Users on MPE/iX are now identified by a user ID (UID). The UID is a string (in the form user.account) with a corresponding integer value. Each MPE account has a group ID (GID) associated with it. The GID is a string (in the form account) and also has a numerical value assigned to it. UIDs and GIDs were added to file and process structures to more easily identify object owners and file sharing groups, respectively. (Refer to Chapter 5 for more information about UIDs and GIDs.)
In addition to the UIDs and GIDs, users are identified as follows:
Table 9-1 User Categories
| Category | Conditions |
|---|
| File Owner | The user whose UID matches the object's UID (matched by user.account or $OWNER in ACDs). |
| File Group Member | Any user whose GID matches the GID of the object (also called @.account or $GROUP in ACDs). This group is a new file sharing concept that should be distinguished from MPE groups (that is, group directories). By default, when a user creates a file or directory, it is assigned the parent directory's GID. |
| File Group Class Member | Any ACD entry except $OWNER and @.@.
|
