* External declarations pertaining to backend/utils/misc/guc.c and
* backend/utils/misc/guc-file.l
*
- * Copyright (c) 2000-2011, PostgreSQL Global Development Group
+ * Copyright (c) 2000-2017, PostgreSQL Global Development Group
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* src/include/utils/guc.h
#include "utils/array.h"
+/* upper limit for GUC variables measured in kilobytes of memory */
+/* note that various places assume the byte size fits in a "long" variable */
+#if SIZEOF_SIZE_T > 4 && SIZEOF_LONG > 4
+#define MAX_KILOBYTES INT_MAX
+#else
+#define MAX_KILOBYTES (INT_MAX / 1024)
+#endif
+
+/*
+ * Automatic configuration file name for ALTER SYSTEM.
+ * This file will be used to store values of configuration parameters
+ * set by ALTER SYSTEM command.
+ */
+#define PG_AUTOCONF_FILENAME "postgresql.auto.conf"
+
/*
* Certain options can only be set at certain times. The rules are
* like this:
* certain point in their main loop. It's safer to wait than to read a
* file asynchronously.)
*
- * BACKEND options can only be set at postmaster startup, from the
- * configuration file, or by client request in the connection startup
- * packet (e.g., from libpq's PGOPTIONS variable). Furthermore, an
- * already-started backend will ignore changes to such an option in the
- * configuration file. The idea is that these options are fixed for a
- * given backend once it's started, but they can vary across backends.
+ * BACKEND and SU_BACKEND options can only be set at postmaster startup,
+ * from the configuration file, or by client request in the connection
+ * startup packet (e.g., from libpq's PGOPTIONS variable). SU_BACKEND
+ * options can be set from the startup packet only when the user is a
+ * superuser. Furthermore, an already-started backend will ignore changes
+ * to such an option in the configuration file. The idea is that these
+ * options are fixed for a given backend once it's started, but they can
+ * vary across backends.
*
* SUSET options can be set at postmaster startup, with the SIGHUP
- * mechanism, or from SQL if you're a superuser.
+ * mechanism, or from the startup packet or SQL if you're a superuser.
*
* USERSET options can be set by anyone any time.
*/
PGC_INTERNAL,
PGC_POSTMASTER,
PGC_SIGHUP,
+ PGC_SU_BACKEND,
PGC_BACKEND,
PGC_SUSET,
PGC_USERSET
* dividing line between "interactive" and "non-interactive" sources for
* error reporting purposes.
*
- * PGC_S_TEST is used when testing values to be stored as per-database or
- * per-user defaults ("doit" will always be false, so this never gets stored
- * as the actual source of any value). This is an interactive case, but
- * it needs its own source value because some assign hooks need to make
- * different validity checks in this case.
+ * PGC_S_TEST is used when testing values to be used later ("doit" will always
+ * be false, so this never gets stored as the actual source of any value).
+ * For example, ALTER DATABASE/ROLE tests proposed per-database or per-user
+ * defaults this way, and CREATE FUNCTION tests proposed function SET clauses
+ * this way. This is an interactive case, but it needs its own source value
+ * because some assign hooks need to make different validity checks in this
+ * case. In particular, references to nonexistent database objects generally
+ * shouldn't throw hard errors in this case, at most NOTICEs, since the
+ * objects might exist by the time the setting is used for real.
*
* NB: see GucSource_Names in guc.c if you change this.
*/
typedef enum
{
- PGC_S_DEFAULT, /* wired-in default */
+ PGC_S_DEFAULT, /* hard-wired default ("boot_val") */
+ PGC_S_DYNAMIC_DEFAULT, /* default computed during initialization */
PGC_S_ENV_VAR, /* postmaster environment variable */
PGC_S_FILE, /* postgresql.conf */
PGC_S_ARGV, /* postmaster command line */
+ PGC_S_GLOBAL, /* global in-database setting */
PGC_S_DATABASE, /* per-database setting */
PGC_S_USER, /* per-user setting */
PGC_S_DATABASE_USER, /* per-user-and-database setting */
} GucSource;
/*
- * Parsing the configuation file will return a list of name-value pairs
+ * Parsing the configuration file(s) will return a list of name-value pairs
+ * with source location info. We also abuse this data structure to carry
+ * error reports about the config files. An entry reporting an error will
+ * have errmsg != NULL, and might have NULLs for name, value, and/or filename.
+ *
+ * If "ignore" is true, don't attempt to apply the item (it might be an error
+ * report, or an item we determined to be duplicate). "applied" is set true
+ * if we successfully applied, or could have applied, the setting.
