src/mkfifo.c

   1 /* mkfifo -- make fifo's (named pipes)
   2    Copyright (C) 1990, 1991, 1995 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
  16    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, 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 "error.h"
  33
  34 /* The name this program was run with. */
  35 char *program_name;
  36
  37 /* If nonzero, display usage information and exit.  */
  38 static int show_help;
  39
  40 /* If nonzero, print the version on standard output and exit.  */
  41 static int show_version;
  42
  43 static struct option const longopts[] =
  44 {
  45   {"mode", required_argument, NULL, 'm'},
  46   {"help", no_argument, &show_help, 1},
  47   {"version", no_argument, &show_version, 1},
  48   {NULL, 0, NULL, 0}
  49 };
  50
  51 #ifdef S_ISFIFO
  52 static void
  53 usage (int status)
  54 {
  55   if (status != 0)
  56     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  57              program_name);
  58   else
  59     {
  60       printf (_("Usage: %s [OPTION] NAME...\n"), program_name);
  61       printf (_("\
  62 Create named pipes (FIFOs) with the given NAMEs.\n\
  63 \n\
  64   -m, --mode=MODE   set permission mode (as in chmod), not 0666 - umask\n\
  65       --help        display this help and exit\n\
  66       --version     output version information and exit\n"));
  67     }
  68   exit (status);
  69 }
  70 #endif
  71
  72 void
  73 main (int argc, char **argv)
  74 {
  75   unsigned short newmode;
  76   struct mode_change *change;
  77   char *symbolic_mode;
  78   int errors = 0;
  79   int optc;
  80
  81   program_name = argv[0];
  82   setlocale (LC_ALL, "");
  83   bindtextdomain (PACKAGE, LOCALEDIR);
  84   textdomain (PACKAGE);
  85
  86   symbolic_mode = NULL;
  87
  88 #ifndef S_ISFIFO
  89   error (4, 0, _("fifo files not supported"));
  90 #else
  91   while ((optc = getopt_long (argc, argv, "m:", longopts, (int *) 0)) != EOF)
  92     {
  93       switch (optc)
  94         {
  95         case 0:
  96           break;
  97         case 'm':
  98           symbolic_mode = optarg;
  99           break;
 100         default:
 101           usage (1);
 102         }
 103     }
 104
 105   if (show_version)
 106     {
 107       printf ("mkfifo - %s\n", PACKAGE_VERSION);
 108       exit (0);
 109     }
 110
 111   if (show_help)
 112     usage (0);
 113
 114   if (optind == argc)
 115     {
 116       error (0, 0, _("too few arguments"));
 117       usage (1);
 118     }
 119
 120   newmode = 0666 & ~umask (0);
 121   if (symbolic_mode)
 122     {
 123       change = mode_compile (symbolic_mode, 0);
 124       if (change == MODE_INVALID)
 125         error (1, 0, _("invalid mode"));
 126       else if (change == MODE_MEMORY_EXHAUSTED)
 127         error (1, 0, _("virtual memory exhausted"));
 128       newmode = mode_adjust (newmode, change);
 129     }
 130
 131   for (; optind < argc; ++optind)
 132     {
 133       if (mkfifo (argv[optind], newmode))
 134         {
 135           error (0, errno, _("cannot make fifo `%s'"), argv[optind]);
 136           errors = 1;
 137         }
 138     }
 139
 140   exit (errors);
 141 #endif
 142 }