PostgreSQL Source Code git master
Data Structures | Macros | Typedefs | Functions | Variables
miscinit.c File Reference
#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 "postmaster/proctypelist.h"
Include dependency graph for miscinit.c:

Go to the source code of this file.

Data Structures

struct   SerializedClientConnectionInfo
 

Macros

#define  DIRECTORY_LOCK_FILE   "postmaster.pid"
 
#define  PG_PROCTYPE(bktype, 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 60 of file miscinit.c.

◆ PG_PROCTYPE

#define PG_PROCTYPE (   bktype,
  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 1519 of file miscinit.c.

1520{
1521 int fd;
1522 int len;
1523 int lineno;
1524 char *srcptr;
1525 char *destptr;
1526 char srcbuffer[BLCKSZ];
1527 char destbuffer[BLCKSZ];
1528
1529 fd = open(DIRECTORY_LOCK_FILE, O_RDWR | PG_BINARY, 0);
1530 if (fd < 0)
1531 {
1532 ereport(LOG,
1534 errmsg("could not open file \"%s\": %m",
1536 return;
1537 }
1538 pgstat_report_wait_start(WAIT_EVENT_LOCK_FILE_ADDTODATADIR_READ);
1539 len = read(fd, srcbuffer, sizeof(srcbuffer) - 1);
1541 if (len < 0)
1542 {
1543 ereport(LOG,
1545 errmsg("could not read from file \"%s\": %m",
1547 close(fd);
1548 return;
1549 }
1550 srcbuffer[len] = '0円';
1551
1552 /*
1553 * Advance over lines we are not supposed to rewrite, then copy them to
1554 * destbuffer.
1555 */
1556 srcptr = srcbuffer;
1557 for (lineno = 1; lineno < target_line; lineno++)
1558 {
1559 char *eol = strchr(srcptr, '\n');
1560
1561 if (eol == NULL)
1562 break; /* not enough lines in file yet */
1563 srcptr = eol + 1;
1564 }
1565 memcpy(destbuffer, srcbuffer, srcptr - srcbuffer);
1566 destptr = destbuffer + (srcptr - srcbuffer);
1567
1568 /*
1569 * Fill in any missing lines before the target line, in case lines are
1570 * added to the file out of order.
1571 */
1572 for (; lineno < target_line; lineno++)
1573 {
1574 if (destptr < destbuffer + sizeof(destbuffer))
1575 *destptr++ = '\n';
1576 }
1577
1578 /*
1579 * Write or rewrite the target line.
1580 */
1581 snprintf(destptr, destbuffer + sizeof(destbuffer) - destptr, "%s\n", str);
1582 destptr += strlen(destptr);
1583
1584 /*
1585 * If there are more lines in the old file, append them to destbuffer.
1586 */
1587 if ((srcptr = strchr(srcptr, '\n')) != NULL)
1588 {
1589 srcptr++;
1590 snprintf(destptr, destbuffer + sizeof(destbuffer) - destptr, "%s",
1591 srcptr);
1592 }
1593
1594 /*
1595 * And rewrite the data. Since we write in a single kernel call, this
1596 * update should appear atomic to onlookers.
1597 */
1598 len = strlen(destbuffer);
1599 errno = 0;
1600 pgstat_report_wait_start(WAIT_EVENT_LOCK_FILE_ADDTODATADIR_WRITE);
1601 if (pg_pwrite(fd, destbuffer, len, 0) != len)
1602 {
1604 /* if write didn't set errno, assume problem is no disk space */
1605 if (errno == 0)
1606 errno = ENOSPC;
1607 ereport(LOG,
1609 errmsg("could not write to file \"%s\": %m",
1611 close(fd);
1612 return;
1613 }
1615 pgstat_report_wait_start(WAIT_EVENT_LOCK_FILE_ADDTODATADIR_SYNC);
1616 if (pg_fsync(fd) != 0)
1617 {
1618 ereport(LOG,
1620 errmsg("could not write to file \"%s\": %m",
1622 }
1624 if (close(fd) != 0)
1625 {
1626 ereport(LOG,
1628 errmsg("could not write to file \"%s\": %m",
1630 }
1631}
#define PG_BINARY
Definition: c.h:1272
int errcode_for_file_access(void)
Definition: elog.c:877
int errmsg(const char *fmt,...)
Definition: elog.c:1071
#define LOG
Definition: elog.h:31
#define ereport(elevel,...)
Definition: elog.h:150
int pg_fsync(int fd)
Definition: fd.c:386
const char * str
#define close(a)
Definition: win32.h:12
#define read(a, b, c)
Definition: win32.h:13
#define DIRECTORY_LOCK_FILE
Definition: miscinit.c:60
const void size_t len
#define pg_pwrite
Definition: port.h:227
#define snprintf
Definition: port.h:239
static int fd(const char *x, int i)
Definition: preproc-init.c:105
static void pgstat_report_wait_start(uint32 wait_event_info)
Definition: wait_event.h:69
static void pgstat_report_wait_end(void)
Definition: wait_event.h:85

References close, DIRECTORY_LOCK_FILE, ereport, errcode_for_file_access(), errmsg(), 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 409 of file miscinit.c.

410{
412
413 if (chdir(DataDir) < 0)
416 errmsg("could not change directory to \"%s\": %m",
417 DataDir)));
418}
#define FATAL
Definition: elog.h:41
char * DataDir
Definition: globals.c:71
Assert(PointerIsAligned(start, uint64))

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

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

◆ checkDataDir()

void checkDataDir ( void  )

Definition at line 296 of file miscinit.c.

297{
298 struct stat stat_buf;
299
301
302 if (stat(DataDir, &stat_buf) != 0)
303 {
304 if (errno == ENOENT)
307 errmsg("data directory \"%s\" does not exist",
308 DataDir)));
309 else
312 errmsg("could not read permissions of directory \"%s\": %m",
313 DataDir)));
314 }
315
316 /* eventual chdir would fail anyway, but let's test ... */
317 if (!S_ISDIR(stat_buf.st_mode))
319 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
320 errmsg("specified data directory \"%s\" is not a directory",
321 DataDir)));
322
323 /*
324 * Check that the directory belongs to my userid; if not, reject.
325 *
326 * This check is an essential part of the interlock that prevents two
327 * postmasters from starting in the same directory (see CreateLockFile()).
328 * Do not remove or weaken it.
329 *
330 * XXX can we safely enable this check on Windows?
331 */
332#if !defined(WIN32) && !defined(__CYGWIN__)
333 if (stat_buf.st_uid != geteuid())
335 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
336 errmsg("data directory \"%s\" has wrong ownership",
337 DataDir),
338 errhint("The server must be started by the user that owns the data directory.")));
339#endif
340
341 /*
342 * Check if the directory has correct permissions. If not, reject.
343 *
344 * Only two possible modes are allowed, 0700 and 0750. The latter mode
345 * indicates that group read/execute should be allowed on all newly
346 * created files and directories.
347 *
348 * XXX temporarily suppress check when on Windows, because there may not
349 * be proper support for Unix-y file permissions. Need to think of a
350 * reasonable check to apply on Windows.
351 */
352#if !defined(WIN32) && !defined(__CYGWIN__)
353 if (stat_buf.st_mode & PG_MODE_MASK_GROUP)
355 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
356 errmsg("data directory \"%s\" has invalid permissions",
357 DataDir),
358 errdetail("Permissions should be u=rwx (0700) or u=rwx,g=rx (0750).")));
359#endif
360
361 /*
362 * Reset creation modes and mask based on the mode of the data directory.
363 *
364 * The mask was set earlier in startup to disallow group permissions on
365 * newly created files and directories. However, if group read/execute
366 * are present on the data directory then modify the create modes and mask
367 * to allow group read/execute on newly created files and directories and
368 * set the data_directory_mode GUC.
369 *
370 * Suppress when on Windows, because there may not be proper support for
371 * Unix-y file permissions.
372 */
373#if !defined(WIN32) && !defined(__CYGWIN__)
374 SetDataDirectoryCreatePerm(stat_buf.st_mode);
375
376 umask(pg_mode_mask);
378#endif
379
380 /* Check for PG_VERSION */
382}
int errdetail(const char *fmt,...)
Definition: elog.c:1207
int errhint(const char *fmt,...)
Definition: elog.c:1321
int errcode(int sqlerrcode)
Definition: elog.c:854
void SetDataDirectoryCreatePerm(int dataDirMode)
Definition: file_perm.c:34
int pg_mode_mask
Definition: file_perm.c:25
int pg_dir_create_mode
Definition: file_perm.c:18
#define PG_MODE_MASK_GROUP
Definition: file_perm.h:29
int data_directory_mode
Definition: globals.c:77
void ValidatePgVersion(const char *path)
Definition: miscinit.c:1718
Definition: win32_port.h:255
#define stat
Definition: win32_port.h:274
#define S_ISDIR(m)
Definition: win32_port.h:315

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

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

◆ CreateDataDirLockFile()

void CreateDataDirLockFile ( bool  amPostmaster )

Definition at line 1463 of file miscinit.c.

