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User Identification
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
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| | |
| Category | Conditions |
| | |
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| | |
| File Owner | The user whose UID matches the object's UID (matched by user.account |
| | or $OWNER in ACDs). |
| | |
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| | |
| 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. |
| | |
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| | |
| File Group Class | Any ACD entry except $OWNER and @.@. |
| Member | |
| | |
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