projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 83dfa04a | 1 | static char *sccsid = "@(#)umount.c 4.3 (Berkeley) %G%"; |
| cfbe3c25 BJ |
2 | #include <stdio.h> |
| 3 | #include <fstab.h> | |
| 4 | /* | |
| f0861f40 | 5 | * umount |
| cfbe3c25 BJ |
6 | */ |
| 7 | ||
| 8 | #define NMOUNT 16 | |
| 9 | #define NAMSIZ 32 | |
| 10 | ||
| 11 | struct mtab { | |
| 12 | char file[NAMSIZ]; | |
| 13 | char spec[NAMSIZ]; | |
| 14 | } mtab[NMOUNT]; | |
| 15 | ||
| 16 | main(argc, argv) | |
| 17 | char **argv; | |
| 18 | { | |
| 19 | register struct mtab *mp; | |
| 20 | register char *p1, *p2; | |
| 21 | int mf; | |
| 22 | ||
| 23 | sync(); | |
| 24 | mf = open("/etc/mtab", 0); | |
| 25 | read(mf, (char *)mtab, NMOUNT*2*NAMSIZ); | |
| 26 | if(argc != 2) { | |
| 27 | printf("arg count\n"); | |
| 28 | return(1); | |
| 29 | } | |
| 30 | if (strcmp(argv[1], "-a") == 0){ | |
| 83dfa04a BJ |
31 | if (setfsent() == 0) |
| 32 | perror(FSTAB), exit(1); | |
| 33 | umountall(); | |
| 34 | endfsent(); | |
| cfbe3c25 | 35 | } else { |
| 83dfa04a BJ |
36 | int back; |
| 37 | if (back = umountfs(argv[1])){ | |
| 38 | if (back < 0) | |
| 39 | perror("umount"); | |
| cfbe3c25 | 40 | exit(1); |
| 83dfa04a | 41 | } |
| cfbe3c25 BJ |
42 | } |
| 43 | exit(0); | |
| 44 | } | |
| 83dfa04a BJ |
45 | /* |
| 46 | * It is important to unmount the files in | |
| 47 | * reverse! order from the order they were mounted, | |
| 48 | * so that file systems mounted as children to other | |
| 49 | * file systems get removed in the right order. | |
| 50 | */ | |
| 51 | umountall() | |
| 52 | { | |
| 53 | struct fstab fs; | |
| 54 | struct fstab *fsp; | |
| 55 | if ( (fsp = getfsent()) == 0) | |
| 56 | return; | |
| 57 | fs = *fsp; /* save info locally; it is static from getfsent() */ | |
| 58 | umountall(); | |
| 59 | if (strcmp(fs.fs_file, "/") == 0) | |
| 60 | return; | |
| 61 | if (strcmp(fs.fs_type, FSTAB_RW) && | |
| 62 | strcmp(fs.fs_type, FSTAB_RO)) | |
| 63 | return; | |
| 64 | if (umountfs(fs.fs_spec) < 0) | |
| 65 | fprintf(stdout, "Unmount of special file %s FAILED\n", fs.fs_spec); | |
| 66 | else | |
| 67 | fprintf(stdout, "Unmounted special file %s\n", fs.fs_spec); | |
| 68 | fflush(stdout); | |
| 69 | } | |
| cfbe3c25 BJ |
70 | |
| 71 | int umountfs(name) | |
| 72 | char *name; | |
| 73 | { | |
| 74 | register char *p1, *p2; | |
| 75 | register struct mtab *mp; | |
| 76 | int mf; | |
| 77 | ||
| 78 | if (umount(name) < 0) { | |
| 83dfa04a | 79 | return(-1); |
| cfbe3c25 BJ |
80 | } |
| 81 | p1 = name; | |
| 82 | while(*p1++) | |
| 83 | ; | |
| 84 | p1--; | |
| 85 | while(*--p1 == '/') | |
| 86 | *p1 = '\0'; | |
| 87 | while(p1 > name && *--p1 != '/') | |
| 88 | ; | |
| 89 | if(*p1 == '/') | |
| 90 | p1++; | |
| 91 | name = p1; | |
| 92 | for (mp = mtab; mp < &mtab[NMOUNT]; mp++) { | |
| 93 | p1 = name; | |
| 94 | p2 = &mp->spec[0]; | |
| 95 | while (*p1++ == *p2) | |
| 96 | if (*p2++ == 0) { | |
| 97 | for (p1 = mp->file; p1 < &mp->file[NAMSIZ*2];) | |
| 98 | *p1++ = 0; | |
| 99 | mp = &mtab[NMOUNT]; | |
| 100 | while ((--mp)->file[0] == 0); | |
| 101 | mf = creat("/etc/mtab", 0644); | |
| 102 | write(mf, (char *)mtab, (mp-mtab+1)*2*NAMSIZ); | |
| 103 | return(0); | |
| 104 | } | |
| 105 | } | |
| 106 | printf("%s not in mount table\n", name); | |
| 107 | return(1); | |
| 108 | } |