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Annotation of 43BSDReno/sbin/badsect/badsect.c, revision 1.1

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

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