xref: /illumos-gate/usr/src/test/zfs-tests/tests/functional/exec/mmap_exec.c (revision f38cb554a534c6df738be3f4d23327e69888e634)
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