55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/*
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* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef _WIN32
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#include <windows.h>
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#else
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#include <unistd.h>
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#endif
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/**
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* Command line program to sleep at least given number of seconds.
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* The behavior should equivalent to the Unix sleep command.
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* Actual time sleeping may vary if interrupted, the remaining time
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* returned from sleep has limited accuracy.
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*
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* Note: the file name prefix "exe" identifies the source should be built into BasicSleep(.exe).
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*/
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int main(int argc, char** argv) {
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int seconds;
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if (argc < 2 || (seconds = atoi(argv[1])) < 0) {
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fprintf(stderr, "usage: BasicSleep <non-negative seconds>\n");
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exit(1);
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}
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#ifdef _WIN32
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Sleep(seconds * 1000);
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#else
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while ((seconds = sleep(seconds)) > 0) {
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// until no more to sleep
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}
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#endif
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}
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