83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2001
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*/
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/*\
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* [Description]
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*
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* Test for ENOSPC error.
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*
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* ENOSPC - All possible message queues have been taken (MSGMNI)
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*/
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/msg.h>
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#include <stdlib.h>
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#include "tst_test.h"
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#include "tst_safe_sysv_ipc.h"
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#include "libnewipc.h"
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static int maxmsgs, queue_cnt, used_cnt;
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static int *queues;
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static key_t msgkey;
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static void verify_msgget(void)
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{
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TST_EXP_FAIL2(msgget(msgkey + maxmsgs, IPC_CREAT | IPC_EXCL), ENOSPC,
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"msgget(%i, %i)", msgkey + maxmsgs, IPC_CREAT | IPC_EXCL);
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}
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static void setup(void)
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{
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int res, num;
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msgkey = GETIPCKEY();
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used_cnt = GET_USED_QUEUES();
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tst_res(TINFO, "Current environment %d message queues are already in use",
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used_cnt);
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maxmsgs = used_cnt + 32;
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SAFE_FILE_PRINTF("/proc/sys/kernel/msgmni", "%i", maxmsgs);
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queues = SAFE_MALLOC((maxmsgs - used_cnt) * sizeof(int));
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for (num = 0; num < maxmsgs - used_cnt; num++) {
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res = msgget(msgkey + num, IPC_CREAT | IPC_EXCL);
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if (res == -1)
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tst_brk(TBROK | TERRNO, "msgget failed unexpectedly");
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queues[queue_cnt++] = res;
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}
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tst_res(TINFO, "The maximum number of message queues (%d) reached",
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maxmsgs);
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}
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static void cleanup(void)
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{
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int num;
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if (!queues)
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return;
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for (num = 0; num < queue_cnt; num++)
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SAFE_MSGCTL(queues[num], IPC_RMID, NULL);
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free(queues);
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}
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static struct tst_test test = {
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.needs_tmpdir = 1,
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.setup = setup,
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.cleanup = cleanup,
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.test_all = verify_msgget,
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.save_restore = (const struct tst_path_val[]){
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{"/proc/sys/kernel/msgmni", NULL, TST_SR_TCONF},
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{}
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}
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};
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