root/src/mkfifo.c

DEFINITIONS

1. usage
2. main

/* mkfifo -- make fifo's (named pipes)
   Copyright (C) 90, 91, 1995-2006 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

/* David MacKenzie <djm@ai.mit.edu>  */

#include <config.h>
#include <stdio.h>
#include <getopt.h>
#include <sys/types.h>

#include "system.h"
#include "error.h"
#include "modechange.h"
#include "quote.h"

/* The official name of this program (e.g., no `g' prefix).  */
#define PROGRAM_NAME "mkfifo"

#define AUTHORS "David MacKenzie"

/* The name this program was run with. */
char *program_name;

static struct option const longopts[] =
{
  {"mode", required_argument, NULL, 'm'},
  {GETOPT_HELP_OPTION_DECL},
  {GETOPT_VERSION_OPTION_DECL},
  {NULL, 0, NULL, 0}
};

void
usage (int status)
{
  if (status != EXIT_SUCCESS)
    fprintf (stderr, _("Try `%s --help' for more information.\n"),
             program_name);
  else
    {
      printf (_("Usage: %s [OPTION] NAME...\n"), program_name);
      fputs (_("\
Create named pipes (FIFOs) with the given NAMEs.\n\
\n\
"), stdout);
      fputs (_("\
Mandatory arguments to long options are mandatory for short options too.\n\
"), stdout);
      fputs (_("\
  -m, --mode=MODE   set file permission bits to MODE, not a=rw - umask\n\
"), stdout);
      fputs (HELP_OPTION_DESCRIPTION, stdout);
      fputs (VERSION_OPTION_DESCRIPTION, stdout);
      printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
    }
  exit (status);
}

int
main (int argc, char **argv)
{
  mode_t newmode;
  char const *specified_mode = NULL;
  int exit_status = EXIT_SUCCESS;
  int optc;

  initialize_main (&argc, &argv);
  program_name = argv[0];
  setlocale (LC_ALL, "");
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  atexit (close_stdout);

  while ((optc = getopt_long (argc, argv, "m:", longopts, NULL)) != -1)
    {
      switch (optc)
        {
        case 'm':
          specified_mode = optarg;
          break;
        case_GETOPT_HELP_CHAR;
        case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
        default:
          usage (EXIT_FAILURE);
        }
    }

  if (optind == argc)
    {
      error (0, 0, _("missing operand"));
      usage (EXIT_FAILURE);
    }

  newmode = (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
  if (specified_mode)
    {
      struct mode_change *change = mode_compile (specified_mode);
      if (!change)
        error (EXIT_FAILURE, 0, _("invalid mode"));
      newmode = mode_adjust (newmode, false, umask (0), change, NULL);
      free (change);
      if (newmode & ~S_IRWXUGO)
        error (EXIT_FAILURE, 0,
               _("mode must specify only file permission bits"));
    }

  for (; optind < argc; ++optind)
    if (mkfifo (argv[optind], newmode) != 0)
      {
        error (0, errno, _("cannot create fifo %s"), quote (argv[optind]));
        exit_status = EXIT_FAILURE;
      }

  exit (exit_status);
}