#include "postgres.h"
#include <sys/param.h>
#include <signal.h>
#include <time.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <grp.h>
#include <pwd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <utime.h>
#include "access/htup_details.h"
#include "access/parallel.h"
#include "catalog/pg_authid.h"
#include "common/file_perm.h"
#include "libpq/libpq.h"
#include "libpq/pqsignal.h"
#include "mb/pg_wchar.h"
#include "miscadmin.h"
#include "pgstat.h"
#include "postmaster/autovacuum.h"
#include "postmaster/interrupt.h"
#include "postmaster/postmaster.h"
#include "replication/slotsync.h"
#include "storage/fd.h"
#include "storage/ipc.h"
#include "storage/latch.h"
#include "storage/pg_shmem.h"
#include "storage/pmsignal.h"
#include "storage/proc.h"
#include "storage/procarray.h"
#include "utils/builtins.h"
#include "utils/guc.h"
#include "utils/inval.h"
#include "utils/memutils.h"
#include "utils/pidfile.h"
#include "utils/syscache.h"
#include "utils/varlena.h"
#include "utils/wait_event.h"
#include "postmaster/proctypelist.h"

Include dependency graph for miscinit.c:

Data Structures
struct	SerializedClientConnectionInfo

Macros
#define	DIRECTORY_LOCK_FILE "postmaster.pid"

#define	PG_PROCTYPE(bktype, bkcategory, description, main_func, shmem_attach) case bktype: backendDesc = description; break;

Typedefs
typedef struct SerializedClientConnectionInfo	SerializedClientConnectionInfo

Functions
void	InitPostmasterChild (void)

void	InitStandaloneProcess (const char *argv0)

void	SwitchToSharedLatch (void)

void	InitProcessLocalLatch (void)

void	SwitchBackToLocalLatch (void)

const char *	GetBackendTypeDesc (BackendType backendType)

void	SetDatabasePath (const char *path)

void	checkDataDir (void)

void	SetDataDir (const char *dir)

void	ChangeToDataDir (void)

Oid	GetUserId (void)

Oid	GetOuterUserId (void)

static void	SetOuterUserId (Oid userid, bool is_superuser)

Oid	GetSessionUserId (void)

bool	GetSessionUserIsSuperuser (void)

static void	SetSessionUserId (Oid userid, bool is_superuser)

const char *	GetSystemUser (void)

Oid	GetAuthenticatedUserId (void)

void	SetAuthenticatedUserId (Oid userid)

void	GetUserIdAndSecContext (Oid userid, int sec_context)

void	SetUserIdAndSecContext (Oid userid, int sec_context)

bool	InLocalUserIdChange (void)

bool	InSecurityRestrictedOperation (void)

bool	InNoForceRLSOperation (void)

void	GetUserIdAndContext (Oid userid, bool sec_def_context)

void	SetUserIdAndContext (Oid userid, bool sec_def_context)

bool	has_rolreplication (Oid roleid)

void	InitializeSessionUserId (const char *rolename, Oid roleid, bool bypass_login_check)

void	InitializeSessionUserIdStandalone (void)

void	InitializeSystemUser (const char authn_id, const char auth_method)

Datum	system_user (PG_FUNCTION_ARGS)

void	SetSessionAuthorization (Oid userid, bool is_superuser)

Oid	GetCurrentRoleId (void)

void	SetCurrentRoleId (Oid roleid, bool is_superuser)

char *	GetUserNameFromId (Oid roleid, bool noerr)

Size	EstimateClientConnectionInfoSpace (void)

void	SerializeClientConnectionInfo (Size maxsize PG_USED_FOR_ASSERTS_ONLY, char *start_address)

void	RestoreClientConnectionInfo (char *conninfo)

static void	UnlinkLockFiles (int status, Datum arg)

static void	CreateLockFile (const char filename, bool amPostmaster, const char socketDir, bool isDDLock, const char *refName)

void	CreateDataDirLockFile (bool amPostmaster)

void	CreateSocketLockFile (const char socketfile, bool amPostmaster, const char socketDir)

void	TouchSocketLockFiles (void)

void	AddToDataDirLockFile (int target_line, const char *str)

bool	RecheckDataDirLockFile (void)

void	ValidatePgVersion (const char *path)

static void	load_libraries (const char libraries, const char gucname, bool restricted)

void	process_shared_preload_libraries (void)

void	process_session_preload_libraries (void)

void	process_shmem_requests (void)

void	pg_bindtextdomain (const char *domain)

Variables
ProcessingMode	Mode = InitProcessing

BackendType	MyBackendType

static List *	lock_files = NIL

static Latch	LocalLatchData

bool	IgnoreSystemIndexes = false

static Oid	AuthenticatedUserId = InvalidOid

static Oid	SessionUserId = InvalidOid

static Oid	OuterUserId = InvalidOid

static Oid	CurrentUserId = InvalidOid

static const char *	SystemUser = NULL

static bool	SessionUserIsSuperuser = false

static int	SecurityRestrictionContext = 0

static bool	SetRoleIsActive = false

ClientConnectionInfo	MyClientConnectionInfo

char *	session_preload_libraries_string = NULL

char *	shared_preload_libraries_string = NULL

char *	local_preload_libraries_string = NULL

bool	process_shared_preload_libraries_in_progress = false

bool	process_shared_preload_libraries_done = false

shmem_request_hook_type	shmem_request_hook = NULL

bool	process_shmem_requests_in_progress = false

Macro Definition Documentation

◆ DIRECTORY_LOCK_FILE

#define DIRECTORY_LOCK_FILE "postmaster.pid"

Definition at line 61 of file miscinit.c.

◆ PG_PROCTYPE

#define PG_PROCTYPE	(	bktype,
		bkcategory,
		description,
		main_func,
		shmem_attach
	)	case bktype: backendDesc = description; break;

Typedef Documentation

◆ SerializedClientConnectionInfo

typedef struct SerializedClientConnectionInfo SerializedClientConnectionInfo

Function Documentation

◆ AddToDataDirLockFile()

void AddToDataDirLockFile	(	int	target_line,
		const char *	str
	)

Definition at line 1520 of file miscinit.c.

{
    int         fd;
    int         len;
    int         lineno;
    char       *srcptr;
    char       *destptr;
    char        srcbuffer[BLCKSZ];
    char        destbuffer[BLCKSZ];
 
    fd = open(DIRECTORY_LOCK_FILE, O_RDWR | PG_BINARY, 0);
    if (fd < 0)
    {
        ereport(LOG,
                (errcode_for_file_access(),
                 errmsg("could not open file \"%s\": %m",
                        DIRECTORY_LOCK_FILE)));
        return;
    }
    pgstat_report_wait_start(WAIT_EVENT_LOCK_FILE_ADDTODATADIR_READ);
    len = read(fd, srcbuffer, sizeof(srcbuffer) - 1);
    pgstat_report_wait_end();
    if (len < 0)
    {
        ereport(LOG,
                (errcode_for_file_access(),
                 errmsg("could not read from file \"%s\": %m",
                        DIRECTORY_LOCK_FILE)));
        close(fd);
        return;
    }
    srcbuffer[len] = '\0';
 
    /*
     * Advance over lines we are not supposed to rewrite, then copy them to
     * destbuffer.
     */
    srcptr = srcbuffer;
    for (lineno = 1; lineno < target_line; lineno++)
    {
        char       *eol = strchr(srcptr, '\n');
 
        if (eol == NULL)
            break;              /* not enough lines in file yet */
        srcptr = eol + 1;
    }
    memcpy(destbuffer, srcbuffer, srcptr - srcbuffer);
    destptr = destbuffer + (srcptr - srcbuffer);
 
    /*
     * Fill in any missing lines before the target line, in case lines are
     * added to the file out of order.
     */
    for (; lineno < target_line; lineno++)
    {
        if (destptr < destbuffer + sizeof(destbuffer))
            *destptr++ = '\n';
    }
 
    /*
     * Write or rewrite the target line.
     */
    snprintf(destptr, destbuffer + sizeof(destbuffer) - destptr, "%s\n", str);
    destptr += strlen(destptr);
 
    /*
     * If there are more lines in the old file, append them to destbuffer.
     */
    if ((srcptr = strchr(srcptr, '\n')) != NULL)
    {
        srcptr++;
        snprintf(destptr, destbuffer + sizeof(destbuffer) - destptr, "%s",
                 srcptr);
    }
 
    /*
     * And rewrite the data.  Since we write in a single kernel call, this
     * update should appear atomic to onlookers.
     */
    len = strlen(destbuffer);
    errno = 0;
    pgstat_report_wait_start(WAIT_EVENT_LOCK_FILE_ADDTODATADIR_WRITE);
    if (pg_pwrite(fd, destbuffer, len, 0) != len)
    {
        pgstat_report_wait_end();
        /* if write didn't set errno, assume problem is no disk space */
        if (errno == 0)
            errno = ENOSPC;
        ereport(LOG,
                (errcode_for_file_access(),
                 errmsg("could not write to file \"%s\": %m",
                        DIRECTORY_LOCK_FILE)));
        close(fd);
        return;
    }
    pgstat_report_wait_end();
    pgstat_report_wait_start(WAIT_EVENT_LOCK_FILE_ADDTODATADIR_SYNC);
    if (pg_fsync(fd) != 0)
    {
        ereport(LOG,
                (errcode_for_file_access(),
                 errmsg("could not write to file \"%s\": %m",
                        DIRECTORY_LOCK_FILE)));
    }
    pgstat_report_wait_end();
    if (close(fd) != 0)
    {
        ereport(LOG,
                (errcode_for_file_access(),
                 errmsg("could not write to file \"%s\": %m",
                        DIRECTORY_LOCK_FILE)));
    }
}

References close, DIRECTORY_LOCK_FILE, ereport, errcode_for_file_access(), errmsg, fb(), fd(), len, LOG, PG_BINARY, pg_fsync(), pg_pwrite, pgstat_report_wait_end(), pgstat_report_wait_start(), read, snprintf, and str.

