NAME
evmd — Event Manager daemon
DESCRIPTION
The Event Manager (EVM) daemon,
evmd,
receives events from posting clients and distributes them to
subscribing clients that have indicated that they are interested in
receiving the events.
The daemon is a critical system facility that is started automatically
when the system transitions to run level 2, and which should not be
terminated.
The daemon in turn starts the event logger,
evmlogger,
and the channel manager,
evmchmgr.
On startup, the daemon reads its configuration file,
/etc/evmdaemon.conf,
the authorization file,
/etc/evm.auth,
and the event template files stored under the
/usr/share/evm/templates
directory.
If these files are modified while the daemon is running, the
evmreload -d
command must be used or a
SIGHUP
signal must be sent to instruct the daemon to reconfigure itself.
The system administrator can control access to events by modifying the
EVM authorization file,
/etc/evm.auth.
As a daemon,
evmd
does not have a standard output.
Any error messages are written to the file
/var/evm/adm/logfiles/evmdaemon.log.
The EVM daemon is monitored by the Essential Services Monitor daemon,
esmd,
which automatically restarts
evmd
if it terminates unexpectedly.
See
esmd(1M)
for more information.
RETURN VALUES
The following exit values are returned:
- 0
Successful completion.
- not 0
An error occurred.
WARNINGS
The daemon rejects any attempt by a posting client to post an event that
has one or more of the following problems:
The event is not registered.
The event contains invalid item values.
The posting client is not authorized to post such an event.
FILES
- /usr/share/evm/templates
Default directory for event template files
- /usr/share/evm/filters/*.evf
Default location for event filter files.
Filter files must have the suffix
.evf.
- /var/evm/adm/logfiles/evmdaemon.log
Error log file for
evmd
- /var/evm/sockets/evmd
UNIX domain socket established for connection between the EVM daemon and
the local clients
- /var/run/evmd.pid
Daemon process id saved by
evmd
- /var/evm/sockets/evmd.lck
Lock file established to prevent multiple invocations of the daemon
- /etc/evmdaemon.conf
Default location of the EVM daemon configuration file
- /etc/evm.auth
Default location of the EVM daemon authorization file
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