System Startup, Configuration, and Shutdown Reference Manual (32650-90907)

Chapter 4
Using the System Generator (SYSGEN)
Redirecting SYSGEN Input and Output
105
Redirecting SYSGEN Input and Output
By using SYSGEN’s file designators, you can redirect SYSGEN’s input and output. Redirecting SYSGEN’s
input and output enables you, for example, to issue commands to SYSGEN using command files that can
operate without user intervention or interactive keyboard input.
SYSGEN uses three formal file designators for input, output, and listing:
• SYSGIN. The formal file designator for the standard SYSGEN input file. By default, this file is set to
$STDINX.
• SYSGOUT. The formal file designator for the standard SYSGEN output file. By default, this file is set to
$STDLIST.
• SYSGLIST. The formal file designator for the standard SYSGEN listing file. By default, this file is set to
any device in the class LP.
$STDINX and $STDLIST are the file names for the terminal from which SYSGEN is run. The device in class LP
is your system printer.
Redirect SYSGEN input and output by using the FILE command and equating some other files to SYSGIN,
SYSGOUT, and SYSGLIST, or by using the INFO parameter and options in the SYSGEN command line.
For example, the commands FILE SYSGIN=NEWIN and SYSGEN,,NEWIN accomplish the same task. When
SYSGEN is activated, they utilize NEWIN as the input file. Likewise, the commands FILE SYSGOUT=NEWOUT
and SYSGEN,,,NEWOUT equate NEWOUT to the formal file designator, SYSGOUT, so SYSGEN utilizes NEWOUT as
the output file.
With redirection you can use a command input file to complete common routines that you perform frequently.
Example 4-9 lists a three-line job stream (named SYSGENON) which, when run using the STREAM command,
logs on to the system, enters SYSGEN, and executes the SYSGEN command file (LISTIT) in Example 4-10.
Refer to MPE/iX Commands Reference Manual for information on the STREAM command.
Example 4-9 Command File (SYSGENON) Created With EDITOR
1 !JOB SYSGENON,MANAGER/userpass.SYS/acctpass,groupname
2 !SYSGEN,,LISTIT
3 !EOJ
Table 4-2 explains the actions performed by each line of the preceding command file.
Table 4-2 Actions Performed by Command File Example
Line Action
1 Log on to the file SYSGENON as MANAGER.SYS with all accompanying
system manager capabilities.
2 Activate SYSGEN and redirect input so that SYSGEN uses the file
named LISTIT as the input file.
3 End the job file after SYSGEN has completed the tasks outlined by
the SYSGEN command file LISTIT.