Referenced by InternalIpcMemoryCreate(), PostmasterMain(), process_pm_child_exit(), process_pm_pmsignal(), and process_pm_shutdown_request().

◆ ChangeToDataDir()

void ChangeToDataDir ( void )

Definition at line 410 of file miscinit.c.

{
    Assert(DataDir);
 
    if (chdir(DataDir) < 0)
        ereport(FATAL,
                (errcode_for_file_access(),
                 errmsg("could not change directory to \"%s\": %m",
                        DataDir)));
}

References Assert, DataDir, ereport, errcode_for_file_access(), errmsg, FATAL, and fb().

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

◆ checkDataDir()

void checkDataDir ( void )

Definition at line 297 of file miscinit.c.

{
    struct stat stat_buf;
 
    Assert(DataDir);
 
    if (stat(DataDir, &stat_buf) != 0)
    {
        if (errno == ENOENT)
            ereport(FATAL,
                    (errcode_for_file_access(),
                     errmsg("data directory \"%s\" does not exist",
                            DataDir)));
        else
            ereport(FATAL,
                    (errcode_for_file_access(),
                     errmsg("could not read permissions of directory \"%s\": %m",
                            DataDir)));
    }
 
    /* eventual chdir would fail anyway, but let's test ... */
    if (!S_ISDIR(stat_buf.st_mode))
        ereport(FATAL,
                (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                 errmsg("specified data directory \"%s\" is not a directory",
                        DataDir)));
 
    /*
     * Check that the directory belongs to my userid; if not, reject.
     *
     * This check is an essential part of the interlock that prevents two
     * postmasters from starting in the same directory (see CreateLockFile()).
     * Do not remove or weaken it.
     *
     * XXX can we safely enable this check on Windows?
     */
#if !defined(WIN32) && !defined(__CYGWIN__)
    if (stat_buf.st_uid != geteuid())
        ereport(FATAL,
                (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                 errmsg("data directory \"%s\" has wrong ownership",
                        DataDir),
                 errhint("The server must be started by the user that owns the data directory.")));
#endif
 
    /*
     * Check if the directory has correct permissions.  If not, reject.
     *
     * Only two possible modes are allowed, 0700 and 0750.  The latter mode
     * indicates that group read/execute should be allowed on all newly
     * created files and directories.
     *
     * XXX temporarily suppress check when on Windows, because there may not
     * be proper support for Unix-y file permissions.  Need to think of a
     * reasonable check to apply on Windows.
     */
#if !defined(WIN32) && !defined(__CYGWIN__)
    if (stat_buf.st_mode & PG_MODE_MASK_GROUP)
        ereport(FATAL,
                (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                 errmsg("data directory \"%s\" has invalid permissions",
                        DataDir),
                 errdetail("Permissions should be u=rwx (0700) or u=rwx,g=rx (0750).")));
#endif
 
    /*
     * Reset creation modes and mask based on the mode of the data directory.
     *
     * The mask was set earlier in startup to disallow group permissions on
     * newly created files and directories.  However, if group read/execute
     * are present on the data directory then modify the create modes and mask
     * to allow group read/execute on newly created files and directories and
     * set the data_directory_mode GUC.
     *
     * Suppress when on Windows, because there may not be proper support for
     * Unix-y file permissions.
     */
#if !defined(WIN32) && !defined(__CYGWIN__)
    SetDataDirectoryCreatePerm(stat_buf.st_mode);
 
    umask(pg_mode_mask);
    data_directory_mode = pg_dir_create_mode;
#endif
 
    /* Check for PG_VERSION */
    ValidatePgVersion(DataDir);
}

References Assert, data_directory_mode, DataDir, ereport, errcode(), errcode_for_file_access(), errdetail(), errhint(), errmsg, FATAL, fb(), pg_dir_create_mode, pg_mode_mask, PG_MODE_MASK_GROUP, S_ISDIR, SetDataDirectoryCreatePerm(), stat, and ValidatePgVersion().

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

◆ CreateDataDirLockFile()

void CreateDataDirLockFile ( bool amPostmaster )

Definition at line 1464 of file miscinit.c.

{
    CreateLockFile(DIRECTORY_LOCK_FILE, amPostmaster, "", true, DataDir);
}

References CreateLockFile(), DataDir, DIRECTORY_LOCK_FILE, and fb().

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

◆ CreateLockFile()

static void CreateLockFile	(	const char *	filename,
		bool	amPostmaster,
		const char *	socketDir,
		bool	isDDLock,
		const char *	refName
	)

static

Definition at line 1159 of file miscinit.c.

{
    int         fd;
    char        buffer[MAXPGPATH * 2 + 256];
    int         ntries;
    int         len;
    int         encoded_pid;
    pid_t       other_pid;
    pid_t       my_pid,
                my_p_pid,
                my_gp_pid;
    const char *envvar;
 
    /*
     * If the PID in the lockfile is our own PID or our parent's or
     * grandparent's PID, then the file must be stale (probably left over from
     * a previous system boot cycle).  We need to check this because of the
     * likelihood that a reboot will assign exactly the same PID as we had in
     * the previous reboot, or one that's only one or two counts larger and
     * hence the lockfile's PID now refers to an ancestor shell process.  We
     * allow pg_ctl to pass down its parent shell PID (our grandparent PID)
     * via the environment variable PG_GRANDPARENT_PID; this is so that
     * launching the postmaster via pg_ctl can be just as reliable as
     * launching it directly.  There is no provision for detecting
     * further-removed ancestor processes, 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.  Note that we
     * cannot get a false negative this way, because an existing postmaster
     * would surely never launch a competing postmaster or pg_ctl process
     * directly.
     */
    my_pid = getpid();
 
#ifndef WIN32
    my_p_pid = getppid();
#else
 
    /*
     * Windows hasn't got getppid(), but doesn't need it since it's not using
     * real kill() either...
     */
    my_p_pid = 0;
#endif
 
    envvar = getenv("PG_GRANDPARENT_PID");
    if (envvar)
        my_gp_pid = atoi(envvar);
    else
        my_gp_pid = 0;
 
    /*
     * 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 0600/0640.  See
         * comments below.
         */
        fd = open(filename, O_RDWR | O_CREAT | O_EXCL, pg_file_create_mode);
        if (fd >= 0)
            break;              /* Success; exit the retry loop */
 
        /*
         * Couldn't create the pid file. Probably it already exists.
         */
        if ((errno != EEXIST && errno != EACCES) || ntries > 100)
            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
         * here: file might have been deleted since we tried to create it.
         */
        fd = open(filename, O_RDONLY, pg_file_create_mode);
        if (fd < 0)
        {
            if (errno == ENOENT)
                continue;       /* race condition; try again */
            ereport(FATAL,
                    (errcode_for_file_access(),
                     errmsg("could not open lock file \"%s\": %m",
                            filename)));
        }
        pgstat_report_wait_start(WAIT_EVENT_LOCK_FILE_CREATE_READ);
        if ((len = read(fd, buffer, sizeof(buffer) - 1)) < 0)
            ereport(FATAL,
                    (errcode_for_file_access(),
                     errmsg("could not read lock file \"%s\": %m",
                            filename)));
        pgstat_report_wait_end();
        close(fd);
 
        if (len == 0)
        {
            ereport(FATAL,
                    (errcode(ERRCODE_LOCK_FILE_EXISTS),
                     errmsg("lock file \"%s\" is empty", filename),
                     errhint("Either another server is starting, or the lock file is the remnant of a previous server startup crash.")));
        }
 
        buffer[len] = '\0';
        encoded_pid = atoi(buffer);
 
        /* if pid < 0, the pid is for postgres, not postmaster */
        other_pid = (pid_t) (encoded_pid < 0 ? -encoded_pid : encoded_pid);
 
        if (other_pid <= 0)
            elog(FATAL, "bogus data in lock file \"%s\": \"%s\"",
                 filename, buffer);
 
