Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 1 | /* Read header of next archive member. |
Roland McGrath | a845f68 | 2008-12-03 03:41:58 +0000 | [diff] [blame] | 2 | Copyright (C) 1998, 1999, 2000, 2002, 2008 Red Hat, Inc. |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame] | 3 | This file is part of elfutils. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 4 | Written by Ulrich Drepper <drepper@redhat.com>, 1998. |
| 5 | |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame] | 6 | This file is free software; you can redistribute it and/or modify |
| 7 | it under the terms of either |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 8 | |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame] | 9 | * the GNU Lesser General Public License as published by the Free |
| 10 | Software Foundation; either version 3 of the License, or (at |
| 11 | your option) any later version |
| 12 | |
| 13 | or |
| 14 | |
| 15 | * the GNU General Public License as published by the Free |
| 16 | Software Foundation; either version 2 of the License, or (at |
| 17 | your option) any later version |
| 18 | |
| 19 | or both in parallel, as here. |
| 20 | |
| 21 | elfutils is distributed in the hope that it will be useful, but |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 22 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 24 | General Public License for more details. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 25 | |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame] | 26 | You should have received copies of the GNU General Public License and |
| 27 | the GNU Lesser General Public License along with this program. If |
| 28 | not, see <http://www.gnu.org/licenses/>. */ |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 29 | |
| 30 | #ifdef HAVE_CONFIG_H |
| 31 | # include <config.h> |
| 32 | #endif |
| 33 | |
| 34 | #include <assert.h> |
| 35 | #include <libelf.h> |
| 36 | #include <stddef.h> |
| 37 | |
| 38 | #include "libelfP.h" |
| 39 | |
| 40 | |
| 41 | Elf_Arhdr * |
| 42 | elf_getarhdr (elf) |
| 43 | Elf *elf; |
| 44 | { |
Roland McGrath | a845f68 | 2008-12-03 03:41:58 +0000 | [diff] [blame] | 45 | if (elf == NULL) |
| 46 | return NULL; |
| 47 | |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 48 | Elf *parent = elf->parent; |
| 49 | |
| 50 | /* Calling this function is not ok for any file type but archives. */ |
| 51 | if (parent == NULL) |
| 52 | { |
| 53 | __libelf_seterrno (ELF_E_INVALID_OP); |
| 54 | return NULL; |
| 55 | } |
| 56 | |
| 57 | /* Make sure we have read the archive header. */ |
| 58 | if (parent->state.ar.elf_ar_hdr.ar_name == NULL |
Roland McGrath | d353328 | 2008-12-10 21:42:06 -0800 | [diff] [blame] | 59 | && __libelf_next_arhdr_wrlock (parent) != 0) |
Ulrich Drepper | 02f6645 | 2008-12-04 05:58:16 +0000 | [diff] [blame] | 60 | { |
| 61 | rwlock_wrlock (parent->lock); |
| 62 | int st = __libelf_next_arhdr_wrlock (parent); |
| 63 | rwlock_unlock (parent->lock); |
| 64 | |
| 65 | if (st != 0) |
| 66 | /* Something went wrong. Maybe there is no member left. */ |
| 67 | return NULL; |
| 68 | } |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 69 | |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 70 | /* We can be sure the parent is an archive. */ |
| 71 | assert (parent->kind == ELF_K_AR); |
| 72 | |
| 73 | return &parent->state.ar.elf_ar_hdr; |
| 74 | } |