144 lines
4.0 KiB
C
144 lines
4.0 KiB
C
/* $NetBSD: sleep.c,v 1.13 1998/04/09 07:03:29 fair 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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 <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)sleep.c 8.3 (Berkeley) 4/2/94";
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#else
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__RCSID("$NetBSD: sleep.c,v 1.13 1998/04/09 07:03:29 fair Exp $");
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#endif
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#endif /* not lint */
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#include <time.h>
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#include <ctype.h>
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#include <math.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 <unistd.h>
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#include <locale.h>
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void usage __P((void));
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void alarmhandle __P((int));
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int main __P((int, char *[]));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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char *arg, *temp;
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double val, ival, fval;
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struct timespec ntime;
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int fracflag;
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int ch;
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(void)setlocale(LC_ALL, "");
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(void)signal(SIGALRM, alarmhandle);
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while ((ch = getopt(argc, argv, "")) != -1)
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switch(ch) {
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case '?':
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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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/*
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* Okay, why not just use atof for everything? Why bother
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* checking if there is a fraction in use? Because the old
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* sleep handled the full range of integers, that's why, and a
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* double can't handle a large long. This is fairly useless
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* given how large a number a double can hold on most
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* machines, but now we won't ever have trouble. If you want
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* 1000000000.9 seconds of sleep, well, that's your
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* problem. Why use an isdigit() check instead of checking for
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* a period? Because doing it this way means locales will be
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* handled transparently by the atof code.
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*/
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fracflag = 0;
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arg = *argv;
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for (temp = arg; *temp != '\0'; temp++)
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if (!isdigit(*temp))
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fracflag++;
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if (fracflag) {
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val = atof(arg);
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if (val <= 0)
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exit(0);
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ival = floor(val);
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fval = (1000000000 * (val-ival));
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ntime.tv_sec = ival;
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ntime.tv_nsec = fval;
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}
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else{
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ntime.tv_sec = atol(arg);
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if (ntime.tv_sec <= 0)
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exit(0);
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ntime.tv_nsec = 0;
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}
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(void)nanosleep(&ntime, NULL);
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exit(0);
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/* NOTREACHED */
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}
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void
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usage()
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{
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(void)fputs("usage: sleep seconds\n", stderr);
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exit(1);
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}
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/* ARGSUSED */
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void
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alarmhandle(i)
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int i;
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{
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_exit(0);
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}
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