        /*
         * Check to see if the other process still exists
         *
         * Per discussion above, my_pid, my_p_pid, and my_gp_pid can be
         * ignored as false matches.
         *
         * Normally kill() will fail with ESRCH if the given PID doesn't
         * exist.
         *
         * 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, as enforced in checkDataDir(). Also, since we
         * create the lockfiles mode 0600/0640, 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.)
         */
        if (other_pid != my_pid && other_pid != my_p_pid &&
            other_pid != my_gp_pid)
        {
            if (kill(other_pid, 0) == 0 ||
                (errno != ESRCH && errno != EPERM))
            {
                /* lockfile belongs to a live process */
                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.
         *
         * Note: because postmaster.pid is written in multiple steps, we might
         * not find the shmem ID values in it; we can't treat that as an
         * error.
         */
        if (isDDLock)
        {
            char       *ptr = buffer;
            unsigned long id1,
                        id2;
            int         lineno;
 
            for (lineno = 1; lineno < LOCK_FILE_LINE_SHMEM_KEY; lineno++)
            {
                if ((ptr = strchr(ptr, '\n')) == NULL)
                    break;
                ptr++;
            }
 
            if (ptr != NULL &&
                sscanf(ptr, "%lu %lu", &id1, &id2) == 2)
            {
                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("Terminate any old server processes associated with data directory \"%s\".",
                                     refName)));
            }
        }
 
        /*
         * 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)
            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.")));
    }
 
    /*
     * Successfully created the file, now fill it.  See comment in pidfile.h
     * about the contents.  Note that we write the same first five lines into
     * both datadir and socket lockfiles; although more stuff may get added to
     * the datadir lockfile later.
     */
    snprintf(buffer, sizeof(buffer), "%d\n%s\n" INT64_FORMAT "\n%d\n%s\n",
             amPostmaster ? (int) my_pid : -((int) my_pid),
             DataDir,
             MyStartTime,
             PostPortNumber,
             socketDir);
 
    /*
     * In a standalone backend, the next line (LOCK_FILE_LINE_LISTEN_ADDR)
     * will never receive data, so fill it in as empty now.
     */
    if (isDDLock && !amPostmaster)
        strlcat(buffer, "\n", sizeof(buffer));
 
    errno = 0;
    pgstat_report_wait_start(WAIT_EVENT_LOCK_FILE_CREATE_WRITE);
    if (write(fd, buffer, strlen(buffer)) != strlen(buffer))
    {
        int         save_errno = errno;
 
        close(fd);
        unlink(filename);
        /* if write didn't set errno, assume problem is no disk space */
        errno = save_errno ? save_errno : ENOSPC;
        ereport(FATAL,
                (errcode_for_file_access(),
                 errmsg("could not write lock file \"%s\": %m", filename)));
    }
    pgstat_report_wait_end();
 
    pgstat_report_wait_start(WAIT_EVENT_LOCK_FILE_CREATE_SYNC);
    if (pg_fsync(fd) != 0)
    {
        int         save_errno = errno;
 
        close(fd);
        unlink(filename);
        errno = save_errno;
        ereport(FATAL,
                (errcode_for_file_access(),
                 errmsg("could not write lock file \"%s\": %m", filename)));
    }
    pgstat_report_wait_end();
    if (close(fd) != 0)
    {
        int         save_errno = errno;
 
        unlink(filename);
        errno = save_errno;
        ereport(FATAL,
                (errcode_for_file_access(),
                 errmsg("could not write lock file \"%s\": %m", filename)));
    }
 
    /*
     * Arrange to unlink the lock file(s) at proc_exit.  If this is the first
     * one, set up the on_proc_exit function to do it; then add this lock file
     * to the list of files to unlink.
     */
    if (lock_files == NIL)
        on_proc_exit(UnlinkLockFiles, 0);
 
    /*
     * Use lcons so that the lock files are unlinked in reverse order of
     * creation; this is critical!
     */
    lock_files = lcons(pstrdup(filename), lock_files);
}

References close, DataDir, elog, ereport, errcode(), errcode_for_file_access(), errhint(), errmsg, FATAL, fb(), fd(), filename, INT64_FORMAT, kill, lcons(), len, LOCK_FILE_LINE_SHMEM_KEY, lock_files, MAXPGPATH, MyStartTime, NIL, on_proc_exit(), pg_file_create_mode, pg_fsync(), PGSharedMemoryIsInUse(), pgstat_report_wait_end(), pgstat_report_wait_start(), PostPortNumber, pstrdup(), read, snprintf, strlcat(), UnlinkLockFiles(), and write.

Referenced by CreateDataDirLockFile(), and CreateSocketLockFile().

◆ CreateSocketLockFile()

void CreateSocketLockFile	(	const char *	socketfile,
		bool	amPostmaster,
		const char *	socketDir
	)

Definition at line 1473 of file miscinit.c.

{
    char        lockfile[MAXPGPATH];
 
    snprintf(lockfile, sizeof(lockfile), "%s.lock", socketfile);
    CreateLockFile(lockfile, amPostmaster, socketDir, false, socketfile);
}

References CreateLockFile(), fb(), MAXPGPATH, and snprintf.

Referenced by Lock_AF_UNIX().

◆ EstimateClientConnectionInfoSpace()

Size EstimateClientConnectionInfoSpace ( void )

Definition at line 1036 of file miscinit.c.

{
    Size        size = 0;
 
    size = add_size(size, sizeof(SerializedClientConnectionInfo));
 
    if (MyClientConnectionInfo.authn_id)
        size = add_size(size, strlen(MyClientConnectionInfo.authn_id) + 1);
 
    return size;
}

References add_size(), ClientConnectionInfo::authn_id, fb(), and MyClientConnectionInfo.

Referenced by InitializeParallelDSM().

◆ GetAuthenticatedUserId()

Oid GetAuthenticatedUserId ( void )

Definition at line 546 of file miscinit.c.

{
    Assert(OidIsValid(AuthenticatedUserId));
    return AuthenticatedUserId;
}

References Assert, AuthenticatedUserId, and OidIsValid.

Referenced by check_session_authorization(), and InitializeParallelDSM().

◆ GetBackendTypeDesc()

const char * GetBackendTypeDesc ( BackendType backendType )

Definition at line 264 of file miscinit.c.

{
    const char *backendDesc = gettext_noop("unknown process type");
 
    switch (backendType)
    {
#define PG_PROCTYPE(bktype, bkcategory, description, main_func, shmem_attach)   \
        case bktype: backendDesc = description; break;
#include "postmaster/proctypelist.h"
#undef PG_PROCTYPE
    }
    return backendDesc;
}

References fb(), and gettext_noop.

Referenced by BackendInitialize(), BackendStartup(), CleanupBackend(), CountChildren(), get_backend_type_for_log(), init_ps_display(), pg_stat_get_activity(), pg_stat_io_build_tuples(), and signal_child().

◆ GetCurrentRoleId()

Oid GetCurrentRoleId ( void )

Definition at line 936 of file miscinit.c.

{
    if (SetRoleIsActive)
        return OuterUserId;
    else
        return InvalidOid;
}

References InvalidOid, OuterUserId, and SetRoleIsActive.

Referenced by check_role(), InitializeParallelDSM(), and show_role().

◆ GetOuterUserId()

Oid GetOuterUserId ( void )

Definition at line 481 of file miscinit.c.

{
    Assert(OidIsValid(OuterUserId));
    return OuterUserId;
}

References Assert, OidIsValid, and OuterUserId.

Referenced by DropRole(), and RenameRole().

◆ GetSessionUserId()

Oid GetSessionUserId ( void )

Definition at line 509 of file miscinit.c.

{
    Assert(OidIsValid(SessionUserId));
    return SessionUserId;
}

References Assert, OidIsValid, and SessionUserId.

Referenced by check_role(), check_session_authorization(), DropRole(), get_rolespec_oid(), get_rolespec_tuple(), InitializeParallelDSM(), InitPostgres(), pgstat_bestart_final(), RenameRole(), and session_user().

◆ GetSessionUserIsSuperuser()

bool GetSessionUserIsSuperuser ( void )

Definition at line 516 of file miscinit.c.

{
    Assert(OidIsValid(SessionUserId));
    return SessionUserIsSuperuser;
}

References Assert, OidIsValid, SessionUserId, and SessionUserIsSuperuser.

Referenced by check_session_authorization(), and InitializeParallelDSM().

◆ GetSystemUser()

const char * GetSystemUser ( void )

Definition at line 536 of file miscinit.c.

{
    return SystemUser;
}

References SystemUser.

Referenced by system_user().

◆ GetUserId()

Oid GetUserId ( void )

Definition at line 470 of file miscinit.c.

{
    Assert(OidIsValid(CurrentUserId));
    return CurrentUserId;
}

References Assert, CurrentUserId, and OidIsValid.

◆ GetUserIdAndContext()

void GetUserIdAndContext	(	Oid *	userid,
		bool *	sec_def_context
	)

Definition at line 662 of file miscinit.c.

