| 1 | #ifndef lint |
| 2 | static char *sccsid = "@(#)df.c 4.16 %G%"; |
| 3 | #endif |
| 4 | |
| 5 | #include <stdio.h> |
| 6 | #include <fstab.h> |
| 7 | #include <sys/param.h> |
| 8 | #include <sys/fs.h> |
| 9 | #include <sys/stat.h> |
| 10 | |
| 11 | /* |
| 12 | * df |
| 13 | */ |
| 14 | #define NFS 20 /* Max number of filesystems */ |
| 15 | |
| 16 | struct { |
| 17 | char path[32]; |
| 18 | char spec[32]; |
| 19 | } mtab[NFS]; |
| 20 | char root[32]; |
| 21 | char *mpath(); |
| 22 | |
| 23 | int iflag; |
| 24 | |
| 25 | union { |
| 26 | struct fs iu_fs; |
| 27 | char dummy[SBSIZE]; |
| 28 | } sb; |
| 29 | #define sblock sb.iu_fs |
| 30 | |
| 31 | int fi; |
| 32 | daddr_t alloc(); |
| 33 | char *strcpy(); |
| 34 | |
| 35 | main(argc, argv) |
| 36 | int argc; |
| 37 | char **argv; |
| 38 | { |
| 39 | int i; |
| 40 | |
| 41 | while (argc > 1 && argv[1][0]=='-') { |
| 42 | switch (argv[1][1]) { |
| 43 | |
| 44 | case 'i': |
| 45 | iflag++; |
| 46 | break; |
| 47 | |
| 48 | default: |
| 49 | fprintf(stderr, "usage: df [ -i ] [ filsys... ]\n"); |
| 50 | exit(0); |
| 51 | } |
| 52 | argc--, argv++; |
| 53 | } |
| 54 | i = open("/etc/mtab", 0); |
| 55 | if (i >= 0) { |
| 56 | (void) read(i, (char *)mtab, sizeof mtab); |
| 57 | (void) close(i); |
| 58 | } |
| 59 | sync(); |
| 60 | printf("Filesystem kbytes used avail capacity"); |
| 61 | if (iflag) |
| 62 | printf(" iused ifree %%iused"); |
| 63 | printf(" Mounted on\n"); |
| 64 | if (argc <= 1) { |
| 65 | struct fstab *fsp; |
| 66 | |
| 67 | if (setfsent() == 0) |
| 68 | perror(FSTAB), exit(1); |
| 69 | while (fsp = getfsent()) { |
| 70 | if (strcmp(fsp->fs_type, FSTAB_RW) && |
| 71 | strcmp(fsp->fs_type, FSTAB_RO) && |
| 72 | strcmp(fsp->fs_type, FSTAB_RQ)) |
| 73 | continue; |
| 74 | if (root[0] == 0) |
| 75 | (void) strcpy(root, fsp->fs_spec); |
| 76 | dfree(fsp->fs_spec, 1); |
| 77 | } |
| 78 | endfsent(); |
| 79 | exit(0); |
| 80 | } |
| 81 | for (i=1; i<argc; i++) |
| 82 | dfree(argv[i], 0); |
| 83 | } |
| 84 | |
| 85 | dfree(file, infsent) |
| 86 | char *file; |
| 87 | int infsent; |
| 88 | { |
| 89 | long totalblks, availblks, avail, free, used; |
| 90 | struct stat stbuf; |
| 91 | struct fstab *fsp; |
| 92 | |
| 93 | if (stat(file, &stbuf) == 0 && |
| 94 | (stbuf.st_mode&S_IFMT) != S_IFCHR && |
| 95 | (stbuf.st_mode&S_IFMT) != S_IFBLK) { |
| 96 | if (infsent) { |
| 97 | fprintf(stderr, "%s: screwy /etc/fstab entry\n", file); |
| 98 | return; |
| 99 | } |
| 100 | setfsent(); |
| 101 | while (fsp = getfsent()) { |
| 102 | struct stat stb; |
| 103 | |
| 104 | if (stat(fsp->fs_spec, &stb) == 0 && |
| 105 | stb.st_rdev == stbuf.st_dev) { |
| 106 | file = fsp->fs_spec; |
| 107 | endfsent(); |