*/
typedef struct ConfigVariable
{
- char *name;
- char *value;
+ char *name;
+ char *value;
+ char *errmsg;
char *filename;
int sourceline;
- struct ConfigVariable *next;
+ bool ignore;
+ bool applied;
+ struct ConfigVariable *next;
} ConfigVariable;
-extern bool ParseConfigFile(const char *config_file, const char *calling_file,
+extern 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);
extern bool ParseConfigFp(FILE *fp, const char *config_file,
int depth, int elevel,
ConfigVariable **head_p, ConfigVariable **tail_p);
+extern bool ParseConfigDirectory(const char *includedir,
+ const char *calling_file, int calling_lineno,
+ int depth, int elevel,
+ ConfigVariable **head_p,
+ ConfigVariable **tail_p);
extern void FreeConfigVariables(ConfigVariable *list);
/*
- * Enum values are made up of an array of name-value pairs
+ * The possible values of an enum variable are specified by an array of
+ * name-value pairs. The "hidden" flag means the value is accepted but
+ * won't be displayed when guc.c is asked for a list of acceptable values.
*/
struct config_enum_entry
{
bool hidden;
};
-
-typedef const char *(*GucStringAssignHook) (const char *newval, bool doit, GucSource source);
-typedef bool (*GucBoolAssignHook) (bool newval, bool doit, GucSource source);
-typedef bool (*GucIntAssignHook) (int newval, bool doit, GucSource source);
-typedef bool (*GucRealAssignHook) (double newval, bool doit, GucSource source);
-typedef bool (*GucEnumAssignHook) (int newval, bool doit, GucSource source);
+/*
+ * Signatures for per-variable check/assign/show hook functions
+ */
+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);
+/*
+ * Miscellaneous
+ */
typedef enum
{
/* Types of set_config_option actions */
GUC_ACTION_SET, /* regular SET command */
GUC_ACTION_LOCAL, /* SET LOCAL command */
- GUC_ACTION_SAVE /* function SET option */
+ GUC_ACTION_SAVE /* function SET option, or temp assignment */
} GucAction;
#define GUC_QUALIFIER_SEPARATOR '.'
#define GUC_CUSTOM_PLACEHOLDER 0x0080 /* placeholder for custom variable */
#define GUC_SUPERUSER_ONLY 0x0100 /* show only to superusers */
#define GUC_IS_NAME 0x0200 /* limit string to NAMEDATALEN-1 */
+#define GUC_NOT_WHILE_SEC_REST 0x0400 /* can't set if security restricted */
+#define GUC_DISALLOW_IN_AUTO_FILE 0x0800 /* can't set in
+ * PG_AUTOCONF_FILENAME */
-#define GUC_UNIT_KB 0x0400 /* value is in kilobytes */
-#define GUC_UNIT_BLOCKS 0x0800 /* value is in blocks */
-#define GUC_UNIT_XBLOCKS 0x0C00 /* value is in xlog blocks */
-#define GUC_UNIT_MEMORY 0x0C00 /* mask for KB, BLOCKS, XBLOCKS */
+#define GUC_UNIT_KB 0x1000 /* value is in kilobytes */
+#define GUC_UNIT_BLOCKS 0x2000 /* value is in blocks */
+#define GUC_UNIT_XBLOCKS 0x3000 /* value is in xlog blocks */
+#define GUC_UNIT_MB 0x4000 /* value is in megabytes */
+#define GUC_UNIT_MEMORY 0xF000 /* mask for size-related units */
-#define GUC_UNIT_MS 0x1000 /* value is in milliseconds */
-#define GUC_UNIT_S 0x2000 /* value is in seconds */
-#define GUC_UNIT_MIN 0x4000 /* value is in minutes */
-#define GUC_UNIT_TIME 0x7000 /* mask for MS, S, MIN */
+#define GUC_UNIT_MS 0x10000 /* value is in milliseconds */
+#define GUC_UNIT_S 0x20000 /* value is in seconds */
+#define GUC_UNIT_MIN 0x30000 /* value is in minutes */
+#define GUC_UNIT_TIME 0xF0000 /* mask for time-related units */
+
+#define GUC_UNIT (GUC_UNIT_MEMORY | GUC_UNIT_TIME)
-#define GUC_NOT_WHILE_SEC_REST 0x8000 /* can't set if security restricted */
/* GUC vars that are actually declared in guc.c, rather than elsewhere */
extern bool log_duration;
extern PGDLLIMPORT bool check_function_bodies;
extern bool default_with_oids;
-extern bool SQL_inheritance;
extern int log_min_error_statement;
extern int log_min_messages;
extern int log_min_duration_statement;
extern int log_temp_files;
+extern int temp_file_limit;
+
extern int num_temp_buffers;
-extern char *data_directory;
+extern char *cluster_name;
extern char *ConfigFileName;
extern char *HbaFileName;
extern char *IdentFileName;
extern char *external_pid_file;
-extern char *XactIsoLevel_string;
extern char *application_name;
extern int tcp_keepalives_interval;
extern int tcp_keepalives_count;
+#ifdef TRACE_SORT
+extern bool trace_sort;
+#endif
+
+/*
+ * Functions exported by guc.c
+ */
extern void SetConfigOption(const char *name, const char *value,
GucContext context, GucSource source);
bool bootValue,
GucContext context,
int flags,
+ GucBoolCheckHook check_hook,
GucBoolAssignHook assign_hook,
GucShowHook show_hook);
int maxValue,
GucContext context,
int flags,
+ GucIntCheckHook check_hook,
