src/mkfifo.c

   1 /* mkfifo -- make fifo's (named pipes)
   2    Copyright (C) 90, 91, 1995-2000 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 /* 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 #ifdef S_ISFIFO
  47 void
  48 usage (int status)
  49 {
  50   if (status != 0)
  51     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  52              program_name);
  53   else
  54     {
  55       printf (_("Usage: %s [OPTION] NAME...\n"), program_name);
  56       printf (_("\
  57 Create named pipes (FIFOs) with the given NAMEs.\n\
  58 \n\
  59   -m, --mode=MODE   set permission mode (as in chmod), not a=rw - umask\n\
  60       --help        display this help and exit\n\
  61       --version     output version information and exit\n\
  62 "));
  63       puts (_("\nReport bugs to <bug-fileutils@gnu.org>."));
  64     }
  65   exit (status);
  66 }
  67 #endif
  68
  69 int
  70 main (int argc, char **argv)
  71 {
  72   mode_t newmode;
  73   struct mode_change *change;
  74   const char *specified_mode;
  75   int errors = 0;
  76   int optc;
  77
  78   program_name = argv[0];
  79   setlocale (LC_ALL, "");
  80   bindtextdomain (PACKAGE, LOCALEDIR);
  81   textdomain (PACKAGE);
  82
  83   atexit (close_stdout);
  84
  85   specified_mode = NULL;
  86
  87 #ifndef S_ISFIFO
  88   error (4, 0, _("fifo files not supported"));
  89 #else
  90   while ((optc = getopt_long (argc, argv, "m:", longopts, NULL)) != -1)
  91     {
  92       switch (optc)
  93         {
  94         case 0:
  95           break;
  96         case 'm':
  97           specified_mode = optarg;
  98           break;
  99         case_GETOPT_HELP_CHAR;
 100         case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
 101         default:
 102           usage (1);
 103         }
 104     }
 105
 106   if (optind == argc)
 107     {
 108       error (0, 0, _("too few arguments"));
 109       usage (1);
 110     }
 111
 112   newmode = (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
 113   if (specified_mode)
 114     {
 115       newmode &= ~ umask (0);
 116       change = mode_compile (specified_mode, 0);
 117       if (change == MODE_INVALID)
 118         error (1, 0, _("invalid mode"));
 119       else if (change == MODE_MEMORY_EXHAUSTED)
 120         xalloc_die ();
 121       newmode = mode_adjust (newmode, change);
 122     }
 123
 124   for (; optind < argc; ++optind)
 125     {
 126       int fail = mkfifo (argv[optind], newmode);
 127       if (fail)
 128         error (0, errno, _("cannot create fifo `%s'"), quote (argv[optind]));
 129
 130       /* If the containing directory happens to have a default ACL, chmod
 131          ensures the file mode permission bits are still set as desired.  */
 132
 133       if (fail == 0 && specified_mode)
 134         {
 135           fail = chmod (argv[optind], newmode);
 136           if (fail)
 137             error (0, errno, _("cannot set permissions of fifo `%s'"),
 138                    quote (argv[optind]));
 139         }
 140
 141       if (fail)
 142         errors = 1;
 143     }
 144
 145   exit (errors);
 146 #endif
 147 }