Chapter 8 Writing to a File

Table of Contents

Sequential Access and Random Access

Writing to a disk file using sequential access

Writing to a disk file using random access

Writing to $STDLIST

Writing Messages to the System Console

Writing a message to the system console

Writing a message to the system console and requesting a reply

Writing to a Magnetic Tape File

Writing to an unlabeled magnetic tape file

Writing to a labeled magnetic tape file

Writing a File Label to a Labeled Tape File

Writing User Data in ANSI Labels

• "Sequential Access and Random Access" discusses two common methods of record selection and data transfer, and uses examples to illustrate the use of the FWRITE and FWRITEDIR intrinsics.

• "Writing to $STDLIST" discusses how your program can use the PRINT and FWRITE intrinsics to write data from your program to the job/session standard list device, $STDLIST. An example illustrates the use of the PRINT intrinsic to write a character string to $STDLIST.

• "Writing Messages to the system console" discusses how your program can send messages from your program to the system console, and request a reply from the operator. Examples illustrate the use of the PRINTOP and PRINTOPREPLY intrinsics.

• "Writing to a Magnetic Tape File" discusses how you can write data to two kinds of magnetic tape files: unlabeled tape files and labeled tape files. Examples illustrate the use of the FWRITE intrinsic to write data to both types of tape files.

• "Writing a File Label to a Labeled Tape File" provides an example of using the FWRITELABEL intrinsic to write a user-defined file label to a labeled magnetic tape file.