1464{
1465 CreateLockFile(DIRECTORY_LOCK_FILE, amPostmaster, "", true, DataDir);
1466}
static void CreateLockFile(const char *filename, bool amPostmaster, const char *socketDir, bool isDDLock, const char *refName)
Definition: miscinit.c:1158

References CreateLockFile(), DataDir, and DIRECTORY_LOCK_FILE.

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 1158 of file miscinit.c.

1161{
1162 int fd;
1163 char buffer[MAXPGPATH * 2 + 256];
1164 int ntries;
1165 int len;
1166 int encoded_pid;
1167 pid_t other_pid;
1168 pid_t my_pid,
1169 my_p_pid,
1170 my_gp_pid;
1171 const char *envvar;
1172
1173 /*
1174 * If the PID in the lockfile is our own PID or our parent's or
1175 * grandparent's PID, then the file must be stale (probably left over from
1176 * a previous system boot cycle). We need to check this because of the
1177 * likelihood that a reboot will assign exactly the same PID as we had in
1178 * the previous reboot, or one that's only one or two counts larger and
1179 * hence the lockfile's PID now refers to an ancestor shell process. We
1180 * allow pg_ctl to pass down its parent shell PID (our grandparent PID)
1181 * via the environment variable PG_GRANDPARENT_PID; this is so that
1182 * launching the postmaster via pg_ctl can be just as reliable as
1183 * launching it directly. There is no provision for detecting
1184 * further-removed ancestor processes, but if the init script is written
1185 * carefully then all but the immediate parent shell will be root-owned
1186 * processes and so the kill test will fail with EPERM. Note that we
1187 * cannot get a false negative this way, because an existing postmaster
1188 * would surely never launch a competing postmaster or pg_ctl process
1189 * directly.
1190 */
1191 my_pid = getpid();
1192
1193#ifndef WIN32
1194 my_p_pid = getppid();
1195#else
1196
1197 /*
1198 * Windows hasn't got getppid(), but doesn't need it since it's not using
1199 * real kill() either...
1200 */
1201 my_p_pid = 0;
1202#endif
1203
1204 envvar = getenv("PG_GRANDPARENT_PID");
1205 if (envvar)
1206 my_gp_pid = atoi(envvar);
1207 else
1208 my_gp_pid = 0;
1209
1210 /*
1211 * We need a loop here because of race conditions. But don't loop forever
1212 * (for example, a non-writable $PGDATA directory might cause a failure
1213 * that won't go away). 100 tries seems like plenty.
1214 */
1215 for (ntries = 0;; ntries++)
1216 {
1217 /*
1218 * Try to create the lock file --- O_EXCL makes this atomic.
1219 *
1220 * Think not to make the file protection weaker than 0600/0640. See
1221 * comments below.
1222 */
1223 fd = open(filename, O_RDWR | O_CREAT | O_EXCL, pg_file_create_mode);
1224 if (fd >= 0)
1225 break; /* Success; exit the retry loop */
1226
1227 /*
1228 * Couldn't create the pid file. Probably it already exists.
1229 */
1230 if ((errno != EEXIST && errno != EACCES) || ntries > 100)
1231 ereport(FATAL,
1233 errmsg("could not create lock file \"%s\": %m",
1234 filename)));
1235
1236 /*
1237 * Read the file to get the old owner's PID. Note race condition
1238 * here: file might have been deleted since we tried to create it.
1239 */
1240 fd = open(filename, O_RDONLY, pg_file_create_mode);
1241 if (fd < 0)
1242 {
1243 if (errno == ENOENT)
1244 continue; /* race condition; try again */
1245 ereport(FATAL,
1247 errmsg("could not open lock file \"%s\": %m",
1248 filename)));
1249 }
1250 pgstat_report_wait_start(WAIT_EVENT_LOCK_FILE_CREATE_READ);
1251 if ((len = read(fd, buffer, sizeof(buffer) - 1)) < 0)
1252 ereport(FATAL,
1254 errmsg("could not read lock file \"%s\": %m",
1255 filename)));
1257 close(fd);
1258
1259 if (len == 0)
1260 {
1261 ereport(FATAL,
1262 (errcode(ERRCODE_LOCK_FILE_EXISTS),
1263 errmsg("lock file \"%s\" is empty", filename),
1264 errhint("Either another server is starting, or the lock file is the remnant of a previous server startup crash.")));
1265 }
1266
1267 buffer[len] = '0円';
1268 encoded_pid = atoi(buffer);
1269
1270 /* if pid < 0, the pid is for postgres, not postmaster */
1271 other_pid = (pid_t) (encoded_pid < 0 ? -encoded_pid : encoded_pid);
1272
1273 if (other_pid <= 0)
1274 elog(FATAL, "bogus data in lock file \"%s\": \"%s\"",
1275 filename, buffer);
1276
1277 /*
1278 * Check to see if the other process still exists
1279 *
1280 * Per discussion above, my_pid, my_p_pid, and my_gp_pid can be
1281 * ignored as false matches.
1282 *
1283 * Normally kill() will fail with ESRCH if the given PID doesn't
1284 * exist.
1285 *
1286 * We can treat the EPERM-error case as okay because that error
1287 * implies that the existing process has a different userid than we
1288 * do, which means it cannot be a competing postmaster. A postmaster
1289 * cannot successfully attach to a data directory owned by a userid
1290 * other than its own, as enforced in checkDataDir(). Also, since we
1291 * create the lockfiles mode 0600/0640, we'd have failed above if the
1292 * lockfile belonged to another userid --- which means that whatever
1293 * process kill() is reporting about isn't the one that made the
1294 * lockfile. (NOTE: this last consideration is the only one that
1295 * keeps us from blowing away a Unix socket file belonging to an
1296 * instance of Postgres being run by someone else, at least on
1297 * machines where /tmp hasn't got a stickybit.)
1298 */
1299 if (other_pid != my_pid && other_pid != my_p_pid &&
1300 other_pid != my_gp_pid)
1301 {
1302 if (kill(other_pid, 0) == 0 ||
1303 (errno != ESRCH && errno != EPERM))
1304 {
1305 /* lockfile belongs to a live process */
1306 ereport(FATAL,
1307 (errcode(ERRCODE_LOCK_FILE_EXISTS),
1308 errmsg("lock file \"%s\" already exists",
1309 filename),
1310 isDDLock ?
1311 (encoded_pid < 0 ?
1312 errhint("Is another postgres (PID %d) running in data directory \"%s\"?",
1313 (int) other_pid, refName) :
1314 errhint("Is another postmaster (PID %d) running in data directory \"%s\"?",
1315 (int) other_pid, refName)) :
1316 (encoded_pid < 0 ?
1317 errhint("Is another postgres (PID %d) using socket file \"%s\"?",
1318 (int) other_pid, refName) :
1319 errhint("Is another postmaster (PID %d) using socket file \"%s\"?",
1320 (int) other_pid, refName))));
1321 }
1322 }
1323
1324 /*
1325 * No, the creating process did not exist. However, it could be that
1326 * the postmaster crashed (or more likely was kill -9'd by a clueless
1327 * admin) but has left orphan backends behind. Check for this by
1328 * looking to see if there is an associated shmem segment that is
1329 * still in use.
1330 *
1331 * Note: because postmaster.pid is written in multiple steps, we might
1332 * not find the shmem ID values in it; we can't treat that as an
1333 * error.
1334 */
1335 if (isDDLock)
1336 {
1337 char *ptr = buffer;
1338 unsigned long id1,
1339 id2;
1340 int lineno;
1341
1342 for (lineno = 1; lineno < LOCK_FILE_LINE_SHMEM_KEY; lineno++)
1343 {
1344 if ((ptr = strchr(ptr, '\n')) == NULL)
1345 break;
1346 ptr++;
1347 }
1348
1349 if (ptr != NULL &&
1350 sscanf(ptr, "%lu %lu", &id1, &id2) == 2)
1351 {
1352 if (PGSharedMemoryIsInUse(id1, id2))
1353 ereport(FATAL,
1354 (errcode(ERRCODE_LOCK_FILE_EXISTS),
1355 errmsg("pre-existing shared memory block (key %lu, ID %lu) is still in use",
1356 id1, id2),
1357 errhint("Terminate any old server processes associated with data directory \"%s\".",
1358 refName)));
1359 }
1360 }
1361
1362 /*
1363 * Looks like nobody's home. Unlink the file and try again to create
1364 * it. Need a loop because of possible race condition against other
1365 * would-be creators.
1366 */
1367 if (unlink(filename) < 0)
1368 ereport(FATAL,
1370 errmsg("could not remove old lock file \"%s\": %m",
1371 filename),
1372 errhint("The file seems accidentally left over, but "
1373 "it could not be removed. Please remove the file "
1374 "by hand and try again.")));
1375 }
1376
1377 /*
1378 * Successfully created the file, now fill it. See comment in pidfile.h
1379 * about the contents. Note that we write the same first five lines into
1380 * both datadir and socket lockfiles; although more stuff may get added to
1381 * the datadir lockfile later.
1382 */
1383 snprintf(buffer, sizeof(buffer), "%d\n%s\n" INT64_FORMAT "\n%d\n%s\n",
1384 amPostmaster ? (int) my_pid : -((int) my_pid),
1385 DataDir,
1388 socketDir);
1389
1390 /*
1391 * In a standalone backend, the next line (LOCK_FILE_LINE_LISTEN_ADDR)
1392 * will never receive data, so fill it in as empty now.
1393 */
1394 if (isDDLock && !amPostmaster)
1395 strlcat(buffer, "\n", sizeof(buffer));
1396
1397 errno = 0;
1398 pgstat_report_wait_start(WAIT_EVENT_LOCK_FILE_CREATE_WRITE);
1399 if (write(fd, buffer, strlen(buffer)) != strlen(buffer))
1400 {
1401 int save_errno = errno;
1402
1403 close(fd);
1404 unlink(filename);
1405 /* if write didn't set errno, assume problem is no disk space */
1406 errno = save_errno ? save_errno : ENOSPC;
1407 ereport(FATAL,
1409 errmsg("could not write lock file \"%s\": %m", filename)));
1410 }
1412
1413 pgstat_report_wait_start(WAIT_EVENT_LOCK_FILE_CREATE_SYNC);
1414 if (pg_fsync(fd) != 0)
1415 {
1416 int save_errno = errno;
1417
1418 close(fd);
1419 unlink(filename);
1420 errno = save_errno;
1421 ereport(FATAL,
1423 errmsg("could not write lock file \"%s\": %m", filename)));
1424 }
1426 if (close(fd) != 0)
1427 {
1428 int save_errno = errno;
1429
1430 unlink(filename);
1431 errno = save_errno;
1432 ereport(FATAL,
1434 errmsg("could not write lock file \"%s\": %m", filename)));
1435 }
1436
1437 /*
1438 * Arrange to unlink the lock file(s) at proc_exit. If this is the first
1439 * one, set up the on_proc_exit function to do it; then add this lock file
1440 * to the list of files to unlink.
1441 */
1442 if (lock_files == NIL)
1444
1445 /*
1446 * Use lcons so that the lock files are unlinked in reverse order of
1447 * creation; this is critical!
1448 */
1450}
#define INT64_FORMAT
Definition: c.h:556
#define elog(elevel,...)
Definition: elog.h:226
int pg_file_create_mode
Definition: file_perm.c:19
pg_time_t MyStartTime
Definition: globals.c:48
#define write(a, b, c)
Definition: win32.h:14
void on_proc_exit(pg_on_exit_callback function, Datum arg)
Definition: ipc.c:309
List * lcons(void *datum, List *list)
Definition: list.c:495
char * pstrdup(const char *in)
Definition: mcxt.c:1759
static List * lock_files
Definition: miscinit.c:67
static void UnlinkLockFiles(int status, Datum arg)
Definition: miscinit.c:1124
#define MAXPGPATH
static char * filename
Definition: pg_dumpall.c:120
#define NIL
Definition: pg_list.h:68
#define LOCK_FILE_LINE_SHMEM_KEY
Definition: pidfile.h:43
size_t strlcat(char *dst, const char *src, size_t siz)
Definition: strlcat.c:33
int PostPortNumber
Definition: postmaster.c:203
bool PGSharedMemoryIsInUse(unsigned long id1, unsigned long id2)
Definition: sysv_shmem.c:317
#define kill(pid, sig)
Definition: win32_port.h:493

