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This is a fix to be included in 1.02.1. It adds a tip for people

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getting semaphore or shared memory errors.

Submitted by: bryanh@giraffe.netgate.net (Bryan Henderson)
This commit is contained in:
Marc G. Fournier 1996-08-14 05:01:53 +00:00
parent 011ee13131
commit 988a9adfbd
1 changed files with 20 additions and 1 deletions
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21
src/backend/storage/ipc/ipc.c
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@ -7,7 +7,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/ipc/ipc.c,v 1.3 1996/07/25 19:45:24 scrappy Exp $ * $Header: /cvsroot/pgsql/src/backend/storage/ipc/ipc.c,v 1.4 1996/08/14 05:01:53 scrappy Exp $
* *
* NOTES * NOTES
* *
@ -60,6 +60,7 @@ static struct ONEXIT {
} onexit_list[ MAX_ON_EXITS ]; } onexit_list[ MAX_ON_EXITS ];
static int onexit_index; static int onexit_index;
static void IpcConfigTip();
typedef struct _PrivateMemStruct { typedef struct _PrivateMemStruct {
int id; int id;
@ -272,6 +273,7 @@ IpcSemaphoreCreate(IpcSemaphoreKey semKey,
if (semId < 0) { if (semId < 0) {
perror("semget"); perror("semget");
IpcConfigTip();
exitpg(3); exitpg(3);
} }
for (i = 0; i < semNum; i++) { for (i = 0; i < semNum; i++) {
@ -281,6 +283,7 @@ IpcSemaphoreCreate(IpcSemaphoreKey semKey,
errStatus = semctl(semId, 0, SETALL, semun); errStatus = semctl(semId, 0, SETALL, semun);
if (errStatus == -1) { if (errStatus == -1) {
perror("semctl"); perror("semctl");
IpcConfigTip();
} }
if (removeOnExit) if (removeOnExit)
@ -320,7 +323,10 @@ IpcSemaphoreSet(int semId, int semno, int value)
IpcSemaphoreSet_return = errStatus; IpcSemaphoreSet_return = errStatus;
if (errStatus == -1) if (errStatus == -1)
{
perror("semctl"); perror("semctl");
IpcConfigTip();
}
} }
/****************************************************************************/ /****************************************************************************/
@ -377,6 +383,7 @@ IpcSemaphoreLock(IpcSemaphoreId semId, int sem, int lock)
if (errStatus == -1) { if (errStatus == -1) {
perror("semop"); perror("semop");
IpcConfigTip();
exitpg(255); exitpg(255);
} }
} }
@ -419,6 +426,7 @@ IpcSemaphoreUnlock(IpcSemaphoreId semId, int sem, int lock)
if (errStatus == -1) { if (errStatus == -1) {
perror("semop"); perror("semop");
IpcConfigTip();
exitpg(255); exitpg(255);
} }
} }
@ -466,6 +474,7 @@ IpcMemoryCreate(IpcMemoryKey memKey, uint32 size, int permission)
fprintf(stderr,"IpcMemoryCreate: memKey=%d , size=%d , permission=%d", fprintf(stderr,"IpcMemoryCreate: memKey=%d , size=%d , permission=%d",
memKey, size , permission ); memKey, size , permission );
perror("IpcMemoryCreate: shmget(..., create, ...) failed"); perror("IpcMemoryCreate: shmget(..., create, ...) failed");
IpcConfigTip();
return(IpcMemCreationFailed); return(IpcMemCreationFailed);
} }
@ -490,6 +499,7 @@ IpcMemoryIdGet(IpcMemoryKey memKey, uint32 size)
fprintf(stderr,"IpcMemoryIdGet: memKey=%d , size=%d , permission=%d", fprintf(stderr,"IpcMemoryIdGet: memKey=%d , size=%d , permission=%d",
memKey, size , 0 ); memKey, size , 0 );
perror("IpcMemoryIdGet: shmget() failed"); perror("IpcMemoryIdGet: shmget() failed");
IpcConfigTip();
return(IpcMemIdGetFailed); return(IpcMemIdGetFailed);
} }
@ -530,6 +540,7 @@ IpcMemoryAttach(IpcMemoryId memId)
/* if ( *memAddress == -1) { XXX ??? */ /* if ( *memAddress == -1) { XXX ??? */
if ( memAddress == (char *)-1) { if ( memAddress == (char *)-1) {
perror("IpcMemoryAttach: shmat() failed"); perror("IpcMemoryAttach: shmat() failed");
IpcConfigTip();
return(IpcMemAttachFailed); return(IpcMemAttachFailed);
} }
@ -706,3 +717,11 @@ LockIsFree(int lockid)
} }
#endif /* HAS_TEST_AND_SET */ #endif /* HAS_TEST_AND_SET */
static void
IpcConfigTip()
{
fprintf(stderr,"This type of error is usually caused by improper\n");
fprintf(stderr,"shared memory or System V IPC semaphore configuration.\n");
fprintf(stderr,"See the FAQ for more detailed information\n");
}