Dmitry V. Levin
499c5aad0c
On architectures where the semctl call is implemented by the ipc syscall the 4th argument is passed by reference. * ipc.c (sys_semctl): Handle the indirect ipc subcall case. * tests/ipc_sem.c (main): Optionally match indirection in the 4th argument of semctl calls. Reported-by: Andreas Schwab <schwab@suse.de>
66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <sys/sem.h>
|
|
|
|
union semun {
|
|
int val; /* Value for SETVAL */
|
|
struct semid_ds *buf; /* Buffer for IPC_STAT, IPC_SET */
|
|
unsigned short *array; /* Array for GETALL, SETALL */
|
|
struct seminfo *__buf; /* Buffer for IPC_INFO
|
|
(Linux-specific) */
|
|
};
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
int rc, id;
|
|
union semun un;
|
|
struct semid_ds ds;
|
|
struct seminfo info;
|
|
|
|
id = semget(IPC_PRIVATE, 1, 0600);
|
|
if (id < 0)
|
|
return 77;
|
|
printf("semget\\(IPC_PRIVATE, 1, 0600\\) += %d\n", id);
|
|
|
|
un.buf = &ds;
|
|
if (semctl(id, 0, IPC_STAT, un))
|
|
goto fail;
|
|
printf("semctl\\(%d, 0, (IPC_64\\|)?IPC_STAT, \\[?%p\\]?\\) += 0\n",
|
|
id, &ds);
|
|
|
|
un.__buf = &info;
|
|
int max = semctl(0, 0, SEM_INFO, un);
|
|
if (max < 0)
|
|
goto fail;
|
|
printf("semctl\\(0, 0, (IPC_64\\|)?SEM_INFO, \\[?%p\\]?\\) += %d\n",
|
|
&info, max);
|
|
|
|
un.buf = &ds;
|
|
rc = semctl(id, 0, SEM_STAT, un);
|
|
if (rc != id) {
|
|
/*
|
|
* In linux < v2.6.24-rc1 the first argument must be
|
|
* an index in the kernel's internal array.
|
|
*/
|
|
if (-1 != rc || EINVAL != errno)
|
|
goto fail;
|
|
printf("semctl\\(%d, 0, (IPC_64\\|)?SEM_STAT, \\[?%p\\]?\\)"
|
|
" += -1 EINVAL \\(Invalid argument\\)\n", id, &ds);
|
|
} else {
|
|
printf("semctl\\(%d, 0, (IPC_64\\|)?SEM_STAT, \\[?%p\\]?\\)"
|
|
" += %d\n", id, &ds, id);
|
|
}
|
|
|
|
rc = 0;
|
|
done:
|
|
if (semctl(id, 0, IPC_RMID, 0) < 0)
|
|
return 1;
|
|
printf("semctl\\(%d, 0, (IPC_64\\|)?IPC_RMID, \\[?0\\]?\\) += 0\n", id);
|
|
return rc;
|
|
|
|
fail:
|
|
rc = 1;
|
|
goto done;
|
|
}
|