* miscinit.c
* miscellaneous initialization support stuff
*
- * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/utils/init/miscinit.c,v 1.88 2002/05/03 20:43:30 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/init/miscinit.c,v 1.158 2006/08/16 04:32:48 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include <sys/param.h>
-#include <sys/types.h>
#include <signal.h>
-#include <sys/stat.h>
#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/time.h>
#include <fcntl.h>
#include <unistd.h>
#include <grp.h>
#include <pwd.h>
-#include <stdlib.h>
-#include <errno.h>
#include <netinet/in.h>
#include <arpa/inet.h>
+#ifdef HAVE_UTIME_H
+#include <utime.h>
+#endif
-#include "catalog/catname.h"
-#include "catalog/pg_shadow.h"
-#include "libpq/libpq-be.h"
+#include "catalog/pg_authid.h"
#include "miscadmin.h"
+#include "postmaster/autovacuum.h"
+#include "storage/fd.h"
+#include "storage/ipc.h"
+#include "storage/pg_shmem.h"
+#include "storage/proc.h"
+#include "storage/procarray.h"
#include "utils/builtins.h"
#include "utils/guc.h"
-#include "utils/lsyscache.h"
#include "utils/syscache.h"
+#define DIRECTORY_LOCK_FILE "postmaster.pid"
+
ProcessingMode Mode = InitProcessing;
-/* Note: we rely on these to initialize as zeroes */
-static char directoryLockFile[MAXPGPATH];
+/* Note: we rely on this to initialize as zeroes */
static char socketLockFile[MAXPGPATH];
-#ifdef CYR_RECODE
-static unsigned char RecodeForwTable[128];
-static unsigned char RecodeBackTable[128];
-static void GetCharSetByHost(char *TableName, int host, const char *DataDir);
-#endif
+/* ----------------------------------------------------------------
+ * ignoring system indexes support stuff
+ *
+ * NOTE: "ignoring system indexes" means we do not use the system indexes
+ * for lookups (either in hardwired catalog accesses or in planner-generated
+ * plans). We do, however, still update the indexes when a catalog
+ * modification is made.
+ * ----------------------------------------------------------------
+ */
+bool IgnoreSystemIndexes = false;
/* ----------------------------------------------------------------
- * ignoring system indexes support stuff
+ * system index reindexing support
+ *
+ * When we are busy reindexing a system index, this code provides support
+ * for preventing catalog lookups from using that index.
* ----------------------------------------------------------------
*/
-static bool isIgnoringSystemIndexes = false;
+static Oid currentlyReindexedHeap = InvalidOid;
+static Oid currentlyReindexedIndex = InvalidOid;
/*
- * IsIgnoringSystemIndexes
- * True if ignoring system indexes.
+ * ReindexIsProcessingHeap
+ * True if heap specified by OID is currently being reindexed.
*/
bool
-IsIgnoringSystemIndexes()
+ReindexIsProcessingHeap(Oid heapOid)
{
- return isIgnoringSystemIndexes;
+ return heapOid == currentlyReindexedHeap;
}
/*
- * IgnoreSystemIndexes
- * Set true or false whether PostgreSQL ignores system indexes.
- *
+ * ReindexIsProcessingIndex
+ * True if index specified by OID is currently being reindexed.
+ */
+bool
+ReindexIsProcessingIndex(Oid indexOid)
+{
+ return indexOid == currentlyReindexedIndex;
+}
+
+/*
+ * SetReindexProcessing
+ * Set flag that specified heap/index are being reindexed.
*/
void
-IgnoreSystemIndexes(bool mode)
+SetReindexProcessing(Oid heapOid, Oid indexOid)
{
- isIgnoringSystemIndexes = mode;
+ Assert(OidIsValid(heapOid) && OidIsValid(indexOid));
+ /* Reindexing is not re-entrant. */
+ if (OidIsValid(currentlyReindexedIndex))
+ elog(ERROR, "cannot reindex while reindexing");
+ currentlyReindexedHeap = heapOid;
+ currentlyReindexedIndex = indexOid;
+}
+
+/*
+ * ResetReindexProcessing
+ * Unset reindexing status.
+ */
+void
+ResetReindexProcessing(void)
+{
+ currentlyReindexedHeap = InvalidOid;
+ currentlyReindexedIndex = InvalidOid;
}
/* ----------------------------------------------------------------
}
}
-void
-SetDatabaseName(const char *name)
-{
- if (DatabaseName)
- {
- free(DatabaseName);
- DatabaseName = NULL;
- }
- /* use strdup since this is done before memory contexts are set up */
- if (name)
- {
- DatabaseName = strdup(name);
- AssertState(DatabaseName);
- }
-}
-
/*
* Set data directory, but make sure it's an absolute path. Use this,
* never set DataDir directly.
SetDataDir(const char *dir)
{
char *new;
- int newlen;
AssertArg(dir);
/* If presented path is relative, convert to absolute */
- if (dir[0] != '/')
+ new = make_absolute_path(dir);
+
+ if (DataDir)
+ free(DataDir);
+ DataDir = new;
+}
+
+/*
+ * Change working directory to DataDir. Most of the postmaster and backend
+ * code assumes that we are in DataDir so it can use relative paths to access
+ * stuff in and under the data directory. For convenience during path
+ * setup, however, we don't force the chdir to occur during SetDataDir.
+ */
+void
+ChangeToDataDir(void)
+{
+ AssertState(DataDir);
+
+ if (chdir(DataDir) < 0)
+ ereport(FATAL,
+ (errcode_for_file_access(),
+ errmsg("could not change directory to \"%s\": %m",
+ DataDir)));
+}
+
+/*
+ * If the given pathname isn't already absolute, make it so, interpreting
+ * it relative to the current working directory.
+ *
+ * Also canonicalizes the path. The result is always a malloc'd copy.
+ *
+ * Note: interpretation of relative-path arguments during postmaster startup
+ * should happen before doing ChangeToDataDir(), else the user will probably
+ * not like the results.
