Blame gnulib-tests/test-sleep.c
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/* Test of sleep() function.
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Copyright (C) 2007-2017 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
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#include <config.h>
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#include <unistd.h>
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#include "signature.h"
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SIGNATURE_CHECK (sleep, unsigned int, (unsigned int));
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#include <signal.h>
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#include "macros.h"
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#if HAVE_DECL_ALARM
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static void
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handle_alarm (int sig)
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{
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if (sig != SIGALRM)
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_exit (1);
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}
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#endif
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int
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main (void)
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{
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ASSERT (sleep (1) <= 1);
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ASSERT (sleep (0) == 0);
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#if HAVE_DECL_ALARM
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{
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const unsigned int pentecost = 50 * 24 * 60 * 60; /* 50 days. */
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unsigned int remaining;
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signal (SIGALRM, handle_alarm);
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alarm (1);
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remaining = sleep (pentecost);
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ASSERT (pentecost - 10 < remaining && remaining <= pentecost);
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}
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#endif
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return 0;
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}
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