amq
—
automounter query tool
amq |
[ -fimpqsvwHTU ]
[-h
hostname ]
[-l
log_file ]
[-x
log_options ]
[-D
debug_options ]
[-P
program_number ]
[] |
This command is obsolete. Users are advised to use
autofs(5)
instead.
The
amq
utility provides a simple way of
determining the current state of the
amd(8)
program. Communication is by RPC. Three modes of operation are supported by
the current protocol. By default a list of mount points and auto-mounted file
systems is output. An alternative host can be specified using the
-h
option.
If
directory names are given, as output by
default, then per file system information is displayed.
-f
- Ask the automounter to flush the internal caches and reload all the
maps.
-h
hostname
- Specify an alternate host to query. By default the local host is used. In
an HP-UX cluster, the root server is queried by default, since that is the
system on which the automounter is normally run.
-i
- Print information about the mount maps.
-l
log_file
- Tell
amd(8)
to use log_file as the log file name. For
security reasons, this must be the same log file which
amd(8)
used when started. This option is therefore only useful to refresh
amd
's open file handle on the log file,
so that it can be rotated and compressed via daily cron jobs.
-m
- Ask the automounter to provide a list of mounted file systems, including
the number of references to each file system and any error which occurred
while mounting.
-p
- Return the process ID of the remote or locally running
amd(8).
Useful when you need to send a signal to the local
amd(8)
process, and would rather not have to search through the process table.
This option is used in the ctl-amd
script.
-q
- Suppress error messages produced when attempting synchronous unmounts with
the option.
-s
- Ask the automounter to provide system-wide mount statistics.
-u
- Ask the automounter to unmount the file systems named in
directory instead of providing
information about them. Unmounts are requested, not forced. They merely
cause the mounted file system to timeout, which will be picked up by
amd
's main scheduler thus causing the
normal timeout action to be taken. If the option is repeated, will attempt
to unmount the file system synchronously by waiting until the timeout
action is taken and returning an error if the unmount fails. Any error
messages produced may be suppressed with the option.
-v
- Ask the automounter for its version information. This is a subset of the
information output by
amd(8)'s
-v
option.
-w
- Translate a full pathname as returned by
getcwd(3)
into a short
amd(8)
pathname that goes through its mount points. This option requires that
amd(8)
is running.
-x
log_options
- Ask the automounter to use the logging options specified in
log_options from now on. Note that the
"fatal" and "error" options cannot be turned off.
-D
debug_options
- Ask the automounter to use the debugging options specified in
debug_options from now on.
-H
- Display short usage message.
-P
program_number
- Contact an alternate running
amd(8)
that had registered itself on a different RPC
program_number and apply all other
operations to that instance of the automounter. This is useful when you
run multiple copies of
amd(8),
and need to manage each one separately. If not specified,
amq
will use the default program number
for
amd(8),
300019. For security reasons, the only alternate program numbers
amd(8)
can use range from 300019 to 300029, inclusive.
-T
- Contact
amd(8)
using the TCP transport only. Normally
amq
will try TCP, and if that failed,
will try UDP.
-U
- Contact
amd(8)
using UDP (connectionless) transport only. Normally
amq
will try TCP, and if that failed,
will try UDP.
- amq.x
- RPC protocol description.
The
amq
utility uses a Sun registered RPC
program number (300019 decimal) which may not be in the
rpc(5)
database.
If the TCP wrappers library is available, and the
use_tcpwrappers global
amd.conf(5)
option is set to “
yes
”, then
amd(8)
will verify that the host running
amq
is
authorized to connect. The “
amd
” service
name must be used in the
/etc/hosts.allow
and
/etc/hosts.deny files. For example, to
allow only localhost to connect to
amd(8),
add this line to
/etc/hosts.allow:
amd: localhost
and this line to
/etc/hosts.deny:
amd: ALL
amd.conf(5),
hosts_access(5).
amd(8),
“am-utils”
info(1)
entry.
Erez Zadok,
Linux NFS and Automounter Administration,
Sybex, 2001,
ISBN 0-7821-2739-8.
http://www.am-utils.org/
Amd - The 4.4 BSD
Automounter.
The
amq
utility first appeared in
4.4BSD.
Jan-Simon Pendry
⟨jsp@doc.ic.ac.uk⟩, Department of Computing, Imperial College,
London, UK.
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
.