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 (_("Usage: %s [OPTION]... NUMBER[SUFFIX]\n"), program_name);
  51       printf (_("\
  52 Pause for NUMBER seconds.\n\
  53 SUFFIX may be s to keep seconds, m for minutes, h for hours or d for days.\n\
  54 \n\
  55   --help      display this help and exit\n\
  56   --version   output version information and exit\n"));
  57       puts (_("\nReport bugs to <bug-sh-utils@gnu.org>."));
  58     }
  59   exit (status);
  60 }
  61
  62 int
  63 main (int argc, char **argv)
  64 {
  65   int i;
  66   unsigned seconds = 0;
  67   int c;
  68
  69   program_name = argv[0];
  70   setlocale (LC_ALL, "");
  71   bindtextdomain (PACKAGE, LOCALEDIR);
  72   textdomain (PACKAGE);
  73
  74   parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
  75                       AUTHORS, usage);
  76
  77   while ((c = getopt_long (argc, argv, "", long_options, NULL)) != -1)
  78     {
  79       switch (c)
  80         {
  81         case 0:
  82           break;
  83
  84         default:
  85           usage (1);
  86         }
  87     }
  88
  89   if (argc == 1)
  90     {
  91       error (0, 0, _("too few arguments"));
  92       usage (1);
  93     }
  94
  95   for (i = 1; i < argc; i++)
  96     seconds += argdecode (argv[i]);
  97
  98   sleep (seconds);
  99
 100   exit (0);
 101 }
 102
 103 static long
 104 argdecode (const char *s)
 105 {
 106   long value;
 107   register const char *p = s;
 108   register char c;
 109
 110   value = 0;
 111   while ((c = *p++) >= '0' && c <= '9')
 112     value = value * 10 + c - '0';
 113
 114   switch (c)
 115     {
 116     case 's':
 117       break;
 118     case 'm':
 119       value *= 60;
 120       break;
 121     case 'h':
 122       value *= 60 * 60;
 123       break;
 124     case 'd':
 125       value *= 60 * 60 * 24;
 126       break;
 127     default:
 128       p--;
 129     }
 130
 131   if (*p)
 132     error (1, 0, _("invalid time interval `%s'"), s);
 133   return value;
 134 }