2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Rich $alz of BBN Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 static const char copyright[] =
39 "@(#) Copyright (c) 1990, 1993\n\
40 The Regents of the University of California. All rights reserved.\n";
45 static char sccsid[] = "@(#)clri.c 8.2 (Berkeley) 9/23/93";
47 static const char rcsid[] =
51 #include <sys/param.h>
53 #include <ufs/ufs/dinode.h>
54 #include <ufs/ffs/fs.h>
66 (void)fprintf(stderr, "usage: clri filesystem inode ...\n");
78 struct dinode ibuf[MAXBSIZE / sizeof (struct dinode)];
79 long generation, bsize;
82 char *fs, sblock[SBSIZE];
89 /* get the superblock. */
90 if ((fd = open(fs, O_RDWR, 0)) < 0)
92 if (lseek(fd, (off_t)(SBLOCK * DEV_BSIZE), SEEK_SET) < 0)
94 if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock))
95 errx(1, "%s: can't read superblock", fs);
97 sbp = (struct fs *)sblock;
98 if (sbp->fs_magic != FS_MAGIC)
99 errx(1, "%s: superblock magic number 0x%x, not 0x%x",
100 fs, sbp->fs_magic, FS_MAGIC);
101 bsize = sbp->fs_bsize;
103 /* remaining arguments are inode numbers. */
105 /* get the inode number. */
106 if ((inonum = atoi(*argv)) <= 0)
107 errx(1, "%s is not a valid inode number", *argv);
108 (void)printf("clearing %d\n", inonum);
110 /* read in the appropriate block. */
111 offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */
112 offset = fsbtodb(sbp, offset); /* fs blk disk blk */
113 offset *= DEV_BSIZE; /* disk blk to bytes */
115 /* seek and read the block */
116 if (lseek(fd, offset, SEEK_SET) < 0)
118 if (read(fd, ibuf, bsize) != bsize)
121 /* get the inode within the block. */
122 ip = &ibuf[ino_to_fsbo(sbp, inonum)];
124 /* clear the inode, and bump the generation count. */
125 generation = ip->di_gen + 1;
126 memset(ip, 0, sizeof(*ip));
127 ip->di_gen = generation;
129 /* backup and write the block */
130 if (lseek(fd, (off_t)-bsize, SEEK_CUR) < 0)
132 if (write(fd, ibuf, bsize) != bsize)