The security administrator defines a user by creating a RACF® user profile with an ADDUSER command or alters the user profile with an ALTUSER command. The RACF user profile contains values that are used to set the following environment variables:

LOGNAME

The TSO/E user ID.

HOME

The path name of the user's home directory as specified in the HOME parameter of the RACF command. If the HOME parameter was not specified, HOME is the root directory. Unpredictable results might occur if an invalid or nonexistent directory is specified for the HOME parameter. For more information about setting up home directories for users, see Defining z/OS UNIX users to RACF.

SHELL

The path name of the file containing the shell program as specified in the PROGRAM parameter on the RACF command. If PROGRAM was not specified, SHELL is /bin/sh.