1 /* $OpenBSD: clri.c,v 1.10 2004/01/25 19:18:54 deraadt Exp $ */
2 /* $NetBSD: clri.c,v 1.9 1995/03/18 14:54:33 cgd Exp $ */
3
4 /*
5 * Copyright (c) 1990, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Rich $alz of BBN Inc.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #ifndef lint
37 static char copyright[] =
38 "@(#) Copyright (c) 1990, 1993\n\
39 The Regents of the University of California. All rights reserved.\n";
40 #endif /* not lint */
41
42 #ifndef lint
43 #if 0
44 static char sccsid[] = "@(#)clri.c 8.2 (Berkeley) 9/23/93";
45 #else
46 static char rcsid[] = "$OpenBSD: clri.c,v 1.10 2004/01/25 19:18:54 deraadt Exp $";
47 #endif
48 #endif /* not lint */
49
50 #include <sys/param.h>
51 #include <sys/time.h>
52
53 #include <ufs/ufs/dinode.h>
54 #include <ufs/ffs/fs.h>
55
56 #include <err.h>
57 #include <errno.h>
58 #include <fcntl.h>
59 #include <stdlib.h>
60 #include <string.h>
61 #include <stdio.h>
62 #include <unistd.h>
63
64 int
main(int argc,char * argv[])65 main(int argc, char *argv[])
66 {
67 struct ufs1_dinode ibuf[MAXBSIZE / sizeof (struct ufs1_dinode)];
68 char *fs, sblock[SBSIZE];
69 struct ufs1_dinode *ip;
70 struct fs *sbp;
71 int fd, inonum;
72 off_t offset;
73 size_t bsize;
74
75 if (argc < 3) {
76 fprintf(stderr, "usage: clri filesystem inode ...\n");
77 return (1);
78 }
79
80 fs = *++argv;
81
82 /* get the superblock. */
83 if ((fd = open(fs, O_RDWR, 0)) < 0)
84 err(1, "%s", fs);
85 if (lseek(fd, (off_t)(SBLOCK * DEV_BSIZE), SEEK_SET) < 0)
86 err(1, "%s", fs);
87 if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock))
88 errx(1, "%s: can't read superblock", fs);
89
90 sbp = (struct fs *)sblock;
91 if (sbp->fs_magic != FS_MAGIC)
92 errx(1, "%s: superblock magic number 0x%x, not 0x%x",
93 fs, sbp->fs_magic, FS_MAGIC);
94 bsize = sbp->fs_bsize;
95
96 /* remaining arguments are inode numbers. */
97 while (*++argv) {
98 /* get the inode number. */
99 if ((inonum = atoi(*argv)) <= 0)
100 errx(1, "%s is not a valid inode number", *argv);
101 (void)printf("clearing %d\n", inonum);
102
103 /* read in the appropriate block. */
104 offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */
105 offset = fsbtodb(sbp, offset); /* fs blk disk blk */
106 offset *= DEV_BSIZE; /* disk blk to bytes */
107
108 /* seek and read the block */
109 if (lseek(fd, offset, SEEK_SET) < 0)
110 err(1, "%s", fs);
111 if (read(fd, ibuf, bsize) != bsize)
112 err(1, "%s", fs);
113
114 /* get the inode within the block. */
115 ip = &ibuf[ino_to_fsbo(sbp, inonum)];
116
117 /* clear the inode, and bump the generation count. */
118 memset(ip, 0, sizeof(*ip));
119 ip->di_gen = arc4random();
120
121 /* backup and write the block */
122 if (lseek(fd, offset, SEEK_SET) < 0)
123 err(1, "%s", fs);
124 if (write(fd, ibuf, bsize) != bsize)
125 err(1, "%s", fs);
126 (void)fsync(fd);
127
128 if (sbp->fs_inodefmt >= FS_44INODEFMT) {
129 /* update after each inode cleared */
130 sbp->fs_clean = 0;
131 if (lseek(fd, (off_t)(SBLOCK * DEV_BSIZE), SEEK_SET) < 0)
132 err(1, "%s", fs);
133 if (write(fd, sblock, sizeof(sblock)) != sizeof(sblock))
134 errx(1, "%s: can't update superblock", fs);
135 }
136 }
137
138 return close(fd);
139 }
140