1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1988 AT&T */
28 /* All Rights Reserved */
29
30 #include <stdlib.h>
31 #include <unistd.h>
32 #include <errno.h>
33 #include "libelf.h"
34 #include "decl.h"
35 #include "msg.h"
36
37
38 /*
39 * Raw file input/output
40 * Read pieces of input files.
41 */
42
43
44 char *
_elf_read(int fd,off_t off,size_t fsz)45 _elf_read(int fd, off_t off, size_t fsz)
46 {
47 char *p;
48
49 if (fsz == 0)
50 return (0);
51
52 if (fd == -1) {
53 _elf_seterr(EREQ_NOFD, 0);
54 return (0);
55 }
56
57 if (lseek(fd, off, 0) != off) {
58 _elf_seterr(EIO_SEEK, errno);
59 return (0);
60 }
61 if ((p = (char *)malloc(fsz)) == 0) {
62 _elf_seterr(EMEM_DATA, errno);
63 return (0);
64 }
65
66 if (read(fd, p, fsz) != fsz) {
67 _elf_seterr(EIO_READ, errno);
68 free(p);
69 return (0);
70 }
71 return (p);
72 }
73