+ */
+char *
+make_absolute_path(const char *path)
+{
+ char *new;
+
+ /* Returning null for null input is convenient for some callers */
+ if (path == NULL)
+ return NULL;
+
+ if (!is_absolute_path(path))
{
char *buf;
size_t buflen;
{
buf = malloc(buflen);
if (!buf)
- elog(FATAL, "out of memory");
+ ereport(FATAL,
+ (errcode(ERRCODE_OUT_OF_MEMORY),
+ errmsg("out of memory")));
if (getcwd(buf, buflen))
break;
else
{
free(buf);
- elog(FATAL, "cannot get current working directory: %m");
+ elog(FATAL, "could not get current working directory: %m");
}
}
- new = malloc(strlen(buf) + 1 + strlen(dir) + 1);
+ new = malloc(strlen(buf) + strlen(path) + 2);
if (!new)
- elog(FATAL, "out of memory");
- sprintf(new, "%s/%s", buf, dir);
+ ereport(FATAL,
+ (errcode(ERRCODE_OUT_OF_MEMORY),
+ errmsg("out of memory")));
+ sprintf(new, "%s/%s", buf, path);
free(buf);
}
else
{
- new = strdup(dir);
+ new = strdup(path);
if (!new)
- elog(FATAL, "out of memory");
+ ereport(FATAL,
+ (errcode(ERRCODE_OUT_OF_MEMORY),
+ errmsg("out of memory")));
}
- /*
- * Strip any trailing slash. Not strictly necessary, but avoids
- * generating funny-looking paths to individual files.
- */
- newlen = strlen(new);
- if (newlen > 1 && new[newlen-1] == '/')
- new[newlen-1] = '\0';
+ /* Make sure punctuation is canonical, too */
+ canonicalize_path(new);
- if (DataDir)
- free(DataDir);
- DataDir = new;
+ return new;
}
/* ----------------------------------------------------------------
- * MULTIBYTE stub code
+ * User ID state
+ *
+ * We have to track several different values associated with the concept
+ * of "user ID".
*
- * Even if MULTIBYTE is not enabled, these functions are necessary
- * since pg_proc.h has references to them.
+ * AuthenticatedUserId is determined at connection start and never changes.
+ *
+ * SessionUserId is initially the same as AuthenticatedUserId, but can be
+ * changed by SET SESSION AUTHORIZATION (if AuthenticatedUserIsSuperuser).
+ * This is the ID reported by the SESSION_USER SQL function.
+ *
+ * OuterUserId is the current user ID in effect at the "outer level" (outside
+ * any transaction or function). This is initially the same as SessionUserId,
+ * but can be changed by SET ROLE to any role that SessionUserId is a
+ * member of. We store this mainly so that AtAbort_UserId knows what to
+ * reset CurrentUserId to.
+ *
+ * CurrentUserId is the current effective user ID; this is the one to use
+ * for all normal permissions-checking purposes. At outer level this will
+ * be the same as OuterUserId, but it changes during calls to SECURITY
+ * DEFINER functions, as well as locally in some specialized commands.
* ----------------------------------------------------------------
*/
+static Oid AuthenticatedUserId = InvalidOid;
+static Oid SessionUserId = InvalidOid;
+static Oid OuterUserId = InvalidOid;
+static Oid CurrentUserId = InvalidOid;
-#ifndef MULTIBYTE
-
-Datum
-getdatabaseencoding(PG_FUNCTION_ARGS)
-{
- return DirectFunctionCall1(namein, CStringGetDatum("SQL_ASCII"));
-}
-
-Datum
-pg_client_encoding(PG_FUNCTION_ARGS)
-{
- return DirectFunctionCall1(namein, CStringGetDatum("SQL_ASCII"));
-}
-
-Datum
-PG_encoding_to_char(PG_FUNCTION_ARGS)
-{
- return DirectFunctionCall1(namein, CStringGetDatum("SQL_ASCII"));
-}
-
-Datum
-PG_char_to_encoding(PG_FUNCTION_ARGS)
-{
- PG_RETURN_INT32(0);
-}
+/* We also have to remember the superuser state of some of these levels */
+static bool AuthenticatedUserIsSuperuser = false;
+static bool SessionUserIsSuperuser = false;
-Datum
-pg_convert(PG_FUNCTION_ARGS)
-{
- elog(ERROR, "convert is not supported. To use convert, you need to enable multibyte capability");
- return DirectFunctionCall1(textin, CStringGetDatum(""));
-}
+/* We also remember if a SET ROLE is currently active */
+static bool SetRoleIsActive = false;
-Datum
-pg_convert2(PG_FUNCTION_ARGS)
-{
- elog(ERROR, "convert is not supported. To use convert, you need to enable multibyte capability");
- return DirectFunctionCall1(textin, CStringGetDatum(""));
-}
-#endif
-/* ----------------------------------------------------------------
- * CYR_RECODE support
- * ----------------------------------------------------------------
+/*
+ * GetUserId/SetUserId - get/set the current effective user ID.
*/
-
-#ifdef CYR_RECODE
-
-void
-SetCharSet(void)
-{
- FILE *file;
- char *filename;
- char *map_file;
- char buf[MAX_TOKEN];
- int i;
- unsigned char FromChar,
- ToChar;
- char ChTable[MAX_TOKEN];
-
- for (i = 0; i < 128; i++)
- {
- RecodeForwTable[i] = i + 128;
- RecodeBackTable[i] = i + 128;
- }
-
- if (IsUnderPostmaster)
- {
- GetCharSetByHost(ChTable, MyProcPort->raddr.in.sin_addr.s_addr, DataDir);
- filename = ChTable;
- }
- else
- filename = getenv("PG_RECODETABLE");
-
- if (filename && *filename != '\0')
- {
- map_file = palloc(strlen(DataDir) + strlen(filename) + 2);
- sprintf(map_file, "%s/%s", DataDir, filename);
- file = AllocateFile(map_file, "r");
- pfree(map_file);
- if (file == NULL)
- return;
-
- while (!feof(file))
- {
- next_token(file, buf, sizeof(buf));
- if (buf[0] != '\0')
- {
- FromChar = strtoul(buf, 0, 0);
- /* Read the ToChar */
- next_token(file, buf, sizeof(buf));
- if (buf[0] != '\0')
- {
- ToChar = strtoul(buf, 0, 0);
