Directives
DEF GID/UID Define Group/User ID
   
Formats
1. Define Group ID: DEF GID= groupID | groupname$ [,ERR=stmtref]
2. Define User ID: DEF UID= userID | username$ [ LOCAL ] [,ERR=stmtref]

Where:

groupID Numeric UNIX/Linux group ID number
groupname$ UNIX/Linux group name.
userID Numeric UNIX/Linux user ID number
username$ UNIX/Linux user name or username to use when running in Windows.
stmtref Program line number or statement label to which to transfer control.
   
Description These directives allow you to override the effective UNIX/Linux user or group ID of a session, if OS security allows it. If the value is *, the system reverts to original effective user or group ID.

For Windows, this directive merely changes the internal value returned in WHO or UID and the value stored in program headers when issuing a SAVE command. It is not validated by the operating system in any way.

The LOCAL option can be specified if the change of the Userid is only an internal change to the value returned in UID/WHO and is not to passed to or vaidated by the operating system.

The LOCAL option is a +PxPlus Exclusive (build 9201)
*Note* Whether or not you can become a different user is governed by the operating system. If the OS does not allow the change, an error will be returned.