view lib/xfreopen.c @ 40086:d6de7c427079

stdopen: modernize and simplify * lib/stdopen.c: Update copyright date Do not include sys/types.h; no longer needed these days. (stdopen): Use C99-style decl in loop. Return int errno value, rather than just a bool. Do not worry about fd mismatches, since the caller cares only if 0, 1, 2 are occupied. * lib/stdopen.h: No need to include <stdbool.h>. * m4/stdopen.m4: Remove. * modules/stdopen: New file.
author Paul Eggert <eggert@cs.ucla.edu>
date Sat, 05 Jan 2019 18:02:32 -0800
parents b06060465f09
children f3ea1562945a
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/* a wrapper for freopen
   Copyright (C) 2008-2019 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 3 of the License, 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, see <https://www.gnu.org/licenses/>.  */

#include <config.h>
#include "xfreopen.h"

#include <errno.h>
#include "error.h"
#include "exitfail.h"
#include "quote.h"
#include "stdio--.h"

#include "gettext.h"
#define _(msgid) gettext (msgid)

void
xfreopen (char const *filename, char const *mode, FILE *fp)
{
  if (!freopen (filename, mode, fp))
    {
      char const *f = (filename ? filename
                       : (fp == stdin ? _("stdin")
                          : (fp == stdout ? _("stdout")
                             : (fp == stderr ? _("stderr")
                                : _("unknown stream")))));
      error (exit_failure, errno, _("failed to reopen %s with mode %s"),
             quote_n (0, f), quote_n (1, mode));
    }
}