definition: pg_list.h:68

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

Referenced by fmgr_security_definer(), and ProcessGUCArray().

Variable Documentation

◆ application_name

◆ backtrace_functions

PGDLLIMPORT char* backtrace_functions
extern

Definition at line 530 of file guc_tables.c.

Referenced by errfinish().

◆ backtrace_on_internal_error

PGDLLIMPORT bool backtrace_on_internal_error
extern

Definition at line 531 of file guc_tables.c.

Referenced by errfinish().

◆ check_function_bodies

◆ client_min_messages

PGDLLIMPORT int client_min_messages
extern

Definition at line 522 of file guc_tables.c.

Referenced by execute_extension_script(), and should_output_to_client().

◆ cluster_name

◆ ConfigFileName

PGDLLIMPORT char* ConfigFileName
extern

Definition at line 538 of file guc_tables.c.

Referenced by ProcessConfigFileInternal(), and SelectConfigFiles().

◆ current_role_is_superuser

PGDLLIMPORT bool current_role_is_superuser
extern

Definition at line 518 of file guc_tables.c.

Referenced by InitializeParallelDSM().

◆ Debug_pretty_print

PGDLLIMPORT bool Debug_pretty_print
extern

Definition at line 500 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 498 of file guc_tables.c.

Referenced by pg_rewrite_query().

◆ Debug_print_plan

PGDLLIMPORT bool Debug_print_plan
extern

Definition at line 497 of file guc_tables.c.

Referenced by pg_plan_query().

◆ Debug_print_rewritten

PGDLLIMPORT bool Debug_print_rewritten
extern

Definition at line 499 of file guc_tables.c.

Referenced by pg_rewrite_query().

◆ external_pid_file

PGDLLIMPORT char* external_pid_file
extern

Definition at line 541 of file guc_tables.c.

Referenced by PostmasterMain(), and unlink_external_pid_file().

◆ GUC_check_errdetail_string

PGDLLIMPORT char* GUC_check_errdetail_string
extern

◆ GUC_check_errhint_string

PGDLLIMPORT char* GUC_check_errhint_string
extern

◆ GUC_check_errmsg_string

PGDLLIMPORT char* GUC_check_errmsg_string
extern

◆ HbaFileName

◆ IdentFileName

PGDLLIMPORT char* IdentFileName
extern

◆ log_btree_build_stats

PGDLLIMPORT bool log_btree_build_stats
extern

◆ log_duration

PGDLLIMPORT bool log_duration
extern

Definition at line 496 of file guc_tables.c.

Referenced by check_log_duration().

◆ log_executor_stats

PGDLLIMPORT bool log_executor_stats
extern

Definition at line 504 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 523 of file guc_tables.c.

Referenced by check_log_duration().

◆ log_min_duration_statement

PGDLLIMPORT int log_min_duration_statement
extern

Definition at line 524 of file guc_tables.c.

Referenced by check_log_duration().

◆ log_min_error_statement

PGDLLIMPORT int log_min_error_statement
extern

Definition at line 520 of file guc_tables.c.

Referenced by check_log_of_query().

◆ log_min_messages

PGDLLIMPORT int log_min_messages
extern

Definition at line 521 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 525 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 526 of file guc_tables.c.

Referenced by bind_param_error_callback(), and exec_bind_message().

◆ log_parser_stats

◆ log_planner_stats

PGDLLIMPORT bool log_planner_stats
extern

Definition at line 503 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 528 of file guc_tables.c.

Referenced by check_log_duration().

◆ log_statement_stats

◆ log_temp_files

PGDLLIMPORT int log_temp_files
extern

Definition at line 527 of file guc_tables.c.

Referenced by ReportTemporaryFileUsage().

◆ log_xact_sample_rate

PGDLLIMPORT double log_xact_sample_rate
extern

Definition at line 529 of file guc_tables.c.

Referenced by StartTransaction().

◆ num_temp_buffers

PGDLLIMPORT int num_temp_buffers
extern

Definition at line 535 of file guc_tables.c.

Referenced by InitLocalBuffers().

◆ tcp_keepalives_count

PGDLLIMPORT int tcp_keepalives_count
extern

Definition at line 547 of file guc_tables.c.

Referenced by StreamConnection().

◆ tcp_keepalives_idle

PGDLLIMPORT int tcp_keepalives_idle
extern

Definition at line 545 of file guc_tables.c.

Referenced by StreamConnection().

◆ tcp_keepalives_interval

PGDLLIMPORT int tcp_keepalives_interval
extern

Definition at line 546 of file guc_tables.c.

Referenced by StreamConnection().

◆ tcp_user_timeout

PGDLLIMPORT int tcp_user_timeout
extern

Definition at line 548 of file guc_tables.c.

Referenced by StreamConnection().

◆ temp_file_limit

PGDLLIMPORT int temp_file_limit
extern

Definition at line 533 of file guc_tables.c.

Referenced by FileWriteV().