COBOL Manual for TNS and TNS/R Programs

Contents

HP COBOL Manual for TNS and TNS/R Programs—522555-006

xxi

26. Input and Output Concepts

Files 26-1

System File Names 26-2

COBOL File Names 26-4

Associating COBOL File Names With System File Names 26-5

Prereading File Records 26-10

Processes Handled as Files 26-10

Intercepting Operating System Messages 26-10

27. Tape Input and Output

Reading and Writing Tape Files 27-1

Preventing Prereading 27-1

Saving Tape and Time 27-2

Unlabeled Tape Files 27-3

Labeled Tape Files 27-8

Tape Files of Types Other Than HP 27-12

Adding DEFINEs for Tape Files 27-15

Unlabeled Tape Files 27-16

Labeled Tape Files 27-18

Executing HP COBOL Programs That Use Tape Files 27-24

Mount Messages 27-24

Run-Time Errors 27-26

28. Disk Input and Output

Common Disk File Topics 28-1

Allocation 28-2

Partitioned Files

28-2

Purging Files or Their Data

28-2

Locking 28-3

Ownership and Security 28-3

Fixed-Length and Variable-Length Records 28-6

Exclusion Modes 28-6

Time Limits 28-7

Reading Files From Called Programs 28-7

Sharing Files Among HP COBOL Programs 28-8

Sharing Files Among Different-Language Modules 28-8

Modification 28-9

Maximum Number of Files 28-9