/* $NetBSD: sleep.c,v 1.29 2019/01/27 02:00:45 christos 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 <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)sleep.c 8.3 (Berkeley) 4/2/94";
#else
__RCSID("$NetBSD: sleep.c,v 1.29 2019/01/27 02:00:45 christos Exp $");
#endif
#endif /* not lint */
#include <ctype.h>
#include <err.h>
#include <locale.h>
#include <math.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
__dead static void alarmhandle(int);
__dead static void usage(void);
static void report(const time_t, const time_t, const char *const);
static volatile sig_atomic_t report_requested;
static void
report_request(int signo __unused)
{
report_requested = 1;
}
int
main(int argc, char *argv[])
{
char *arg, *temp;
const char *msg;
double fval, ival, val;
struct timespec ntime;
time_t original;
int ch, fracflag;
unsigned delay;
setprogname(argv[0]);
(void)setlocale(LC_ALL, "");
(void)signal(SIGALRM, alarmhandle);
while ((ch = getopt(argc, argv, "")) != -1)
switch(ch) {
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.
*
* Since fracflag is set for any non-digit, we also fall
* into the floating point conversion path if the input
* is hex (the 'x' in 0xA is not a digit). Then if
* strtod() handles hex (on NetBSD it does) so will we.
* That path is also taken for scientific notation (1.2e+3)
* and when the input is simply nonsense.
*/
fracflag = 0;
arg = *argv;
for (temp = arg; *temp != '\0'; temp++)
if (!isdigit((unsigned char)*temp)) {
ch = *temp;
fracflag++;
}
if (fracflag) {
/*
* If we cannot convert the value using the user's locale
* then try again using the C locale, so strtod() can always
* parse values like 2.5, even if the user's locale uses
* a different decimal radix character (like ',')
*
* (but only if that is the potential problem)
*/
val = strtod(arg, &temp);
if (*temp != '\0')
val = strtod_l(arg, &temp, LC_C_LOCALE);
if (val < 0 || temp == arg || *temp != '\0')
usage();
ival = floor(val);
fval = (1000000000 * (val-ival));
ntime.tv_sec = ival;
if ((double)ntime.tv_sec != ival)
errx(1, "requested delay (%s) out of range", arg);
ntime.tv_nsec = fval;
if (ntime.tv_sec == 0 && ntime.tv_nsec == 0)
return EXIT_SUCCESS; /* was 0.0 or underflowed */
} else {
ntime.tv_sec = strtol(arg, &temp, 10);
if (ntime.tv_sec < 0 || temp == arg || *temp != '\0')
usage();
if (ntime.tv_sec == 0)
return EXIT_SUCCESS;
ntime.tv_nsec = 0;
}
original = ntime.tv_sec;
if (ntime.tv_nsec != 0)
msg = " and a bit";
else
msg = "";
signal(SIGINFO, report_request);
if (ntime.tv_sec <= 10000) { /* arbitrary */
while (nanosleep(&ntime, &ntime) != 0) {
if (report_requested) {
report(ntime.tv_sec, original, msg);
report_requested = 0;
} else
err(EXIT_FAILURE, "nanosleep failed");
}
} else while (ntime.tv_sec > 0) {
delay = (unsigned int)ntime.tv_sec;
if ((time_t)delay != ntime.tv_sec || delay > 30 * 86400)
delay = 30 * 86400;
ntime.tv_sec -= delay;
delay = sleep(delay);
ntime.tv_sec += delay;
if (delay != 0 && report_requested) {
report(ntime.tv_sec, original, "");
report_requested = 0;
} else
break;
}
return EXIT_SUCCESS;
/* NOTREACHED */
}
/* Reporting does not bother with nanoseconds. */
static void
report(const time_t remain, const time_t original, const char * const msg)
{
if (remain == 0)
warnx("In the final moments of the original"
" %jd%s second%s", (intmax_t)original, msg,
original == 1 && *msg == '\0' ? "" : "s");
else if (remain < 2000)
warnx("Between %jd and %jd seconds left"
" out of the original %g%s",
(intmax_t)remain, (intmax_t)remain + 1, (double)original,
msg);
else if ((original - remain) < 100000 && (original-remain) < original/8)
warnx("Have waited only %jd seconds of the original %g",
(intmax_t)(original - remain), (double)original);
else
warnx("Approximately %g seconds left out of the original %g",
(double)remain, (double)original);
}
static void
usage(void)
{
(void)fprintf(stderr, "usage: %s seconds\n", getprogname());
exit(EXIT_FAILURE);
/* NOTREACHED */
}
/* ARGSUSED */
static void
alarmhandle(int i)
{
_exit(EXIT_SUCCESS);
/* NOTREACHED */
}
