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       puts (_("\nReport bugs to sh-utils-bugs@gnu.ai.mit.edu"));
  60     }
  61   exit (status);
  62 }
  63
  64 int
  65 main (int argc, char **argv)
  66 {
  67   int i;
  68   unsigned seconds = 0;
  69   int c;
  70
  71   program_name = argv[0];
  72   setlocale (LC_ALL, "");
  73   bindtextdomain (PACKAGE, LOCALEDIR);
  74   textdomain (PACKAGE);
  75
  76   while ((c = getopt_long (argc, argv, "", long_options, (int *) 0)) != EOF)
  77     {
  78       switch (c)
  79         {
  80         case 0:
  81           break;
  82
  83         default:
  84           usage (1);
  85         }
  86     }
  87
  88   if (show_version)
  89     {
  90       printf ("sleep (%s) %s\n", GNU_PACKAGE, VERSION);
  91       exit (0);
  92     }
  93
  94   if (show_help)
  95     usage (0);
  96
  97   if (argc == 1)
  98     {
  99       error (0, 0, _("too few arguments"));
 100       usage (1);
 101     }
 102
 103   for (i = 1; i < argc; i++)
 104     seconds += argdecode (argv[i]);
 105
 106   sleep (seconds);
 107
 108   exit (0);
 109 }
 110
 111 static long
 112 argdecode (const char *s)
 113 {
 114   long value;
 115   register const char *p = s;
 116   register char c;
 117
 118   value = 0;
 119   while ((c = *p++) >= '0' && c <= '9')
 120     value = value * 10 + c - '0';
 121
 122   switch (c)
 123     {
 124     case 's':
 125       break;
 126     case 'm':
 127       value *= 60;
 128       break;
 129     case 'h':
 130       value *= 60 * 60;
 131       break;
 132     case 'd':
 133       value *= 60 * 60 * 24;
 134       break;
 135     default:
 136       p--;
 137     }
 138
 139   if (*p)
 140     error (1, 0, _("invalid time interval `%s'"), s);
 141   return value;
 142 }