Cleanup:
[dragonfly.git] / sbin / clri / clri.c
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1/*
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rich $alz of BBN Inc.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
23 *
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
34 * SUCH DAMAGE.
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35 *
36 * @(#) Copyright (c) 1990, 1993 The Regents of the University of California. All rights reserved.
37 * @(#)clri.c 8.2 (Berkeley) 9/23/93
38 * $FreeBSD: src/sbin/clri/clri.c,v 1.4 1999/08/28 00:12:32 peter Exp $
d2e67f89 39 * $DragonFly: src/sbin/clri/clri.c,v 1.6 2005/11/06 12:08:12 swildner Exp $
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40 */
41
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42#include <sys/param.h>
43
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44#include <vfs/ufs/dinode.h>
45#include <vfs/ufs/fs.h>
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46
47#include <err.h>
48#include <fcntl.h>
49#include <stdlib.h>
50#include <string.h>
51#include <stdio.h>
52#include <unistd.h>
53
54static void
55usage(void)
56{
7cee7052 57 fprintf(stderr, "usage: clri filesystem inode ...\n");
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58 exit(1);
59}
60
61int
b5744197 62main(int argc, char **argv)
984263bc 63{
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64 struct fs *sbp;
65 struct dinode *ip;
66 int fd;
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67 struct dinode ibuf[MAXBSIZE / sizeof (struct dinode)];
68 long generation, bsize;
69 off_t offset;
70 int inonum;
71 char *fs, sblock[SBSIZE];
72
73 if (argc < 3)
74 usage();
75
76 fs = *++argv;
77
78 /* get the superblock. */
79 if ((fd = open(fs, O_RDWR, 0)) < 0)
80 err(1, "%s", fs);
81 if (lseek(fd, (off_t)(SBLOCK * DEV_BSIZE), SEEK_SET) < 0)
82 err(1, "%s", fs);
83 if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock))
84 errx(1, "%s: can't read superblock", fs);
85
86 sbp = (struct fs *)sblock;
87 if (sbp->fs_magic != FS_MAGIC)
88 errx(1, "%s: superblock magic number 0x%x, not 0x%x",
89 fs, sbp->fs_magic, FS_MAGIC);
90 bsize = sbp->fs_bsize;
91
92 /* remaining arguments are inode numbers. */
93 while (*++argv) {
94 /* get the inode number. */
95 if ((inonum = atoi(*argv)) <= 0)
96 errx(1, "%s is not a valid inode number", *argv);
7cee7052 97 printf("clearing %d\n", inonum);
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98
99 /* read in the appropriate block. */
100 offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */
101 offset = fsbtodb(sbp, offset); /* fs blk disk blk */
102 offset *= DEV_BSIZE; /* disk blk to bytes */
103
104 /* seek and read the block */
105 if (lseek(fd, offset, SEEK_SET) < 0)
106 err(1, "%s", fs);
107 if (read(fd, ibuf, bsize) != bsize)
108 err(1, "%s", fs);
109
110 /* get the inode within the block. */
111 ip = &ibuf[ino_to_fsbo(sbp, inonum)];
112
113 /* clear the inode, and bump the generation count. */
114 generation = ip->di_gen + 1;
115 memset(ip, 0, sizeof(*ip));
116 ip->di_gen = generation;
117
118 /* backup and write the block */
119 if (lseek(fd, (off_t)-bsize, SEEK_CUR) < 0)
120 err(1, "%s", fs);
121 if (write(fd, ibuf, bsize) != bsize)
122 err(1, "%s", fs);
7cee7052 123 fsync(fd);
984263bc 124 }
7cee7052 125 close(fd);
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126 exit(0);
127}