src/mkfifo.c

   1 /* mkfifo -- make fifo's (named pipes)
   2    Copyright (C) 90, 91, 1995-2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  17
  18 /* David MacKenzie <djm@ai.mit.edu>  */
  19
  20 #include <config.h>
  21 #include <stdio.h>
  22 #include <getopt.h>
  23 #include <sys/types.h>
  24
  25 #include "system.h"
  26 #include "error.h"
  27 #include "modechange.h"
  28 #include "quote.h"
  29
  30 /* The official name of this program (e.g., no `g' prefix).  */
  31 #define PROGRAM_NAME "mkfifo"
  32
  33 #define AUTHORS "David MacKenzie"
  34
  35 /* The name this program was run with. */
  36 char *program_name;
  37
  38 static struct option const longopts[] =
  39 {
  40   {"mode", required_argument, NULL, 'm'},
  41   {GETOPT_HELP_OPTION_DECL},
  42   {GETOPT_VERSION_OPTION_DECL},
  43   {NULL, 0, NULL, 0}
  44 };
  45
  46 void
  47 usage (int status)
  48 {
  49   if (status != EXIT_SUCCESS)
  50     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  51              program_name);
  52   else
  53     {
  54       printf (_("Usage: %s [OPTION] NAME...\n"), program_name);
  55       fputs (_("\
  56 Create named pipes (FIFOs) with the given NAMEs.\n\
  57 \n\
  58 "), stdout);
  59       fputs (_("\
  60 Mandatory arguments to long options are mandatory for short options too.\n\
  61 "), stdout);
  62       fputs (_("\
  63   -m, --mode=MODE   set file permission bits to MODE, not a=rw - umask\n\
  64 "), stdout);
  65       fputs (HELP_OPTION_DESCRIPTION, stdout);
  66       fputs (VERSION_OPTION_DESCRIPTION, stdout);
  67       printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
  68     }
  69   exit (status);
  70 }
  71
  72 int
  73 main (int argc, char **argv)
  74 {
  75   mode_t newmode;
  76   char const *specified_mode = NULL;
  77   int exit_status = EXIT_SUCCESS;
  78   int optc;
  79
  80   initialize_main (&argc, &argv);
  81   program_name = argv[0];
  82   setlocale (LC_ALL, "");
  83   bindtextdomain (PACKAGE, LOCALEDIR);
  84   textdomain (PACKAGE);
  85
  86   atexit (close_stdout);
  87
  88   while ((optc = getopt_long (argc, argv, "m:", longopts, NULL)) != -1)
  89     {
  90       switch (optc)
  91         {
  92         case 'm':
  93           specified_mode = optarg;
  94           break;
  95         case_GETOPT_HELP_CHAR;
  96         case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
  97         default:
  98           usage (EXIT_FAILURE);
  99         }
 100     }
 101
 102   if (optind == argc)
 103     {
 104       error (0, 0, _("missing operand"));
 105       usage (EXIT_FAILURE);
 106     }
 107
 108   newmode = (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
 109   if (specified_mode)
 110     {
 111       struct mode_change *change = mode_compile (specified_mode);
 112       if (!change)
 113         error (EXIT_FAILURE, 0, _("invalid mode"));
 114       newmode = mode_adjust (newmode, false, umask (0), change, NULL);
 115       free (change);
 116       if (newmode & ~S_IRWXUGO)
 117         error (EXIT_FAILURE, 0,
 118                _("mode must specify only file permission bits"));
 119     }
 120
 121   for (; optind < argc; ++optind)
 122     if (mkfifo (argv[optind], newmode) != 0)
 123       {
 124         error (0, errno, _("cannot create fifo %s"), quote (argv[optind]));
 125         exit_status = EXIT_FAILURE;
 126       }
 127
 128   exit (exit_status);
 129 }