1/*-
2 * Copyright (c) 2006 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
28#include <ar.h>
29#include <assert.h>
30#include "libelf.h"
31
32#include "_libelf.h"
33
34char *
35elf_getident(Elf *e, size_t *sz)
36{
37
38        if (e == NULL) {
39                LIBELF_SET_ERROR(ARGUMENT, 0);
40                goto error;
41        }
42
43        if (e->e_cmd == ELF_C_WRITE && e->e_rawfile == NULL) {
44                LIBELF_SET_ERROR(SEQUENCE, 0);
45                goto error;
46        }
47
48        assert(e->e_kind != ELF_K_AR || e->e_cmd == ELF_C_READ);
49
50        if (sz) {
51                if (e->e_kind == ELF_K_AR)
52                        *sz = SARMAG;
53                else if (e->e_kind == ELF_K_ELF)
54                        *sz = EI_NIDENT;
55                else
56                        *sz = e->e_rawsize;
57        }
58
59        return (e->e_rawfile);
60
61 error:
62        if (sz)
63                *sz = 0;
64        return (NULL);
65}
66