- RecodeForwTable[FromChar - 128] = ToChar;
- RecodeBackTable[ToChar - 128] = FromChar;
-
- /* read to EOL */
- while (!feof(file) && buf[0])
- {
- next_token(file, buf, sizeof(buf));
- elog(LOG, "SetCharSet: unknown tag %s in file %s",
- buf, filename);
- }
- }
- }
- }
- FreeFile(file);
- }
-}
-
-
-char *
-convertstr(unsigned char *buff, int len, int dest)
-{
- int i;
- char *ch = buff;
-
- for (i = 0; i < len; i++, buff++)
- {
- if (*buff > 127)
- {
- if (dest)
- *buff = RecodeForwTable[*buff - 128];
- else
- *buff = RecodeBackTable[*buff - 128];
- }
- }
- return ch;
-}
-
-#define CHARSET_FILE "charset.conf"
-#define MAX_CHARSETS 10
-#define KEY_HOST 1
-#define KEY_BASE 2
-#define KEY_TABLE 3
-
-struct CharsetItem
-{
- char Orig[MAX_TOKEN];
- char Dest[MAX_TOKEN];
- char Table[MAX_TOKEN];
-};
-
-
-static bool
-CharSetInRange(char *buf, int host)
+Oid
+GetUserId(void)
{
- int valid,
- i,
- FromAddr,
- ToAddr,
- tmp;
- struct in_addr file_ip_addr;
- char *p;
- unsigned int one = 0x80000000,
- NetMask = 0;
- unsigned char mask;
-
- p = strchr(buf, '/');
- if (p)
- {
- *p++ = '\0';
- valid = inet_aton(buf, &file_ip_addr);
- if (valid)
- {
- mask = strtoul(p, 0, 0);
- FromAddr = ntohl(file_ip_addr.s_addr);
- ToAddr = ntohl(file_ip_addr.s_addr);
- for (i = 0; i < mask; i++)
- {
- NetMask |= one;
- one >>= 1;
- }
- FromAddr &= NetMask;
- ToAddr = ToAddr | ~NetMask;
- tmp = ntohl(host);
- return ((unsigned) tmp >= (unsigned) FromAddr &&
- (unsigned) tmp <= (unsigned) ToAddr);
- }
- }
- else
- {
- p = strchr(buf, '-');
- if (p)
- {
- *p++ = '\0';
- valid = inet_aton(buf, &file_ip_addr);
- if (valid)
- {
- FromAddr = ntohl(file_ip_addr.s_addr);
- valid = inet_aton(p, &file_ip_addr);
- if (valid)
- {
- ToAddr = ntohl(file_ip_addr.s_addr);
- tmp = ntohl(host);
- return ((unsigned) tmp >= (unsigned) FromAddr &&
- (unsigned) tmp <= (unsigned) ToAddr);
- }
- }
- }
- else
- {
- valid = inet_aton(buf, &file_ip_addr);
- if (valid)
- {
- FromAddr = file_ip_addr.s_addr;
- return (unsigned) FromAddr == (unsigned) host;
- }
- }
- }
- return false;
+ AssertState(OidIsValid(CurrentUserId));
+ return CurrentUserId;
}
-static void
-GetCharSetByHost(char *TableName, int host, const char *DataDir)
+void
+SetUserId(Oid userid)
{
- FILE *file;
- char buf[MAX_TOKEN],
- BaseCharset[MAX_TOKEN],
- OrigCharset[MAX_TOKEN],
- DestCharset[MAX_TOKEN],
- HostCharset[MAX_TOKEN],
- *map_file;
- int key,
- ChIndex = 0,
- i,
- bufsize;
- struct CharsetItem *ChArray[MAX_CHARSETS];
-
- *TableName = '\0';
- bufsize = (strlen(DataDir) + strlen(CHARSET_FILE) + 2) * sizeof(char);
- map_file = (char *) palloc(bufsize);
- snprintf(map_file, bufsize, "%s/%s", DataDir, CHARSET_FILE);
- file = AllocateFile(map_file, "r");
- pfree(map_file);
- if (file == NULL)
- {
- /* XXX should we log a complaint? */
- return;
- }
-
- while (!feof(file))
- {
- next_token(file, buf, sizeof(buf));
- if (buf[0] != '\0')
- {
- key = 0;
- if (strcasecmp(buf, "HostCharset") == 0)
- key = KEY_HOST;
- else if (strcasecmp(buf, "BaseCharset") == 0)
- key = KEY_BASE;
- else if (strcasecmp(buf, "RecodeTable") == 0)
- key = KEY_TABLE;
- else
- elog(LOG, "GetCharSetByHost: unknown tag %s in file %s",
- buf, CHARSET_FILE);
-
- switch (key)
- {
- case KEY_HOST:
- /* Read the host */
- next_token(file, buf, sizeof(buf));
- if (buf[0] != '\0')
- {
- if (CharSetInRange(buf, host))
- {
- /* Read the charset */
- next_token(file, buf, sizeof(buf));
- if (buf[0] != '\0')
- strcpy(HostCharset, buf);
- }
- }
- break;
- case KEY_BASE:
- /* Read the base charset */
- next_token(file, buf, sizeof(buf));
- if (buf[0] != '\0')
- strcpy(BaseCharset, buf);
- break;
- case KEY_TABLE:
- /* Read the original charset */
- next_token(file, buf, sizeof(buf));
- if (buf[0] != '\0')
- {
- strcpy(OrigCharset, buf);
- /* Read the destination charset */
- next_token(file, buf, sizeof(buf));
- if (buf[0] != '\0')
- {
- strcpy(DestCharset, buf);
- /* Read the table filename */
- next_token(file, buf, sizeof(buf));
- if (buf[0] != '\0')
- {
- ChArray[ChIndex] =
- (struct CharsetItem *) palloc(sizeof(struct CharsetItem));
- strcpy(ChArray[ChIndex]->Orig, OrigCharset);
- strcpy(ChArray[ChIndex]->Dest, DestCharset);
- strcpy(ChArray[ChIndex]->Table, buf);
- ChIndex++;
- }
- }
- }
- break;
- }
-
- /* read to EOL */
- while (!feof(file) && buf[0])
- {
- next_token(file, buf, sizeof(buf));
- elog(LOG, "GetCharSetByHost: unknown tag %s in file %s",
- buf, CHARSET_FILE);
- }
- }
- }
- FreeFile(file);
-
- for (i = 0; i < ChIndex; i++)
- {
- if (strcasecmp(BaseCharset, ChArray[i]->Orig) == 0 &&
- strcasecmp(HostCharset, ChArray[i]->Dest) == 0)
- strncpy(TableName, ChArray[i]->Table, 79);
- pfree(ChArray[i]);
- }
+ AssertArg(OidIsValid(userid));
+ CurrentUserId = userid;
}
-#endif /* CYR_RECODE */
-
-
-
-/* ----------------------------------------------------------------
- * User ID things
- *
- * The session user is determined at connection start and never
- * changes. The current user may change when "setuid" functions
- * are implemented. Conceptually there is a stack, whose bottom
- * is the session user. You are yourself responsible to save and
- * restore the current user id if you need to change it.
