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Use expected union semun for arguments in selected semaphore operations.

This is standard and expected use. It also prevents errors related with
misalignment of the arguments for semaphore operations on some architectures.
This commit is contained in:
Peter Rajnoha 2010-05-27 15:02:56 +00:00
parent 30a653105c
commit c0ea4c94a1
2 changed files with 17 additions and 1 deletions

View File

@ -1,5 +1,6 @@
Version 1.02.49 -
================================
Use expected union semun for arguments in selected semaphore operations.
Version 1.02.48 - 17th May 2010
================================

View File

@ -43,6 +43,18 @@
#define DEV_DIR "/dev/"
#ifdef UDEV_SYNC_SUPPORT
#ifdef _SEM_SEMUN_UNDEFINED
union semun
{
int val; /* value for SETVAL */
struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
unsigned short int *array; /* array for GETALL & SETALL */
struct seminfo *__buf; /* buffer for IPC_INFO */
};
#endif
#endif
static char _dm_dir[PATH_MAX] = DEV_DIR DM_DIR;
static int _verbose = 0;
@ -1076,6 +1088,7 @@ static int _udev_notify_sem_create(uint32_t *cookie, int *semid)
int gen_semid;
uint16_t base_cookie;
uint32_t gen_cookie;
union semun sem_arg;
if ((fd = open("/dev/urandom", O_RDONLY)) < 0) {
log_error("Failed to open /dev/urandom "
@ -1123,7 +1136,9 @@ static int _udev_notify_sem_create(uint32_t *cookie, int *semid)
log_debug("Udev cookie 0x%" PRIx32 " (semid %d) created",
gen_cookie, gen_semid);
if (semctl(gen_semid, 0, SETVAL, 1) < 0) {
sem_arg.val = 1;
if (semctl(gen_semid, 0, SETVAL, sem_arg) < 0) {
log_error("semid %d: semctl failed: %s", gen_semid, strerror(errno));
/* We have to destroy just created semaphore
* so it won't stay in the system. */