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fixmount(8) [netbsd man page]

FIXMOUNT(8)						      System Manager's Manual						       FIXMOUNT(8)

NAME
fixmount - fix remote mount entries SYNOPSIS
fixmount [ -adervq ] [ -h name ] host ... DESCRIPTION
fixmount is a variant of showmount(8) that can delete bogus mount entries in remote mountd(8) daemons. The actions specified by the options are performed for each host in turn. OPTIONS
-a -d -e These options work as in showmount(8) except that only entries pertaining to the local host are printed. -r Removes those remote mount entries on host that do not correspond to current mounts, i.e., which are left-over from a crash or are the result of improper mount protocol. The actuality of mounts is verified using the entries in /etc/mtab. -v Verify remote mounts. Similar to -r except that only a notification message is printed for each bogus entry found. The remote mount table is not changed. -A Issues a command to the remote mountd declaring that ALL of its filesystems have been unmounted. This should be used with caution, as it removes all remote mount entries pertaining to the local system, whether or not any filesystems are still mounted locally. -q Be quiet. Suppresses error messages due to timeouts and "Program not registered", i.e., due to remote hosts not supporting RPC or not running mountd. -h name Pretend the local hostname is name. This is useful after the local hostname has been changed and rmtab entries using the old name remain on a remote machine. Unfortunately, most mountd's won't be able to successfully handle removal of such entries, so this option is useful in combination with -v only. This option also saves time as comparisons of remotely recorded and local hostnames by address are avoided. FILES
/etc/mtab List of current mounts. /etc/rmtab Backup file for remote mount entries on NFS server. SEE ALSO
showmount(8), mtab(5), rmtab(5), mountd(8C). ``am-utils'' info(1) entry. Linux NFS and Automounter Administration by Erez Zadok, ISBN 0-7821-2739-8, (Sybex, 2001). http://www.am-utils.org Amd - The 4.4 BSD Automounter BUGS
No attempt is made to verify the information in /etc/mtab itself. Since swap file mounts are not recorded in /etc/mtab, a heuristic specific to SunOS is used to determine whether such a mount is actual (replacing the string "swap" with "root" and verifying the resulting path). Symbolic links on the server will cause the path in the remote entry to differ from the one in /etc/mtab. To catch those cases, a filesys- tem is also deemed mounted if its local mount point is identical to the remote entry. I.e., on a SunOS diskless client, server:/export/share/sunos.4.1.1 is actually /usr/share. Since the local mount point is /usr/share as well this will be handled correctly. There is no way to clear a stale entry in a remote mountd after the local hostname (or whatever reverse name resolution returns for it) has been changed. To take care of these cases, the remote /etc/rmtab file has to be edited and mountd restarted. The RPC timeouts for mountd calls can only be changed by recompiling. The defaults are 2 seconds for client handle creation and 5 seconds for RPC calls. AUTHORS
Andreas Stolcke <stolcke@icsi.berkeley.edu>. Erez Zadok <ezk@cs.sunysb.edu>, Computer Science Department, Stony Brook University, Stony Brook, New York, USA. Other authors and contributors to am-utils are listed in the AUTHORS file distributed with am-utils. 26 Feb 1993 FIXMOUNT(8)

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mountdtab(4)						     Kernel Interfaces Manual						      mountdtab(4)

NAME
mountdtab - Table of local file systems mounted by remote NFS clients SYNOPSIS
/etc/mountdtab DESCRIPTION
The mountdtab file resides in the /etc directory and contains a list of all remote hosts that have mounted local file systems using the NFS protocols. Whenever a client performs a remote mount, the server machine's mount daemon makes an entry in the server machine's mountdtab file. The umount command instructs the server's mount daemon to remove the entry. The umount -b command broadcasts to all servers and informs them that they should remove all entries from mountdtab created by the sender of the broadcast message. By placing an umount -b command in a system startup file, mountdtab tables on NFS servers can be purged of entries made by a crashed client, who, upon rebooting, did not remount the same file systems that it had before the system crashed. Tru64 UNIX systems automatically call umount -b at system startup The format for entries in the mountdtab file is as follows: hostname:directory Rather than rewrite the mountdtab file on each umount request, the mount daemon comments out unmounted entries by placing a number sign (#) in the first character position of the appropriate line. The mount daemon rewrites the entire file, without commented out entries, no more frequently than every 30 minutes. The frequency depends on the occurrence of umount requests. The mountdtab table is used only to preserve information between crashes and is read only by the mountd daemon when it starts up. The mountd daemon keeps an in-core table, which it uses to handle requests from programs like showmount and shutdown. RESTRICTIONS
Although the mountdtab table is close to the truth, it may contain erroneous information if NFS client machines fail to execute a umount -a command when they reboot. RELATED INFORMATION
mount(8), umount(8), mountd(8), showmount(8), shutdown(8) delim off mountdtab(4)
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