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	umount.c - ubase - suckless linux base utils
	git clone git://git.suckless.org/ubase
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	---
	umount.c (1404B)
	---
	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 }