1 /*-
2 * Copyright (c) 2006,2008 Joseph Koshy
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <ar.h>
28 #include <assert.h>
29 #include <libelf.h>
30
31 #include "_libelf.h"
32
33 ELFTC_VCSID("$Id: elf_getident.c 3174 2015-03-27 17:13:41Z emaste $");
34
35 char *
elf_getident(Elf * e,size_t * sz)36 elf_getident(Elf *e, size_t *sz)
37 {
38
39 if (e == NULL) {
40 LIBELF_SET_ERROR(ARGUMENT, 0);
41 goto error;
42 }
43
44 if (e->e_cmd == ELF_C_WRITE && e->e_rawfile == NULL) {
45 LIBELF_SET_ERROR(SEQUENCE, 0);
46 goto error;
47 }
48
49 assert(e->e_kind != ELF_K_AR || e->e_cmd == ELF_C_READ);
50
51 if (sz) {
52 if (e->e_kind == ELF_K_AR)
53 *sz = SARMAG;
54 else if (e->e_kind == ELF_K_ELF)
55 *sz = EI_NIDENT;
56 else
57 *sz = e->e_rawsize;
58 }
59
60 return ((char *) e->e_rawfile);
61
62 error:
63 if (sz)
64 *sz = 0;
65 return (NULL);
66 }
67