1/* 2 * Copyright (c) 1981, 1983, 1993 3 * The Regents of the University of California. 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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#if 0 31#ifndef lint 32static const char copyright[] = 33"@(#) Copyright (c) 1981, 1983, 1993\n\ 34 The Regents of the University of California. All rights reserved.\n"; 35#endif /* not lint */ 36 37#ifndef lint 38static const char sccsid[] = "@(#)badsect.c 8.1 (Berkeley) 6/5/93"; 39#endif 40#endif 41#include <sys/cdefs.h> 42__FBSDID("$FreeBSD$"); 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/stat.h> 56#include <sys/disklabel.h> 57 58#include <ufs/ufs/dinode.h> 59#include <ufs/ffs/fs.h> 60 61#include <err.h> 62#include <errno.h> 63#include <dirent.h> 64#include <fcntl.h> 65#include <libufs.h> 66#include <paths.h> 67#include <stdio.h> 68#include <stdlib.h> 69#include <string.h> 70#include <unistd.h> 71 72#define sblock disk.d_fs 73#define acg disk.d_cg 74static struct uufsd disk; 75static struct fs *fs = &sblock; 76static int errs; 77 78int chkuse(daddr_t, int); 79 80static void 81usage(void) 82{ 83 fprintf(stderr, "usage: badsect bbdir blkno ...\n"); 84 exit(1); 85} 86 87int 88main(int argc, char *argv[]) 89{ 90 daddr_t diskbn; 91 daddr_t number; 92 struct stat stbuf, devstat; 93 struct dirent *dp; 94 DIR *dirp; 95 char name[2 * MAXPATHLEN]; 96 char *name_dir_end; 97 98 if (argc < 3) 99 usage(); 100 if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) 101 err(2, "%s", argv[1]); 102 strcpy(name, _PATH_DEV); 103 if ((dirp = opendir(name)) == NULL) 104 err(3, "%s", name); 105 name_dir_end = name + strlen(name); 106 while ((dp = readdir(dirp)) != NULL) { 107 strcpy(name_dir_end, dp->d_name); 108 if (lstat(name, &devstat) < 0) 109 err(4, "%s", name); 110 if (stbuf.st_dev == devstat.st_rdev && 111 (devstat.st_mode & IFMT) == IFCHR) 112 break; 113 } 114 closedir(dirp); 115 if (dp == NULL) { 116 printf("Cannot find dev 0%lo corresponding to %s\n", 117 (u_long)stbuf.st_rdev, argv[1]); 118 exit(5); 119 } 120 if (ufs_disk_fillout(&disk, name) == -1) { 121 if (disk.d_error != NULL) 122 errx(6, "%s: %s", name, disk.d_error); 123 else 124 err(7, "%s", name); 125 } 126 for (argc -= 2, argv += 2; argc > 0; argc--, argv++) { 127 number = strtol(*argv, NULL, 0); 128 if (errno == EINVAL || errno == ERANGE) 129 err(8, "%s", *argv); 130 if (chkuse(number, 1)) 131 continue; 132 /* 133 * Print a warning if converting the block number to a dev_t 134 * will truncate it. badsect was not very useful in versions 135 * of BSD before 4.4 because dev_t was 16 bits and another 136 * bit was lost by bogus sign extensions. 137 */ 138 diskbn = dbtofsb(fs, number); 139 if ((dev_t)diskbn != diskbn) { 140 printf("sector %ld cannot be represented as a dev_t\n", 141 (long)number); 142 errs++; 143 } 144 else if (mknod(*argv, IFMT|0600, (dev_t)diskbn) < 0) { 145 warn("%s", *argv); 146 errs++; 147 } 148 } 149 ufs_disk_close(&disk); 150 printf("Don't forget to run ``fsck %s''\n", name); 151 exit(errs); 152} 153 154int 155chkuse(daddr_t blkno, int cnt) 156{ 157 int cg; 158 daddr_t fsbn, bn; 159 160 fsbn = dbtofsb(fs, blkno); 161 if ((unsigned)(fsbn+cnt) > fs->fs_size) { 162 printf("block %ld out of range of file system\n", (long)blkno); 163 return (1); 164 } 165 cg = dtog(fs, fsbn); 166 if (fsbn < cgdmin(fs, cg)) { 167 if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) { 168 printf("block %ld in non-data area: cannot attach\n", 169 (long)blkno); 170 return (1); 171 } 172 } else { 173 if ((fsbn+cnt) > cgbase(fs, cg+1)) { 174 printf("block %ld in non-data area: cannot attach\n", 175 (long)blkno); 176 return (1); 177 } 178 } 179 if (cgread1(&disk, cg) != 1) { 180 fprintf(stderr, "cg %d: could not be read\n", cg); 181 errs++; 182 return (1); 183 } 184 if (!cg_chkmagic(&acg)) { 185 fprintf(stderr, "cg %d: bad magic number\n", cg); 186 errs++; 187 return (1); 188 } 189 bn = dtogd(fs, fsbn); 190 if (isclr(cg_blksfree(&acg), bn)) 191 printf("Warning: sector %ld is in use\n", (long)blkno); 192 return (0); 193} 194