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Implement umount -a

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sin 2014-03-07 13:49:40 +00:00
parent 4879ea07b4
commit 7f92db7327
1 changed files with 24 additions and 3 deletions
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27
umount.c
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@ -1,23 +1,30 @@
/* See LICENSE file for copyright and license details. */ /* See LICENSE file for copyright and license details. */
#include <sys/mount.h> #include <mntent.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/mount.h>
#include "util.h" #include "util.h"
static void static void
usage(void) usage(void)
{ {
eprintf("usage: %s [-lfn] target\n", argv0); eprintf("usage: %s [-alfn] target\n", argv0);
} }
int int
main(int argc, char *argv[]) main(int argc, char *argv[])
{ {
int i; int i;
int aflag = 0;
int flags = 0; int flags = 0;
int ret = EXIT_SUCCESS; int ret = EXIT_SUCCESS;
FILE *fp;
struct mntent *me;
ARGBEGIN { ARGBEGIN {
case 'a':
aflag = 1;
break;
case 'f': case 'f':
flags |= MNT_FORCE; flags |= MNT_FORCE;
break; break;
@ -30,9 +37,23 @@ main(int argc, char *argv[])
usage(); usage();
} ARGEND; } ARGEND;
if (argc < 1) if (argc < 1 && aflag == 0)
usage(); usage();
if (aflag == 1) {
fp = setmntent("/etc/fstab", "r");
if (!fp)
eprintf("setmntent %s:", "/etc/fstab");
while ((me = getmntent(fp))) {
if (umount2(me->mnt_dir, flags) < 0) {
perror("umount2:");
ret = EXIT_FAILURE;
}
}
endmntent(fp);
return ret;
}
for (i = 0; i < argc; i++) { for (i = 0; i < argc; i++) {
if (umount2(argv[i], flags) < 0) if (umount2(argv[i], flags) < 0)
perror("umount2:"); perror("umount2:");