/* --------------------------------
* InitUserid
*
* initializes crap associated with the user id.
* --------------------------------
*/
void
InitUserid()
{
setuid(geteuid());
SetUserId();
}
int
main(int argc, char *argv[])
{
int i, oldumask;
argcGlobal = argc;
argvGlobal = argv;
configfilename = NULL;
/* init stuff */
ProcessCmdLine(argc, argv);
/*
* Do this first thing, to get any options that only take effect at
* startup time. It is read again each time the server resets.
*/
if (ReadConfigFile(configfilename) != FSSuccess) {
FatalError("couldn't read config file\n");
}
InitErrors();
/* make sure at least world write access is disabled */
if (((oldumask = umask(022)) & 002) == 002)
(void)umask(oldumask);
SetDaemonState();
SetUserId();
while (1) {
serverGeneration++;
OsInit();
if (serverGeneration == 1) {
/* do first time init */
CreateSockets(OldListenCount, OldListen);
InitProcVectors();
clients = (ClientPtr *) fsalloc(MAXCLIENTS * sizeof(ClientPtr));
if (!clients)
FatalError("couldn't create client array\n");
for (i = MINCLIENT; i < MAXCLIENTS; i++)
clients[i] = NullClient;
/* make serverClient */
serverClient = (ClientPtr) fsalloc(sizeof(ClientRec));
if (!serverClient)
FatalError("couldn't create server client\n");
}
ResetSockets();
/* init per-cycle stuff */
InitClient(serverClient, SERVER_CLIENT, (pointer) 0);
clients[SERVER_CLIENT] = serverClient;
currentMaxClients = MINCLIENT;
currentClient = serverClient;
if (!InitClientResources(serverClient))
FatalError("couldn't init server resources\n");
InitAtoms();
InitFonts();
SetConfigValues();
if (!create_connection_block())
FatalError("couldn't create connection block\n");
#ifdef DEBUG
fprintf(stderr, "Entering Dispatch loop\n");
#endif
Dispatch();
#ifdef DEBUG
fprintf(stderr, "Leaving Dispatch loop\n");
#endif
/* clean up per-cycle stuff */
if ((dispatchException & DE_TERMINATE) || drone_server)
break;
fsfree(ConnectionInfo);
/* note that we're parsing it again, for each time the server resets */
if (ReadConfigFile(configfilename) != FSSuccess)
FatalError("couldn't read config file\n");
}
CloseSockets();
CloseErrors();
exit(0);
}
/*
* AbortTransaction
*/
static void
AbortTransaction(void)
{
TransactionState s = CurrentTransactionState;
/* Prevent cancel/die interrupt while cleaning up */
HOLD_INTERRUPTS();
/*
* Release any LW locks we might be holding as quickly as possible.
* (Regular locks, however, must be held till we finish aborting.)
* Releasing LW locks is critical since we might try to grab them
* again while cleaning up!
*/
LWLockReleaseAll();
/* Clean up buffer I/O and buffer context locks, too */
AbortBufferIO();
UnlockBuffers();
/*
* Also clean up any open wait for lock, since the lock manager will
* choke if we try to wait for another lock before doing this.
*/
LockWaitCancel();
/*
* check the current transaction state
*
* reduced to DEBUG2 because this is expected when rejecting an
* invalidly-encoded query outside a transaction block. PG 8.0
* and up fix it better, but it's not worth back-porting those
* changes to 7.4.
*/
if (s->state != TRANS_INPROGRESS)
elog(DEBUG2, "AbortTransaction and not in in-progress state");
/*
* set the current transaction state information appropriately during
* the abort processing
*/
s->state = TRANS_ABORT;
/* Make sure we are in a valid memory context */
AtAbort_Memory();
/*
* Reset user id which might have been changed transiently
*/
SetUserId(GetSessionUserId());
/*
* do abort processing
*/
DeferredTriggerAbortXact();
AtAbort_Portals();
lo_commit(false); /* 'false' means it's abort */
AtAbort_Notify();
AtEOXact_UpdatePasswordFile(false);
/* Advertise the fact that we aborted in pg_clog. */
RecordTransactionAbort();
/*
* Let others know about no transaction in progress by me. Note that
* this must be done _before_ releasing locks we hold and _after_
* RecordTransactionAbort.
*/
if (MyProc != (PGPROC *) NULL)
{
/* Lock SInvalLock because that's what GetSnapshotData uses. */
LWLockAcquire(SInvalLock, LW_EXCLUSIVE);
MyProc->xid = InvalidTransactionId;
MyProc->xmin = InvalidTransactionId;
LWLockRelease(SInvalLock);
}
/*
* Post-abort cleanup. See notes in CommitTransaction() concerning
* ordering.
*/
smgrDoPendingDeletes(false);
AtAbort_Cache();
AtEOXact_Buffers(false);
smgrabort();
AtAbort_Locks();
CallEOXactCallbacks(false);
AtEOXact_GUC(false);
AtEOXact_SPI();
AtEOXact_gist();
AtEOXact_hash();
AtEOXact_nbtree();
AtEOXact_rtree();
AtEOXact_on_commit_actions(false);
AtEOXact_Namespace(false);
AtEOXact_CatCache(false);
AtEOXact_Files();
SetReindexProcessing(InvalidOid, InvalidOid);
pgstat_count_xact_rollback();
/*
* State remains TRANS_ABORT until CleanupTransaction().
*/
RESUME_INTERRUPTS();
}
