GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: bin/sleep/sleep.c Lines: 21 40 52.5 %
Date: 2016-12-06 Branches: 10 28 35.7 %

Line Branch Exec Source
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/*	$OpenBSD: sleep.c,v 1.24 2015/10/11 20:17:49 guenther Exp $	*/
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/*	$NetBSD: sleep.c,v 1.8 1995/03/21 09:11:11 cgd Exp $	*/
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/*
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 * Copyright (c) 1988, 1993, 1994
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <ctype.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#include <err.h>
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extern char *__progname;
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void usage(void);
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void alarmh(int);
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int
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main(int argc, char *argv[])
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{
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	int ch;
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	time_t secs = 0, t;
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	char *cp;
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	long nsecs = 0;
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	struct timespec rqtp;
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	int i;
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	if (pledge("stdio wpath cpath rpath", NULL) == -1)
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		err(1, "pledge");
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	signal(SIGALRM, alarmh);
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	while ((ch = getopt(argc, argv, "")) != -1)
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		switch(ch) {
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		default:
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			usage();
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		}
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	argc -= optind;
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	argv += optind;
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	if (argc != 1)
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		usage();
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	cp = *argv;
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	while ((*cp != '\0') && (*cp != '.')) {
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		if (!isdigit((unsigned char)*cp))
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			usage();
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		t = (secs * 10) + (*cp++ - '0');
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		if (t / 10 != secs)	/* oflow */
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			return (EINVAL);
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		secs = t;
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	}
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	/* Handle fractions of a second */
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	if (*cp == '.') {
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		cp++;
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		for (i = 100000000; i > 0; i /= 10) {
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			if (*cp == '\0')
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				break;
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			if (!isdigit((unsigned char)*cp))
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				usage();
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			nsecs += (*cp++ - '0') * i;
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		}
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		/*
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		 * We parse all the way down to nanoseconds
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		 * in the above for loop. Be pedantic about
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		 * checking the rest of the argument.
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		 */
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		while (*cp != '\0') {
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			if (!isdigit((unsigned char)*cp++))
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				usage();
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		}
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	}
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	rqtp.tv_sec = secs;
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	rqtp.tv_nsec = nsecs;
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	if ((secs > 0) || (nsecs > 0))
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		if (nanosleep(&rqtp, NULL))
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			err(1, NULL);
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	return (0);
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}
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void
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usage(void)
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{
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	(void)fprintf(stderr, "usage: %s seconds\n", __progname);
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	exit(1);
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}
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/*
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 * POSIX 1003.2 says sleep should exit with 0 return code on reception
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 * of SIGALRM.
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 */
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/* ARGSUSED */
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void
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alarmh(int signo)
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{
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	/*
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	 * exit() flushes stdio buffers, which is not legal in a signal
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	 * handler. Use _exit().
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	 */
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	_exit(0);
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}