- * ----------------------------------------------------------------
- */
-static Oid CurrentUserId = InvalidOid;
-static Oid SessionUserId = InvalidOid;
-
-static bool AuthenticatedUserIsSuperuser = false;
/*
- * This function is relevant for all privilege checks.
+ * GetOuterUserId/SetOuterUserId - get/set the outer-level user ID.
*/
Oid
-GetUserId(void)
+GetOuterUserId(void)
{
- AssertState(OidIsValid(CurrentUserId));
- return CurrentUserId;
+ AssertState(OidIsValid(OuterUserId));
+ return OuterUserId;
}
-void
-SetUserId(Oid newid)
+static void
+SetOuterUserId(Oid userid)
{
- AssertArg(OidIsValid(newid));
- CurrentUserId = newid;
+ AssertArg(OidIsValid(userid));
+ OuterUserId = userid;
+
+ /* We force the effective user ID to match, too */
+ CurrentUserId = userid;
}
/*
- * This value is only relevant for informational purposes.
+ * GetSessionUserId/SetSessionUserId - get/set the session user ID.
*/
Oid
GetSessionUserId(void)
}
-void
-SetSessionUserId(Oid newid)
+static void
+SetSessionUserId(Oid userid, bool is_superuser)
{
- AssertArg(OidIsValid(newid));
- SessionUserId = newid;
- /* Current user defaults to session user. */
- if (!OidIsValid(CurrentUserId))
- CurrentUserId = newid;
+ AssertArg(OidIsValid(userid));
+ SessionUserId = userid;
+ SessionUserIsSuperuser = is_superuser;
+ SetRoleIsActive = false;
+
+ /* We force the effective user IDs to match, too */
+ OuterUserId = userid;
+ CurrentUserId = userid;
}
+/*
+ * Initialize user identity during normal backend startup
+ */
void
-InitializeSessionUserId(const char *username)
+InitializeSessionUserId(const char *rolename)
{
- HeapTuple userTup;
+ HeapTuple roleTup;
+ Form_pg_authid rform;
Datum datum;
bool isnull;
+ Oid roleid;
/*
* Don't do scans if we're bootstrapping, none of the system catalogs
AssertState(!IsBootstrapProcessingMode());
/* call only once */
- AssertState(!OidIsValid(SessionUserId));
+ AssertState(!OidIsValid(AuthenticatedUserId));
- userTup = SearchSysCache(SHADOWNAME,
- PointerGetDatum(username),
+ roleTup = SearchSysCache(AUTHNAME,
+ PointerGetDatum(rolename),
0, 0, 0);
- if (!HeapTupleIsValid(userTup))
- elog(FATAL, "user \"%s\" does not exist", username);
+ if (!HeapTupleIsValid(roleTup))
+ ereport(FATAL,
+ (errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION),
+ errmsg("role \"%s\" does not exist", rolename)));
+
+ rform = (Form_pg_authid) GETSTRUCT(roleTup);
+ roleid = HeapTupleGetOid(roleTup);
- SetSessionUserId(((Form_pg_shadow) GETSTRUCT(userTup))->usesysid);
+ AuthenticatedUserId = roleid;
+ AuthenticatedUserIsSuperuser = rform->rolsuper;
+
+ /* This sets OuterUserId/CurrentUserId too */
+ SetSessionUserId(roleid, AuthenticatedUserIsSuperuser);
+
+ /* Also mark our PGPROC entry with the authenticated user id */
+ /* (We assume this is an atomic store so no lock is needed) */
+ MyProc->roleId = roleid;
+
+ /*
+ * These next checks are not enforced when in standalone mode, so that
+ * there is a way to recover from sillinesses like "UPDATE pg_authid SET
+ * rolcanlogin = false;".
+ *
+ * We do not enforce them for the autovacuum process either.
+ */
+ if (IsUnderPostmaster && !IsAutoVacuumProcess())
+ {
+ /*
+ * Is role allowed to login at all?
+ */
+ if (!rform->rolcanlogin)
+ ereport(FATAL,
+ (errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION),
+ errmsg("role \"%s\" is not permitted to log in",
+ rolename)));
+
+ /*
+ * Check connection limit for this role.
+ *
+ * There is a race condition here --- we create our PGPROC before
+ * checking for other PGPROCs. If two backends did this at about the
+ * same time, they might both think they were over the limit, while
+ * ideally one should succeed and one fail. Getting that to work
+ * exactly seems more trouble than it is worth, however; instead we
+ * just document that the connection limit is approximate.
+ */
+ if (rform->rolconnlimit >= 0 &&
+ !AuthenticatedUserIsSuperuser &&
+ CountUserBackends(roleid) > rform->rolconnlimit)
+ ereport(FATAL,
+ (errcode(ERRCODE_TOO_MANY_CONNECTIONS),
+ errmsg("too many connections for role \"%s\"",
+ rolename)));
+ }
- AuthenticatedUserIsSuperuser = ((Form_pg_shadow) GETSTRUCT(userTup))->usesuper;
+ /* Record username and superuser status as GUC settings too */
+ SetConfigOption("session_authorization", rolename,
+ PGC_BACKEND, PGC_S_OVERRIDE);
+ SetConfigOption("is_superuser",
+ AuthenticatedUserIsSuperuser ? "on" : "off",
+ PGC_INTERNAL, PGC_S_OVERRIDE);
/*
- * Set up user-specific configuration variables. This is a good
- * place to do it so we don't have to read pg_shadow twice during
- * session startup.
+ * Set up user-specific configuration variables. This is a good place to
+ * do it so we don't have to read pg_authid twice during session startup.
*/
- datum = SysCacheGetAttr(SHADOWNAME, userTup,
- Anum_pg_shadow_useconfig, &isnull);
+ datum = SysCacheGetAttr(AUTHNAME, roleTup,
+ Anum_pg_authid_rolconfig, &isnull);
if (!isnull)
{
- ArrayType *a = DatumGetArrayTypeP(datum);
+ ArrayType *a = DatumGetArrayTypeP(datum);
ProcessGUCArray(a, PGC_S_USER);
}
- ReleaseSysCache(userTup);
+ ReleaseSysCache(roleTup);
}
+/*
+ * Initialize user identity during special backend startup
+ */
void
InitializeSessionUserIdStandalone(void)
{
/* This function should only be called in a single-user backend. */
- AssertState(!IsUnderPostmaster);
+ AssertState(!IsUnderPostmaster || IsAutoVacuumProcess());
/* call only once */
- AssertState(!OidIsValid(SessionUserId));
+ AssertState(!OidIsValid(AuthenticatedUserId));
- SetSessionUserId(BOOTSTRAP_USESYSID);
+ AuthenticatedUserId = BOOTSTRAP_SUPERUSERID;
AuthenticatedUserIsSuperuser = true;
+
+ SetSessionUserId(BOOTSTRAP_SUPERUSERID, true);
+}
+
+
+/*
+ * Reset effective userid during AbortTransaction
+ *
+ * This is essentially SetUserId(GetOuterUserId()), but without the Asserts.
