| 1 | #ifndef lint |
| 2 | static char *sccsid = "@(#)du.c 4.12 (Berkeley) %G%"; |
| 3 | #endif |
| 4 | |
| 5 | #include <stdio.h> |
| 6 | #include <sys/param.h> |
| 7 | #include <sys/stat.h> |
| 8 | #include <sys/dir.h> |
| 9 | |
| 10 | char path[BUFSIZ], name[BUFSIZ]; |
| 11 | int aflg; |
| 12 | int sflg; |
| 13 | char *dot = "."; |
| 14 | |
| 15 | #define ML 1000 |
| 16 | struct { |
| 17 | int dev; |
| 18 | ino_t ino; |
| 19 | } ml[ML]; |
| 20 | int mlx; |
| 21 | |
| 22 | long descend(); |
| 23 | char *index(), *rindex(), *strcpy(); |
| 24 | |
| 25 | #define kb(n) (howmany(dbtob(n), 1024)) |
| 26 | |
| 27 | main(argc, argv) |
| 28 | int argc; |
| 29 | char **argv; |
| 30 | { |
| 31 | long blocks = 0; |
| 32 | register char *np; |
| 33 | int pid; |
| 34 | |
| 35 | argc--, argv++; |
| 36 | again: |
| 37 | if (argc && !strcmp(*argv, "-s")) { |
| 38 | sflg++; |
| 39 | argc--, argv++; |
| 40 | goto again; |
| 41 | } |
| 42 | if (argc && !strcmp(*argv, "-a")) { |
| 43 | aflg++; |
| 44 | argc--, argv++; |
| 45 | goto again; |
| 46 | } |
| 47 | if (argc == 0) { |
| 48 | argv = ˙ |
| 49 | argc = 1; |
| 50 | } |
| 51 | do { |
| 52 | if (argc > 1) { |
| 53 | pid = fork(); |
| 54 | if (pid == -1) { |
| 55 | fprintf(stderr, "No more processes.\n"); |
| 56 | exit(1); |
| 57 | } |
| 58 | if (pid != 0) |
| 59 | wait((int *)0); |
| 60 | } |
| 61 | if (argc == 1 || pid == 0) { |
| 62 | (void) strcpy(path, *argv); |
| 63 | (void) strcpy(name, *argv); |
| 64 | if (np = rindex(name, '/')) { |
| 65 | *np++ = '\0'; |
| 66 | if (chdir(*name ? name : "/") < 0) { |
| 67 | perror(*name ? name : "/"); |
| 68 | exit(1); |
| 69 | } |
| 70 | } else |
| 71 | np = path; |
| 72 | blocks = descend(path, *np ? np : "."); |
| 73 | if (sflg) |
| 74 | printf("%ld\t%s\n", kb(blocks), path); |
| 75 | if (argc > 1) |
| 76 | exit(1); |
| 77 | } |
| 78 | argc--, argv++; |
| 79 | } while (argc > 0); |
| 80 | exit(0); |
| 81 | } |
| 82 | |
| 83 | DIR *dirp = NULL; |
| 84 | |
| 85 | long |
| 86 | descend(base, name) |
| 87 | char *base, *name; |
| 88 | { |
| 89 | char *ebase0, *ebase; |
| 90 | struct stat stb; |
| 91 | int i; |
| 92 | long blocks = 0; |
| 93 | long curoff = NULL; |
| 94 | register struct direct *dp; |
| 95 | |
| 96 | ebase0 = ebase = index(base, 0); |
| 97 | if (ebase > base && ebase[-1] == '/') |
| 98 | ebase--; |
| 99 | if (lstat(name, &stb) < 0) { |
| 100 | perror(base); |
| 101 | *ebase0 = 0; |
| 102 | return (0); |
| 103 | } |
| 104 | if (stb.st_nlink > 1 && (stb.st_mode&S_IFMT) != S_IFDIR) { |
| 105 | for (i = 0; i <= mlx; i++) |
| 106 | if (ml[i].ino == stb.st_ino && ml[i].dev == stb.st_dev) |
| 107 | return (0); |
| 108 | if (mlx < ML) { |
| 109 | ml[mlx].dev = stb.st_dev; |
| 110 | ml[mlx].ino = stb.st_ino; |
| 111 | mlx++; |
| 112 | } |
| 113 | } |
| 114 | blocks = stb.st_blocks; |
| 115 | if ((stb.st_mode&S_IFMT) != S_IFDIR) { |
| 116 | if (aflg) |
| 117 | printf("%ld\t%s\n", kb(blocks), base); |
| 118 | return (blocks); |
| 119 | } |
| 120 | if (dirp != NULL) |
| 121 | closedir(dirp); |
| 122 | dirp = opendir(name); |
| 123 | if (dirp == NULL) { |
| 124 | perror(base); |
| 125 | *ebase0 = 0; |
| 126 | return (0); |
| 127 | } |
| 128 | if (chdir(name) < 0) { |
| 129 | perror(base); |
| 130 | *ebase0 = 0; |
| 131 | closedir(dirp); |
| 132 | dirp = NULL; |
| 133 | return (0); |
| 134 | } |
| 135 | while (dp = readdir(dirp)) { |
| 136 | if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) |
| 137 | continue; |
| 138 | (void) sprintf(ebase, "/%s", dp->d_name); |
| 139 | curoff = telldir(dirp); |
| 140 | blocks += descend(base, ebase+1); |
| 141 | *ebase = 0; |
| 142 | if (dirp == NULL) { |
| 143 | dirp = opendir("."); |
| 144 | if (dirp == NULL) { |
| 145 | perror("."); |
| 146 | return (0); |
| 147 | } |
| 148 | seekdir(dirp, curoff); |
| 149 | } |
| 150 | } |
| 151 | closedir(dirp); |
| 152 | dirp = NULL; |
| 153 | if (sflg == 0) |
| 154 | printf("%ld\t%s\n", kb(blocks), base); |
| 155 | if (chdir("..") < 0) { |
| 156 | (void) sprintf(index(base, 0), "/.."); |
| 157 | perror(base); |
| 158 | exit(1); |
| 159 | } |
| 160 | *ebase0 = 0; |
| 161 | return (blocks); |
| 162 | } |