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100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
/* Test for SEM_VALUE_MAX overflow detection: BZ #18434.
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Copyright (C) 2015-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <limits.h>
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#include <semaphore.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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static int
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do_test (void)
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{
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sem_t s;
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if (sem_init (&s, 0, SEM_VALUE_MAX))
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{
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printf ("sem_init: %m\n");
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return 1;
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}
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int result = 0;
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int value = 0xdeadbeef;
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if (sem_getvalue (&s, &value))
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{
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printf ("sem_getvalue: %m\n");
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result = 1;
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}
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else
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{
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printf ("sem_getvalue after init: %d\n", value);
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if (value != SEM_VALUE_MAX)
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{
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printf ("\tshould be %d\n", SEM_VALUE_MAX);
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result = 1;
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}
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}
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errno = 0;
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if (sem_post(&s) == 0)
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{
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puts ("sem_post at SEM_VALUE_MAX succeeded!");
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result = 1;
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}
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else
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{
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printf ("sem_post at SEM_VALUE_MAX: %m (%d)\n", errno);
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if (errno != EOVERFLOW)
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{
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printf ("\tshould be %s (EOVERFLOW = %d)\n",
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strerror (EOVERFLOW), EOVERFLOW);
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result = 1;
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}
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}
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value = 0xbad1d00d;
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if (sem_getvalue (&s, &value))
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{
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printf ("sem_getvalue: %m\n");
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result = 1;
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}
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else
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{
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printf ("sem_getvalue after post: %d\n", value);
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if (value != SEM_VALUE_MAX)
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{
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printf ("\tshould be %d\n", SEM_VALUE_MAX);
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result = 1;
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}
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}
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if (sem_destroy (&s))
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{
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printf ("sem_destroy: %m\n");
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result = 1;
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}
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return result;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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