+ * The reason is that if a backend's InitPostgres transaction fails (eg,
+ * because an invalid user name was given), we have to be able to get through
+ * AbortTransaction without asserting.
+ */
+void
+AtAbort_UserId(void)
+{
+ CurrentUserId = OuterUserId;
}
/*
* Change session auth ID while running
+ *
+ * Only a superuser may set auth ID to something other than himself. Note
+ * that in case of multiple SETs in a single session, the original userid's
+ * superuserness is what matters. But we set the GUC variable is_superuser
+ * to indicate whether the *current* session userid is a superuser.
+ *
+ * Note: this is not an especially clean place to do the permission check.
+ * It's OK because the check does not require catalog access and can't
+ * fail during an end-of-transaction GUC reversion, but we may someday
+ * have to push it up into assign_session_authorization.
*/
void
-SetSessionAuthorization(const char *username)
+SetSessionAuthorization(Oid userid, bool is_superuser)
{
- int32 userid;
+ /* Must have authenticated already, else can't make permission check */
+ AssertState(OidIsValid(AuthenticatedUserId));
- if (!AuthenticatedUserIsSuperuser)
- elog(ERROR, "permission denied");
+ if (userid != AuthenticatedUserId &&
+ !AuthenticatedUserIsSuperuser)
+ ereport(ERROR,
+ (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+ errmsg("permission denied to set session authorization")));
+
+ SetSessionUserId(userid, is_superuser);
+
+ SetConfigOption("is_superuser",
+ is_superuser ? "on" : "off",
+ PGC_INTERNAL, PGC_S_OVERRIDE);
+}
+
+/*
+ * Report current role id
+ * This follows the semantics of SET ROLE, ie return the outer-level ID
+ * not the current effective ID, and return InvalidOid when the setting
+ * is logically SET ROLE NONE.
+ */
+Oid
+GetCurrentRoleId(void)
+{
+ if (SetRoleIsActive)
+ return OuterUserId;
+ else
+ return InvalidOid;
+}
+
+/*
+ * Change Role ID while running (SET ROLE)
+ *
+ * If roleid is InvalidOid, we are doing SET ROLE NONE: revert to the
+ * session user authorization. In this case the is_superuser argument
+ * is ignored.
+ *
+ * When roleid is not InvalidOid, the caller must have checked whether
+ * the session user has permission to become that role. (We cannot check
+ * here because this routine must be able to execute in a failed transaction
+ * to restore a prior value of the ROLE GUC variable.)
+ */
+void
+SetCurrentRoleId(Oid roleid, bool is_superuser)
+{
+ /*
+ * Get correct info if it's SET ROLE NONE
+ *
+ * If SessionUserId hasn't been set yet, just do nothing --- the eventual
+ * SetSessionUserId call will fix everything. This is needed since we
+ * will get called during GUC initialization.
+ */
+ if (!OidIsValid(roleid))
+ {
+ if (!OidIsValid(SessionUserId))
+ return;
+
+ roleid = SessionUserId;
+ is_superuser = SessionUserIsSuperuser;
+
+ SetRoleIsActive = false;
+ }
+ else
+ SetRoleIsActive = true;
- userid = get_usesysid(username);
+ SetOuterUserId(roleid);
- SetSessionUserId(userid);
- SetUserId(userid);
+ SetConfigOption("is_superuser",
+ is_superuser ? "on" : "off",
+ PGC_INTERNAL, PGC_S_OVERRIDE);
}
/*
- * Get user name from user id
+ * Get user name from user oid
*/
char *
-GetUserName(Oid userid)
+GetUserNameFromId(Oid roleid)
{
HeapTuple tuple;
char *result;
- tuple = SearchSysCache(SHADOWSYSID,
- ObjectIdGetDatum(userid),
+ tuple = SearchSysCache(AUTHOID,
+ ObjectIdGetDatum(roleid),
0, 0, 0);
if (!HeapTupleIsValid(tuple))
- elog(ERROR, "invalid user id %u", (unsigned) userid);
+ ereport(ERROR,
+ (errcode(ERRCODE_UNDEFINED_OBJECT),
+ errmsg("invalid role OID: %u", roleid)));
- result = pstrdup(NameStr(((Form_pg_shadow) GETSTRUCT(tuple))->usename));
+ result = pstrdup(NameStr(((Form_pg_authid) GETSTRUCT(tuple))->rolname));
ReleaseSysCache(tuple);
return result;
}
-
/*-------------------------------------------------------------------------
* Interlock-file support
*
static void
UnlinkLockFile(int status, Datum filename)
{
- unlink((char *) DatumGetPointer(filename));
- /* Should we complain if the unlink fails? */
+ char *fname = (char *) DatumGetPointer(filename);
+
+ if (fname != NULL)
+ {
+ if (unlink(fname) != 0)
+ {
+ /* Should we complain if the unlink fails? */
+ }
+ free(fname);
+ }
}
/*
- * Create a lockfile, if possible
- *
- * Call CreateLockFile with the name of the lockfile to be created.
- * Returns true if successful, false if not (with a message on stderr).
+ * Create a lockfile.
*
+ * filename is the name of the lockfile to create.
* amPostmaster is used to determine how to encode the output PID.
* isDDLock and refName are used to determine what error message to produce.
*/
-static bool
+static void
CreateLockFile(const char *filename, bool amPostmaster,
bool isDDLock, const char *refName)
{
pid_t my_pid = getpid();
/*
- * We need a loop here because of race conditions. But don't loop
- * forever (for example, a non-writable $PGDATA directory might cause
- * a failure that won't go away). 100 tries seems like plenty.
+ * We need a loop here because of race conditions. But don't loop forever
+ * (for example, a non-writable $PGDATA directory might cause a failure
+ * that won't go away). 100 tries seems like plenty.
