xref: /freebsd/tests/sys/cddl/zfs/bin/file_check.c (revision edf8578117e8844e02c0121147f45e4609b30680)
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 #pragma ident	"@(#)file_check.c	1.3	07/05/25 SMI"
28 
29 #include "file_common.h"
30 
31 static unsigned char bigbuffer[BIGBUFFERSIZE];
32 
33 /*
34  * Given a filename, check that the file consists entirely
35  * of a particular pattern. If the pattern is not specified a
36  * default will be used. For default values see file_common.h
37  */
38 int
39 main(int argc, char **argv)
40 {
41 	int		bigfd;
42 	long		i, n;
43 	uint8_t		fillchar = DATA;
44 	int		bigbuffersize = BIGBUFFERSIZE;
45 	int64_t		read_count = 0;
46 
47 	/*
48 	 * Validate arguments
49 	 */
50 	if (argc < 2) {
51 		(void) printf("Usage: %s filename [pattern]\n",
52 		    argv[0]);
53 		exit(1);
54 	}
55 
56 	if (argv[2]) {
57 		fillchar = atoi(argv[2]);
58 	}
59 
60 	/*
61 	 * Read the file contents and check every character
62 	 * against the supplied pattern. Abort if the
63 	 * pattern check fails.
64 	 */
65 	if ((bigfd = open(argv[1], O_RDONLY)) == -1) {
66 		(void) printf("open %s failed %d\n", argv[1], errno);
67 		exit(1);
68 	}
69 
70 	do {
71 		if ((n = read(bigfd, &bigbuffer, bigbuffersize)) == -1) {
72 			(void) printf("read failed (%ld), %d\n", n, errno);
73 			exit(errno);
74 		}
75 
76 		for (i = 0; i < n; i++) {
77 			if (bigbuffer[i] != fillchar) {
78 				(void) printf("error %s: 0x%x != 0x%x)\n",
79 				    argv[1], bigbuffer[i], fillchar);
80 				exit(1);
81 			}
82 		}
83 
84 		read_count += n;
85 	} while (n == bigbuffersize);
86 
87 	return (0);
88 }
89