src/sleep.c

   1 /* sleep - delay for a specified amount of time.
   2    Copyright (C) 84, 91, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
   3
   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)
   7    any later version.
   8
   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.
  13
  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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 #include <config.h>
  19 #include <stdio.h>
  20 #include <sys/types.h>
  21 #include <getopt.h>
  22
  23 #include "system.h"
  24 #include "error.h"
  25
  26 static long argdecode __P ((const char *s));
  27
  28 /* The name by which this program was run. */
  29 char *program_name;
  30
  31 /* If nonzero, display usage information and exit.  */
  32 static int show_help;
  33
  34 /* If nonzero, print the version on standard output and exit.  */
  35 static int show_version;
  36
  37 static struct option const long_options[] =
  38 {
  39   {"help", no_argument, &show_help, 1},
  40   {"version", no_argument, &show_version, 1},
  41   {0, 0, 0, 0}
  42 };
  43
  44 static void
  45 usage (int status)
  46 {
  47   if (status != 0)
  48     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  49              program_name);
  50   else
  51     {
  52       printf (_("Usage: %s [OPTION]... NUMBER[SUFFIX]\n"), program_name);
  53       printf (_("\
  54 Pause for NUMBER seconds.\n\
  55 SUFFIX may be s to keep seconds, m for minutes, h for hours or d for days.\n\
  56 \n\
  57   --help      display this help and exit\n\
  58   --version   output version information and exit\n"));
  59     }
  60   exit (status);
  61 }
  62
  63 int
  64 main (int argc, char **argv)
  65 {
  66   int i;
  67   unsigned seconds = 0;
  68   int c;
  69
  70   program_name = argv[0];
  71   setlocale (LC_ALL, "");
  72   bindtextdomain (PACKAGE, LOCALEDIR);
  73   textdomain (PACKAGE);
  74
  75   while ((c = getopt_long (argc, argv, "", long_options, (int *) 0)) != EOF)
  76     {
  77       switch (c)
  78         {
  79         case 0:
  80           break;
  81
  82         default:
  83           usage (1);
  84         }
  85     }
  86
  87   if (show_version)
  88     {
  89       printf ("sleep - %s\n", PACKAGE_VERSION);
  90       exit (0);
  91     }
  92
  93   if (show_help)
  94     usage (0);
  95
  96   if (argc == 1)
  97     {
  98       error (0, 0, _("too few arguments"));
  99       usage (1);
 100     }
 101
 102   for (i = 1; i < argc; i++)
 103     seconds += argdecode (argv[i]);
 104
 105   sleep (seconds);
 106
 107   exit (0);
 108 }
 109
 110 static long
 111 argdecode (const char *s)
 112 {
 113   long value;
 114   register const char *p = s;
 115   register char c;
 116
 117   value = 0;
 118   while ((c = *p++) >= '0' && c <= '9')
 119     value = value * 10 + c - '0';
 120
 121   switch (c)
 122     {
 123     case 's':
 124       break;
 125     case 'm':
 126       value *= 60;
 127       break;
 128     case 'h':
 129       value *= 60 * 60;
 130       break;
 131     case 'd':
 132       value *= 60 * 60 * 24;
 133       break;
 134     default:
 135       p--;
 136     }
 137
 138   if (*p)
 139     error (1, 0, _("invalid time interval `%s'"), s);
 140   return value;
 141 }