{
    *userid = CurrentUserId;
    *sec_def_context = InLocalUserIdChange();
}

References CurrentUserId, fb(), and InLocalUserIdChange().

◆ GetUserIdAndSecContext()

void GetUserIdAndSecContext	(	Oid *	userid,
		int *	sec_context
	)

Definition at line 613 of file miscinit.c.

{
    *userid = CurrentUserId;
    *sec_context = SecurityRestrictionContext;
}

References CurrentUserId, and SecurityRestrictionContext.

Referenced by AfterTriggerExecute(), amcheck_lock_relation_and_check(), ATExecMergePartitions(), ATExecSplitPartition(), brin_summarize_range(), cluster_rel(), ComputeIndexAttrs(), CreateSchemaCommand(), DefineIndex(), do_analyze_rel(), execute_extension_script(), fmgr_security_definer(), index_build(), index_concurrently_build(), InitializeParallelDSM(), PushTransaction(), RefreshMatViewByOid(), reindex_index(), ReindexRelationConcurrently(), ri_PerformCheck(), ri_PlanCheck(), StartTransaction(), SwitchToUntrustedUser(), vacuum_rel(), and validate_index().

◆ GetUserNameFromId()

char * GetUserNameFromId	(	Oid	roleid,
		bool	noerr
	)

Definition at line 989 of file miscinit.c.

{
    HeapTuple   tuple;
    char       *result;
 
    tuple = SearchSysCache1(AUTHOID, ObjectIdGetDatum(roleid));
    if (!HeapTupleIsValid(tuple))
    {
        if (!noerr)
            ereport(ERROR,
                    (errcode(ERRCODE_UNDEFINED_OBJECT),
                     errmsg("invalid role OID: %u", roleid)));
        result = NULL;
    }
    else
    {
        result = pstrdup(NameStr(((Form_pg_authid) GETSTRUCT(tuple))->rolname));
        ReleaseSysCache(tuple);
    }
    return result;
}

References ereport, errcode(), errmsg, ERROR, fb(), Form_pg_authid, GETSTRUCT(), HeapTupleIsValid, NameStr, ObjectIdGetDatum(), pstrdup(), ReleaseSysCache(), rolname, and SearchSysCache1().

Referenced by AddRoleMems(), AlterSubscription(), AlterSubscriptionOwner_internal(), check_can_set_role(), check_object_ownership(), check_role_grantor(), check_role_membership_authorization(), current_user(), DelRoleMems(), DropOwnedObjects(), DropSubscription(), execute_extension_script(), getObjectDescription(), getObjectIdentityParts(), GetSubscription(), insert_username(), LogicalRepSyncTableStart(), ReassignOwnedObjects(), regroleout(), select_best_grantor(), session_user(), SwitchToUntrustedUser(), and TargetPrivilegesCheck().

◆ has_rolreplication()

bool has_rolreplication ( Oid roleid )

Definition at line 689 of file miscinit.c.

{
    bool        result = false;
    HeapTuple   utup;
 
    /* Superusers bypass all permission checking. */
    if (superuser_arg(roleid))
        return true;
 
    utup = SearchSysCache1(AUTHOID, ObjectIdGetDatum(roleid));
    if (HeapTupleIsValid(utup))
    {
        result = ((Form_pg_authid) GETSTRUCT(utup))->rolreplication;
        ReleaseSysCache(utup);
    }
    return result;
}

References fb(), Form_pg_authid, GETSTRUCT(), HeapTupleIsValid, ObjectIdGetDatum(), ReleaseSysCache(), rolreplication, SearchSysCache1(), and superuser_arg().

Referenced by AlterRole(), binary_upgrade_check_logical_slot_pending_wal(), CheckSlotPermissions(), CreateRole(), and InitPostgres().

◆ InitializeSessionUserId()

void InitializeSessionUserId	(	const char *	rolename,
		Oid	roleid,
		bool	bypass_login_check
	)

Definition at line 711 of file miscinit.c.

{
    HeapTuple   roleTup;
    Form_pg_authid rform;
    char       *rname;
    bool        is_superuser;
 
    /*
     * In a parallel worker, we don't have to do anything here.
     * ParallelWorkerMain already set our output variables, and we aren't
     * going to enforce either rolcanlogin or rolconnlimit.  Furthermore, we
     * don't really want to perform a catalog lookup for the role: we don't
     * want to fail if it's been dropped.
     */
    if (InitializingParallelWorker)
    {
        Assert(bypass_login_check);
        return;
    }
 
    /*
     * Don't do scans if we're bootstrapping, none of the system catalogs
     * exist yet, and they should be owned by postgres anyway.
     */
    Assert(!IsBootstrapProcessingMode());
 
    /*
     * Make sure syscache entries are flushed for recent catalog changes. This
     * allows us to find roles that were created on-the-fly during
     * authentication.
     */
    AcceptInvalidationMessages();
 
    /*
     * Look up the role, either by name if that's given or by OID if not.
     */
    if (rolename != NULL)
    {
        roleTup = SearchSysCache1(AUTHNAME, PointerGetDatum(rolename));
        if (!HeapTupleIsValid(roleTup))
            ereport(FATAL,
                    (errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION),
                     errmsg("role \"%s\" does not exist", rolename)));
    }
    else
    {
        roleTup = SearchSysCache1(AUTHOID, ObjectIdGetDatum(roleid));
        if (!HeapTupleIsValid(roleTup))
            ereport(FATAL,
                    (errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION),
                     errmsg("role with OID %u does not exist", roleid)));
    }
 
    rform = (Form_pg_authid) GETSTRUCT(roleTup);
    roleid = rform->oid;
    rname = NameStr(rform->rolname);
    is_superuser = rform->rolsuper;
 
    SetAuthenticatedUserId(roleid);
 
    /*
     * Set SessionUserId and related variables, including "role", via the GUC
     * mechanisms.
     *
     * Note: ideally we would use PGC_S_DYNAMIC_DEFAULT here, so that
     * session_authorization could subsequently be changed from
     * pg_db_role_setting entries.  Instead, session_authorization in
     * pg_db_role_setting has no effect.  Changing that would require solving
     * two problems:
     *
     * 1. If pg_db_role_setting has values for both session_authorization and
     * role, we could not be sure which order those would be applied in, and
     * it would matter.
     *
     * 2. Sites may have years-old session_authorization entries.  There's not
     * been any particular reason to remove them.  Ending the dormancy of
     * those entries could seriously change application behavior, so only a
     * major release should do that.
     */
    SetConfigOption("session_authorization", rname,
                    PGC_BACKEND, PGC_S_OVERRIDE);
 
    /*
     * 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;".
     */
    if (IsUnderPostmaster)
    {
        /*
         * Is role allowed to login at all?  (But background workers can
         * override this by setting bypass_login_check.)
         */
        if (!bypass_login_check && !rform->rolcanlogin)
            ereport(FATAL,
                    (errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION),
                     errmsg("role \"%s\" is not permitted to log in",
                            rname)));
 
        /*
         * Check connection limit for this role.  We enforce the limit only
         * for regular backends, since other process types have their own
         * PGPROC pools.
         *
         * 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 &&
            AmRegularBackendProcess() &&
            !is_superuser &&
            CountUserBackends(roleid) > rform->rolconnlimit)
            ereport(FATAL,
                    (errcode(ERRCODE_TOO_MANY_CONNECTIONS),
                     errmsg("too many connections for role \"%s\"",
                            rname)));
    }
 
    ReleaseSysCache(roleTup);
}

References AcceptInvalidationMessages(), AmRegularBackendProcess, Assert, CountUserBackends(), ereport, errcode(), errmsg, FATAL, fb(), Form_pg_authid, GETSTRUCT(), HeapTupleIsValid, InitializingParallelWorker, is_superuser(), IsBootstrapProcessingMode, IsUnderPostmaster, NameStr, ObjectIdGetDatum(), PGC_BACKEND, PGC_S_OVERRIDE, PointerGetDatum(), ReleaseSysCache(), SearchSysCache1(), SetAuthenticatedUserId(), and SetConfigOption().

Referenced by InitPostgres().

◆ InitializeSessionUserIdStandalone()

void InitializeSessionUserIdStandalone ( void )

Definition at line 841 of file miscinit.c.

{
    /*
     * This function should only be called in single-user mode, in autovacuum
     * workers, in slot sync worker and in background workers.
     */
    Assert(!IsUnderPostmaster || AmAutoVacuumWorkerProcess() ||
           AmLogicalSlotSyncWorkerProcess() || AmBackgroundWorkerProcess());
 
    /* call only once */
    Assert(!OidIsValid(AuthenticatedUserId));
 
    AuthenticatedUserId = BOOTSTRAP_SUPERUSERID;
 
    /*
     * XXX Ideally we'd do this via SetConfigOption("session_authorization"),
     * but we lack the role name needed to do that, and we can't fetch it
     * because one reason for this special case is to be able to start up even
     * if something's happened to the BOOTSTRAP_SUPERUSERID's pg_authid row.
     * Since we don't set the GUC itself, C code will see the value as NULL,
     * and current_setting() will report an empty string within this session.
     */
    SetSessionAuthorization(BOOTSTRAP_SUPERUSERID, true);
 
    /* We could do SetConfigOption("role"), but let's be consistent */
    SetCurrentRoleId(InvalidOid, false);
}

References AmAutoVacuumWorkerProcess, AmBackgroundWorkerProcess, AmLogicalSlotSyncWorkerProcess, Assert, AuthenticatedUserId, fb(), InvalidOid, IsUnderPostmaster, OidIsValid, SetCurrentRoleId(), and SetSessionAuthorization().

