SYNOPSIS
amq [ -fmpqsvwHTU ] [ -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 auto-mounted 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.
- -q
-
Suppress error messages produced when attempting synchronous unmounts
with the
-u
option.
- -s
-
Ask the automounter to provide system-wide mount statistics.
- -u
-
Ask the automounter to unmount the filesystems named in
directory
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.
If the
-u
option is repeated,
amq
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
-q
option.
- -v
-
Ask the automounter for its version information. This is a subset of the
information output by
amd's
-v
option.
- -w
-
Translate a full pathname as returned by
getcwd(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. 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 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
AUTHORS
Jan-Simon Pendry <[email protected]>, Department of Computing, Imperial College, London, UK.Erez Zadok <[email protected]>, 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.