xref: /onnv-gate/usr/src/lib/libbc/libc/sys/common/dup.c (revision 11798:1e7f1f154004)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/syscall.h>
#include <sys/fcntl.h>

int
dup(int fd)
{
	int ret, fds;

	if ((ret = _syscall(SYS_fcntl, fd, F_DUPFD, 0)) == -1)
		return (-1);

	if ((fds = fd_get(fd)) != -1)
		fd_add(ret, fds);

	return (ret);
}