Giving CICS regions access to z/OS UNIX directories and files
CICS® requires access to directories and files in z/OS® UNIX. During installation, each of your CICS regions is assigned a z/OS UNIX user identifier (UID). The regions are connected to an ESM group that is assigned a z/OS UNIX group identifier (GID). Use the UID and GID to grant permission for the CICS region to access the directories and files in z/OS UNIX.
Before you begin
Ensure that you are either a superuser on z/OS UNIX, or the owner of the directories and files. The owner of directories and files is initially set as the UID of the system programmer who installs the product. The owner of the directories and files must be connected to the ESM group that was assigned a GID during installation. The owner can have that ESM group as their default group (DFLTGRP) or can be connected to it as one of their supplementary groups.
About this task
z/OS UNIX System Services treats each CICS region as a UNIX user. You can grant user permissions to access z/OS UNIX directories and files in different ways. For example, you can give the appropriate group permissions for the directory or file to the ESM group to which your CICS regions connect. This option might be best for a production environment and is explained in the following steps.
Procedure
Results
When you change the CICS facility that you are setting up, such as moving files or creating new files, remember to repeat this procedure to ensure that your CICS regions have permission to access the new or moved files.