dup.c

/* dup.c: Duplicate an open file descriptor.

 Copyright (C) 2011 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 <http://www.gnu.org/licenses/>.  */

#include <config.h>

/* Specification: */
#include <unistd.h>

#include <errno.h>

#include "dup.h"
#include "msvc-inval.h"

#undef dup

#if defined(HAVE_MSVC_INVALID_PARAMETER_HANDLER) && HAVE_MSVC_INVALID_PARAMETER_HANDLER
static inline int dup_nothrow(int fd)
{
	int result;

	TRY_MSVC_INVAL
    {
		result = dup(fd);
    }
	CATCH_MSVC_INVAL
    {
		result = -1;
		errno = EBADF;
    }
	DONE_MSVC_INVAL;

	return result;
}
#else
# define dup_nothrow dup
#endif /* HAVE_MSVC_INVALID_PARAMETER_HANDLER */


int rpl_dup(int fd)
{
	int result = dup_nothrow(fd);
#if defined(REPLACE_FCHDIR) && REPLACE_FCHDIR
	if (result >= 0) {
		result = _gl_register_dup(fd, result);
	}
#endif /* REPLACE_FCHDIR */
	return result;
}

/* EOF */