1 /*
2 * Copyright (c) 1981, 1983 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #ifndef lint
35 char copyright[] =
36 "@(#) Copyright (c) 1981, 1983 The Regents of the University of California.\n\
37 All rights reserved.\n";
38 #endif /* not lint */
39
40 #ifndef lint
41 static char sccsid[] = "@(#)badsect.c 5.9 (Berkeley) 6/1/90";
42 #endif /* not lint */
43
44 /*
45 * badsect
46 *
47 * Badsect takes a list of file-system relative sector numbers
48 * and makes files containing the blocks of which these sectors are a part.
49 * It can be used to contain sectors which have problems if these sectors
50 * are not part of the bad file for the pack (see bad144). For instance,
51 * this program can be used if the driver for the file system in question
52 * does not support bad block forwarding.
53 */
54 #include <sys/param.h>
55 #include <sys/dir.h>
56 #include <sys/stat.h>
57 #include <ufs/fs.h>
58 #include <ufs/dinode.h>
59 #include <stdio.h>
60 #include <paths.h>
61
62 union {
63 struct fs fs;
64 char fsx[SBSIZE];
65 } ufs;
66 #define sblock ufs.fs
67 union {
68 struct cg cg;
69 char cgx[MAXBSIZE];
70 } ucg;
71 #define acg ucg.cg
72 struct fs *fs;
73 int fso, fsi;
74 int errs;
75 long dev_bsize = 1;
76
77 char buf[MAXBSIZE];
78
79
main(argc,argv)80 main(argc, argv)
81 int argc;
82 char *argv[];
83 {
84 daddr_t number;
85 struct stat stbuf, devstat;
86 register struct direct *dp;
87 DIR *dirp;
88 int fd;
89 char name[BUFSIZ];
90
91 if (argc < 3) {
92 fprintf(stderr, "usage: badsect bbdir blkno [ blkno ]\n");
93 exit(1);
94 }
95 if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) {
96 perror(argv[1]);
97 exit(2);
98 }
99 strcpy(name, _PATH_DEV);
100 if ((dirp = opendir(name)) == NULL) {
101 perror(name);
102 exit(3);
103 }
104 while ((dp = readdir(dirp)) != NULL) {
105 strcpy(&name[5], dp->d_name);
106 if (stat(name, &devstat) < 0) {
107 perror(name);
108 exit(4);
109 }
110 if (stbuf.st_dev == devstat.st_rdev &&
111 (devstat.st_mode & IFMT) == IFBLK)
112 break;
113 }
114 closedir(dirp);
115 if (dp == NULL) {
116 printf("Cannot find dev 0%o corresponding to %s\n",
117 stbuf.st_rdev, argv[1]);
118 exit(5);
119 }
120 if ((fsi = open(name, 0)) < 0) {
121 perror(name);
122 exit(6);
123 }
124 fs = &sblock;
125 rdfs(SBOFF, SBSIZE, (char *)fs);
126 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
127 for (argc -= 2, argv += 2; argc > 0; argc--, argv++) {
128 number = atoi(*argv);
129 if (chkuse(number, 1))
130 continue;
131 if (mknod(*argv, IFMT|0600, dbtofsb(fs, number)) < 0) {
132 perror(*argv);
133 errs++;
134 }
135 }
136 printf("Don't forget to run ``fsck %s''\n", name);
137 exit(errs);
138 }
139
chkuse(blkno,cnt)140 chkuse(blkno, cnt)
141 daddr_t blkno;
142 int cnt;
143 {
144 int cg;
145 daddr_t fsbn, bn;
146
147 fsbn = dbtofsb(fs, blkno);
148 if ((unsigned)(fsbn+cnt) > fs->fs_size) {
149 printf("block %d out of range of file system\n", blkno);
150 return (1);
151 }
152 cg = dtog(fs, fsbn);
153 if (fsbn < cgdmin(fs, cg)) {
154 if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) {
155 printf("block %d in non-data area: cannot attach\n",
156 blkno);
157 return (1);
158 }
159 } else {
160 if ((fsbn+cnt) > cgbase(fs, cg+1)) {
161 printf("block %d in non-data area: cannot attach\n",
162 blkno);
163 return (1);
164 }
165 }
166 rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize,
167 (char *)&acg);
168 if (!cg_chkmagic(&acg)) {
169 fprintf(stderr, "cg %d: bad magic number\n", cg);
170 errs++;
171 return (1);
172 }
173 bn = dtogd(fs, fsbn);
174 if (isclr(cg_blksfree(&acg), bn))
175 printf("Warning: sector %d is in use\n", blkno);
176 return (0);
177 }
178
179 /*
180 * read a block from the file system
181 */
rdfs(bno,size,bf)182 rdfs(bno, size, bf)
183 int bno, size;
184 char *bf;
185 {
186 int n;
187
188 if (lseek(fsi, bno * dev_bsize, 0) < 0) {
189 printf("seek error: %ld\n", bno);
190 perror("rdfs");
191 exit(1);
192 }
193 n = read(fsi, bf, size);
194 if(n != size) {
195 printf("read error: %ld\n", bno);
196 perror("rdfs");
197 exit(1);
198 }
199 }
200