| 108 | goto found; |
| 109 | } |
| 110 | } |
| 111 | endfsent(); |
| 112 | fprintf(stderr, "%s: mounted on unknown device\n", file); |
| 113 | return; |
| 114 | } |
| 115 | found: |
| 116 | fi = open(file, 0); |
| 117 | if (fi < 0) { |
| 118 | perror(file); |
| 119 | return; |
| 120 | } |
| 121 | bread(SBLOCK, (char *)&sblock, SBSIZE); |
| 122 | printf("%-12.12s", file); |
| 123 | totalblks = sblock.fs_dsize; |
| 124 | free = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag + |
| 125 | sblock.fs_cstotal.cs_nffree; |
| 126 | used = totalblks - free; |
| 127 | availblks = totalblks * (100 - sblock.fs_minfree) / 100; |
| 128 | avail = availblks > used ? availblks - used : 0; |
| 129 | printf("%8d%8d%8d", totalblks * sblock.fs_fsize / 1024, |
| 130 | used * sblock.fs_fsize / 1024, avail * sblock.fs_fsize / 1024); |
| 131 | printf("%6.0f%%", |
| 132 | availblks == 0 ? 0.0 : (double) used / (double) availblks * 100.0); |
| 133 | if (iflag) { |
| 134 | int inodes = sblock.fs_ncg * sblock.fs_ipg; |
| 135 | used = inodes - sblock.fs_cstotal.cs_nifree; |
| 136 | printf("%8ld%8ld%6.0f%% ", used, sblock.fs_cstotal.cs_nifree, |
| 137 | inodes == 0 ? 0.0 : (double)used / (double)inodes * 100.0); |
| 138 | } else |
| 139 | printf(" "); |
| 140 | printf(" %s\n", mpath(file)); |
| 141 | (void) close(fi); |
| 142 | } |
| 143 | |
| 144 | long lseek(); |
| 145 | |
| 146 | bread(bno, buf, cnt) |
| 147 | daddr_t bno; |
| 148 | char *buf; |
| 149 | { |
| 150 | int n; |
| 151 | extern errno; |
| 152 | |
| 153 | (void) lseek(fi, (long)(bno * DEV_BSIZE), 0); |
| 154 | if ((n=read(fi, buf, cnt)) != cnt) { |
| 155 | printf("\nread error bno = %ld\n", bno); |
| 156 | printf("count = %d; errno = %d\n", n, errno); |
| 157 | exit(0); |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | /* |
| 162 | * Given a name like /dev/rrp0h, returns the mounted path, like /usr. |
| 163 | */ |
| 164 | char *mpath(file) |
| 165 | char *file; |
| 166 | { |
| 167 | register int i; |
| 168 | |
| 169 | if (eq(file, root)) |
| 170 | return "/"; |
| 171 | for (i=0; i<NFS; i++) |
| 172 | if (eq(file, mtab[i].spec)) |
| 173 | return (mtab[i].path); |
| 174 | return ""; |
| 175 | } |
| 176 | |
| 177 | eq(f1, f2) |
| 178 | char *f1, *f2; |
| 179 | { |
| 180 | |
| 181 | if (strncmp(f1, "/dev/", 5) == 0) |
| 182 | f1 += 5; |
| 183 | if (strncmp(f2, "/dev/", 5) == 0) |
| 184 | f2 += 5; |
| 185 | if (!strcmp(f1, f2)) |
| 186 | return (1); |
| 187 | if (*f1 == 'r' && !strcmp(f1+1, f2)) |
| 188 | return (1); |
| 189 | if (*f2 == 'r' && !strcmp(f1, f2+1)) |
| 190 | return (1); |
| 191 | if (*f1 == 'r' && *f2 == 'r' && strcmp(f1+1, f2+1) == 0) |
| 192 | return (1); |
| 193 | return (0); |
| 194 | } |