*/
for (ntries = 0;; ntries++)
{
/*
* Try to create the lock file --- O_EXCL makes this atomic.
+ *
+ * Think not to make the file protection weaker than 0600. See
+ * comments below.
*/
fd = open(filename, O_RDWR | O_CREAT | O_EXCL, 0600);
if (fd >= 0)
* Couldn't create the pid file. Probably it already exists.
*/
if ((errno != EEXIST && errno != EACCES) || ntries > 100)
- elog(FATAL, "Can't create lock file %s: %m", filename);
+ ereport(FATAL,
+ (errcode_for_file_access(),
+ errmsg("could not create lock file \"%s\": %m",
+ filename)));
/*
* Read the file to get the old owner's PID. Note race condition
{
if (errno == ENOENT)
continue; /* race condition; try again */
- elog(FATAL, "Can't read lock file %s: %m", filename);
+ ereport(FATAL,
+ (errcode_for_file_access(),
+ errmsg("could not open lock file \"%s\": %m",
+ filename)));
}
- if ((len = read(fd, buffer, sizeof(buffer) - 1)) <= 0)
- elog(FATAL, "Can't read lock file %s: %m", filename);
+ if ((len = read(fd, buffer, sizeof(buffer) - 1)) < 0)
+ ereport(FATAL,
+ (errcode_for_file_access(),
+ errmsg("could not read lock file \"%s\": %m",
+ filename)));
close(fd);
buffer[len] = '\0';
other_pid = (pid_t) (encoded_pid < 0 ? -encoded_pid : encoded_pid);
if (other_pid <= 0)
- elog(FATAL, "Bogus data in lock file %s", filename);
+ elog(FATAL, "bogus data in lock file \"%s\": \"%s\"",
+ filename, buffer);
/*
* Check to see if the other process still exists
*
+ * If the PID in the lockfile is our own PID or our parent's PID, then
+ * the file must be stale (probably left over from a previous system
+ * boot cycle). We need this test because of the likelihood that a
+ * reboot will assign exactly the same PID as we had in the previous
+ * reboot. Also, if there is just one more process launch in this
+ * reboot than in the previous one, the lockfile might mention our
+ * parent's PID. We can reject that since we'd never be launched
+ * directly by a competing postmaster. We can't detect grandparent
+ * processes unfortunately, but if the init script is written
+ * carefully then all but the immediate parent shell will be
+ * root-owned processes and so the kill test will fail with EPERM.
+ *
+ * We can treat the EPERM-error case as okay because that error
+ * implies that the existing process has a different userid than we
+ * do, which means it cannot be a competing postmaster. A postmaster
+ * cannot successfully attach to a data directory owned by a userid
+ * other than its own. (This is now checked directly in
+ * checkDataDir(), but has been true for a long time because of the
+ * restriction that the data directory isn't group- or
+ * world-accessible.) Also, since we create the lockfiles mode 600,
+ * we'd have failed above if the lockfile belonged to another userid
+ * --- which means that whatever process kill() is reporting about
+ * isn't the one that made the lockfile. (NOTE: this last
+ * consideration is the only one that keeps us from blowing away a
+ * Unix socket file belonging to an instance of Postgres being run by
+ * someone else, at least on machines where /tmp hasn't got a
+ * stickybit.)
+ *
+ * Windows hasn't got getppid(), but doesn't need it since it's not
+ * using real kill() either...
+ *
* Normally kill() will fail with ESRCH if the given PID doesn't
- * exist. BeOS returns EINVAL for some silly reason, however.
+ * exist.
*/
- if (other_pid != my_pid)
+ if (other_pid != my_pid
+#ifndef WIN32
+ && other_pid != getppid()
+#endif
+ )
{
if (kill(other_pid, 0) == 0 ||
- (errno != ESRCH
-#ifdef __BEOS__
- && errno != EINVAL
-#endif
- ))
+ (errno != ESRCH && errno != EPERM))
{
/* lockfile belongs to a live process */
- fprintf(stderr, "Lock file \"%s\" already exists.\n",
- filename);
- if (isDDLock)
- fprintf(stderr,
- "Is another %s (pid %d) running in \"%s\"?\n",
- (encoded_pid < 0 ? "postgres" : "postmaster"),
- (int) other_pid, refName);
- else
- fprintf(stderr,
- "Is another %s (pid %d) using \"%s\"?\n",
- (encoded_pid < 0 ? "postgres" : "postmaster"),
- (int) other_pid, refName);
- return false;
+ ereport(FATAL,
+ (errcode(ERRCODE_LOCK_FILE_EXISTS),
+ errmsg("lock file \"%s\" already exists",
+ filename),
+ isDDLock ?
+ (encoded_pid < 0 ?
+ errhint("Is another postgres (PID %d) running in data directory \"%s\"?",
+ (int) other_pid, refName) :
+ errhint("Is another postmaster (PID %d) running in data directory \"%s\"?",
+ (int) other_pid, refName)) :
+ (encoded_pid < 0 ?
+ errhint("Is another postgres (PID %d) using socket file \"%s\"?",
+ (int) other_pid, refName) :
+ errhint("Is another postmaster (PID %d) using socket file \"%s\"?",
+ (int) other_pid, refName))));
}
}
/*
- * No, the creating process did not exist. However, it could be
- * that the postmaster crashed (or more likely was kill -9'd by a
- * clueless admin) but has left orphan backends behind. Check for
- * this by looking to see if there is an associated shmem segment
- * that is still in use.
+ * No, the creating process did not exist. However, it could be that
+ * the postmaster crashed (or more likely was kill -9'd by a clueless
+ * admin) but has left orphan backends behind. Check for this by
+ * looking to see if there is an associated shmem segment that is
+ * still in use.