References close, DataDir, elog, ereport, errcode(), errcode_for_file_access(), errhint(), errmsg(), FATAL, 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 1472 of file miscinit.c.

1474{
1475 char lockfile[MAXPGPATH];
1476
1477 snprintf(lockfile, sizeof(lockfile), "%s.lock", socketfile);
1478 CreateLockFile(lockfile, amPostmaster, socketDir, false, socketfile);
1479}

References CreateLockFile(), MAXPGPATH, and snprintf.

Referenced by Lock_AF_UNIX().

◆ EstimateClientConnectionInfoSpace()

Size EstimateClientConnectionInfoSpace ( void  )

Definition at line 1035 of file miscinit.c.

1036{
1037 Size size = 0;
1038
1039 size = add_size(size, sizeof(SerializedClientConnectionInfo));
1040
1042 size = add_size(size, strlen(MyClientConnectionInfo.authn_id) + 1);
1043
1044 return size;
1045}
size_t Size
Definition: c.h:610
ClientConnectionInfo MyClientConnectionInfo
Definition: miscinit.c:1018
Size add_size(Size s1, Size s2)
Definition: shmem.c:493
const char * authn_id
Definition: libpq-be.h:99

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

Referenced by InitializeParallelDSM().

◆ GetAuthenticatedUserId()

Oid GetAuthenticatedUserId ( void  )

Definition at line 545 of file miscinit.c.

546{
548 return AuthenticatedUserId;
549}
#define OidIsValid(objectId)
Definition: c.h:774
static Oid AuthenticatedUserId
Definition: miscinit.c:449

References Assert(), AuthenticatedUserId, and OidIsValid.

Referenced by check_session_authorization(), and InitializeParallelDSM().

◆ GetBackendTypeDesc()

const char * GetBackendTypeDesc ( BackendType  backendType )

Definition at line 263 of file miscinit.c.

264{
265 const char *backendDesc = gettext_noop("unknown process type");
266
267 switch (backendType)
268 {
269#define PG_PROCTYPE(bktype, description, main_func, shmem_attach) \
270 case bktype: backendDesc = description; break;
272#undef PG_PROCTYPE
273 }
274 return backendDesc;
275}
#define gettext_noop(x)
Definition: c.h:1195

References 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 935 of file miscinit.c.

936{
937 if (SetRoleIsActive)
938 return OuterUserId;
939 else
940 return InvalidOid;
941}
static Oid OuterUserId
Definition: miscinit.c:451
static bool SetRoleIsActive
Definition: miscinit.c:461
#define InvalidOid
Definition: postgres_ext.h:37

References InvalidOid, OuterUserId, and SetRoleIsActive.

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

◆ GetOuterUserId()

Oid GetOuterUserId ( void  )

Definition at line 480 of file miscinit.c.

481{
483 return OuterUserId;
484}

References Assert(), OidIsValid, and OuterUserId.

Referenced by DropRole(), and RenameRole().

◆ GetSessionUserId()

Oid GetSessionUserId ( void  )

Definition at line 508 of file miscinit.c.

509{
511 return SessionUserId;
512}
static Oid SessionUserId
Definition: miscinit.c:450

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 515 of file miscinit.c.

516{
519}
static bool SessionUserIsSuperuser
Definition: miscinit.c:456

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

Referenced by check_session_authorization(), and InitializeParallelDSM().

◆ GetSystemUser()

const char * GetSystemUser ( void  )

Definition at line 535 of file miscinit.c.

536{
537 return SystemUser;
538}
static const char * SystemUser
Definition: miscinit.c:453

References SystemUser.

Referenced by system_user().

◆ GetUserId()

Oid GetUserId ( void  )

Definition at line 469 of file miscinit.c.

470{
472 return CurrentUserId;
473}
static Oid CurrentUserId
Definition: miscinit.c:452

References Assert(), CurrentUserId, and OidIsValid.

