1 /* sleep - delay for a specified amount of time.
2 Copyright (C) 84, 1991-1997, 1999-2005 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
20 #include <sys/types.h>
26 #include "long-options.h"
28 #include "xnanosleep.h"
31 /* The official name of this program (e.g., no `g' prefix). */
32 #define PROGRAM_NAME "sleep"
34 #define AUTHORS "Jim Meyering", "Paul Eggert"
36 /* The name by which this program was run. */
42 if (status != EXIT_SUCCESS)
43 fprintf (stderr, _("Try `%s --help' for more information.\n"),
48 Usage: %s NUMBER[SUFFIX]...\n\
50 Pause for NUMBER seconds. SUFFIX may be `s' for seconds (the default),\n\
51 `m' for minutes, `h' for hours or `d' for days. Unlike most implementations\n\
52 that require NUMBER be an integer, here NUMBER may be an arbitrary floating\n\
53 point number. Given two or more arguments, pause for the amount of time\n\
54 specified by the sum of their values.\n\
57 program_name, program_name);
58 fputs (HELP_OPTION_DESCRIPTION, stdout);
59 fputs (VERSION_OPTION_DESCRIPTION, stdout);
60 printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
65 /* Given a floating point value *X, and a suffix character, SUFFIX_CHAR,
66 scale *X by the multiplier implied by SUFFIX_CHAR. SUFFIX_CHAR may
67 be the NUL byte or `s' to denote seconds, `m' for minutes, `h' for
68 hours, or `d' for days. If SUFFIX_CHAR is invalid, don't modify *X
69 and return false. Otherwise return true. */
72 apply_suffix (double *x, char suffix_char)
89 multiplier = 60 * 60 * 24;
101 main (int argc, char **argv)
104 double seconds = 0.0;
107 initialize_main (&argc, &argv);
108 program_name = argv[0];
109 setlocale (LC_ALL, "");
110 bindtextdomain (PACKAGE, LOCALEDIR);
111 textdomain (PACKAGE);
113 atexit (close_stdout);
115 parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
116 usage, AUTHORS, (char const *) NULL);
117 if (getopt_long (argc, argv, "", NULL, NULL) != -1)
118 usage (EXIT_FAILURE);
122 error (0, 0, _("missing operand"));
123 usage (EXIT_FAILURE);
126 for (i = optind; i < argc; i++)
130 if (! xstrtod (argv[i], &p, &s, c_strtod)
131 /* Nonnegative interval. */
133 /* No extra chars after the number and an optional s,m,h,d char. */
135 /* Check any suffix char and update S based on the suffix. */
136 || ! apply_suffix (&s, *p))
138 error (0, 0, _("invalid time interval %s"), quote (argv[i]));
146 usage (EXIT_FAILURE);
148 if (xnanosleep (seconds))
149 error (EXIT_FAILURE, errno, _("cannot read realtime clock"));