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Fix bugs in the last change of ipc_gid option

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- Fix semaphore gid control
- Do semaphore discard for all semaphores (although currently defined as 1)
- Fix the wrong check of return value from shmctl
This commit is contained in:
Takashi Iwai 2005-05-30 17:56:12 +00:00
parent 270da603fd
commit b69ab56881
2 changed files with 17 additions and 10 deletions
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25
src/pcm/pcm_direct.c
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@ -50,7 +50,8 @@
int snd_pcm_direct_semaphore_create_or_connect(snd_pcm_direct_t *dmix)
{
struct shmid_ds buf;
struct semid_ds buf;
int i;
dmix->semid = semget(dmix->ipc_key, DIRECT_IPC_SEMS,
IPC_CREAT | dmix->ipc_perm);
@ -58,22 +59,28 @@ int snd_pcm_direct_semaphore_create_or_connect(snd_pcm_direct_t *dmix)
return -errno;
if (dmix->ipc_gid < 0)
return 0;
if (shmctl(dmix->semid, IPC_STAT, &buf) < 0) {
int err = -errno;
snd_pcm_direct_semaphore_discard(dmix);
return err;
for (i = 0; i < DIRECT_IPC_SEMS; i++) {
if (semctl(dmix->semid, i, IPC_STAT, &buf) < 0) {
int err = -errno;
snd_pcm_direct_semaphore_discard(dmix);
return err;
}
buf.sem_perm.gid = dmix->ipc_gid;
semctl(dmix->semid, i, IPC_SET, &buf);
}
buf.shm_perm.gid = dmix->ipc_gid;
shmctl(dmix->semid, IPC_SET, &buf);
return 0;
}
int snd_pcm_direct_semaphore_discard(snd_pcm_direct_t *dmix)
{
int i;
if (dmix->semid < 0)
return -EINVAL;
if (semctl(dmix->semid, 0, IPC_RMID, NULL) < 0)
return -errno;
for (i = 0; i < DIRECT_IPC_SEMS; i++) {
if (semctl(dmix->semid, i, IPC_RMID, NULL) < 0)
return -errno;
}
dmix->semid = -1;
return 0;
}