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74 lines
2.0 KiB
74 lines
2.0 KiB
/* Read header of next archive member.
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Copyright (C) 1998, 1999, 2000, 2002, 2008, 2015 Red Hat, Inc.
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This file is part of elfutils.
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Written by Ulrich Drepper <drepper@redhat.com>, 1998.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <assert.h>
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#include <libelf.h>
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#include <stddef.h>
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#include "libelfP.h"
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Elf_Arhdr *
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elf_getarhdr (Elf *elf)
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{
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if (elf == NULL)
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return NULL;
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Elf *parent = elf->parent;
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/* Calling this function is not ok for any file type but archives. */
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if (parent == NULL)
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{
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__libelf_seterrno (ELF_E_INVALID_OP);
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return NULL;
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}
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/* Make sure we have read the archive header. */
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if (parent->state.ar.elf_ar_hdr.ar_name == NULL
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&& __libelf_next_arhdr_wrlock (parent) != 0)
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{
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rwlock_wrlock (parent->lock);
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int st = __libelf_next_arhdr_wrlock (parent);
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rwlock_unlock (parent->lock);
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if (st != 0)
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/* Something went wrong. Maybe there is no member left. */
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return NULL;
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}
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/* We can be sure the parent is an archive. */
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assert (parent->kind == ELF_K_AR);
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return &parent->state.ar.elf_ar_hdr;
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}
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