*/
if (isDDLock)
{
char *ptr;
- unsigned long shmKey,
- shmId;
+ unsigned long id1,
+ id2;
ptr = strchr(buffer, '\n');
if (ptr != NULL &&
(ptr = strchr(ptr + 1, '\n')) != NULL)
{
ptr++;
- if (sscanf(ptr, "%lu %lu", &shmKey, &shmId) == 2)
+ if (sscanf(ptr, "%lu %lu", &id1, &id2) == 2)
{
- if (SharedMemoryIsInUse((IpcMemoryKey) shmKey,
- (IpcMemoryId) shmId))
- {
- fprintf(stderr,
- "Found a pre-existing shared memory block (ID %d) still in use.\n"
- "If you're sure there are no old backends still running,\n"
- "remove the shared memory block with ipcrm(1), or just\n"
- "delete \"%s\".\n",
- (int) shmId, filename);
- return false;
- }
+ if (PGSharedMemoryIsInUse(id1, id2))
+ ereport(FATAL,
+ (errcode(ERRCODE_LOCK_FILE_EXISTS),
+ errmsg("pre-existing shared memory block "
+ "(key %lu, ID %lu) is still in use",
+ id1, id2),
+ errhint("If you're sure there are no old "
+ "server processes still running, remove "
+ "the shared memory block with "
+ "the command \"ipcclean\", \"ipcrm\", "
+ "or just delete the file \"%s\".",
+ filename)));
}
}
}
/*
- * Looks like nobody's home. Unlink the file and try again to
- * create it. Need a loop because of possible race condition
- * against other would-be creators.
+ * Looks like nobody's home. Unlink the file and try again to create
+ * it. Need a loop because of possible race condition against other
+ * would-be creators.
*/
if (unlink(filename) < 0)
- elog(FATAL, "Can't remove old lock file %s: %m"
- "\n\tThe file seems accidentally left, but I couldn't remove it."
- "\n\tPlease remove the file by hand and try again.",
- filename);
+ ereport(FATAL,
+ (errcode_for_file_access(),
+ errmsg("could not remove old lock file \"%s\": %m",
+ filename),
+ errhint("The file seems accidentally left over, but "
+ "it could not be removed. Please remove the file "
+ "by hand and try again.")));
}
/*
unlink(filename);
/* if write didn't set errno, assume problem is no disk space */
errno = save_errno ? save_errno : ENOSPC;
- elog(FATAL, "Can't write lock file %s: %m", filename);
+ ereport(FATAL,
+ (errcode_for_file_access(),
+ errmsg("could not write lock file \"%s\": %m", filename)));
+ }
+ if (close(fd))
+ {
+ int save_errno = errno;
+
+ unlink(filename);
+ errno = save_errno;
+ ereport(FATAL,
+ (errcode_for_file_access(),
+ errmsg("could not write lock file \"%s\": %m", filename)));
}
- close(fd);
/*
* Arrange for automatic removal of lockfile at proc_exit.
*/
on_proc_exit(UnlinkLockFile, PointerGetDatum(strdup(filename)));
-
- return true; /* Success! */
}
-bool
-CreateDataDirLockFile(const char *datadir, bool amPostmaster)
+/*
+ * Create the data directory lockfile.
+ *
+ * When this is called, we must have already switched the working
+ * directory to DataDir, so we can just use a relative path. This
+ * helps ensure that we are locking the directory we should be.
+ */
+void
+CreateDataDirLockFile(bool amPostmaster)
{
- char lockfile[MAXPGPATH];
-
- snprintf(lockfile, sizeof(lockfile), "%s/postmaster.pid", datadir);
- if (!CreateLockFile(lockfile, amPostmaster, true, datadir))
- return false;
- /* Save name of lockfile for RecordSharedMemoryInLockFile */
- strcpy(directoryLockFile, lockfile);
- return true;
+ CreateLockFile(DIRECTORY_LOCK_FILE, amPostmaster, true, DataDir);
}
-bool
+/*
+ * Create a lockfile for the specified Unix socket file.
+ */
+void
CreateSocketLockFile(const char *socketfile, bool amPostmaster)
{
char lockfile[MAXPGPATH];
snprintf(lockfile, sizeof(lockfile), "%s.lock", socketfile);
- if (!CreateLockFile(lockfile, amPostmaster, false, socketfile))
- return false;
+ CreateLockFile(lockfile, amPostmaster, false, socketfile);
/* Save name of lockfile for TouchSocketLockFile */
strcpy(socketLockFile, lockfile);
- return true;
}
/*
- * Re-read the socket lock file. This should be called every so often
- * to ensure that the lock file has a recent access date. That saves it
+ * TouchSocketLockFile -- mark socket lock file as recently accessed
+ *
+ * This routine should be called every so often to ensure that the lock file
+ * has a recent mod or access date. That saves it
* from being removed by overenthusiastic /tmp-directory-cleaner daemons.
* (Another reason we should never have put the socket file in /tmp...)
*/
void
TouchSocketLockFile(void)
{
- int fd;
- char buffer[1];
-
/* Do nothing if we did not create a socket... */
if (socketLockFile[0] != '\0')
{
- /* XXX any need to complain about errors here? */
+ /*
+ * utime() is POSIX standard, utimes() is a common alternative; if we
+ * have neither, fall back to actually reading the file (which only
+ * sets the access time not mod time, but that should be enough in
+ * most cases). In all paths, we ignore errors.
+ */
+#ifdef HAVE_UTIME
+ utime(socketLockFile, NULL);
+#else /* !HAVE_UTIME */
+#ifdef HAVE_UTIMES
+ utimes(socketLockFile, NULL);
+#else /* !HAVE_UTIMES */
+ int fd;
+ char buffer[1];
+
fd = open(socketLockFile, O_RDONLY | PG_BINARY, 0);
if (fd >= 0)
{
read(fd, buffer, sizeof(buffer));
close(fd);
}
+#endif /* HAVE_UTIMES */
+#endif /* HAVE_UTIME */
}
}
/*
* Append information about a shared memory segment to the data directory
- * lock file (if we have created one).
+ * lock file.
*
* This may be called multiple times in the life of a postmaster, if we
* delete and recreate shmem due to backend crash. Therefore, be prepared
* to overwrite existing information. (As of 7.1, a postmaster only creates
- * one shm seg anyway; but for the purposes here, if we did have more than
+ * one shm seg at a time; but for the purposes here, if we did have more than
* one then any one of them would do anyway.)
*/
void
-RecordSharedMemoryInLockFile(IpcMemoryKey shmKey, IpcMemoryId shmId)
+RecordSharedMemoryInLockFile(unsigned long id1, unsigned long id2)
{
int fd;
int len;
char *ptr;
char buffer[BLCKSZ];
- /*
- * Do nothing if we did not create a lockfile (probably because we are
- * running standalone).
