Technical data
Using OpenVMS System Management Utilities and Tools
2.4 Using OPCOM to Communicate with System Users
OPCOM Components
OPCOM uses the following components:
Component Description
For More
Information
OPCOM process The system process that manages OPCOM operations.
Unless you disable it, the OPCOM process starts
automatically at system startup time.
Section 2.4.2
Operator terminals Terminals designated to display messages broadcast
by OPCOM. Usually, the console terminal (with the
device name OPA0:) is the operator terminal. However,
you can designate any user terminal as an operator
terminal.
Section 2.4.5
Operator log file A file that records messages broadcast by OPCOM. The
file is named SYS$MANAGER:OPERATOR.LOG.
Section 20.6.1
OPCOM messages Messages broadcast by OPCOM. These messages are
displayed on operator terminals and written to the
operator log file. The messages might be general
messages sent by you, user requests, operator replies, or
system events.
Section 20.6.2
REPLY and REQUEST
commands
DCL commands that allow you to use and control
OPCOM.
Section 2.4.3,
Section 2.4.6, and
Section 2.4.7
OPCOM Defaults
OPCOM uses the following defaults:
• OPCOM is started by default on all systems.
• Except for workstations in an OpenVMS Cluster environment, OPCOM logs
messages to OPA0:, which is enabled by default as an operator terminal. The
log file SYS$MANAGER:OPERATOR.LOG is opened, and all OPCOM classes
are enabled on both the operator terminal and the log file.
Section 2.4.4 explains how to control the use of OPA0: as an operator
terminal. Section 20.6.3.2 explains how to specify the default state of operator
log files.
OPCOM Requirements
OPCOM has the following requirements:
• To execute a REPLY command, OPCOM must be running, and you must enter
REPLY from a terminal device designated as an operator terminal.
• The REPLY command requires at least OPER privilege. You must have
SHARE privilege if another process is logged in to the designated operator
terminal. To enable or disable the security class, you must have SECURITY
privilege.
• To designate an operator terminal in batch or SYSTARTUP, you must assign
SYS$COMMAND to a valid terminal device.
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