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4-1-documentation/sysjob.doc
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SYSJOB.DOC -- Changes from V4(10) to V5(10)
October 1981
COPYRIGHT (C) 1976,1979,1982 BY
DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.
THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND COPIED
ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE AND WITH THE
INCLUSION OF THE ABOVE COPYRIGHT NOTICE. THIS SOFTWARE OR ANY OTHER
COPIES THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY
OTHER PERSON. NO TITLE TO AND OWNERSHIP OF THE SOFTWARE IS HEREBY
TRANSFERRED.
THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT NOTICE
AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL EQUIPMENT
CORPORATION.
DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY OF ITS
SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DIGITAL.
SYJ5.DOC Page 2
SYSJOB.DOC -- Changes from V4(10) to V5(10)
October 1981
1.0 SUMMARY
SYSJOB is a program for controlling system background programs. It is
normally started only by job 0, and it creates additional processes
and jobs as necessary. An operator or other privileged job may pass
commands to SYSJOB via an EXEC command (Ctrl-E) SPEAK to affect the
status of the background programs.
SYSJOB Version 5(10) runs on TOPS20 Release 5.
SYSJOB does not require any other software modules for normal
execution.
SYSJOB is documented in the TOPS-20 Operator's Guide under the
(Ctrl-E)SPEAK command.
2.0 EXTERNAL CHANGES
A new command, "DUMP" has been added to dump a fork's contents.
3.0 KNOWN BUGS AND DEFICIENCIES
None.
4.0 INSTALLATION INSTRUCTIONS
Mount the tape labeled Installation Tape on MTA0: and type the
following commands:
SKIP MTA0:5 FILES
R DUMPER
TAPE MTA0:
REWIND
DENSITY 1600-BPI
RESTORE <*>SYSJOB.EXE TO: <SYSTEM>*.*.-1
REWIND
SYJ5.DOC Page 3
4.1 Files Needed to Run SYSJOB
The monitor expects to find SYSJOB.EXE in SYSTEM: at startup. SYSJOB
in turn expects to find the file SYSJOB.RUN in SYSTEM:. This file
contains the initial set of commands to start the usual background
programs and the operator job. If the monitor is started in debug
mode, (DBUGSW=2), SYSJOB will look for the file SYSJOB.DEBUG in
SYSTEM: instead of SYSJOB.RUN. This allows a different (possibly
null) set of background programs to be started when debugging. While
SYSJOB is running it periodically looks for a file in SYSTEM: called
SYSJOB.COMMANDS. If such a file exists, SYSJOB executes the commands
in the file and deletes the file.
4.2 Instructions for Loading and Installing SYSJOB
SYSJOB.EXE and SYSJOB.RUN are loaded into SYSTEM: as part of the
normal installation and disk refresh procedure. New versions may be
installed by copying the .EXE file to SYSTEM:. The new version will
be used the next time the monitor is started, or a command may be
given to SYSJOB to cause an immediate reload.
4.3 Files Needed to Build SYSJOB
SYSJOB is built from the following file:
SYSJOB.MAC
In addition, the following files must be on SYS:
MACSYM.UNV
MONSYM.UNV
4.4 Instructions for Building SYSJOB
Mount the tape labeled Distribution Tape on MTA0: and type the
following commands:
R DUMPER
TAPE MTA0:
REWIND
DENSITY 1600-BPI
SKIP 1
RESTORE <*>*.*.* (TO) <self>*.*.*
REWIND
^C
SUBMIT SYSJOB.CTL/TIME/UNIQ:0/REST
SYJ5.DOC Page 4
4.5 Special Considerations
SYSJOB must be available in SYSTEM:. Copies in other directories are
not required. SYSJOB should not be started manually if the job 0 copy
is running normally, since this would automatically start redundant
copies of the background programs and conflicts would occur. For
debugging purposes, an internal flag may be set which causes SYSJOB to
use an initial command file other than SYSJOB.RUN. Consult a source
listing for details.
Commands may be given to SYSJOB during normal system operation by use
of the (Ctrl-E)SPEAK command. See the Operator's Guide for details.
5.0 INTERNAL CHANGES
Refer to SYSJOB.TCO for detailed information about changes.
6.0 SUGGESTIONS
None.
[End of SYJ5.DOC]