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 2007 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /*
28 * Copyright (c) 2013 by Delphix. All rights reserved.
29 */
30
31 #include <stdio.h>
32 #include <sys/stat.h>
33 #include <fcntl.h>
34 #include <sys/types.h>
35 #include <sys/mman.h>
36 #include <errno.h>
37
38 extern int errno;
39
40 int
main(int argc,char * argv[])41 main(int argc, char *argv[])
42 {
43 int fd;
44 struct stat statbuf;
45
46 if (argc != 2) {
47 (void) printf("Error: missing binary name.\n");
48 (void) printf("Usage:\n\t%s <binary name>\n",
49 argv[0]);
50 return (1);
51 }
52
53 errno = 0;
54
55 if ((fd = open(argv[1], O_RDONLY)) < 0) {
56 perror("open");
57 return (errno);
58 }
59 if (fstat(fd, &statbuf) < 0) {
60 perror("fstat");
61 return (errno);
62 }
63
64 if (mmap(0, statbuf.st_size,
65 PROT_EXEC, MAP_SHARED, fd, 0) == MAP_FAILED) {
66 perror("mmap");
67 return (errno);
68 }
69
70 return (0);
71 }
72