Referenced by InitPostgres().

◆ InitializeSystemUser()

void InitializeSystemUser	(	const char *	authn_id,
		const char *	auth_method
	)

Definition at line 875 of file miscinit.c.

{
    char       *system_user;
 
    /* call only once */
    Assert(SystemUser == NULL);
 
    /*
     * InitializeSystemUser should be called only when authn_id is not NULL,
     * meaning that auth_method is valid.
     */
    Assert(authn_id != NULL);
 
    system_user = psprintf("%s:%s", auth_method, authn_id);
 
    /* Store SystemUser in long-lived storage */
    SystemUser = MemoryContextStrdup(TopMemoryContext, system_user);
    pfree(system_user);
}

References Assert, authn_id, fb(), MemoryContextStrdup(), pfree(), psprintf(), system_user(), SystemUser, and TopMemoryContext.

Referenced by InitPostgres(), and ParallelWorkerMain().

◆ InitPostmasterChild()

void InitPostmasterChild ( void )

Definition at line 97 of file miscinit.c.

{
    IsUnderPostmaster = true;   /* we are a postmaster subprocess now */
 
    /*
     * Start our win32 signal implementation. This has to be done after we
     * read the backend variables, because we need to pick up the signal pipe
     * from the parent process.
     */
#ifdef WIN32
    pgwin32_signal_initialize();
#endif
 
    InitProcessGlobals();
 
    /*
     * make sure stderr is in binary mode before anything can possibly be
     * written to it, in case it's actually the syslogger pipe, so the pipe
     * chunking protocol isn't disturbed. Non-logpipe data gets translated on
     * redirection (e.g. via pg_ctl -l) anyway.
     */
#ifdef WIN32
    _setmode(fileno(stderr), _O_BINARY);
#endif
 
    /* We don't want the postmaster's proc_exit() handlers */
    on_exit_reset();
 
    /* In EXEC_BACKEND case we will not have inherited BlockSig etc values */
#ifdef EXEC_BACKEND
    pqinitmask();
#endif
 
    /* Initialize process-local latch support */
    InitializeWaitEventSupport();
    InitProcessLocalLatch();
    InitializeLatchWaitSet();
 
    /*
     * If possible, make this process a group leader, so that the postmaster
     * can signal any child processes too. Not all processes will have
     * children, but for consistency we make all postmaster child processes do
     * this.
     */
#ifdef HAVE_SETSID
    if (setsid() < 0)
        elog(FATAL, "setsid() failed: %m");
#endif
 
    /*
     * Every postmaster child process is expected to respond promptly to
     * SIGQUIT at all times.  Therefore we centrally remove SIGQUIT from
     * BlockSig and install a suitable signal handler.  (Client-facing
     * processes may choose to replace this default choice of handler with
     * quickdie().)  All other blockable signals remain blocked for now.
     */
    pqsignal(SIGQUIT, SignalHandlerForCrashExit);
 
    sigdelset(&BlockSig, SIGQUIT);
    sigprocmask(SIG_SETMASK, &BlockSig, NULL);
 
    /* Request a signal if the postmaster dies, if possible. */
    PostmasterDeathSignalInit();
 
    /* Don't give the pipe to subprograms that we execute. */
#ifndef WIN32
    if (fcntl(postmaster_alive_fds[POSTMASTER_FD_WATCH], F_SETFD, FD_CLOEXEC) < 0)
        ereport(FATAL,
                (errcode_for_socket_access(),
                 errmsg_internal("could not set postmaster death monitoring pipe to FD_CLOEXEC mode: %m")));
#endif
}

References BlockSig, elog, ereport, errcode_for_socket_access(), errmsg_internal(), FATAL, fb(), InitializeLatchWaitSet(), InitializeWaitEventSupport(), InitProcessGlobals(), InitProcessLocalLatch(), IsUnderPostmaster, on_exit_reset(), pgwin32_signal_initialize(), postmaster_alive_fds, POSTMASTER_FD_WATCH, PostmasterDeathSignalInit(), pqinitmask(), pqsignal, SignalHandlerForCrashExit(), and SIGQUIT.

Referenced by postmaster_child_launch().

◆ InitProcessLocalLatch()

void InitProcessLocalLatch ( void )

Definition at line 236 of file miscinit.c.

{
    MyLatch = &LocalLatchData;
    InitLatch(MyLatch);
}

References InitLatch(), LocalLatchData, and MyLatch.

Referenced by InitPostmasterChild(), InitStandaloneProcess(), and PostmasterMain().

◆ InitStandaloneProcess()

void InitStandaloneProcess ( const char * argv0 )

Definition at line 176 of file miscinit.c.

{
    Assert(!IsPostmasterEnvironment);
 
    MyBackendType = B_STANDALONE_BACKEND;
 
    /*
     * Start our win32 signal implementation
     */
#ifdef WIN32
    pgwin32_signal_initialize();
#endif
 
    InitProcessGlobals();
 
    /* Initialize process-local latch support */
    InitializeWaitEventSupport();
    InitProcessLocalLatch();
    InitializeLatchWaitSet();
 
    /*
     * For consistency with InitPostmasterChild, initialize signal mask here.
     * But we don't unblock SIGQUIT or provide a default handler for it.
     */
    pqinitmask();
    sigprocmask(SIG_SETMASK, &BlockSig, NULL);
 
    /* Compute paths, no postmaster to inherit from */
    if (my_exec_path[0] == '\0')
    {
        if (find_my_exec(argv0, my_exec_path) < 0)
            elog(FATAL, "%s: could not locate my own executable path",
                 argv0);
    }
 
    if (pkglib_path[0] == '\0')
        get_pkglib_path(my_exec_path, pkglib_path);
}

References argv0, Assert, B_STANDALONE_BACKEND, BlockSig, elog, FATAL, fb(), find_my_exec(), get_pkglib_path(), InitializeLatchWaitSet(), InitializeWaitEventSupport(), InitProcessGlobals(), InitProcessLocalLatch(), IsPostmasterEnvironment, my_exec_path, MyBackendType, pgwin32_signal_initialize(), pkglib_path, and pqinitmask().

Referenced by BootstrapModeMain(), and PostgresSingleUserMain().

◆ InLocalUserIdChange()

bool InLocalUserIdChange ( void )

Definition at line 631 of file miscinit.c.

{
    return (SecurityRestrictionContext & SECURITY_LOCAL_USERID_CHANGE) != 0;
}

References SECURITY_LOCAL_USERID_CHANGE, and SecurityRestrictionContext.

Referenced by GetUserIdAndContext(), and set_config_with_handle().

◆ InNoForceRLSOperation()

bool InNoForceRLSOperation ( void )

Definition at line 649 of file miscinit.c.

{
    return (SecurityRestrictionContext & SECURITY_NOFORCE_RLS) != 0;
}

References SECURITY_NOFORCE_RLS, and SecurityRestrictionContext.

Referenced by check_enable_rls().

◆ InSecurityRestrictedOperation()

bool InSecurityRestrictedOperation ( void )

Definition at line 640 of file miscinit.c.

{
    return (SecurityRestrictionContext & SECURITY_RESTRICTED_OPERATION) != 0;
}

References SECURITY_RESTRICTED_OPERATION, and SecurityRestrictionContext.

Referenced by afterTriggerMarkEvents(), CheckRestrictedOperation(), DefineRelation(), PerformCursorOpen(), set_config_with_handle(), and SetUserIdAndContext().

◆ load_libraries()

static void load_libraries	(	const char *	libraries,
		const char *	gucname,
		bool	restricted
	)

static

Definition at line 1800 of file miscinit.c.

{
    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 filename paths */
    if (!SplitDirectoriesString(rawstring, ',', &elemlist))
    {
        /* syntax error in list */
        list_free_deep(elemlist);
        pfree(rawstring);
        ereport(LOG,
                (errcode(ERRCODE_SYNTAX_ERROR),
                 errmsg("invalid list syntax in parameter \"%s\"",
                        gucname)));
        return;
    }
 
    foreach(l, elemlist)
    {
        /* Note that filename was already canonicalized */
        char       *filename = (char *) lfirst(l);
        char       *expanded = NULL;
 
        /* If restricting, insert $libdir/plugins if not mentioned already */
        if (restricted && first_dir_separator(filename) == NULL)
        {
            expanded = psprintf("$libdir/plugins/%s", filename);
            filename = expanded;
        }
        load_file(filename, restricted);
        ereport(DEBUG1,
                (errmsg_internal("loaded library \"%s\"", filename)));
        if (expanded)
            pfree(expanded);
    }
 
    list_free_deep(elemlist);
    pfree(rawstring);
}

References DEBUG1, ereport, errcode(), errmsg, errmsg_internal(), fb(), filename, first_dir_separator(), lfirst, list_free_deep(), load_file(), LOG, pfree(), psprintf(), pstrdup(), restricted, and SplitDirectoriesString().

