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/* sleep - delay for a specified amount of time.
Copyright (C) 84, 1991-1997, 1999 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include <config.h>
#include <stdio.h>
#include <assert.h>
#include <sys/types.h>
#include <time.h>
#include <getopt.h>
#ifndef TIME_T_MAX
# define TIME_T_MAX TYPE_MAXIMUM (time_t)
#endif
#include "system.h"
#include "error.h"
#include "long-options.h"
#include "xstrtod.h"
/* The official name of this program (e.g., no `g' prefix). */
#define PROGRAM_NAME "sleep"
#define AUTHORS "Jim Meyering"
/* The name by which this program was run. */
char *program_name;
static struct option const long_options[] =
{
{0, 0, 0, 0}
};
void
usage (int status)
{
if (status != 0)
fprintf (stderr, _("Try `%s --help' for more information.\n"),
program_name);
else
{
printf (_("\
Usage: %s NUMBER[SUFFIX]...\n\
or: %s OPTION\n\
Pause for NUMBER seconds.\n\
SUFFIX may be s for seconds (the default), m for minutes,\n\
h for hours or d for days.\n\
\n\
--help display this help and exit\n\
--version output version information and exit\n\
"),
program_name, program_name);
puts (_("\nReport bugs to <bug-sh-utils@gnu.org>."));
}
exit (status);
}
/* FIXME: describe */
static int
apply_suffix (double *s, char suffix_char)
{
unsigned int multiplier;
assert (*s <= TIME_T_MAX);
switch (suffix_char)
{
case 0:
case 's':
multiplier = 1;
break;
case 'm':
multiplier = 60;
break;
case 'h':
multiplier = 60 * 60;
break;
case 'd':
multiplier = 60 * 60 * 24;
break;
default:
multiplier = 0;
}
if (multiplier == 0)
return 1;
*s *= multiplier;
return 0;
}
int
main (int argc, char **argv)
{
int i;
double seconds = 0.0;
int c;
int fail = 0;
int interrupted;
struct timespec ts;
program_name = argv[0];
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
AUTHORS, usage);
while ((c = getopt_long (argc, argv, "", long_options, NULL)) != -1)
{
switch (c)
{
case 0:
break;
default:
usage (1);
}
}
if (argc == 1)
{
error (0, 0, _("too few arguments"));
usage (1);
}
for (i = optind; i < argc; i++)
{
double s;
const char *p;
if (xstrtod (argv[i], &p, &s)
/* No negative intervals. */
|| s < 0
/* S must fit in a time_t. */
|| s > TIME_T_MAX
/* No extra chars after the number and an optional s,m,h,d char. */
|| (*p && *(p+1))
/* Check any suffix char and update S based on the suffix. */
|| apply_suffix (&s, *p)
/* Make sure the sum fits in a time_t. */
|| (seconds += s) > TIME_T_MAX
)
{
error (0, 0, _("invalid time interval `%s'"), argv[i]);
fail = 1;
}
}
if (fail)
usage (1);
/* Add this here so we end up rounding to the nearest nanosecond.
This ensures that that tv_nsec will be no larger than 999,999,999. */
seconds += .0000000005;
/* Separate whole seconds from nanoseconds. */
ts.tv_sec = seconds;
ts.tv_nsec = (seconds - ts.tv_sec) * 1000000000;
while (1)
{
struct timespec remaining;
interrupted = nanosleep (&ts, &remaining);
/* assert (!interrupted || errno == EINTR); */
if (!interrupted)
break;
ts = remaining;
}
exit (0);
}
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