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/*
* Mini umount implementation for busybox
*
* Copyright (C) 1998 by Erik Andersen <andersee@debian.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "internal.h"
#include <stdio.h>
#include <sys/mount.h>
#include <mntent.h>
#include <fstab.h>
#include <errno.h>
static const char umount_usage[] =
"Usage: umount filesystem\n"
" or: umount directory\n"
" or: umount -a"
"to unmount all mounted file systems.\n";
static int
umount_all()
{
int status;
struct mntent *m;
FILE *mountTable;
if ((mountTable = setmntent ("/proc/mounts", "r"))) {
while ((m = getmntent (mountTable)) != 0) {
char *blockDevice = m->mnt_fsname;
if (strcmp (blockDevice, "/dev/root") == 0)
blockDevice = (getfsfile ("/"))->fs_spec;
status=umount (m->mnt_dir);
if (status!=0) {
/* Don't bother retrying the umount on busy devices */
if (errno==EBUSY) {
perror(m->mnt_dir);
continue;
}
printf ("Trying to umount %s failed: %s\n",
m->mnt_dir, strerror(errno));
printf ("Instead trying to umount %s\n", blockDevice);
status=umount (blockDevice);
if (status!=0) {
printf ("Couldn't umount %s on %s (type %s): %s\n",
blockDevice, m->mnt_dir, m->mnt_type, strerror(errno));
}
}
}
endmntent (mountTable);
}
return( TRUE);
}
extern int
umount_main(int argc, char * * argv)
{
if (argc < 2) {
usage( umount_usage);
}
argc--;
argv++;
/* Parse any options */
while (**argv == '-') {
while (*++(*argv)) switch (**argv) {
case 'a':
exit ( umount_all() );
break;
default:
usage( umount_usage);
}
}
if ( umount(*argv) == 0 )
exit (TRUE);
else {
perror("umount");
exit( FALSE);
}
}
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