Referenced by process_session_preload_libraries(), and process_shared_preload_libraries().

◆ pg_bindtextdomain()

void pg_bindtextdomain ( const char * domain )

Definition at line 1889 of file miscinit.c.

{
#ifdef ENABLE_NLS
    if (my_exec_path[0] != '\0')
    {
        char        locale_path[MAXPGPATH];
 
        get_locale_path(my_exec_path, locale_path);
        bindtextdomain(domain, locale_path);
        pg_bind_textdomain_codeset(domain);
    }
#endif
}

References fb(), get_locale_path(), MAXPGPATH, and my_exec_path.

Referenced by _PG_init(), and test_translation().

◆ process_session_preload_libraries()

void process_session_preload_libraries ( void )

Definition at line 1866 of file miscinit.c.

{
    load_libraries(session_preload_libraries_string,
                   "session_preload_libraries",
                   false);
    load_libraries(local_preload_libraries_string,
                   "local_preload_libraries",
                   true);
}

References load_libraries(), local_preload_libraries_string, and session_preload_libraries_string.

Referenced by InitPostgres().

◆ process_shared_preload_libraries()

void process_shared_preload_libraries ( void )

Definition at line 1852 of file miscinit.c.

{
    process_shared_preload_libraries_in_progress = true;
    load_libraries(shared_preload_libraries_string,
                   "shared_preload_libraries",
                   false);
    process_shared_preload_libraries_in_progress = false;
    process_shared_preload_libraries_done = true;
}

References load_libraries(), process_shared_preload_libraries_done, process_shared_preload_libraries_in_progress, and shared_preload_libraries_string.

Referenced by PostgresSingleUserMain(), and PostmasterMain().

◆ process_shmem_requests()

void process_shmem_requests ( void )

Definition at line 1880 of file miscinit.c.

{
    process_shmem_requests_in_progress = true;
    if (shmem_request_hook)
        shmem_request_hook();
    process_shmem_requests_in_progress = false;
}

References process_shmem_requests_in_progress, and shmem_request_hook.

Referenced by PostgresSingleUserMain(), and PostmasterMain().

◆ RecheckDataDirLockFile()

bool RecheckDataDirLockFile ( void )

Definition at line 1647 of file miscinit.c.

{
    int         fd;
    int         len;
    long        file_pid;
    char        buffer[BLCKSZ];
 
    fd = open(DIRECTORY_LOCK_FILE, O_RDWR | PG_BINARY, 0);
    if (fd < 0)
    {
        /*
         * There are many foreseeable false-positive error conditions.  For
         * safety, fail only on enumerated clearly-something-is-wrong
         * conditions.
         */
        switch (errno)
        {
            case ENOENT:
            case ENOTDIR:
                /* disaster */
                ereport(LOG,
                        (errcode_for_file_access(),
                         errmsg("could not open file \"%s\": %m",
                                DIRECTORY_LOCK_FILE)));
                return false;
            default:
                /* non-fatal, at least for now */
                ereport(LOG,
                        (errcode_for_file_access(),
                         errmsg("could not open file \"%s\": %m; continuing anyway",
                                DIRECTORY_LOCK_FILE)));
                return true;
        }
    }
    pgstat_report_wait_start(WAIT_EVENT_LOCK_FILE_RECHECKDATADIR_READ);
    len = read(fd, buffer, sizeof(buffer) - 1);
    pgstat_report_wait_end();
    if (len < 0)
    {
        ereport(LOG,
                (errcode_for_file_access(),
                 errmsg("could not read from file \"%s\": %m",
                        DIRECTORY_LOCK_FILE)));
        close(fd);
        return true;            /* treat read failure as nonfatal */
    }
    buffer[len] = '\0';
    close(fd);
    file_pid = atol(buffer);
    if (file_pid == getpid())
        return true;            /* all is well */
 
    /* Trouble: someone's overwritten the lock file */
    ereport(LOG,
            (errmsg("lock file \"%s\" contains wrong PID: %ld instead of %ld",
                    DIRECTORY_LOCK_FILE, file_pid, (long) getpid())));
    return false;
}

References close, DIRECTORY_LOCK_FILE, ereport, errcode_for_file_access(), errmsg, fb(), fd(), len, LOG, PG_BINARY, pgstat_report_wait_end(), pgstat_report_wait_start(), and read.

Referenced by ServerLoop().

◆ RestoreClientConnectionInfo()

void RestoreClientConnectionInfo ( char * conninfo )

Definition at line 1085 of file miscinit.c.

{
    SerializedClientConnectionInfo serialized;
 
    memcpy(&serialized, conninfo, sizeof(serialized));
 
    /* Copy the fields back into place */
    MyClientConnectionInfo.authn_id = NULL;
    MyClientConnectionInfo.auth_method = serialized.auth_method;
 
    if (serialized.authn_id_len >= 0)
    {
        char       *authn_id;
 
        authn_id = conninfo + sizeof(serialized);
        MyClientConnectionInfo.authn_id = MemoryContextStrdup(TopMemoryContext,
                                                              authn_id);
    }
}

References ClientConnectionInfo::auth_method, ClientConnectionInfo::authn_id, authn_id, fb(), MemoryContextStrdup(), MyClientConnectionInfo, and TopMemoryContext.

Referenced by ParallelWorkerMain().

◆ SerializeClientConnectionInfo()

void SerializeClientConnectionInfo	(	Size maxsize	PG_USED_FOR_ASSERTS_ONLY,
		char *	start_address
	)

Definition at line 1052 of file miscinit.c.

{
    SerializedClientConnectionInfo serialized = {0};
 
    serialized.authn_id_len = -1;
    serialized.auth_method = MyClientConnectionInfo.auth_method;
 
    if (MyClientConnectionInfo.authn_id)
        serialized.authn_id_len = strlen(MyClientConnectionInfo.authn_id);
 
    /* Copy serialized representation to buffer */
    Assert(maxsize >= sizeof(serialized));
    memcpy(start_address, &serialized, sizeof(serialized));
 
    maxsize -= sizeof(serialized);
    start_address += sizeof(serialized);
 
    /* Copy authn_id into the space after the struct */
    if (serialized.authn_id_len >= 0)
    {
        Assert(maxsize >= (serialized.authn_id_len + 1));
        memcpy(start_address,
               MyClientConnectionInfo.authn_id,
        /* include the NULL terminator to ease deserialization */
               serialized.authn_id_len + 1);
    }
}

References Assert, ClientConnectionInfo::auth_method, ClientConnectionInfo::authn_id, SerializedClientConnectionInfo::authn_id_len, fb(), and MyClientConnectionInfo.

Referenced by InitializeParallelDSM().

◆ SetAuthenticatedUserId()

void SetAuthenticatedUserId ( Oid userid )

Definition at line 553 of file miscinit.c.

{
    Assert(OidIsValid(userid));
 
    /* call only once */
    Assert(!OidIsValid(AuthenticatedUserId));
 
    AuthenticatedUserId = userid;
 
    /* Also mark our PGPROC entry with the authenticated user id */
    /* (We assume this is an atomic store so no lock is needed) */
    MyProc->roleId = userid;
}

References Assert, AuthenticatedUserId, MyProc, OidIsValid, and PGPROC::roleId.

Referenced by InitializeSessionUserId(), and ParallelWorkerMain().

◆ SetCurrentRoleId()

void SetCurrentRoleId	(	Oid	roleid,
		bool	is_superuser
	)

Definition at line 957 of file miscinit.c.

{
    /*
     * Get correct info if it's SET ROLE NONE
     *
     * If SessionUserId hasn't been set yet, do nothing beyond updating
     * SetRoleIsActive --- the eventual SetSessionAuthorization call will
     * update the derived state.  This is needed since we will get called
     * during GUC initialization.
     */
    if (!OidIsValid(roleid))
    {
        SetRoleIsActive = false;
 
        if (!OidIsValid(SessionUserId))
            return;
 
        roleid = SessionUserId;
        is_superuser = SessionUserIsSuperuser;
    }
    else
        SetRoleIsActive = true;
 
    SetOuterUserId(roleid, is_superuser);
}

References is_superuser(), OidIsValid, SessionUserId, SessionUserIsSuperuser, SetOuterUserId(), and SetRoleIsActive.

Referenced by assign_role(), InitializeSessionUserIdStandalone(), and ParallelWorkerMain().

◆ SetDatabasePath()

void SetDatabasePath ( const char * path )

Definition at line 284 of file miscinit.c.

