src/sleep.c

   1 /* sleep - delay for a specified amount of time.
   2    Copyright (C) 84, 1991-1997, 1999 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 #include "long-options.h"
  26
  27 /* The official name of this program (e.g., no `g' prefix).  */
  28 #define PROGRAM_NAME "sleep"
  29
  30 #define AUTHORS "FIXME: unknown"
  31
  32 static long argdecode PARAMS ((const char *s));
  33
  34 /* The name by which this program was run. */
  35 char *program_name;
  36
  37 static struct option const long_options[] =
  38 {
  39   {0, 0, 0, 0}
  40 };
  41
  42 void
  43 usage (int status)
  44 {
  45   if (status != 0)
  46     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  47              program_name);
  48   else
  49     {
  50       printf (_("\
  51 Usage: %s NUMBER[SUFFIX]\n\
  52   or:  %s OPTION\n\
  53 Pause for NUMBER seconds.\n\
  54 SUFFIX may be s for seconds (the default), m for minutes,\n\
  55 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               program_name, program_name);
  61       puts (_("\nReport bugs to <bug-sh-utils@gnu.org>."));
  62     }
  63   exit (status);
  64 }
  65
  66 int
  67 main (int argc, char **argv)
  68 {
  69   int i;
  70   unsigned seconds = 0;
  71   int c;
  72
  73   program_name = argv[0];
  74   setlocale (LC_ALL, "");
  75   bindtextdomain (PACKAGE, LOCALEDIR);
  76   textdomain (PACKAGE);
  77
  78   parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
  79                       AUTHORS, usage);
  80
  81   while ((c = getopt_long (argc, argv, "", long_options, NULL)) != -1)
  82     {
  83       switch (c)
  84         {
  85         case 0:
  86           break;
  87
  88         default:
  89           usage (1);
  90         }
  91     }
  92
  93   if (argc == 1)
  94     {
  95       error (0, 0, _("too few arguments"));
  96       usage (1);
  97     }
  98
  99   for (i = 1; i < argc; i++)
 100     seconds += argdecode (argv[i]);
 101
 102   sleep (seconds);
 103
 104   exit (0);
 105 }
 106
 107 static long
 108 argdecode (const char *s)
 109 {
 110   long value;
 111   register const char *p = s;
 112   register char c;
 113
 114   value = 0;
 115   while ((c = *p++) >= '0' && c <= '9')
 116     value = value * 10 + c - '0';
 117
 118   switch (c)
 119     {
 120     case 's':
 121       break;
 122     case 'm':
 123       value *= 60;
 124       break;
 125     case 'h':
 126       value *= 60 * 60;
 127       break;
 128     case 'd':
 129       value *= 60 * 60 * 24;
 130       break;
 131     default:
 132       p--;
 133     }
 134
 135   if (*p)
 136     error (1, 0, _("invalid time interval `%s'"), s);
 137   return value;
 138 }