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59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
/*-
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* Copyright (c) 2006 Joseph Koshy
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <ar.h>
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#include <libelf.h>
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#include "_libelf.h"
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off_t
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elf_rand(Elf *ar, off_t offset)
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{
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struct ar_hdr *arh;
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if (ar == NULL || ar->e_kind != ELF_K_AR ||
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(offset & 1) || offset < SARMAG ||
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offset + sizeof(struct ar_hdr) >= ar->e_rawsize) {
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LIBELF_SET_ERROR(ARGUMENT, 0);
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return 0;
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}
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arh = (struct ar_hdr *) (ar->e_rawfile + offset);
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/* a too simple sanity check */
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if (arh->ar_fmag[0] != '`' || arh->ar_fmag[1] != '\n') {
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LIBELF_SET_ERROR(ARCHIVE, 0);
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return 0;
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}
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ar->e_u.e_ar.e_next = offset;
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return (offset);
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}
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