{
    /* This should happen only once per process */
    Assert(!DatabasePath);
    DatabasePath = MemoryContextStrdup(TopMemoryContext, path);
}

References Assert, DatabasePath, MemoryContextStrdup(), and TopMemoryContext.

Referenced by InitPostgres().

◆ SetDataDir()

void SetDataDir ( const char * dir )

Definition at line 390 of file miscinit.c.

{
    char       *new;
 
    Assert(dir);
 
    /* If presented path is relative, convert to absolute */
    new = make_absolute_path(dir);
 
    free(DataDir);
    DataDir = new;
}

References Assert, DataDir, free, and make_absolute_path().

Referenced by SelectConfigFiles().

◆ SetOuterUserId()

static void SetOuterUserId	(	Oid	userid,
		bool	is_superuser
	)

static

Definition at line 489 of file miscinit.c.

{
    Assert(SecurityRestrictionContext == 0);
    Assert(OidIsValid(userid));
    OuterUserId = userid;
 
    /* We force the effective user ID to match, too */
    CurrentUserId = userid;
 
    /* Also update the is_superuser GUC to match OuterUserId's property */
    SetConfigOption("is_superuser",
                    is_superuser ? "on" : "off",
                    PGC_INTERNAL, PGC_S_DYNAMIC_DEFAULT);
}

References Assert, CurrentUserId, is_superuser(), OidIsValid, OuterUserId, PGC_INTERNAL, PGC_S_DYNAMIC_DEFAULT, SecurityRestrictionContext, and SetConfigOption().

Referenced by SetCurrentRoleId(), and SetSessionAuthorization().

◆ SetSessionAuthorization()

void SetSessionAuthorization	(	Oid	userid,
		bool	is_superuser
	)

Definition at line 921 of file miscinit.c.

{
    SetSessionUserId(userid, is_superuser);
 
    if (!SetRoleIsActive)
        SetOuterUserId(userid, is_superuser);
}

References is_superuser(), SetOuterUserId(), SetRoleIsActive, and SetSessionUserId().

Referenced by assign_session_authorization(), InitializeSessionUserIdStandalone(), and ParallelWorkerMain().

◆ SetSessionUserId()

static void SetSessionUserId	(	Oid	userid,
		bool	is_superuser
	)

static

Definition at line 523 of file miscinit.c.

{
    Assert(SecurityRestrictionContext == 0);
    Assert(OidIsValid(userid));
    SessionUserId = userid;
    SessionUserIsSuperuser = is_superuser;
}

References Assert, is_superuser(), OidIsValid, SecurityRestrictionContext, SessionUserId, and SessionUserIsSuperuser.

Referenced by SetSessionAuthorization().

◆ SetUserIdAndContext()

void SetUserIdAndContext	(	Oid	userid,
		bool	sec_def_context
	)

Definition at line 669 of file miscinit.c.

{
    /* We throw the same error SET ROLE would. */
    if (InSecurityRestrictedOperation())
        ereport(ERROR,
                (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
                 errmsg("cannot set parameter \"%s\" within security-restricted operation",
                        "role")));
    CurrentUserId = userid;
    if (sec_def_context)
        SecurityRestrictionContext |= SECURITY_LOCAL_USERID_CHANGE;
    else
        SecurityRestrictionContext &= ~SECURITY_LOCAL_USERID_CHANGE;
}

References CurrentUserId, ereport, errcode(), errmsg, ERROR, fb(), InSecurityRestrictedOperation(), SECURITY_LOCAL_USERID_CHANGE, and SecurityRestrictionContext.

◆ SetUserIdAndSecContext()

void SetUserIdAndSecContext	(	Oid	userid,
		int	sec_context
	)

Definition at line 620 of file miscinit.c.

{
    CurrentUserId = userid;
    SecurityRestrictionContext = sec_context;
}

References CurrentUserId, and SecurityRestrictionContext.

Referenced by AbortSubTransaction(), AbortTransaction(), AfterTriggerExecute(), amcheck_lock_relation_and_check(), ATExecMergePartitions(), ATExecSplitPartition(), brin_summarize_range(), cluster_rel(), ComputeIndexAttrs(), CreateSchemaCommand(), DefineIndex(), do_analyze_rel(), execute_extension_script(), fmgr_security_definer(), index_build(), index_concurrently_build(), ParallelWorkerMain(), refresh_by_match_merge(), RefreshMatViewByOid(), reindex_index(), ReindexRelationConcurrently(), RestoreUserContext(), ri_PerformCheck(), ri_PlanCheck(), SwitchToUntrustedUser(), vacuum_rel(), and validate_index().

◆ SwitchBackToLocalLatch()

void SwitchBackToLocalLatch ( void )

Definition at line 243 of file miscinit.c.

{
    Assert(MyLatch != &LocalLatchData);
    Assert(MyProc != NULL && MyLatch == &MyProc->procLatch);
 
    MyLatch = &LocalLatchData;
 
    if (FeBeWaitSet)
        ModifyWaitEvent(FeBeWaitSet, FeBeWaitSetLatchPos, WL_LATCH_SET,
                        MyLatch);
 
    SetLatch(MyLatch);
}

References Assert, fb(), FeBeWaitSet, FeBeWaitSetLatchPos, LocalLatchData, ModifyWaitEvent(), MyLatch, MyProc, PGPROC::procLatch, SetLatch(), and WL_LATCH_SET.

Referenced by AuxiliaryProcKill(), and ProcKill().

◆ SwitchToSharedLatch()

void SwitchToSharedLatch ( void )

Definition at line 216 of file miscinit.c.

{
    Assert(MyLatch == &LocalLatchData);
    Assert(MyProc != NULL);
 
    MyLatch = &MyProc->procLatch;
 
    if (FeBeWaitSet)
        ModifyWaitEvent(FeBeWaitSet, FeBeWaitSetLatchPos, WL_LATCH_SET,
                        MyLatch);
 
    /*
     * Set the shared latch as the local one might have been set. This
     * shouldn't normally be necessary as code is supposed to check the
     * condition before waiting for the latch, but a bit care can't hurt.
     */
    SetLatch(MyLatch);
}

References Assert, fb(), FeBeWaitSet, FeBeWaitSetLatchPos, LocalLatchData, ModifyWaitEvent(), MyLatch, MyProc, PGPROC::procLatch, SetLatch(), and WL_LATCH_SET.

Referenced by InitAuxiliaryProcess(), and InitProcess().

◆ system_user()

Datum system_user ( PG_FUNCTION_ARGS )

Definition at line 899 of file miscinit.c.

{
    const char *sysuser = GetSystemUser();
 
    if (sysuser)
        PG_RETURN_DATUM(CStringGetTextDatum(sysuser));
    else
        PG_RETURN_NULL();
}

References CStringGetTextDatum, fb(), GetSystemUser(), PG_RETURN_DATUM, and PG_RETURN_NULL.

Referenced by check_ident_usermap(), check_usermap(), and InitializeSystemUser().

◆ TouchSocketLockFiles()

void TouchSocketLockFiles ( void )

Definition at line 1491 of file miscinit.c.

{
    ListCell   *l;
 
    foreach(l, lock_files)
    {
        char       *socketLockFile = (char *) lfirst(l);
 
        /* No need to touch the data directory lock file, we trust */
        if (strcmp(socketLockFile, DIRECTORY_LOCK_FILE) == 0)
            continue;
 
        /* we just ignore any error here */
        (void) utime(socketLockFile, NULL);
    }
}

References DIRECTORY_LOCK_FILE, fb(), lfirst, and lock_files.

Referenced by ServerLoop().

◆ UnlinkLockFiles()

static void UnlinkLockFiles	(	int	status,
		Datum	arg
	)

static

Definition at line 1125 of file miscinit.c.

{
    ListCell   *l;
 
    foreach(l, lock_files)
    {
        char       *curfile = (char *) lfirst(l);
 
        unlink(curfile);
        /* Should we complain if the unlink fails? */
    }
    /* Since we're about to exit, no need to reclaim storage */
 
    /*
     * Lock file removal should always be the last externally visible action
     * of a postmaster or standalone backend, while we won't come here at all
     * when exiting postmaster child processes.  Therefore, this is a good
     * place to log completion of shutdown.  We could alternatively teach
     * proc_exit() to do it, but that seems uglier.  In a standalone backend,
     * use NOTICE elevel to be less chatty.
     */
    ereport(IsPostmasterEnvironment ? LOG : NOTICE,
            (errmsg("database system is shut down")));
}

References ereport, errmsg, fb(), IsPostmasterEnvironment, lfirst, lock_files, LOG, and NOTICE.

Referenced by CreateLockFile().

◆ ValidatePgVersion()

void ValidatePgVersion ( const char * path )

Definition at line 1719 of file miscinit.c.