Referenced by AfterTriggerSaveEvent(), AggregateCreate(), all_rows_selectable(), AlterCollation(), AlterDatabase(), AlterDatabaseOwner(), AlterDatabaseRefreshColl(), AlterDatabaseSet(), AlterEventTrigger(), AlterEventTriggerOwner_internal(), AlterExtensionNamespace(), AlterForeignServer(), AlterForeignServerOwner_internal(), AlterFunction(), AlterObjectNamespace_internal(), AlterObjectOwner_internal(), AlterObjectRename_internal(), AlterOperator(), AlterOpFamilyAdd(), AlterPublication(), AlterPublicationOwner_internal(), AlterRole(), AlterRoleSet(), AlterSchemaOwner_internal(), AlterStatistics(), AlterSubscription(), AlterSubscriptionOwner_internal(), AlterSystemSetConfigFile(), AlterTableMoveAll(), AlterTableSpaceOptions(), AlterTSConfiguration(), AlterTSDictionary(), AlterType(), AlterTypeNamespace_oid(), AlterTypeOwner(), ATExecChangeOwner(), ATPrepAlterColumnType(), ATPrepSetTableSpace(), ATSimplePermissions(), bbsink_server_new(), be_lo_unlink(), binary_upgrade_create_empty_extension(), binary_upgrade_logical_slot_has_caught_up(), brin_desummarize_range(), BuildCachedPlan(), BuildDescForRelation(), BuildIndexValueDescription(), calculate_database_size(), calculate_tablespace_size(), call_pltcl_start_proc(), check_enable_rls(), check_search_path(), check_temp_tablespaces(), CheckCachedPlan(), checkDomainOwner(), checkEnumOwner(), checkFkeyPermissions(), CheckFunctionValidatorAccess(), CheckMyDatabase(), CheckSlotPermissions(), CommentObject(), compile_plperl_function(), compile_pltcl_function(), CompleteCachedPlan(), compute_return_type(), ConfigOptionIsVisible(), convert_and_check_filename(), CreateCast(), CreateConversionCommand(), createdb(), CreateEventTrigger(), CreateExtensionInternal(), CreateForeignDataWrapper(), CreateForeignServer(), CreateForeignTable(), CreateFunction(), CreateOpFamily(), CreateProceduralLanguage(), CreatePublication(), CreateRole(), CreateStatistics(), CreateSubscription(), CreateTableSpace(), CreateTransform(), CreateTriggerFiringOn(), current_user(), currtid_internal(), currval_oid(), DefineAggregate(), DefineCollation(), DefineDomain(), DefineEnum(), DefineIndex(), DefineOpClass(), DefineOperator(), DefineOpFamily(), DefineQueryRewrite(), DefineRange(), DefineRelation(), DefineTSConfiguration(), DefineTSDictionary(), DefineType(), do_setval(), DoCopy(), dropdb(), DropOwnedObjects(), DropRole(), DropSubscription(), DropTableSpace(), emit_audit_message(), EnableDisableRule(), ExecAlterDefaultPrivilegesStmt(), ExecAlterExtensionContentsStmt(), ExecAlterExtensionStmt(), ExecAlterObjectDependsStmt(), ExecBuildGroupingEqual(), ExecBuildParamSetEqual(), ExecBuildSlotPartitionKeyDescription(), ExecBuildSlotValueDescription(), ExecCheckOneRelPerms(), ExecCheckpoint(), ExecGetResultRelCheckAsUser(), ExecGrant_Attribute(), ExecGrant_common(), ExecGrant_Largeobject(), ExecGrant_Parameter(), ExecGrant_Relation(), ExecInitAgg(), ExecInitExprRec(), ExecInitFunc(), ExecInitWindowAgg(), ExecReindex(), ExecSecLabelStmt(), execute_extension_script(), ExecuteCallStmt(), ExecuteDoStmt(), ExecuteGrantStmt(), ExecuteTruncateGuts(), extension_is_trusted(), file_fdw_validator(), findRangeCanonicalFunction(), findRangeSubtypeDiffFunction(), FinishPreparedTransaction(), fmgr_security_definer(), get_connect_string(), get_other_operator(), get_rel_from_relname(), get_rolespec_oid(), get_rolespec_tuple(), get_row_security_policies(), get_tables_to_cluster(), get_tables_to_cluster_partitioned(), GetConfigOptionValues(), gin_clean_pending_list(), GrantRole(), HandleFunctionRequest(), has_any_column_privilege_id(), has_any_column_privilege_name(), has_column_privilege_id_attnum(), has_column_privilege_id_name(), has_column_privilege_name_attnum(), has_column_privilege_name_name(), has_database_privilege_id(), has_database_privilege_name(), has_foreign_data_wrapper_privilege_id(), has_foreign_data_wrapper_privilege_name(), has_function_privilege_id(), has_function_privilege_name(), has_language_privilege_id(), has_language_privilege_name(), has_largeobject_privilege_id(), has_parameter_privilege_name(), has_schema_privilege_id(), has_schema_privilege_name(), has_sequence_privilege_id(), has_sequence_privilege_name(), has_server_privilege_id(), has_server_privilege_name(), has_table_privilege_id(), has_table_privilege_name(), has_tablespace_privilege_id(), has_tablespace_privilege_name(), has_type_privilege_id(), has_type_privilege_name(), have_createdb_privilege(), have_createrole_privilege(), heap_force_common(), ImportForeignSchema(), init_sexpr(), InitializeSearchPath(), InitPostgres(), InitTempTableNamespace(), inline_function(), inline_set_returning_function(), insert_username(), interpret_function_parameter_list(), inv_create(), inv_open(), LargeObjectCreate(), lastval(), LockViewRecurse(), LogicalRepSyncTableStart(), lookup_agg_function(), LookupCreationNamespace(), LookupExplicitNamespace(), MergeAttributes(), movedb(), nextval_internal(), OperatorCreate(), OperatorShellMake(), pg_get_sequence_data(), pg_has_role_id(), pg_has_role_name(), pg_import_system_collations(), pg_prewarm(), pg_sequence_last_value(), pg_sequence_parameters(), pg_signal_backend(), pg_stat_get_wal_receiver(), pg_stat_get_wal_senders(), pg_stat_statements_internal(), pgrowlocks(), pgss_store(), pgstat_get_backend_current_activity(), pltcl_fetch_interp(), postgresBeginDirectModify(), postgresBeginForeignScan(), postgresExecForeignTruncate(), postgresGetForeignRelSize(), postgresImportForeignSchema(), PrepareTempTablespaces(), PrepareTransaction(), PublicationAddTables(), RangeVarCallbackForAlterRelation(), RangeVarCallbackForDropRelation(), RangeVarCallbackForLockTable(), RangeVarCallbackForPolicy(), RangeVarCallbackForReindexIndex(), RangeVarCallbackForRenameRule(), RangeVarCallbackForRenameTrigger(), RangeVarCallbackMaintainsTable(), RangeVarCallbackOwnsRelation(), RangeVarGetAndCheckCreationNamespace(), ReassignOwnedObjects(), recomputeNamespacePath(), REGRESS_exec_check_perms(), REGRESS_object_access_hook(), REGRESS_object_access_hook_str(), REGRESS_utility_command(), ReindexMultipleInternal(), ReindexMultipleTables(), RemoveObjects(), renameatt_check(), RenameDatabase(), RenameRole(), RenameSchema(), RenameTableSpace(), RenameType(), RevalidateCachedQuery(), RI_Initial_Check(), ri_ReportViolation(), select_perl_context(), set_config_option(), set_foreign_rel_properties(), shell_check_detail(), stats_lock_check_privileges(), superuser(), TargetPrivilegesCheck(), TerminateOtherDBBackends(), transformTableLikeClause(), truncate_check_perms(), user_mapping_ddl_aclcheck(), vacuum_is_permitted_for_relation(), validate_option_array_item(), ValidateJoinEstimator(), ValidateOperatorReference(), and ValidateRestrictionEstimator().

◆ GetUserIdAndContext()

void GetUserIdAndContext ( Oid *  userid,
bool *  sec_def_context 
)

Definition at line 661 of file miscinit.c.

662{
663 *userid = CurrentUserId;
664 *sec_def_context = InLocalUserIdChange();
665}
bool InLocalUserIdChange(void)
Definition: miscinit.c:630

References CurrentUserId, and InLocalUserIdChange().

◆ GetUserIdAndSecContext()

void GetUserIdAndSecContext ( Oid *  userid,
int *  sec_context 
)

Definition at line 612 of file miscinit.c.

613{
614 *userid = CurrentUserId;
615 *sec_context = SecurityRestrictionContext;
616}
static int SecurityRestrictionContext
Definition: miscinit.c:458

References CurrentUserId, and SecurityRestrictionContext.

Referenced by AfterTriggerExecute(), amcheck_lock_relation_and_check(), 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 988 of file miscinit.c.

989{
990 HeapTuple tuple;
991 char *result;
992
993 tuple = SearchSysCache1(AUTHOID, ObjectIdGetDatum(roleid));
994 if (!HeapTupleIsValid(tuple))
995 {
996 if (!noerr)
998 (errcode(ERRCODE_UNDEFINED_OBJECT),
999 errmsg("invalid role OID: %u", roleid)));
1000 result = NULL;
1001 }
1002 else
1003 {
1004 result = pstrdup(NameStr(((Form_pg_authid) GETSTRUCT(tuple))->rolname));
1005 ReleaseSysCache(tuple);
1006 }
1007 return result;
1008}
#define NameStr(name)
Definition: c.h:751
#define ERROR
Definition: elog.h:39
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
static void * GETSTRUCT(const HeapTupleData *tuple)
Definition: htup_details.h:728
NameData rolname
Definition: pg_authid.h:34
FormData_pg_authid * Form_pg_authid
Definition: pg_authid.h:56
static Datum ObjectIdGetDatum(Oid X)
Definition: postgres.h:262
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:264
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:220

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

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

◆ has_rolreplication()

bool has_rolreplication ( Oid  roleid )

Definition at line 688 of file miscinit.c.

