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0c60d243 WJ |
1 | /* |
2 | * Copyright (c) 1990 The Regents of the University of California. | |
3 | * 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. | |
35 | */ | |
36 | ||
37 | #ifndef lint | |
38 | char copyright[] = | |
39 | "@(#) Copyright (c) 1990 The Regents of the University of California.\n\ | |
40 | All rights reserved.\n"; | |
41 | #endif /* not lint */ | |
42 | ||
43 | #ifndef lint | |
44 | static char sccsid[] = "@(#)clri.c 5.3 (Berkeley) 6/29/91"; | |
45 | #endif /* not lint */ | |
46 | ||
47 | /* | |
48 | * clri(8) | |
49 | */ | |
50 | ||
51 | #include <sys/param.h> | |
52 | #include <ufs/quota.h> | |
53 | #include <ufs/inode.h> | |
54 | #include <ufs/fs.h> | |
55 | #include <unistd.h> | |
56 | #include <stdio.h> | |
57 | #include <fcntl.h> | |
58 | #include <errno.h> | |
59 | ||
60 | char *fs; | |
61 | ||
62 | main(argc, argv) | |
63 | int argc; | |
64 | char **argv; | |
65 | { | |
66 | register struct fs *sbp; | |
67 | register struct dinode *ip; | |
68 | register int fd; | |
69 | struct dinode ibuf[MAXBSIZE / sizeof (struct dinode)]; | |
70 | long generation, offset, bsize; | |
71 | int inonum; | |
72 | char sblock[SBSIZE]; | |
73 | ||
74 | if (argc < 3) { | |
75 | (void)fprintf(stderr, "usage: clri filesystem inode ...\n"); | |
76 | exit(1); | |
77 | } | |
78 | ||
79 | fs = *++argv; | |
80 | ||
81 | /* get the superblock. */ | |
82 | if ((fd = open(fs, O_RDWR, 0)) < 0) | |
83 | error(); | |
84 | if (lseek(fd, SBLOCK * DEV_BSIZE, SEEK_SET) < 0) | |
85 | error(); | |
86 | if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock)) { | |
87 | (void)fprintf(stderr, | |
88 | "clri: %s: can't read the superblock.\n", fs); | |
89 | exit(1); | |
90 | } | |
91 | ||
92 | sbp = (struct fs *)sblock; | |
93 | if (sbp->fs_magic != FS_MAGIC) { | |
94 | (void)fprintf(stderr, | |
95 | "clri: %s: superblock magic number 0x%x, not 0x%x.\n", | |
96 | fs, sbp->fs_magic, FS_MAGIC); | |
97 | exit(1); | |
98 | } | |
99 | bsize = sbp->fs_bsize; | |
100 | ||
101 | /* remaining arguments are inode numbers. */ | |
102 | while (*++argv) { | |
103 | /* get the inode number. */ | |
104 | if ((inonum = atoi(*argv)) <= 0) { | |
105 | (void)fprintf(stderr, | |
106 | "clri: %s is not a valid inode number.\n", *argv); | |
107 | exit(1); | |
108 | } | |
109 | (void)printf("clearing %d\n", inonum); | |
110 | ||
111 | /* read in the appropriate block. */ | |
112 | offset = itod(sbp, inonum); /* inode to fs block */ | |
113 | offset = fsbtodb(sbp, offset); /* fs block to disk block */ | |
114 | offset *= DEV_BSIZE; /* disk block to disk bytes */ | |
115 | ||
116 | /* seek and read the block */ | |
117 | if (lseek(fd, offset, SEEK_SET) < 0) | |
118 | error(); | |
119 | if (read(fd, (char *)ibuf, bsize) != bsize) | |
120 | error(); | |
121 | ||
122 | /* get the inode within the block. */ | |
123 | ip = &ibuf[itoo(sbp, inonum)]; | |
124 | ||
125 | /* clear the inode, and bump the generation count. */ | |
126 | generation = ip->di_gen + 1; | |
127 | bzero((char *)ip, sizeof *ip); | |
128 | ip->di_gen = generation; | |
129 | ||
130 | /* backup and write the block */ | |
131 | if (lseek(fd, -bsize, SEEK_CUR) < 0) | |
132 | error(); | |
133 | if (write(fd, (char *)ibuf, bsize) != bsize) | |
134 | error(); | |
135 | (void)fsync(fd); | |
136 | } | |
137 | (void)close(fd); | |
138 | exit(0); | |
139 | } | |
140 | ||
141 | error() | |
142 | { | |
143 | (void)fprintf(stderr, "clri: %s: %s\n", fs, strerror(errno)); | |
144 | exit(1); | |
145 | } |