{
    char        full_path[MAXPGPATH];
    FILE       *file;
    int         ret;
    long        file_major;
    long        my_major;
    char       *endptr;
    char        file_version_string[64];
    const char *my_version_string = PG_VERSION;
 
    my_major = strtol(my_version_string, &endptr, 10);
 
    snprintf(full_path, sizeof(full_path), "%s/PG_VERSION", path);
 
    file = AllocateFile(full_path, "r");
    if (!file)
    {
        if (errno == ENOENT)
            ereport(FATAL,
                    (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                     errmsg("\"%s\" is not a valid data directory",
                            path),
                     errdetail("File \"%s\" is missing.", full_path)));
        else
            ereport(FATAL,
                    (errcode_for_file_access(),
                     errmsg("could not open file \"%s\": %m", full_path)));
    }
 
    file_version_string[0] = '\0';
    ret = fscanf(file, "%63s", file_version_string);
    file_major = strtol(file_version_string, &endptr, 10);
 
    if (ret != 1 || endptr == file_version_string)
        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 might need to initdb.")));
 
    FreeFile(file);
 
    if (my_major != file_major)
        ereport(FATAL,
                (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                 errmsg("database files are incompatible with server"),
                 errdetail("The data directory was initialized by PostgreSQL version %s, "
                           "which is not compatible with this version %s.",
                           file_version_string, my_version_string)));
}

References AllocateFile(), ereport, errcode(), errcode_for_file_access(), errdetail(), errhint(), errmsg, FATAL, fb(), FreeFile(), MAXPGPATH, and snprintf.

Referenced by checkDataDir(), and InitPostgres().

Variable Documentation

◆ AuthenticatedUserId

Oid AuthenticatedUserId = InvalidOid

static

Definition at line 450 of file miscinit.c.

Referenced by GetAuthenticatedUserId(), InitializeSessionUserIdStandalone(), and SetAuthenticatedUserId().

◆ CurrentUserId

Oid CurrentUserId = InvalidOid

static

Definition at line 453 of file miscinit.c.

Referenced by GetUserId(), GetUserIdAndContext(), GetUserIdAndSecContext(), SetOuterUserId(), SetUserIdAndContext(), and SetUserIdAndSecContext().

◆ IgnoreSystemIndexes

bool IgnoreSystemIndexes = false

Definition at line 82 of file miscinit.c.

Referenced by AuxiliaryProcessMainCommon(), BootstrapModeMain(), get_relation_info(), systable_beginscan(), and systable_beginscan_ordered().

◆ local_preload_libraries_string

char* local_preload_libraries_string = NULL

Definition at line 1784 of file miscinit.c.

Referenced by process_session_preload_libraries().

◆ LocalLatchData

Latch LocalLatchData

static

Definition at line 70 of file miscinit.c.

Referenced by InitProcessLocalLatch(), SwitchBackToLocalLatch(), and SwitchToSharedLatch().

◆ lock_files

List* lock_files = NIL

static

Definition at line 68 of file miscinit.c.

Referenced by CreateLockFile(), TouchSocketLockFiles(), and UnlinkLockFiles().

◆ Mode

ProcessingMode Mode = InitProcessing

Definition at line 63 of file miscinit.c.

◆ MyBackendType

◆ MyClientConnectionInfo

ClientConnectionInfo MyClientConnectionInfo

Definition at line 1019 of file miscinit.c.

Referenced by auth_peer(), ClientAuthentication(), EstimateClientConnectionInfoSpace(), InitPostgres(), ParallelWorkerMain(), RestoreClientConnectionInfo(), SerializeClientConnectionInfo(), set_authn_id(), and validate().

◆ OuterUserId

Oid OuterUserId = InvalidOid

static

Definition at line 452 of file miscinit.c.

Referenced by GetCurrentRoleId(), GetOuterUserId(), and SetOuterUserId().

◆ process_shared_preload_libraries_done

bool process_shared_preload_libraries_done = false

Definition at line 1788 of file miscinit.c.

Referenced by check_wal_consistency_checking(), InitializeWalConsistencyChecking(), and process_shared_preload_libraries().

◆ process_shared_preload_libraries_in_progress

bool process_shared_preload_libraries_in_progress = false

Definition at line 1787 of file miscinit.c.

Referenced by _PG_init(), apw_start_leader_worker(), init_custom_variable(), pgstat_register_kind(), process_shared_preload_libraries(), RegisterBackgroundWorker(), and RegisterCustomRmgr().

◆ process_shmem_requests_in_progress

bool process_shmem_requests_in_progress = false

Definition at line 1791 of file miscinit.c.

Referenced by process_shmem_requests(), RequestAddinShmemSpace(), and RequestNamedLWLockTranche().

◆ SecurityRestrictionContext

int SecurityRestrictionContext = 0

static

Definition at line 459 of file miscinit.c.

Referenced by GetUserIdAndSecContext(), InLocalUserIdChange(), InNoForceRLSOperation(), InSecurityRestrictedOperation(), SetOuterUserId(), SetSessionUserId(), SetUserIdAndContext(), and SetUserIdAndSecContext().

◆ session_preload_libraries_string

char* session_preload_libraries_string = NULL

Definition at line 1782 of file miscinit.c.

Referenced by process_session_preload_libraries().

◆ SessionUserId

Oid SessionUserId = InvalidOid

static

Definition at line 451 of file miscinit.c.

Referenced by GetSessionUserId(), GetSessionUserIsSuperuser(), SetCurrentRoleId(), and SetSessionUserId().

◆ SessionUserIsSuperuser

bool SessionUserIsSuperuser = false

static

Definition at line 457 of file miscinit.c.

Referenced by GetSessionUserIsSuperuser(), SetCurrentRoleId(), and SetSessionUserId().

◆ SetRoleIsActive

bool SetRoleIsActive = false

static

Definition at line 462 of file miscinit.c.

Referenced by GetCurrentRoleId(), SetCurrentRoleId(), and SetSessionAuthorization().

◆ shared_preload_libraries_string

char* shared_preload_libraries_string = NULL

Definition at line 1783 of file miscinit.c.

Referenced by process_shared_preload_libraries().

◆ shmem_request_hook

shmem_request_hook_type shmem_request_hook = NULL

Definition at line 1790 of file miscinit.c.

Referenced by _PG_init(), and process_shmem_requests().

◆ SystemUser

const char* SystemUser = NULL

static

Definition at line 454 of file miscinit.c.

Referenced by GetSystemUser(), and InitializeSystemUser().

Data Structures

Macros

Typedefs

Functions

Variables

Macro Definition Documentation

◆ DIRECTORY_LOCK_FILE

◆ PG_PROCTYPE

Typedef Documentation

◆ SerializedClientConnectionInfo

Function Documentation

◆ AddToDataDirLockFile()

◆ ChangeToDataDir()

◆ checkDataDir()

◆ CreateDataDirLockFile()

◆ CreateLockFile()

◆ CreateSocketLockFile()

◆ EstimateClientConnectionInfoSpace()

◆ GetAuthenticatedUserId()

◆ GetBackendTypeDesc()

◆ GetCurrentRoleId()

◆ GetOuterUserId()

◆ GetSessionUserId()

◆ GetSessionUserIsSuperuser()

◆ GetSystemUser()

◆ GetUserId()

◆ GetUserIdAndContext()

◆ GetUserIdAndSecContext()

◆ GetUserNameFromId()

◆ has_rolreplication()

◆ InitializeSessionUserId()

◆ InitializeSessionUserIdStandalone()

◆ InitializeSystemUser()

◆ InitPostmasterChild()

◆ InitProcessLocalLatch()

◆ InitStandaloneProcess()

◆ InLocalUserIdChange()

◆ InNoForceRLSOperation()

◆ InSecurityRestrictedOperation()

◆ load_libraries()

◆ pg_bindtextdomain()

◆ process_session_preload_libraries()

◆ process_shared_preload_libraries()

◆ process_shmem_requests()

◆ RecheckDataDirLockFile()

◆ RestoreClientConnectionInfo()

◆ SerializeClientConnectionInfo()

◆ SetAuthenticatedUserId()

◆ SetCurrentRoleId()

◆ SetDatabasePath()

◆ SetDataDir()

◆ SetOuterUserId()

◆ SetSessionAuthorization()

◆ SetSessionUserId()

◆ SetUserIdAndContext()

◆ SetUserIdAndSecContext()

◆ SwitchBackToLocalLatch()

◆ SwitchToSharedLatch()

◆ system_user()

◆ TouchSocketLockFiles()

◆ UnlinkLockFiles()

◆ ValidatePgVersion()

Variable Documentation

◆ AuthenticatedUserId

◆ CurrentUserId

◆ IgnoreSystemIndexes

◆ local_preload_libraries_string

◆ LocalLatchData

◆ lock_files

◆ Mode

◆ MyBackendType

◆ MyClientConnectionInfo

◆ OuterUserId

◆ process_shared_preload_libraries_done

◆ process_shared_preload_libraries_in_progress

◆ process_shmem_requests_in_progress

◆ SecurityRestrictionContext

◆ session_preload_libraries_string

◆ SessionUserId

◆ SessionUserIsSuperuser