689{
690 bool result = false;
691 HeapTuple utup;
692
693 /* Superusers bypass all permission checking. */
694 if (superuser_arg(roleid))
695 return true;
696
697 utup = SearchSysCache1(AUTHOID, ObjectIdGetDatum(roleid));
698 if (HeapTupleIsValid(utup))
699 {
700 result = ((Form_pg_authid) GETSTRUCT(utup))->rolreplication;
701 ReleaseSysCache(utup);
702 }
703 return result;
704}
bool rolreplication
Definition: pg_authid.h:40
bool superuser_arg(Oid roleid)
Definition: superuser.c:56

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

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

◆ InitializeSessionUserId()

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

Definition at line 710 of file miscinit.c.

712{
713 HeapTuple roleTup;
714 Form_pg_authid rform;
715 char *rname;
716 bool is_superuser;
717
718 /*
719 * In a parallel worker, we don't have to do anything here.
720 * ParallelWorkerMain already set our output variables, and we aren't
721 * going to enforce either rolcanlogin or rolconnlimit. Furthermore, we
722 * don't really want to perform a catalog lookup for the role: we don't
723 * want to fail if it's been dropped.
724 */
726 {
727 Assert(bypass_login_check);
728 return;
729 }
730
731 /*
732 * Don't do scans if we're bootstrapping, none of the system catalogs
733 * exist yet, and they should be owned by postgres anyway.
734 */
736
737 /*
738 * Make sure syscache entries are flushed for recent catalog changes. This
739 * allows us to find roles that were created on-the-fly during
740 * authentication.
741 */
743
744 /*
745 * Look up the role, either by name if that's given or by OID if not.
746 */
747 if (rolename != NULL)
748 {
749 roleTup = SearchSysCache1(AUTHNAME, PointerGetDatum(rolename));
750 if (!HeapTupleIsValid(roleTup))
752 (errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION),
753 errmsg("role \"%s\" does not exist", rolename)));
754 }
755 else
756 {
757 roleTup = SearchSysCache1(AUTHOID, ObjectIdGetDatum(roleid));
758 if (!HeapTupleIsValid(roleTup))
760 (errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION),
761 errmsg("role with OID %u does not exist", roleid)));
762 }
763
764 rform = (Form_pg_authid) GETSTRUCT(roleTup);
765 roleid = rform->oid;
766 rname = NameStr(rform->rolname);
767 is_superuser = rform->rolsuper;
768
770
771 /*
772 * Set SessionUserId and related variables, including "role", via the GUC
773 * mechanisms.
774 *
775 * Note: ideally we would use PGC_S_DYNAMIC_DEFAULT here, so that
776 * session_authorization could subsequently be changed from
777 * pg_db_role_setting entries. Instead, session_authorization in
778 * pg_db_role_setting has no effect. Changing that would require solving
779 * two problems:
780 *
781 * 1. If pg_db_role_setting has values for both session_authorization and
782 * role, we could not be sure which order those would be applied in, and
783 * it would matter.
784 *
785 * 2. Sites may have years-old session_authorization entries. There's not
786 * been any particular reason to remove them. Ending the dormancy of
787 * those entries could seriously change application behavior, so only a
788 * major release should do that.
789 */
790 SetConfigOption("session_authorization", rname,
792
793 /*
794 * These next checks are not enforced when in standalone mode, so that
795 * there is a way to recover from sillinesses like "UPDATE pg_authid SET
796 * rolcanlogin = false;".
797 */
799 {
800 /*
801 * Is role allowed to login at all? (But background workers can
802 * override this by setting bypass_login_check.)
803 */
804 if (!bypass_login_check && !rform->rolcanlogin)
806 (errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION),
807 errmsg("role \"%s\" is not permitted to log in",
808 rname)));
809
810 /*
811 * Check connection limit for this role. We enforce the limit only
812 * for regular backends, since other process types have their own
813 * PGPROC pools.
814 *
815 * There is a race condition here --- we create our PGPROC before
816 * checking for other PGPROCs. If two backends did this at about the
817 * same time, they might both think they were over the limit, while
818 * ideally one should succeed and one fail. Getting that to work
819 * exactly seems more trouble than it is worth, however; instead we
820 * just document that the connection limit is approximate.
821 */
822 if (rform->rolconnlimit >= 0 &&
824 !is_superuser &&
825 CountUserBackends(roleid) > rform->rolconnlimit)
827 (errcode(ERRCODE_TOO_MANY_CONNECTIONS),
828 errmsg("too many connections for role \"%s\"",
829 rname)));
830 }
831
832 ReleaseSysCache(roleTup);
833}
bool InitializingParallelWorker
Definition: parallel.c:121
bool IsUnderPostmaster
Definition: globals.c:120
void SetConfigOption(const char *name, const char *value, GucContext context, GucSource source)
Definition: guc.c:4337
@ PGC_S_OVERRIDE
Definition: guc.h:123
@ PGC_BACKEND
Definition: guc.h:77
void AcceptInvalidationMessages(void)
Definition: inval.c:930
#define IsBootstrapProcessingMode()
Definition: miscadmin.h:476
#define AmRegularBackendProcess()
Definition: miscadmin.h:380
void SetAuthenticatedUserId(Oid userid)
Definition: miscinit.c:552
static bool is_superuser(Archive *fout)
Definition: pg_dump.c:5040
static Datum PointerGetDatum(const void *X)
Definition: postgres.h:332
int CountUserBackends(Oid roleid)
Definition: procarray.c:3662

References AcceptInvalidationMessages(), AmRegularBackendProcess, Assert(), CountUserBackends(), ereport, errcode(), errmsg(), FATAL, 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 840 of file miscinit.c.

841{
842 /*
843 * This function should only be called in single-user mode, in autovacuum
844 * workers, in slot sync worker and in background workers.
845 */
848
849 /* call only once */
851
852 AuthenticatedUserId = BOOTSTRAP_SUPERUSERID;
853
854 /*
855 * XXX Ideally we'd do this via SetConfigOption("session_authorization"),
856 * but we lack the role name needed to do that, and we can't fetch it
857 * because one reason for this special case is to be able to start up even
858 * if something's happened to the BOOTSTRAP_SUPERUSERID's pg_authid row.
859 * Since we don't set the GUC itself, C code will see the value as NULL,
860 * and current_setting() will report an empty string within this session.
861 */
862 SetSessionAuthorization(BOOTSTRAP_SUPERUSERID, true);
863
864 /* We could do SetConfigOption("role"), but let's be consistent */
866}
#define AmAutoVacuumWorkerProcess()
Definition: miscadmin.h:382
#define AmBackgroundWorkerProcess()
Definition: miscadmin.h:383
#define AmLogicalSlotSyncWorkerProcess()
Definition: miscadmin.h:385
void SetSessionAuthorization(Oid userid, bool is_superuser)
Definition: miscinit.c:920
void SetCurrentRoleId(Oid roleid, bool is_superuser)
Definition: miscinit.c:956

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

Referenced by InitPostgres().

◆ InitializeSystemUser()

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

Definition at line 874 of file miscinit.c.

875{
876 char *system_user;
877
878 /* call only once */
879 Assert(SystemUser == NULL);
880
881 /*
882 * InitializeSystemUser should be called only when authn_id is not NULL,
883 * meaning that auth_method is valid.
884 */
885 Assert(authn_id != NULL);
886
887 system_user = psprintf("%s:%s", auth_method, authn_id);
888
889 /* Store SystemUser in long-lived storage */
892}
char * MemoryContextStrdup(MemoryContext context, const char *string)
Definition: mcxt.c:1746
void pfree(void *pointer)
Definition: mcxt.c:1594
MemoryContext TopMemoryContext
Definition: mcxt.c:166
Datum system_user(PG_FUNCTION_ARGS)
Definition: miscinit.c:898
char * psprintf(const char *fmt,...)
Definition: psprintf.c:43
static char * authn_id
Definition: validator.c:41

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

Referenced by InitPostgres(), and ParallelWorkerMain().

◆ InitPostmasterChild()

void InitPostmasterChild ( void  )

Definition at line 96 of file miscinit.c.

