The pdxtx2afp command uses file descriptors while it processes Xerox jobs:

fd0 (STDIN)

You can pass the Xerox data stream as standard input to file descriptor zero.

fd1 (STDOUT)

You can instruct Infoprint XT to write the AFP data stream that results from conversion to file descriptor one.

fd2 (STDERR)

Infoprint XT writes messages from the conversion process to standard error.

fd3

If you define this file descriptor and Infoprint XT tried to convert the job, Infoprint XT writes one record that contains the total number of pages that the conversion process produced.

fd9

If you specify the -d transform directive, the command writes a file that contains problem determination information to file descriptor nine. It uses the z/OS® pax command to generate a compressed archive of the resource directory. The archive is in USTAR format.

For more information about specifying file descriptors with the pdxtx2afp command, see Examples: pdxtx2afp command.