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 * $FreeBSD$
21 */
22
23 /*
24 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
25 * Use is subject to license terms.
26 */
27
28 #pragma ident "@(#)mmap_exec.c 1.3 07/05/25 SMI"
29
30 #include <stdio.h>
31 #include <sys/stat.h>
32 #include <fcntl.h>
33 #include <sys/types.h>
34 #include <sys/mman.h>
35 #include <errno.h>
36
37 extern int errno;
38
39 int
main(int argc,char * argv[])40 main(int argc, char *argv[])
41 {
42 int fd;
43 struct stat statbuf;
44
45 if (argc != 2) {
46 (void) printf("Error: missing binary name.\n");
47 (void) printf("Usage:\n\t%s <binary name>\n",
48 argv[0]);
49 return (1);
50 }
51
52 errno = 0;
53
54 if ((fd = open(argv[1], O_RDONLY)) < 0) {
55 perror("open");
56 return (errno);
57 }
58 if (fstat(fd, &statbuf) < 0) {
59 perror("fstat");
60 return (errno);
61 }
62
63 if (mmap(0, statbuf.st_size,
64 PROT_EXEC, MAP_SHARED, fd, 0) == MAP_FAILED) {
65 perror("mmap");
66 return (errno);
67 }
68
69 return (0);
70 }
71