97{
98 IsUnderPostmaster = true; /* we are a postmaster subprocess now */
99
100 /*
101 * Start our win32 signal implementation. This has to be done after we
102 * read the backend variables, because we need to pick up the signal pipe
103 * from the parent process.
104 */
105#ifdef WIN32
107#endif
108
110
111 /*
112 * make sure stderr is in binary mode before anything can possibly be
113 * written to it, in case it's actually the syslogger pipe, so the pipe
114 * chunking protocol isn't disturbed. Non-logpipe data gets translated on
115 * redirection (e.g. via pg_ctl -l) anyway.
116 */
117#ifdef WIN32
118 _setmode(fileno(stderr), _O_BINARY);
119#endif
120
121 /* We don't want the postmaster's proc_exit() handlers */
123
124 /* In EXEC_BACKEND case we will not have inherited BlockSig etc values */
125#ifdef EXEC_BACKEND
126 pqinitmask();
127#endif
128
129 /* Initialize process-local latch support */
133
134 /*
135 * If possible, make this process a group leader, so that the postmaster
136 * can signal any child processes too. Not all processes will have
137 * children, but for consistency we make all postmaster child processes do
138 * this.
139 */
140#ifdef HAVE_SETSID
141 if (setsid() < 0)
142 elog(FATAL, "setsid() failed: %m");
143#endif
144
145 /*
146 * Every postmaster child process is expected to respond promptly to
147 * SIGQUIT at all times. Therefore we centrally remove SIGQUIT from
148 * BlockSig and install a suitable signal handler. (Client-facing
149 * processes may choose to replace this default choice of handler with
150 * quickdie().) All other blockable signals remain blocked for now.
151 */
153
154 sigdelset(&BlockSig, SIGQUIT);
155 sigprocmask(SIG_SETMASK, &BlockSig, NULL);
156
157 /* Request a signal if the postmaster dies, if possible. */
159
160 /* Don't give the pipe to subprograms that we execute. */
161#ifndef WIN32
162 if (fcntl(postmaster_alive_fds[POSTMASTER_FD_WATCH], F_SETFD, FD_CLOEXEC) < 0)
165 errmsg_internal("could not set postmaster death monitoring pipe to FD_CLOEXEC mode: %m")));
166#endif
167}
void pqinitmask(void)
Definition: pqsignal.c:41
sigset_t BlockSig
Definition: pqsignal.c:23
int errcode_for_socket_access(void)
Definition: elog.c:954
int errmsg_internal(const char *fmt,...)
Definition: elog.c:1161
void SignalHandlerForCrashExit(SIGNAL_ARGS)
Definition: interrupt.c:73
void on_exit_reset(void)
Definition: ipc.c:416
void InitializeLatchWaitSet(void)
Definition: latch.c:35
void InitProcessLocalLatch(void)
Definition: miscinit.c:235
void PostmasterDeathSignalInit(void)
Definition: pmsignal.c:407
#define pqsignal
Definition: port.h:531
void InitProcessGlobals(void)
Definition: postmaster.c:1935
int postmaster_alive_fds[2]
Definition: postmaster.c:483
#define POSTMASTER_FD_WATCH
Definition: postmaster.h:83
void pgwin32_signal_initialize(void)
Definition: signal.c:79
void InitializeWaitEventSupport(void)
Definition: waiteventset.c:241
#define SIGQUIT
Definition: win32_port.h:159

References BlockSig, elog, ereport, errcode_for_socket_access(), errmsg_internal(), FATAL, 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 235 of file miscinit.c.

236{
239}
struct Latch * MyLatch
Definition: globals.c:63
void InitLatch(Latch *latch)
Definition: latch.c:63
static Latch LocalLatchData
Definition: miscinit.c:69

References InitLatch(), LocalLatchData, and MyLatch.

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

◆ InitStandaloneProcess()

void InitStandaloneProcess ( const char *  argv0 )

Definition at line 175 of file miscinit.c.

176{
178
180
181 /*
182 * Start our win32 signal implementation
183 */
184#ifdef WIN32
186#endif
187
189
190 /* Initialize process-local latch support */
194
195 /*
196 * For consistency with InitPostmasterChild, initialize signal mask here.
197 * But we don't unblock SIGQUIT or provide a default handler for it.
198 */
199 pqinitmask();
200 sigprocmask(SIG_SETMASK, &BlockSig, NULL);
201
202 /* Compute paths, no postmaster to inherit from */
203 if (my_exec_path[0] == '0円')
204 {
206 elog(FATAL, "%s: could not locate my own executable path",
207 argv0);
208 }
209
210 if (pkglib_path[0] == '0円')
212}
int find_my_exec(const char *argv0, char *retpath)
Definition: exec.c:161
char pkglib_path[MAXPGPATH]
Definition: globals.c:82
bool IsPostmasterEnvironment
Definition: globals.c:119
char my_exec_path[MAXPGPATH]
Definition: globals.c:81
@ B_STANDALONE_BACKEND
Definition: miscadmin.h:349
BackendType MyBackendType
Definition: miscinit.c:64
static char * argv0
Definition: pg_ctl.c:93
void get_pkglib_path(const char *my_exec_path, char *ret_path)
Definition: path.c:956

References argv0, Assert(), B_STANDALONE_BACKEND, BlockSig, elog, FATAL, 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 630 of file miscinit.c.

631{
633}
#define SECURITY_LOCAL_USERID_CHANGE
Definition: miscadmin.h:317

References SECURITY_LOCAL_USERID_CHANGE, and SecurityRestrictionContext.

Referenced by GetUserIdAndContext(), and set_config_with_handle().

◆ InNoForceRLSOperation()

bool InNoForceRLSOperation ( void  )

Definition at line 648 of file miscinit.c.

649{
651}
#define SECURITY_NOFORCE_RLS
Definition: miscadmin.h:319

References SECURITY_NOFORCE_RLS, and SecurityRestrictionContext.

Referenced by check_enable_rls().

◆ InSecurityRestrictedOperation()

bool InSecurityRestrictedOperation ( void  )

Definition at line 639 of file miscinit.c.

640{
642}
#define SECURITY_RESTRICTED_OPERATION
Definition: miscadmin.h:318

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 1799 of file miscinit.c.

1800{
1801 char *rawstring;
1802 List *elemlist;
1803 ListCell *l;
1804
1805 if (libraries == NULL || libraries[0] == '0円')
1806 return; /* nothing to do */
1807
1808 /* Need a modifiable copy of string */
1809 rawstring = pstrdup(libraries);
1810
1811 /* Parse string into list of filename paths */
1812 if (!SplitDirectoriesString(rawstring, ',', &elemlist))
1813 {
1814 /* syntax error in list */
1815 list_free_deep(elemlist);
1816 pfree(rawstring);
1817 ereport(LOG,
1818 (errcode(ERRCODE_SYNTAX_ERROR),
1819 errmsg("invalid list syntax in parameter \"%s\"",
1820 gucname)));
1821 return;
1822 }
1823
1824 foreach(l, elemlist)
1825 {
1826 /* Note that filename was already canonicalized */
1827 char *filename = (char *) lfirst(l);
1828 char *expanded = NULL;
1829
1830 /* If restricting, insert $libdir/plugins if not mentioned already */
1831 if (restricted && first_dir_separator(filename) == NULL)
1832 {
1833 expanded = psprintf("$libdir/plugins/%s", filename);
1834 filename = expanded;
1835 }
1838 (errmsg_internal("loaded library \"%s\"", filename)));
1839 if (expanded)
1840 pfree(expanded);
1841 }
1842
1843 list_free_deep(elemlist);
1844 pfree(rawstring);
1845}
static bool restricted
Definition: command.c:199
void load_file(const char *filename, bool restricted)
Definition: dfmgr.c:149
#define DEBUG1
Definition: elog.h:30
void list_free_deep(List *list)
Definition: list.c:1560
#define lfirst(lc)
Definition: pg_list.h:172
char * first_dir_separator(const char *filename)
Definition: path.c:110
Definition: pg_list.h:54
Definition: pg_list.h:46
bool SplitDirectoriesString(char *rawstring, char separator, List **namelist)
Definition: varlena.c:2871

References DEBUG1, ereport, errcode(), errmsg(), errmsg_internal(), 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 1888 of file miscinit.c.

1889{
1890#ifdef ENABLE_NLS
1891 if (my_exec_path[0] != '0円')
1892 {
1893 char locale_path[MAXPGPATH];
1894
1895 get_locale_path(my_exec_path, locale_path);
1896 bindtextdomain(domain, locale_path);
1897 pg_bind_textdomain_codeset(domain);
1898 }
1899#endif
1900}
void get_locale_path(const char *my_exec_path, char *ret_path)
Definition: path.c:965

References get_locale_path(), MAXPGPATH, and my_exec_path.

