/* $NetBSD: sleep.c,v 1.20 2005/10/17 10:11:46 elad Exp $ */ /* * Copyright (c) 1988, 1993, 1994 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #ifndef lint __COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\n\ The Regents of the University of California. All rights reserved.\n"); #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)sleep.c 8.3 (Berkeley) 4/2/94"; #else __RCSID("$NetBSD: sleep.c,v 1.20 2005/10/17 10:11:46 elad Exp $"); #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include void alarmhandle(int); void usage(void); int main(int, char *[]); int main(int argc, char *argv[]) { char *arg, *temp; double fval, ival, val; struct timespec ntime; int ch, fracflag; setprogname(argv[0]); (void)setlocale(LC_ALL, ""); (void)signal(SIGALRM, alarmhandle); while ((ch = getopt(argc, argv, "")) != -1) switch(ch) { case '?': default: usage(); } argc -= optind; argv += optind; if (argc != 1) usage(); /* * Okay, why not just use atof for everything? Why bother * checking if there is a fraction in use? Because the old * sleep handled the full range of integers, that's why, and a * double can't handle a large long. This is fairly useless * given how large a number a double can hold on most * machines, but now we won't ever have trouble. If you want * 1000000000.9 seconds of sleep, well, that's your * problem. Why use an isdigit() check instead of checking for * a period? Because doing it this way means locales will be * handled transparently by the atof code. */ fracflag = 0; arg = *argv; for (temp = arg; *temp != '\0'; temp++) if (!isdigit((unsigned char)*temp)) fracflag++; if (fracflag) { val = atof(arg); if (val <= 0) usage(); ival = floor(val); fval = (1000000000 * (val-ival)); ntime.tv_sec = ival; ntime.tv_nsec = fval; } else{ ntime.tv_sec = atol(arg); if (ntime.tv_sec <= 0) exit(0); ntime.tv_nsec = 0; } if (nanosleep(&ntime, NULL) == -1) err(1, "nanosleep failed"); exit(0); /* NOTREACHED */ } void usage(void) { (void)fprintf(stderr, "usage: %s seconds\n", getprogname()); exit(1); /* NOTREACHED */ } /* ARGSUSED */ void alarmhandle(int i) { _exit(0); /* NOTREACHED */ }