src/mkfifo.c

   1 /* mkfifo -- make fifo's (named pipes)
   2    Copyright (C) 90, 91, 95, 96, 97, 1998 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 /* Options:
  19    -m, --mode=mode      Set the mode of created fifo's to MODE, which is
  20                         symbolic as in chmod and uses the umask as a point of
  21                         departure.
  22
  23    David MacKenzie <djm@ai.mit.edu>  */
  24
  25 #include <config.h>
  26 #include <stdio.h>
  27 #include <getopt.h>
  28 #include <sys/types.h>
  29
  30 #include "system.h"
  31 #include "modechange.h"
  32 #include "closeout.h"
  33 #include "error.h"
  34
  35 /* The name this program was run with. */
  36 char *program_name;
  37
  38 /* If nonzero, display usage information and exit.  */
  39 static int show_help;
  40
  41 /* If nonzero, print the version on standard output and exit.  */
  42 static int show_version;
  43
  44 static struct option const longopts[] =
  45 {
  46   {"mode", required_argument, NULL, 'm'},
  47   {"help", no_argument, &show_help, 1},
  48   {"version", no_argument, &show_version, 1},
  49   {NULL, 0, NULL, 0}
  50 };
  51
  52 #ifdef S_ISFIFO
  53 static void
  54 usage (int status)
  55 {
  56   if (status != 0)
  57     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  58              program_name);
  59   else
  60     {
  61       printf (_("Usage: %s [OPTION] NAME...\n"), program_name);
  62       printf (_("\
  63 Create named pipes (FIFOs) with the given NAMEs.\n\
  64 \n\
  65   -m, --mode=MODE   set permission mode (as in chmod), not 0666 - umask\n\
  66       --help        display this help and exit\n\
  67       --version     output version information and exit\n\
  68 "));
  69       puts (_("\nReport bugs to <bug-fileutils@gnu.org>."));
  70       close_stdout ();
  71     }
  72   exit (status);
  73 }
  74 #endif
  75
  76 int
  77 main (int argc, char **argv)
  78 {
  79   unsigned short newmode;
  80   struct mode_change *change;
  81   char *symbolic_mode;
  82   int errors = 0;
  83   int optc;
  84
  85   program_name = argv[0];
  86   setlocale (LC_ALL, "");
  87   bindtextdomain (PACKAGE, LOCALEDIR);
  88   textdomain (PACKAGE);
  89
  90   symbolic_mode = NULL;
  91
  92 #ifndef S_ISFIFO
  93   error (4, 0, _("fifo files not supported"));
  94 #else
  95   while ((optc = getopt_long (argc, argv, "m:", longopts, NULL)) != -1)
  96     {
  97       switch (optc)
  98         {
  99         case 0:
 100           break;
 101         case 'm':
 102           symbolic_mode = optarg;
 103           break;
 104         default:
 105           usage (1);
 106         }
 107     }
 108
 109   if (show_version)
 110     {
 111       printf ("mkfifo (%s) %s\n", GNU_PACKAGE, VERSION);
 112       close_stdout ();
 113       exit (0);
 114     }
 115
 116   if (show_help)
 117     usage (0);
 118
 119   if (optind == argc)
 120     {
 121       error (0, 0, _("too few arguments"));
 122       usage (1);
 123     }
 124
 125   newmode = 0666 & ~umask (0);
 126   if (symbolic_mode)
 127     {
 128       change = mode_compile (symbolic_mode, 0);
 129       if (change == MODE_INVALID)
 130         error (1, 0, _("invalid mode"));
 131       else if (change == MODE_MEMORY_EXHAUSTED)
 132         error (1, 0, _("virtual memory exhausted"));
 133       newmode = mode_adjust (newmode, change);
 134     }
 135
 136   for (; optind < argc; ++optind)
 137     {
 138       if (mkfifo (argv[optind], newmode))
 139         {
 140           error (0, errno, _("cannot make fifo `%s'"), argv[optind]);
 141           errors = 1;
 142         }
 143     }
 144
 145   exit (errors);
 146 #endif
 147 }