| 1 | static char sccsid[] = "@(#)clri.c 2.2 %G%"; |
| 2 | |
| 3 | /* static char *sccsid = "@(#)clri.c 4.1 (Berkeley) 10/1/80"; */ |
| 4 | |
| 5 | /* |
| 6 | * clri filsys inumber ... |
| 7 | */ |
| 8 | |
| 9 | #ifndef SIMFS |
| 10 | #include <sys/param.h> |
| 11 | #include <sys/inode.h> |
| 12 | #include <sys/fs.h> |
| 13 | #else |
| 14 | #include "../h/param.h" |
| 15 | #include "../h/inode.h" |
| 16 | #include "../h/fs.h" |
| 17 | #endif |
| 18 | |
| 19 | #define ISIZE (sizeof(struct dinode)) |
| 20 | #define NI (MAXBSIZE/ISIZE) |
| 21 | struct ino { |
| 22 | char junk[ISIZE]; |
| 23 | }; |
| 24 | struct ino buf[NI]; |
| 25 | |
| 26 | union { |
| 27 | char dummy[SBSIZE]; |
| 28 | struct fs sblk; |
| 29 | } sb_un; |
| 30 | #define sblock sb_un.sblk |
| 31 | |
| 32 | int status; |
| 33 | |
| 34 | main(argc, argv) |
| 35 | int argc; |
| 36 | char *argv[]; |
| 37 | { |
| 38 | register i, f; |
| 39 | unsigned n; |
| 40 | int j, k; |
| 41 | long off; |
| 42 | |
| 43 | if (argc < 3) { |
| 44 | printf("usage: clri filsys inumber ...\n"); |
| 45 | exit(4); |
| 46 | } |
| 47 | f = open(argv[1], 2); |
| 48 | if (f < 0) { |
| 49 | printf("cannot open %s\n", argv[1]); |
| 50 | exit(4); |
| 51 | } |
| 52 | lseek(f, SBLOCK * DEV_BSIZE, 0); |
| 53 | if (read(f, &sblock, SBSIZE) != SBSIZE) { |
| 54 | printf("cannot read %s\n", argv[1]); |
| 55 | exit(4); |
| 56 | } |
| 57 | if (sblock.fs_magic != FS_MAGIC) { |
| 58 | printf("bad super block magic number\n"); |
| 59 | exit(4); |
| 60 | } |
| 61 | for (i = 2; i < argc; i++) { |
| 62 | if (!isnumber(argv[i])) { |
| 63 | printf("%s: is not a number\n", argv[i]); |
| 64 | status = 1; |
| 65 | continue; |
| 66 | } |
| 67 | n = atoi(argv[i]); |
| 68 | if (n == 0) { |
| 69 | printf("%s: is zero\n", argv[i]); |
| 70 | status = 1; |
| 71 | continue; |
| 72 | } |
| 73 | off = fsbtodb(&sblock, itod(&sblock, n)) * DEV_BSIZE; |
| 74 | lseek(f, off, 0); |
| 75 | if (read(f, (char *)buf, sblock.fs_bsize) != sblock.fs_bsize) { |
| 76 | printf("%s: read error\n", argv[i]); |
| 77 | status = 1; |
| 78 | } |
| 79 | } |
| 80 | if (status) |
| 81 | exit(status); |
| 82 | for (i = 2; i < argc; i++) { |
| 83 | n = atoi(argv[i]); |
| 84 | printf("clearing %u\n", n); |
| 85 | off = fsbtodb(&sblock, itod(&sblock, n)) * DEV_BSIZE; |
| 86 | lseek(f, off, 0); |
| 87 | read(f, (char *)buf, sblock.fs_bsize); |
| 88 | j = itoo(&sblock, n); |
| 89 | for (k = 0; k < ISIZE; k++) |
| 90 | buf[j].junk[k] = 0; |
| 91 | lseek(f, off, 0); |
| 92 | write(f, (char *)buf, sblock.fs_bsize); |
| 93 | } |
| 94 | exit(status); |
| 95 | } |
| 96 | |
| 97 | isnumber(s) |
| 98 | char *s; |
| 99 | { |
| 100 | register c; |
| 101 | |
| 102 | while(c = *s++) |
| 103 | if (c < '0' || c > '9') |
| 104 | return(0); |
| 105 | return(1); |
| 106 | } |