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 https://opensource.org/licenses/CDDL-1.0.
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 #include "file_common.h"
28 
29 static unsigned char bigbuffer[BIGBUFFERSIZE];
30 
31 /*
32  * Given a filename, check that the file consists entirely
33  * of a particular pattern. If the pattern is not specified a
34  * default will be used. For default values see file_common.h
35  */
36 int
37 main(int argc, char **argv)
38 {
39 	int		bigfd;
40 	long		i, n;
41 	unsigned char	fillchar = DATA;
42 	int		bigbuffersize = BIGBUFFERSIZE;
43 
44 	/*
45 	 * Validate arguments
46 	 */
47 	if (argc < 2) {
48 		(void) printf("Usage: %s filename [pattern]\n",
49 		    argv[0]);
50 		exit(1);
51 	}
52 
53 	if (argv[2]) {
54 		fillchar = atoi(argv[2]);
55 	}
56 
57 	/*
58 	 * Read the file contents and check every character
59 	 * against the supplied pattern. Abort if the
60 	 * pattern check fails.
61 	 */
62 	if ((bigfd = open(argv[1], O_RDONLY)) == -1) {
63 		(void) printf("open %s failed %d\n", argv[1], errno);
64 		exit(1);
65 	}
66 
67 	do {
68 		if ((n = read(bigfd, &bigbuffer, bigbuffersize)) == -1) {
69 			(void) printf("read failed (%ld), %d\n", n, errno);
70 			exit(errno);
71 		}
72 
73 		for (i = 0; i < n; i++) {
74 			if (bigbuffer[i] != fillchar) {
75 				(void) printf("error %s: 0x%x != 0x%x)\n",
76 				    argv[1], bigbuffer[i], fillchar);
77 				exit(1);
78 			}
79 		}
80 	} while (n == bigbuffersize);
81 
82 	return (0);
83 }
84