75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) International Business Machines Corp., 2001
|
|
* 03/2001 - Written by Wayne Boyer
|
|
*/
|
|
|
|
/*\
|
|
* [Description]
|
|
*
|
|
* Test for ENOSPC error.
|
|
*
|
|
* ENOSPC - All possible shared memory segments have been taken (SHMMNI).
|
|
*/
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <sys/ipc.h>
|
|
#include <stdlib.h>
|
|
#include <pwd.h>
|
|
#include <sys/shm.h>
|
|
#include "tst_test.h"
|
|
#include "tst_safe_sysv_ipc.h"
|
|
#include "libnewipc.h"
|
|
|
|
static int *queues;
|
|
static int maxshms, queue_cnt, used_cnt;
|
|
static key_t shmkey;
|
|
|
|
static void verify_shmget(void)
|
|
{
|
|
TST_EXP_FAIL2(shmget(shmkey + maxshms, SHM_SIZE, IPC_CREAT | IPC_EXCL | SHM_RW), ENOSPC,
|
|
"shmget(%i, %i, %i)", shmkey + maxshms, SHM_SIZE, IPC_CREAT | IPC_EXCL | SHM_RW);
|
|
}
|
|
|
|
static void setup(void)
|
|
{
|
|
int res, num;
|
|
|
|
shmkey = GETIPCKEY();
|
|
used_cnt = GET_USED_SEGMENTS();
|
|
tst_res(TINFO, "Current environment %d shared memory segments are already in use",
|
|
used_cnt);
|
|
SAFE_FILE_SCANF("/proc/sys/kernel/shmmni", "%i", &maxshms);
|
|
|
|
queues = SAFE_MALLOC((maxshms - used_cnt) * sizeof(int));
|
|
for (num = 0; num < maxshms - used_cnt; num++) {
|
|
res = shmget(shmkey + num, SHM_SIZE, IPC_CREAT | IPC_EXCL | SHM_RW);
|
|
if (res == -1)
|
|
tst_brk(TBROK | TERRNO, "shmget failed unexpectedly");
|
|
|
|
queues[queue_cnt++] = res;
|
|
}
|
|
tst_res(TINFO, "The maximum number of memory segments (%d) has been reached",
|
|
maxshms);
|
|
}
|
|
|
|
static void cleanup(void)
|
|
{
|
|
int num;
|
|
|
|
if (!queues)
|
|
return;
|
|
|
|
for (num = 0; num < queue_cnt; num++)
|
|
SAFE_SHMCTL(queues[num], IPC_RMID, NULL);
|
|
|
|
free(queues);
|
|
}
|
|
|
|
static struct tst_test test = {
|
|
.needs_tmpdir = 1,
|
|
.setup = setup,
|
|
.cleanup = cleanup,
|
|
.test_all = verify_shmget,
|
|
};
|