Referenced by _PG_init().

◆ process_session_preload_libraries()

void process_session_preload_libraries ( void  )

Definition at line 1865 of file miscinit.c.

1866{
1868 "session_preload_libraries",
1869 false);
1871 "local_preload_libraries",
1872 true);
1873}
char * session_preload_libraries_string
Definition: miscinit.c:1781
char * local_preload_libraries_string
Definition: miscinit.c:1783
static void load_libraries(const char *libraries, const char *gucname, bool restricted)
Definition: miscinit.c:1799

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 1851 of file miscinit.c.

1852{
1855 "shared_preload_libraries",
1856 false);
1859}
bool process_shared_preload_libraries_done
Definition: miscinit.c:1787
char * shared_preload_libraries_string
Definition: miscinit.c:1782
bool process_shared_preload_libraries_in_progress
Definition: miscinit.c:1786

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 1879 of file miscinit.c.

1880{
1885}
bool process_shmem_requests_in_progress
Definition: miscinit.c:1790
shmem_request_hook_type shmem_request_hook
Definition: miscinit.c:1789

References process_shmem_requests_in_progress, and shmem_request_hook.

Referenced by PostgresSingleUserMain(), and PostmasterMain().

◆ RecheckDataDirLockFile()

bool RecheckDataDirLockFile ( void  )

Definition at line 1646 of file miscinit.c.

1647{
1648 int fd;
1649 int len;
1650 long file_pid;
1651 char buffer[BLCKSZ];
1652
1653 fd = open(DIRECTORY_LOCK_FILE, O_RDWR | PG_BINARY, 0);
1654 if (fd < 0)
1655 {
1656 /*
1657 * There are many foreseeable false-positive error conditions. For
1658 * safety, fail only on enumerated clearly-something-is-wrong
1659 * conditions.
1660 */
1661 switch (errno)
1662 {
1663 case ENOENT:
1664 case ENOTDIR:
1665 /* disaster */
1666 ereport(LOG,
1668 errmsg("could not open file \"%s\": %m",
1670 return false;
1671 default:
1672 /* non-fatal, at least for now */
1673 ereport(LOG,
1675 errmsg("could not open file \"%s\": %m; continuing anyway",
1677 return true;
1678 }
1679 }
1680 pgstat_report_wait_start(WAIT_EVENT_LOCK_FILE_RECHECKDATADIR_READ);
1681 len = read(fd, buffer, sizeof(buffer) - 1);
1683 if (len < 0)
1684 {
1685 ereport(LOG,
1687 errmsg("could not read from file \"%s\": %m",
1689 close(fd);
1690 return true; /* treat read failure as nonfatal */
1691 }
1692 buffer[len] = '0円';
1693 close(fd);
1694 file_pid = atol(buffer);
1695 if (file_pid == getpid())
1696 return true; /* all is well */
1697
1698 /* Trouble: someone's overwritten the lock file */
1699 ereport(LOG,
1700 (errmsg("lock file \"%s\" contains wrong PID: %ld instead of %ld",
1701 DIRECTORY_LOCK_FILE, file_pid, (long) getpid())));
1702 return false;
1703}

References close, DIRECTORY_LOCK_FILE, ereport, errcode_for_file_access(), errmsg(), 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 1084 of file miscinit.c.

1085{
1087
1088 memcpy(&serialized, conninfo, sizeof(serialized));
1089
1090 /* Copy the fields back into place */
1093
1094 if (serialized.authn_id_len >= 0)
1095 {
1096 char *authn_id;
1097
1098 authn_id = conninfo + sizeof(serialized);
1100 authn_id);
1101 }
1102}
UserAuth auth_method
Definition: libpq-be.h:105

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

Referenced by ParallelWorkerMain().

◆ SerializeClientConnectionInfo()

void SerializeClientConnectionInfo ( Size maxsize  PG_USED_FOR_ASSERTS_ONLY,
char *  start_address 
)

Definition at line 1051 of file miscinit.c.

1053{
1054 SerializedClientConnectionInfo serialized = {0};
1055
1056 serialized.authn_id_len = -1;
1058
1060 serialized.authn_id_len = strlen(MyClientConnectionInfo.authn_id);
1061
1062 /* Copy serialized representation to buffer */
1063 Assert(maxsize >= sizeof(serialized));
1064 memcpy(start_address, &serialized, sizeof(serialized));
1065
1066 maxsize -= sizeof(serialized);
1067 start_address += sizeof(serialized);
1068
1069 /* Copy authn_id into the space after the struct */
1070 if (serialized.authn_id_len >= 0)
1071 {
1072 Assert(maxsize >= (serialized.authn_id_len + 1));
1073 memcpy(start_address,
1075 /* include the NULL terminator to ease deserialization */
1076 serialized.authn_id_len + 1);
1077 }
1078}

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

Referenced by InitializeParallelDSM().

◆ SetAuthenticatedUserId()

void SetAuthenticatedUserId ( Oid  userid )

Definition at line 552 of file miscinit.c.

553{
554 Assert(OidIsValid(userid));
555
556 /* call only once */
558
559 AuthenticatedUserId = userid;
560
561 /* Also mark our PGPROC entry with the authenticated user id */
562 /* (We assume this is an atomic store so no lock is needed) */
563 MyProc->roleId = userid;
564}
PGPROC * MyProc
Definition: proc.c:66
Oid roleId
Definition: proc.h:225

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

Referenced by InitializeSessionUserId(), and ParallelWorkerMain().

◆ SetCurrentRoleId()

void SetCurrentRoleId ( Oid  roleid,
bool  is_superuser 
)

Definition at line 956 of file miscinit.c.

957{
958 /*
959 * Get correct info if it's SET ROLE NONE
960 *
961 * If SessionUserId hasn't been set yet, do nothing beyond updating
962 * SetRoleIsActive --- the eventual SetSessionAuthorization call will
963 * update the derived state. This is needed since we will get called
964 * during GUC initialization.
965 */
966 if (!OidIsValid(roleid))
967 {
968 SetRoleIsActive = false;
969
971 return;
972
973 roleid = SessionUserId;
975 }
976 else
977 SetRoleIsActive = true;
978
980}
static void SetOuterUserId(Oid userid, bool is_superuser)
Definition: miscinit.c:488

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 283 of file miscinit.c.

284{
285 /* This should happen only once per process */
288}
char * DatabasePath
Definition: globals.c:104

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

Referenced by InitPostgres().

◆ SetDataDir()

void SetDataDir ( const char *  dir )

Definition at line 389 of file miscinit.c.

390{
391 char *new;
392
393 Assert(dir);
394
395 /* If presented path is relative, convert to absolute */
396 new = make_absolute_path(dir);
397
398 free(DataDir);
399 DataDir = new;
400}
#define free(a)
Definition: header.h:65
char * make_absolute_path(const char *path)
Definition: path.c:807

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

Referenced by SelectConfigFiles().

◆ SetOuterUserId()

static void SetOuterUserId ( Oid  userid,
bool  is_superuser 
)
static

Definition at line 488 of file miscinit.c.

489{
491 Assert(OidIsValid(userid));
492 OuterUserId = userid;
493
494 /* We force the effective user ID to match, too */
495 CurrentUserId = userid;
496
497 /* Also update the is_superuser GUC to match OuterUserId's property */
498 SetConfigOption("is_superuser",
499 is_superuser ? "on" : "off",
501}
@ PGC_S_DYNAMIC_DEFAULT
Definition: guc.h:114
@ PGC_INTERNAL
Definition: guc.h:73

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 920 of file miscinit.c.

921{
923
924 if (!SetRoleIsActive)
926}
static void SetSessionUserId(Oid userid, bool is_superuser)
Definition: miscinit.c:522

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 522 of file miscinit.c.

523{
525 Assert(OidIsValid(userid));
526 SessionUserId = userid;
528}

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

Referenced by SetSessionAuthorization().

◆ SetUserIdAndContext()

void SetUserIdAndContext ( Oid  userid,
bool  sec_def_context 
)

Definition at line 668 of file miscinit.c.

669{
670 /* We throw the same error SET ROLE would. */
673 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
674 errmsg("cannot set parameter \"%s\" within security-restricted operation",
675 "role")));
676 CurrentUserId = userid;
677 if (sec_def_context)
679 else
680 SecurityRestrictionContext &= ~SECURITY_LOCAL_USERID_CHANGE;
681}
bool InSecurityRestrictedOperation(void)
Definition: miscinit.c:639

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

◆ SetUserIdAndSecContext()

void SetUserIdAndSecContext ( Oid  userid,
int  sec_context 
)

Definition at line 619 of file miscinit.c.

