src/mkfifo.c

   1 /* mkfifo -- make fifo's (named pipes)
   2    Copyright (C) 90, 91, 1995-1999 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 /* 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 "error.h"
  32 #include "modechange.h"
  33
  34 /* The official name of this program (e.g., no `g' prefix).  */
  35 #define PROGRAM_NAME "mkfifo"
  36
  37 #define AUTHORS "David MacKenzie"
  38
  39 /* The name this program was run with. */
  40 char *program_name;
  41
  42 static struct option const longopts[] =
  43 {
  44   {"mode", required_argument, NULL, 'm'},
  45   {GETOPT_HELP_OPTION_DECL},
  46   {GETOPT_VERSION_OPTION_DECL},
  47   {NULL, 0, NULL, 0}
  48 };
  49
  50 #ifdef S_ISFIFO
  51 void
  52 usage (int status)
  53 {
  54   if (status != 0)
  55     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  56              program_name);
  57   else
  58     {
  59       printf (_("Usage: %s [OPTION] NAME...\n"), program_name);
  60       printf (_("\
  61 Create named pipes (FIFOs) with the given NAMEs.\n\
  62 \n\
  63   -m, --mode=MODE   set permission mode (as in chmod), not a=rw - umask\n\
  64       --help        display this help and exit\n\
  65       --version     output version information and exit\n\
  66 "));
  67       puts (_("\nReport bugs to <bug-fileutils@gnu.org>."));
  68       close_stdout ();
  69     }
  70   exit (status);
  71 }
  72 #endif
  73
  74 int
  75 main (int argc, char **argv)
  76 {
  77   mode_t newmode;
  78   struct mode_change *change;
  79   const char *symbolic_mode;
  80   int errors = 0;
  81   int optc;
  82
  83   program_name = argv[0];
  84   setlocale (LC_ALL, "");
  85   bindtextdomain (PACKAGE, LOCALEDIR);
  86   textdomain (PACKAGE);
  87
  88   symbolic_mode = NULL;
  89
  90 #ifndef S_ISFIFO
  91   error (4, 0, _("fifo files not supported"));
  92 #else
  93   while ((optc = getopt_long (argc, argv, "m:", longopts, NULL)) != -1)
  94     {
  95       switch (optc)
  96         {
  97         case 0:
  98           break;
  99         case 'm':
 100           symbolic_mode = optarg;
 101           break;
 102         case_GETOPT_HELP_CHAR;
 103         case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
 104         default:
 105           usage (1);
 106         }
 107     }
 108
 109   if (optind == argc)
 110     {
 111       error (0, 0, _("too few arguments"));
 112       usage (1);
 113     }
 114
 115   newmode = ((S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)
 116              & ~ umask (0));
 117   if (symbolic_mode)
 118     {
 119       change = mode_compile (symbolic_mode, 0);
 120       if (change == MODE_INVALID)
 121         error (1, 0, _("invalid mode"));
 122       else if (change == MODE_MEMORY_EXHAUSTED)
 123         error (1, 0, _("virtual memory exhausted"));
 124       newmode = mode_adjust (newmode, change);
 125     }
 126
 127   for (; optind < argc; ++optind)
 128     {
 129       if (mkfifo (argv[optind], newmode))
 130         {
 131           error (0, errno, _("cannot make fifo `%s'"), argv[optind]);
 132           errors = 1;
 133         }
 134     }
 135
 136   exit (errors);
 137 #endif
 138 }