Solutions to Module 5: User Commands

Check Your Answers

	Is Your Answer ... ?	If Not, Start With
1.	TRUE	Lesson 1
2.	FALSE	Lesson 1
3.	An abbreviation for User-defined command.	Lesson 1
4.	UDC executes. The system command executes.	Lesson 2
5.	`HELP UDCname`	Lesson 3
6.	`SETCATALOG`	Lesson 3
7.	`SETCATALOG UDCfile;APPEND`	Lesson 3
8.	`OPTION NOPROGRAM`	Lesson 4
9.	`OPTION RECURSION`	Lesson 4
10.	The file `MONEY` prints out. The files `DOLLARS` and `CENTS` print out.	Lesson 5
11.	It executes a `LISTFILE` of the specified file using the specified option (-1,0,1,2,3,4,6).	Lesson 5
12.	The command interpreter lets you toggle between EDIT/3000 and the operating system so that you can edit and test programs or command files.	Lesson 6

Lesson 1 UDCs and Command Files

Exercise 5-1: Lesson 1 Review

1.

	Characteristics	Command Files	UDC Files
a.	Must be cataloged.		`X`
b.	Uses commands and parameters	`X`	`X`
c.	Command definitions must be separated by asterisks.		`X`
d.	Can easily be converted to the other.	`X`	`X`
e.	Executes the `OPTION LOGON`.		`X`
f.	Can be created with a text processor.	`X`	`X`
g.	Invoked by a command header.		`X`
h.	Invoked by a file name.	`X`

2.

MYCOMM1
MYCOMM2
SHOWJOB
SM, BEGIN

3.

	Function	HELP UDC name	SHOW CATALOG	PRINT UDC file name
a.	List all UDC files currently cataloged for an account.		`X`
b.	List the contents of a specified UDC.	`X`
c.	List the contents of a specified UDC file.			`X`

************** End of Exercise 5-1 ************

Lesson 2 Understanding Search Priority and Search Path

Q 5-1

user UDC SM
account UDC LF
user UDC TRYIT

Q 5-2

The UDC file executes.

Q 5-3

The UDC MYFILEX executes.

Exercise 5-2: Lesson 2 Review

Search path and execution priority problems include:

system command LISTFILE
program file DELFILE in your current group
MPE/iX command PRINT
command file MYLIST

************** End of Exercise 5-2 *************

Lesson 3 Cataloging UDCs

Q 5-4

To delete all the UDC files from the UDC directory, you would enter the following command:
SETCATALOG
To add the UDC files MOSCOW, NAIROBI, and BRASILIA to the UDC directory without affecting other cataloged files, you would enter the following command:
SETCATALOG MOSCOW,NAIROBI, BRASILIA;APPEND
To replace existing UDC files in your UDC directory with the following files: NEWYORK, BOSTON, BOMBAY, and ZURICH, you would enter this command:
SETCATALOG NEWYORK,BOSTON, BOMBAY,ZURICH
To remove BOSTON and BOMBAY from the directory without affecting other UDC files, enter this command:
SETCATALOG BOSTON,BOMBAY;DELETE

Lesson 4 Using UDC Options

Exercise 5-3: RECURSION Option

In order to allow UDC SO to call upon and execute UDC ST (without changing the order of the UDCs in the file), you would have to use OPTION RECURSION as follows:

   ST

   SHOWTIME

   ***

   SM

   SHOWME

   ***

   SO

   OPTION RECURSION

   SHOWOUT

   ST

   ***

********** End of Exercise 5-3 **********

Q 5-5

To make the UDC not executable from within a program, you need to add the NOPROGRAM option:

   LF

   OPTION NOPROGRAM

   LISTFILE

   ***

Q 5-6

SHOWTIME is displayed. The LISTFILE command is not displayed because it is preceded by OPTION NOLIST.
No MPE/iX commands are displayed because the OPTION NOLIST is still in effect.
No MPE/iX commands are displayed because the OPTION NOLIST is still in effect.

Exercise 5-4: UDC Options

The SLS UDC should look like this:

   SLS

   SHOWTIME

   LISTFILE

   OPTION LIST

   SHOWME

   ***

The problem with the following UDC is that OPTION NOHELP can only appear directly after the header.

   LISTER

   OPTION NOLIST

   FILE OUT;DEV=LP

   PRINT MYFILE, OUT=*OUT

   OPTION LIST

   *OPTION NOHELP

   LISTFILE MYFILE,2

Default values for the options are marked with an asterisk (*):

   LIST             NOLIST*

   HELP*            NOHELP

   RECURSION        NORECURSION*

   PROGRAM*         NOPROGRAM

************ End of Exercise 5-4 *****************

Lesson 5 Using Parameters

Exercise 5-5: Using Parameters

1.

The LS command file should look like this:

    

   PARM FILE NAME,OPTION="1"

   LISTFILE !FILE NAME,!OPTION

2a.

When you enter LS without any options, the following happens:

LISTFILE,1 executes by default.

2b.

When you enter LS with option 1, the following happens:

LISTFILE,1 executes.

When you enter LS with option 2, the following happens:

LISTFILE,2 executes.

When you enter LS with option 3, the following happens:

LISTFILE,3 executes.

3.

The LS UDC should look like this:

    

   LS FILE NAME,OPTION="1"

   LISTFILE !FILE NAME,!OPTION

   ***

4.

To uncatalog MYUDC3 and edit it, do the following:

Uncatalog MYUDC3:

SETCATALOG

Edit MYUDC3:

   LS FILE NAME,OPTION="1"

   LISTFILE !FILE NAME,!OPTION

   ***

Recatalog MYUDC3:

SETCATALOG MYUDC3

To execute LS, do the following:

   LS JOB1

   LS JOB1,2

   LS JOB1,3

************ End of Exercise 5-5 ****************