| 1 | #include <stdio.h> |
| 2 | #include <sys/param.h> |
| 3 | #include <sys/filsys.h> |
| 4 | #include <sys/fblk.h> |
| 5 | |
| 6 | daddr_t blkno = 1; |
| 7 | char *dargv[] = { |
| 8 | 0, |
| 9 | "/dev/rp0", |
| 10 | "/dev/rp3", |
| 11 | 0 |
| 12 | }; |
| 13 | |
| 14 | |
| 15 | struct filsys sblock; |
| 16 | |
| 17 | int fi; |
| 18 | daddr_t alloc(); |
| 19 | |
| 20 | main(argc, argv) |
| 21 | char **argv; |
| 22 | { |
| 23 | int i; |
| 24 | |
| 25 | if(argc <= 1) { |
| 26 | for(argc = 1; dargv[argc]; argc++); |
| 27 | argv = dargv; |
| 28 | } |
| 29 | |
| 30 | for(i=1; i<argc; i++) { |
| 31 | dfree(argv[i]); |
| 32 | } |
| 33 | } |
| 34 | |
| 35 | dfree(file) |
| 36 | char *file; |
| 37 | { |
| 38 | daddr_t i; |
| 39 | |
| 40 | fi = open(file, 0); |
| 41 | if(fi < 0) { |
| 42 | fprintf(stderr,"cannot open %s\n", file); |
| 43 | return; |
| 44 | } |
| 45 | sync(); |
| 46 | bread(1L, (char *)&sblock, sizeof(sblock)); |
| 47 | i = 0; |
| 48 | while(alloc()) |
| 49 | i++; |
| 50 | printf("%s %D\n", file, i); |
| 51 | close(fi); |
| 52 | } |
| 53 | |
| 54 | daddr_t |
| 55 | alloc() |
| 56 | { |
| 57 | int i; |
| 58 | daddr_t b; |
| 59 | struct fblk buf; |
| 60 | |
| 61 | i = --sblock.s_nfree; |
| 62 | if(i<0 || i>=NICFREE) { |
| 63 | printf("bad free count, b=%D\n", blkno); |
| 64 | return(0); |
| 65 | } |
| 66 | b = sblock.s_free[i]; |
| 67 | if(b == 0) |
| 68 | return(0); |
| 69 | if(b<sblock.s_isize || b>=sblock.s_fsize) { |
| 70 | printf("bad free block (%D)\n", b); |
| 71 | return(0); |
| 72 | } |
| 73 | if(sblock.s_nfree <= 0) { |
| 74 | bread(b, (char *)&buf, sizeof(buf)); |
| 75 | blkno = b; |
| 76 | sblock.s_nfree = buf.df_nfree; |
| 77 | for(i=0; i<NICFREE; i++) |
| 78 | sblock.s_free[i] = buf.df_free[i]; |
| 79 | } |
| 80 | return(b); |
| 81 | } |
| 82 | |
| 83 | bread(bno, buf, cnt) |
| 84 | daddr_t bno; |
| 85 | char *buf; |
| 86 | { |
| 87 | int n; |
| 88 | extern errno; |
| 89 | |
| 90 | lseek(fi, bno<<BSHIFT, 0); |
| 91 | if((n=read(fi, buf, cnt)) != cnt) { |
| 92 | printf("read error %D\n", bno); |
| 93 | printf("count = %d; errno = %d\n", n, errno); |
| 94 | exit(0); |
| 95 | } |
| 96 | } |