umount.c - ubase - suckless linux base utils
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umount.c (1404B)
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1 /* See LICENSE file for copyright and license details. */
2 #include <sys/mount.h>
3
4 #include <mntent.h>
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include <string.h>
8
9 #include "util.h"
10
11 static int
12 umountall(int flags)
13 {
14 FILE *fp;
15 struct mntent *me;
16 int ret = 0;
17 char **mntdirs = NULL;
18 int len = 0;
19
20 fp = setmntent("/proc/mounts", "r");
21 if (!fp)
22 eprintf("setmntent %s:", "/proc/mounts");
23 while ((me = getmntent(fp))) {
24 if (strcmp(me->mnt_type, "proc") == 0)
25 continue;
26 mntdirs = erealloc(mntdirs, ++len * sizeof(*mntdirs));
27 mntdirs[len - 1] = estrdup(me->mnt_dir);
28 }
29 endmntent(fp);
30 while (--len >= 0) {
31 if (umount2(mntdirs[len], flags) < 0) {
32 weprintf("umount2 %s:", mntdirs[len]);
33 ret = 1;
34 }
35 free(mntdirs[len]);
36 }
37 free(mntdirs);
38 return ret;
39 }
40
41 static void
42 usage(void)
43 {
44 weprintf("usage: %s [-lfn] target...\n", argv0);
45 weprintf("usage: %s -a [-lfn]\n", argv0);
46 exit(1);
47 }
48
49 int
50 main(int argc, char *argv[])
51 {
52 int i;
53 int aflag = 0;
54 int flags = 0;
55 int ret = 0;
56
57 ARGBEGIN {
58 case 'a':
59 aflag = 1;
60 break;
61 case 'f':
62 flags |= MNT_FORCE;
63 break;
64 case 'l':
65 flags |= MNT_DETACH;
66 break;
67 case 'n':
68 break;
69 default:
70 usage();
71 } ARGEND;
72
73 if (argc < 1 && aflag == 0)
74 usage();
75
76 if (aflag == 1)
77 return umountall(flags);
78
79 for (i = 0; i < argc; i++) {
80 if (umount2(argv[i], flags) < 0) {
81 weprintf("umount2 %s:", argv[i]);
82 ret = 1;
83 }
84 }
85 return ret;
86 }