84 lines
1.5 KiB
C
84 lines
1.5 KiB
C
// 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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* test for an ENOSPC error by using up all available
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* message queues.
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*
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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;
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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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TEST(msgget(msgkey + maxmsgs, IPC_CREAT | IPC_EXCL));
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if (TST_RET != -1)
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tst_res(TFAIL, "msgget() succeeded unexpectedly");
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if (TST_ERR == ENOSPC) {
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tst_res(TPASS | TTERRNO, "msgget() failed as expected");
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} else {
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tst_res(TFAIL | TTERRNO, "msgget() failed unexpectedly,"
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" expected ENOSPC");
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}
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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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SAFE_FILE_SCANF("/proc/sys/kernel/msgmni", "%i", &maxmsgs);
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queues = SAFE_MALLOC(maxmsgs * sizeof(int));
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for (num = 0; num < maxmsgs; num++) {
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queues[num] = -1;
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res = msgget(msgkey + num, IPC_CREAT | IPC_EXCL);
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if (res != -1)
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queues[num] = 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 < maxmsgs; num++) {
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if (queues[num] != -1)
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SAFE_MSGCTL(queues[num], IPC_RMID, NULL);
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}
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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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};
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