/* * Copyright (c) 1981, 1983, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#) Copyright (c) 1981, 1983, 1993 The Regents of the University of California. All rights reserved. * @(#)badsect.c 8.1 (Berkeley) 6/5/93 * $FreeBSD: src/sbin/badsect/badsect.c,v 1.7.2.2 2001/07/30 10:30:04 dd Exp $ * $DragonFly: src/sbin/badsect/badsect.c,v 1.11 2006/04/03 01:58:46 dillon Exp $ */ /* * badsect * * Badsect takes a list of file-system relative sector numbers * and makes files containing the blocks of which these sectors are a part. * It can be used to contain sectors which have problems if these sectors * are not part of the bad file for the pack (see bad144). For instance, * this program can be used if the driver for the file system in question * does not support bad block forwarding. */ #include #include #include #include #include #include #include #include #include #include #include #include #include struct fs sblock, *fs; struct cg acg; int fso, fsi; int errs; long dev_bsize = 1; char buf[MAXBSIZE]; static void rdfs(daddr_t, int, char *); static int chkuse(daddr_t, int); static void usage(void); static void usage(void) { fprintf(stderr, "usage: badsect bbdir blkno ...\n"); exit(1); } int main(int argc, char **argv) { daddr_t diskbn; daddr_t number; dev_t dev; struct stat stbuf, devstat; struct dirent *dp; DIR *dirp; char name[2 * MAXPATHLEN]; if (argc < 3) usage(); if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) err(2, "%s", argv[1]); if (strlcpy(name, _PATH_DEV, sizeof(name)) >= sizeof(name)) { errno = ENAMETOOLONG; err(1, "cannot build path name"); } if ((dirp = opendir(name)) == NULL) err(3, "%s", name); while ((dp = readdir(dirp)) != NULL) { strlcpy(name, _PATH_DEV, sizeof(name)); if (strlcat(name, dp->d_name, sizeof(name)) >= sizeof(name)) { errno = ENAMETOOLONG; err(1, "cannot build path name"); } if (lstat(name, &devstat) < 0) err(4, "%s", name); if (stbuf.st_dev == devstat.st_rdev && (devstat.st_mode & IFMT) == IFCHR) break; } closedir(dirp); if (dp == NULL) { printf("Cannot find dev 0%lo corresponding to %s\n", (u_long)stbuf.st_rdev, argv[1]); exit(5); } if ((fsi = open(name, O_RDONLY)) < 0) err(6, "%s", name); fs = &sblock; rdfs(SBOFF, SBSIZE, (char *)fs); dev_bsize = fs->fs_fsize / fsbtodb(fs, 1); for (argc -= 2, argv += 2; argc > 0; argc--, argv++) { number = atol(*argv); if (chkuse(number, 1)) continue; /* * Print a warning if converting the block number to a dev_t * will truncate it. badsect was not very useful in versions * of BSD before 4.4 because dev_t was 16 bits and another * bit was lost by bogus sign extensions. */ diskbn = dbtofsb(fs, number); dev = (dev_t)diskbn; if ((daddr_t)dev != diskbn) { printf("sector %ld cannot be represented as a dev_t\n", (long)number); errs++; } else if (mknod(*argv, IFMT | 0600, dev) < 0) { warn("%s", *argv); errs++; } } printf("Don't forget to run ``fsck %s''\n", name); exit(errs); } static int chkuse(daddr_t blkno, int cnt) { int cg; daddr_t fsbn, bn; fsbn = dbtofsb(fs, blkno); if (fs->fs_size < 0 || fsbn + cnt < 0) { printf("internal error: negative fs size or block number\n"); return (1); } if (fsbn + cnt > fs->fs_size) { printf("block %ld out of range of file system\n", (long)blkno); return (1); } cg = dtog(fs, fsbn); if (fsbn < cgdmin(fs, cg)) { if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) { printf("block %ld in non-data area: cannot attach\n", (long)blkno); return (1); } } else { if ((fsbn+cnt) > cgbase(fs, cg+1)) { printf("block %ld in non-data area: cannot attach\n", (long)blkno); return (1); } } rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize, (char *)&acg); if (!cg_chkmagic(&acg)) { fprintf(stderr, "cg %d: bad magic number\n", cg); errs++; return (1); } bn = dtogd(fs, fsbn); if (isclr(cg_blksfree(&acg), bn)) printf("Warning: sector %ld is in use\n", (long)blkno); return (0); } /* * read a block from the file system */ static void rdfs(daddr_t bno, int size, char *bf) { int n; if (lseek(fsi, (off_t)bno * dev_bsize, SEEK_SET) < 0) { printf("seek error: %ld\n", (long)bno); err(1, "rdfs"); } n = read(fsi, bf, size); if (n != size) { printf("read error: %ld\n", (long)bno); err(1, "rdfs"); } }