152 lines
4.5 KiB
C
152 lines
4.5 KiB
C
/* $NetBSD: umount_default.c,v 1.1.1.1 2000/06/07 00:52:21 dogcow Exp $ */
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/*
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* Copyright (c) 1997-2000 Erez Zadok
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* Copyright (c) 1990 Jan-Simon Pendry
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* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry at Imperial College, London.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgment:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* %W% (Berkeley) %G%
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*
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* Id: umount_default.c,v 1.3 2000/01/12 16:44:56 ezk Exp
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*
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*/
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/*
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* Default method of unmounting filesystems.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif /* HAVE_CONFIG_H */
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#include <am_defs.h>
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#include <amu.h>
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int
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umount_fs(char *fs_name, const char *mnttabname)
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{
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mntlist *mlist, *mp, *mp_save = 0;
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int error = 0;
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mp = mlist = read_mtab(fs_name, mnttabname);
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/*
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* Search the mount table looking for
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* the correct (ie last) matching entry
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*/
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while (mp) {
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if (STREQ(mp->mnt->mnt_fsname, fs_name) ||
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STREQ(mp->mnt->mnt_dir, fs_name))
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mp_save = mp;
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mp = mp->mnext;
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}
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if (mp_save) {
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#ifdef DEBUG
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dlog("Trying unmount(%s)", mp_save->mnt->mnt_dir);
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#endif /* DEBUG */
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#ifdef MOUNT_TABLE_ON_FILE
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/*
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* This unmount may hang leaving this process with an exclusive lock on
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* /etc/mtab. Therefore it is necessary to unlock mtab, do the unmount,
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* then lock mtab (again) and reread it and finally update it.
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*/
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unlock_mntlist();
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#endif /* MOUNT_TABLE_ON_FILE */
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if (UNMOUNT_TRAP(mp_save->mnt) < 0) {
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switch (error = errno) {
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case EINVAL:
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case ENOTBLK:
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plog(XLOG_WARNING, "unmount: %s is not mounted", mp_save->mnt->mnt_dir);
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error = 0; /* Not really an error */
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break;
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case ENOENT:
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plog(XLOG_ERROR, "mount point %s: %m", mp_save->mnt->mnt_dir);
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error = 0; /* Not really an error (?) */
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break;
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default:
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#ifdef DEBUG
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dlog("%s: unmount: %m", mp_save->mnt->mnt_dir);
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#endif /* DEBUG */
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break;
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}
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}
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#ifdef DEBUG
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dlog("Finished unmount(%s)", mp_save->mnt->mnt_dir);
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#endif /* DEBUG */
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#ifdef MOUNT_TABLE_ON_FILE
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if (!error) {
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free_mntlist(mlist);
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mp = mlist = read_mtab(fs_name, mnttabname);
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/*
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* Search the mount table looking for
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* the correct (ie last) matching entry
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*/
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mp_save = 0;
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while (mp) {
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if (STREQ(mp->mnt->mnt_fsname, fs_name) ||
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STREQ(mp->mnt->mnt_dir, fs_name))
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mp_save = mp;
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mp = mp->mnext;
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}
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if (mp_save) {
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mnt_free(mp_save->mnt);
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mp_save->mnt = 0;
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rewrite_mtab(mlist, mnttabname);
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}
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}
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#endif /* MOUNT_TABLE_ON_FILE */
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} else {
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plog(XLOG_ERROR, "Couldn't find how to unmount %s", fs_name);
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/*
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* Assume it is already unmounted
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*/
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error = 0;
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} /* end of "if (mp_save)" statement */
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free_mntlist(mlist);
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return error;
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}
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