xref: /freebsd/usr.sbin/rpc.umntall/rpc.umntall.8 (revision 490d5836b5ab0c76675986696b1637fff97dfae2)

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.\" Copyright (c) 1999 Martin Blapp
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.Dd November 17, 1999
.Dt RPC.UMNTALL 8
.Os
.Sh NAME
.Nm rpc.umntall
.Nd notify NFS servers about unmounted NFS filesystems
.Sh SYNOPSIS
.Nm
.Op Fl e Ar expire
.Op Fl h Ar host
.Op Fl k
.Op Fl p Ar remotepath
.Op Fl v
.Sh DESCRIPTION
The
.Nm
utility is proposed in the
.Tn NFS
RPC specification; see
.Rs
.%T "NFS Version 3 Protocol Specification"
.%O "RFC 1813, Appendix I"
.Re
It uses remote procedure calls to remove mount entries from
.Pa /var/db/mountdtab
on the remote NFS server.
It is called automatically
without any parameters during startup and shutdown of
the system.
This ensures that
.Xr showmount 8
does not display old and expired entries.
The
.Nm
utility
is only needed on client side, where
.Xr mount_nfs 8
adds a mount entry with the current date to
.Pa /var/db/mounttab ,
and
.Xr umount 8
removes the entry again.
The
.Nm
utility
cares about all remaining entries in this table which result from crashes
or unproper shutdowns.
.Pp
The options are as follows:
.Bl -tag -width indentxxx
.It Fl e Ar expire
All entries which are not actually mounted or older than
.Ar expire
(seconds) are removed from
.Pa /var/db/mounttab .
This may be the case
for DNS changes or long out of service periods.
Default expire time
is 86400 seconds (one day).
.It Fl h Ar host
Only remove the specific hostname.
Send a UMNTALL RPC to the NFS server.
.It Fl k
Keep entries for existing NFS filesystems.
Compare the NFS filesystems from
the mounttab against the kernel mountlist and do not send the RPC to
existing mount entries.
Useful during startup of the system.
It may be
possible that there are already mounted NFS filesystems, so calling
RPC UMOUNT isn't a good idea.
This is the case if the user has rebooted
to 'single user mode' and starts up the system again.
.It Fl p Ar path
Only remove the specific mount-path.
Send a UMOUNT RPC to the NFS server.
This option implies the
.Fl host
option.
.It Fl v
Verbose, additional information is printed for each processed mounttab
entry.
.El
.Sh FILES
.Bl -tag -width /var/db/mounttab -compact
.It Pa /var/db/mounttab
mounted nfs-filesystems
.El
.Sh HISTORY
The
.Nm
utility first appeared in
.Fx 4.0 .
.Sh SEE ALSO
.Xr mountd 8 ,
.Xr mount_nfs 8 ,
.Xr umount 8
.Sh AUTHORS
.An Martin Blapp Aq mb@imp.ch