GucIntAssignHook assign_hook,
GucShowHook show_hook);
double maxValue,
GucContext context,
int flags,
+ GucRealCheckHook check_hook,
GucRealAssignHook assign_hook,
GucShowHook show_hook);
const char *bootValue,
GucContext context,
int flags,
+ GucStringCheckHook check_hook,
GucStringAssignHook assign_hook,
GucShowHook show_hook);
const char *long_desc,
int *valueAddr,
int bootValue,
- const struct config_enum_entry * options,
+ const struct config_enum_entry *options,
GucContext context,
int flags,
+ GucEnumCheckHook check_hook,
GucEnumAssignHook assign_hook,
GucShowHook show_hook);
extern void EmitWarningsOnPlaceholders(const char *className);
-extern const char *GetConfigOption(const char *name, bool restrict_superuser);
+extern const char *GetConfigOption(const char *name, bool missing_ok,
+ bool restrict_superuser);
extern const char *GetConfigOptionResetString(const char *name);
extern void ProcessConfigFile(GucContext context);
extern void InitializeGUCOptions(void);
extern bool parse_int(const char *value, int *result, int flags,
const char **hintmsg);
extern bool parse_real(const char *value, double *result);
-extern bool set_config_option(const char *name, const char *value,
+extern int set_config_option(const char *name, const char *value,
GucContext context, GucSource source,
- GucAction action, bool changeVal);
-extern char *GetConfigOptionByName(const char *name, const char **varname);
+ GucAction action, bool changeVal, int elevel,
+ bool is_reload);
+extern void AlterSystemSetConfigFile(AlterSystemStmt *setstmt);
+extern char *GetConfigOptionByName(const char *name, const char **varname,
+ bool missing_ok);
extern void GetConfigOptionByNum(int varnum, const char **values, bool *noshow);
extern int GetNumConfigOptions(void);
extern void GetPGVariable(const char *name, DestReceiver *dest);
extern TupleDesc GetPGVariableResultDesc(const char *name);
-extern void ExecSetVariableStmt(VariableSetStmt *stmt);
+extern void ExecSetVariableStmt(VariableSetStmt *stmt, bool isTopLevel);
extern char *ExtractSetVariableArgs(VariableSetStmt *stmt);
extern void ProcessGUCArray(ArrayType *array,
extern ArrayType *GUCArrayDelete(ArrayType *array, const char *name);
extern ArrayType *GUCArrayReset(ArrayType *array);
-extern int GUC_complaint_elevel(GucSource source);
-
-extern void pg_timezone_abbrev_initialize(void);
-
#ifdef EXEC_BACKEND
extern void write_nondefault_variables(GucContext context);
extern void read_nondefault_variables(void);
#endif
+/* GUC serialization */
+extern Size EstimateGUCStateSpace(void);
+extern void SerializeGUCState(Size maxsize, char *start_address);
+extern void RestoreGUCState(void *gucstate);
+
+/* Support for messages reported from GUC check hooks */
+
+extern PGDLLIMPORT char *GUC_check_errmsg_string;
+extern PGDLLIMPORT char *GUC_check_errdetail_string;
+extern PGDLLIMPORT char *GUC_check_errhint_string;
+
+extern void GUC_check_errcode(int sqlerrcode);
+
+#define GUC_check_errmsg \
+ pre_format_elog_string(errno, TEXTDOMAIN), \
+ GUC_check_errmsg_string = format_elog_string
+
+#define GUC_check_errdetail \
+ pre_format_elog_string(errno, TEXTDOMAIN), \
+ GUC_check_errdetail_string = format_elog_string
+
+#define GUC_check_errhint \
+ pre_format_elog_string(errno, TEXTDOMAIN), \
+ GUC_check_errhint_string = format_elog_string
+
+
/*
* The following functions are not in guc.c, but are declared here to avoid
* having to include guc.h in some widely used headers that it really doesn't
*/
/* in commands/tablespace.c */
-extern const char *assign_default_tablespace(const char *newval,
- bool doit, GucSource source);
-extern const char *assign_temp_tablespaces(const char *newval,
- bool doit, GucSource source);
+extern bool check_default_tablespace(char **newval, void **extra, GucSource source);
+extern bool check_temp_tablespaces(char **newval, void **extra, GucSource source);
+extern void assign_temp_tablespaces(const char *newval, void *extra);
/* in catalog/namespace.c */
-extern const char *assign_search_path(const char *newval,
- bool doit, GucSource source);
+extern bool check_search_path(char **newval, void **extra, GucSource source);
+extern void assign_search_path(const char *newval, void *extra);
/* in access/transam/xlog.c */
-extern bool assign_xlog_sync_method(int newval,
- bool doit, GucSource source);
+extern bool check_wal_buffers(int *newval, void **extra, GucSource source);
+extern void assign_xlog_sync_method(int new_sync_method, void *extra);
-#endif /* GUC_H */
+#endif /* GUC_H */
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