xref: /titanic_50/usr/src/cmd/sgs/libelf/common/next.c (revision 7257d1b4d25bfac0c802847390e98a464fd787ac)

/*
 * 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 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1988 AT&T	*/
/*	  All Rights Reserved  	*/

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#include "libelf.h"
#include "decl.h"


Elf_Cmd
elf_next(Elf * elf)
{
	Elf	*parent;

	if (elf == 0)
		return (ELF_C_NULL);
	ELFRLOCK(elf)
	if ((parent = elf->ed_parent) == 0) {
		ELFUNLOCK(elf);
		return (ELF_C_NULL);
	}
	ELFWLOCK(parent)
	if (elf->ed_siboff >= parent->ed_fsz) {
		ELFUNLOCK(parent)
		ELFUNLOCK(elf);
		return (ELF_C_NULL);
	}

	parent->ed_nextoff = elf->ed_siboff;
	ELFUNLOCK(parent)
	ELFUNLOCK(elf);
	return (ELF_C_READ);
}