620{
621 CurrentUserId = userid;
622 SecurityRestrictionContext = sec_context;
623}

References CurrentUserId, and SecurityRestrictionContext.

Referenced by AbortSubTransaction(), AbortTransaction(), AfterTriggerExecute(), amcheck_lock_relation_and_check(), 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 242 of file miscinit.c.

243{
245 Assert(MyProc != NULL && MyLatch == &MyProc->procLatch);
246
248
249 if (FeBeWaitSet)
251 MyLatch);
252
254}
void SetLatch(Latch *latch)
Definition: latch.c:290
#define FeBeWaitSetLatchPos
Definition: libpq.h:64
WaitEventSet * FeBeWaitSet
Definition: pqcomm.c:166
Latch procLatch
Definition: proc.h:186
void ModifyWaitEvent(WaitEventSet *set, int pos, uint32 events, Latch *latch)
Definition: waiteventset.c:656
#define WL_LATCH_SET
Definition: waiteventset.h:34

References Assert(), 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 215 of file miscinit.c.

216{
218 Assert(MyProc != NULL);
219
221
222 if (FeBeWaitSet)
224 MyLatch);
225
226 /*
227 * Set the shared latch as the local one might have been set. This
228 * shouldn't normally be necessary as code is supposed to check the
229 * condition before waiting for the latch, but a bit care can't hurt.
230 */
232}

References Assert(), 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 898 of file miscinit.c.

899{
900 const char *sysuser = GetSystemUser();
901
902 if (sysuser)
904 else
906}
#define CStringGetTextDatum(s)
Definition: builtins.h:97
#define PG_RETURN_NULL()
Definition: fmgr.h:345
#define PG_RETURN_DATUM(x)
Definition: fmgr.h:353
const char * GetSystemUser(void)
Definition: miscinit.c:535

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

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

◆ TouchSocketLockFiles()

void TouchSocketLockFiles ( void  )

Definition at line 1490 of file miscinit.c.

1491{
1492 ListCell *l;
1493
1494 foreach(l, lock_files)
1495 {
1496 char *socketLockFile = (char *) lfirst(l);
1497
1498 /* No need to touch the data directory lock file, we trust */
1499 if (strcmp(socketLockFile, DIRECTORY_LOCK_FILE) == 0)
1500 continue;
1501
1502 /* we just ignore any error here */
1503 (void) utime(socketLockFile, NULL);
1504 }
1505}

References DIRECTORY_LOCK_FILE, lfirst, and lock_files.

Referenced by ServerLoop().

◆ UnlinkLockFiles()

static void UnlinkLockFiles ( int  status,
Datum  arg 
)
static

Definition at line 1124 of file miscinit.c.

1125{
1126 ListCell *l;
1127
1128 foreach(l, lock_files)
1129 {
1130 char *curfile = (char *) lfirst(l);
1131
1132 unlink(curfile);
1133 /* Should we complain if the unlink fails? */
1134 }
1135 /* Since we're about to exit, no need to reclaim storage */
1136
1137 /*
1138 * Lock file removal should always be the last externally visible action
1139 * of a postmaster or standalone backend, while we won't come here at all
1140 * when exiting postmaster child processes. Therefore, this is a good
1141 * place to log completion of shutdown. We could alternatively teach
1142 * proc_exit() to do it, but that seems uglier. In a standalone backend,
1143 * use NOTICE elevel to be less chatty.
1144 */
1146 (errmsg("database system is shut down")));
1147}
#define NOTICE
Definition: elog.h:35

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

Referenced by CreateLockFile().

◆ ValidatePgVersion()

void ValidatePgVersion ( const char *  path )

Definition at line 1718 of file miscinit.c.

1719{
1720 char full_path[MAXPGPATH];
1721 FILE *file;
1722 int ret;
1723 long file_major;
1724 long my_major;
1725 char *endptr;
1726 char file_version_string[64];
1727 const char *my_version_string = PG_VERSION;
1728
1729 my_major = strtol(my_version_string, &endptr, 10);
1730
1731 snprintf(full_path, sizeof(full_path), "%s/PG_VERSION", path);
1732
1733 file = AllocateFile(full_path, "r");
1734 if (!file)
1735 {
1736 if (errno == ENOENT)
1737 ereport(FATAL,
1738 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1739 errmsg("\"%s\" is not a valid data directory",
1740 path),
1741 errdetail("File \"%s\" is missing.", full_path)));
1742 else
1743 ereport(FATAL,
1745 errmsg("could not open file \"%s\": %m", full_path)));
1746 }
1747
1748 file_version_string[0] = '0円';
1749 ret = fscanf(file, "%63s", file_version_string);
1750 file_major = strtol(file_version_string, &endptr, 10);
1751
1752 if (ret != 1 || endptr == file_version_string)
1753 ereport(FATAL,
1754 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1755 errmsg("\"%s\" is not a valid data directory",
1756 path),
1757 errdetail("File \"%s\" does not contain valid data.",
1758 full_path),
1759 errhint("You might need to initdb.")));
1760
1761 FreeFile(file);
1762
1763 if (my_major != file_major)
1764 ereport(FATAL,
1765 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1766 errmsg("database files are incompatible with server"),
1767 errdetail("The data directory was initialized by PostgreSQL version %s, "
1768 "which is not compatible with this version %s.",
1769 file_version_string, my_version_string)));
1770}
int FreeFile(FILE *file)
Definition: fd.c:2840
FILE * AllocateFile(const char *name, const char *mode)
Definition: fd.c:2641

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

Referenced by checkDataDir(), and InitPostgres().

Variable Documentation

◆ AuthenticatedUserId

Oid AuthenticatedUserId = InvalidOid
static

Definition at line 449 of file miscinit.c.

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

◆ CurrentUserId

Oid CurrentUserId = InvalidOid
static

Definition at line 452 of file miscinit.c.

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

◆ IgnoreSystemIndexes

bool IgnoreSystemIndexes = false

Definition at line 81 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 1783 of file miscinit.c.

Referenced by process_session_preload_libraries().

◆ LocalLatchData

Latch LocalLatchData
static

Definition at line 69 of file miscinit.c.

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

◆ lock_files

List* lock_files = NIL
static

Definition at line 67 of file miscinit.c.

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

◆ Mode

ProcessingMode Mode = InitProcessing

Definition at line 62 of file miscinit.c.

◆ MyBackendType

BackendType MyBackendType

Definition at line 64 of file miscinit.c.

Referenced by AutoVacLauncherMain(), AutoVacWorkerMain(), BackgroundWorkerMain(), BackgroundWriterMain(), CheckpointerMain(), CreateRestartPoint(), get_backend_type_for_log(), init_ps_display(), InitStandaloneProcess(), InvalidatePossiblyObsoleteSlot(), IoWorkerMain(), pgaio_init_backend(), pgaio_worker_error_callback(), PgArchiverMain(), pgstat_bestart_final(), pgstat_bestart_initial(), pgstat_count_backend_io_op(), pgstat_count_backend_io_op_time(), pgstat_count_io_op(), pgstat_flush_backend(), pgstat_io_flush_cb(), pgstat_should_report_connstat(), pgstat_write_statsfile(), PostgresMain(), ProcessStartupPacket(), ReplSlotSyncWorkerMain(), send_message_to_server_log(), standard_ProcessUtility(), StartupProcessMain(), SysLoggerMain(), WalReceiverMain(), WalSummarizerMain(), WalWriterMain(), write_csvlog(), and write_jsonlog().

◆ MyClientConnectionInfo

ClientConnectionInfo MyClientConnectionInfo

Definition at line 1018 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 451 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 1787 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 1786 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 1790 of file miscinit.c.

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

◆ SecurityRestrictionContext

int SecurityRestrictionContext = 0
static

Definition at line 458 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 1781 of file miscinit.c.

Referenced by process_session_preload_libraries().

◆ SessionUserId

Oid SessionUserId = InvalidOid
static

Definition at line 450 of file miscinit.c.

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

◆ SessionUserIsSuperuser

bool SessionUserIsSuperuser = false
static

Definition at line 456 of file miscinit.c.

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

◆ SetRoleIsActive

bool SetRoleIsActive = false
static

Definition at line 461 of file miscinit.c.

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

◆ shared_preload_libraries_string

char* shared_preload_libraries_string = NULL

Definition at line 1782 of file miscinit.c.

Referenced by process_shared_preload_libraries().

◆ shmem_request_hook

shmem_request_hook_type shmem_request_hook = NULL

Definition at line 1789 of file miscinit.c.

Referenced by _PG_init(), and process_shmem_requests().

◆ SystemUser

const char* SystemUser = NULL
static

Definition at line 453 of file miscinit.c.

Referenced by GetSystemUser(), and InitializeSystemUser().

AltStyle によって変換されたページ (->オリジナル) /