AMQ(8)
NAME
amq - automounter query tool
SYNOPSIS
amq [ -fmpsvwHTU ] [ -h hostname ] [ -l log_file ] [ -x log_options ] [ -D debug_options ] [ -P program_number ] [[ -u ] directory ... ]
DESCRIPTION
Amq provides a simple way of determining the current state of amd program. Communication is by RPC. Three modes of operation are supported
by the current protocol. By default a list of mount points and automounted filesystems is output. An alternative host can be specified
using the -h option.
If directory names are given, as output by default, then per-filesystem
information is displayed.
OPTIONS
- -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.
- -l log_file
- Tell amd to use log_file as the log file name. For security reasons, this must be the same log file which amd 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 filesystems,
- including the number of references to each filesystem and any error which occurred while mounting.
- -p Return the process ID of the remote or locally running amd.
- Useful when you need to send a signal to the local amd process, and would rather not have to search through the process table. This option is used in the ctl-amd script.
- -s Ask the automounter to provide system-wide mount statistics.
- -u Ask the automounter to unmount the filesystems named in direc
- tory instead of providing information about them. Unmounts are requested, not forced. They merely cause the mounted filesystem to timeout, which will be picked up by amd's main scheduler thus causing the normal timeout action to be taken.
- -v Ask the automounter for its version information. This is a sub
- set of the information output by amd's -v option.
- -w Translate a full pathname as returned by getpwd(3) into a short
- Amd pathname that goes through its mount points. This option requires that Amd is running.
- -x log_options
- Ask the automounter to use the logging options specified in log_options from now on.
- -D log_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 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, and need to manage each one separately. If not specified, amq will use the default program number for amd, 300019. For security reasons, the only alternate program numbers amd can use range from 300019 to 300029, inclusive.
- -T Contact amd using the TCP transport only. Normally amq will try
- TCP, and if that failed, will try UDP.
- -U Contact amd using UDP (connectionless) transport only. Normally
- amq will try TCP, and if that failed, will try UDP.
FILES
amq.x RPC protocol description.
CAVEATS
Amq uses a Sun registered RPC program number (300019 decimal) which may
not be in the /etc/rpc database.
- If the TCP wrappers library is available, and the use_tcpwrappers
global amd.conf option is set to ``yes'', then amd will verify that the
host running amq is authorized to connect. The amd service name must
used in the /etc/hosts.allow and /etc/hosts.deny files. For example,
to allow only localhost to connect to amd, add this line to
/etc/hosts.allow:
- amd: localhost
- and this line to /etc/hosts.deny:
amd: ALL
SEE ALSO
amd(8), ctl-amd(8), amd.conf(5), hosts_access(5).
``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
AUTHORS
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.