- */
- if (directoryLockFile[0] == '\0')
- return;
-
- fd = open(directoryLockFile, O_RDWR | PG_BINARY, 0);
+ fd = open(DIRECTORY_LOCK_FILE, O_RDWR | PG_BINARY, 0);
if (fd < 0)
{
- elog(LOG, "Failed to rewrite %s: %m", directoryLockFile);
+ ereport(LOG,
+ (errcode_for_file_access(),
+ errmsg("could not open file \"%s\": %m",
+ DIRECTORY_LOCK_FILE)));
return;
}
len = read(fd, buffer, sizeof(buffer) - 100);
- if (len <= 0)
+ if (len < 0)
{
- elog(LOG, "Failed to read %s: %m", directoryLockFile);
+ ereport(LOG,
+ (errcode_for_file_access(),
+ errmsg("could not read from file \"%s\": %m",
+ DIRECTORY_LOCK_FILE)));
close(fd);
return;
}
if (ptr == NULL ||
(ptr = strchr(ptr + 1, '\n')) == NULL)
{
- elog(LOG, "Bogus data in %s", directoryLockFile);
+ elog(LOG, "bogus data in \"%s\"", DIRECTORY_LOCK_FILE);
close(fd);
return;
}
ptr++;
/*
- * Append shm key and ID. Format to try to keep it the same length
+ * Append key information. Format to try to keep it the same length
* always (trailing junk won't hurt, but might confuse humans).
*/
- sprintf(ptr, "%9lu %9lu\n",
- (unsigned long) shmKey, (unsigned long) shmId);
+ sprintf(ptr, "%9lu %9lu\n", id1, id2);
/*
* And rewrite the data. Since we write in a single kernel call, this
/* if write didn't set errno, assume problem is no disk space */
if (errno == 0)
errno = ENOSPC;
- elog(LOG, "Failed to write %s: %m", directoryLockFile);
+ ereport(LOG,
+ (errcode_for_file_access(),
+ errmsg("could not write to file \"%s\": %m",
+ DIRECTORY_LOCK_FILE)));
close(fd);
return;
}
- close(fd);
+ if (close(fd))
+ {
+ ereport(LOG,
+ (errcode_for_file_access(),
+ errmsg("could not write to file \"%s\": %m",
+ DIRECTORY_LOCK_FILE)));
+ }
}
* Determine whether the PG_VERSION file in directory `path' indicates
* a data version compatible with the version of this program.
*
- * If compatible, return. Otherwise, elog(FATAL).
+ * If compatible, return. Otherwise, ereport(FATAL).
*/
void
ValidatePgVersion(const char *path)
if (*endptr == '.')
my_minor = strtol(endptr + 1, NULL, 10);
- snprintf(full_path, MAXPGPATH, "%s/PG_VERSION", path);
+ snprintf(full_path, sizeof(full_path), "%s/PG_VERSION", path);
file = AllocateFile(full_path, "r");
if (!file)
{
if (errno == ENOENT)
- elog(FATAL, "File %s is missing. This is not a valid data directory.", full_path);
+ ereport(FATAL,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("\"%s\" is not a valid data directory",
+ path),
+ errdetail("File \"%s\" is missing.", full_path)));
else
- elog(FATAL, "cannot open %s: %m", full_path);
+ ereport(FATAL,
+ (errcode_for_file_access(),
+ errmsg("could not open file \"%s\": %m", full_path)));
}
ret = fscanf(file, "%ld.%ld", &file_major, &file_minor);
if (ret != 2)
- elog(FATAL, "File %s does not contain valid data. You need to initdb.", full_path);
+ ereport(FATAL,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("\"%s\" is not a valid data directory",
+ path),
+ errdetail("File \"%s\" does not contain valid data.",
+ full_path),
+ errhint("You may need to initdb.")));
FreeFile(file);
if (my_major != file_major || my_minor != file_minor)
- elog(FATAL, "The data directory was initialized by PostgreSQL version %ld.%ld, "
- "which is not compatible with this version %s.",
- file_major, file_minor, version_string);
+ ereport(FATAL,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("database files are incompatible with server"),
+ errdetail("The data directory was initialized by PostgreSQL version %ld.%ld, "
+ "which is not compatible with this version %s.",
+ file_major, file_minor, version_string)));
+}
+
+/*-------------------------------------------------------------------------
+ * Library preload support
+ *-------------------------------------------------------------------------
+ */
+
+/*
+ * GUC variables: lists of library names to be preloaded at postmaster
+ * start and at backend start
+ */
+char *shared_preload_libraries_string = NULL;
+char *local_preload_libraries_string = NULL;
+
+/*
+ * load the shared libraries listed in 'libraries'
+ *
+ * 'gucname': name of GUC variable, for error reports
+ * 'restricted': if true, force libraries to be in $libdir/plugins/
+ */
+static void
+load_libraries(const char *libraries, const char *gucname, bool restricted)
+{
+ char *rawstring;
+ List *elemlist;
+ ListCell *l;
+
+ if (libraries == NULL || libraries[0] == '\0')
+ return; /* nothing to do */
+
+ /* Need a modifiable copy of string */
+ rawstring = pstrdup(libraries);
+
+ /* Parse string into list of identifiers */
+ if (!SplitIdentifierString(rawstring, ',', &elemlist))
+ {
+ /* syntax error in list */
+ pfree(rawstring);
+ list_free(elemlist);
+ ereport(LOG,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("invalid list syntax in parameter \"%s\"",
+ gucname)));
+ return;
+ }
+
+ foreach(l, elemlist)
+ {
+ char *tok = (char *) lfirst(l);
+ char *filename;
+
+ filename = pstrdup(tok);
+ canonicalize_path(filename);
+ /* If restricting, insert $libdir/plugins if not mentioned already */
+ if (restricted && first_dir_separator(filename) == NULL)
+ {
+ char *expanded;
+
+ expanded = palloc(strlen("$libdir/plugins/") + strlen(filename) + 1);
+ strcpy(expanded, "$libdir/plugins/");
+ strcat(expanded, filename);
+ pfree(filename);
+ filename = expanded;
+ }
+ load_file(filename, restricted);
+ ereport(LOG,
+ (errmsg("loaded library \"%s\"", filename)));
+ pfree(filename);
+ }
+
+ pfree(rawstring);
+ list_free(elemlist);
+}
+
+/*
+ * process any libraries that should be preloaded at postmaster start
+ */
+void
+process_shared_preload_libraries(void)
+{
+ load_libraries(shared_preload_libraries_string,
+ "shared_preload_libraries",
+ false);
+}
+
+/*
+ * process any libraries that should be preloaded at backend start
+ */
+void
+process_local_preload_libraries(void)
+{
+ load_libraries(local_preload_libraries_string,
+ "local_preload_libraries",
+ true);
}
projects / postgresql / blobdiff