evmd — Event Manager daemon
The Event Manager (EVM) daemon,
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
The daemon in turn starts the event logger,
and the channel manager,
On startup, the daemon reads its configuration file,
the authorization file,
and the event template files stored under the
If these files are modified while the daemon is running, the
command must be used or a
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,
As a daemon,
does not have a standard output.
Any error messages are written to the file
The EVM daemon is monitored by the Essential Services Monitor daemon,
which automatically restarts
if it terminates unexpectedly.
for more information.
The following exit values are returned:
- not 0
An error occurred.
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.
Default directory for event template files
Default location for event filter files.
Filter files must have the suffix
Error log file for
UNIX domain socket established for connection between the EVM daemon and
the local clients
Daemon process id saved by
Lock file established to prevent multiple invocations of the daemon
Default location of the EVM daemon configuration file
Default location of the EVM daemon authorization file