rand.c revision 2a93c3751513f2cec775a429a244bec6f0f0a635
/*
* 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 (c) 1990, 2010, Oracle and/or its affiliates. All rights reserved.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#include "libelf.h"
#include "decl.h"
#include "msg.h"
size_t
elf_rand(Elf * elf, size_t off)
{
if (elf == 0)
return (0);
ELFWLOCK(elf)
if (elf->ed_kind != ELF_K_AR) {
_elf_seterr(EREQ_AR, 0);
ELFUNLOCK(elf)
return (0);
}
if ((off == 0) || (elf->ed_fsz < off)) {
_elf_seterr(EREQ_RAND, 0);
ELFUNLOCK(elf)
return (0);
}
elf->ed_nextoff = off;
ELFUNLOCK(elf)
return (off);
}
/*
* Private function used to obtain the current value of the next
* offset field for an archive header. Returns 0 for error, and
* the offset otherwise.
*/
size_t
_elf_getnextoff(Elf *elf)
{
size_t off;
if (elf == NULL)
return (0);
ELFWLOCK(elf)
if (elf->ed_kind != ELF_K_AR) {
_elf_seterr(EREQ_AR, 0);
ELFUNLOCK(elf)
return (0);
}
off = elf->ed_nextoff;
ELFUNLOCK(elf)
return (off);
}