Open System Services Management and Operations Guide (G06.25+, H06.03+)

Managing Security
Open System Services Management and Operations Guide—527191-002
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User and User-Group Attributes
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A file-sharing user group has a group number in the range 0 through 65535.
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A user definition can have a primary user group that is different from its
administrative user group.
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Each user definition has both a user name and a user ID.
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A user name (sometimes called a logon name) has the form
group-name.member-name.
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A user definition has a user ID that is unique within the NonStop node. The
user ID is usually represented:
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In the Guardian environment as the structured value pair group-number,
member-number.
The NonStop operating system predefines the user ID of the super ID as
(255,255).
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In the OSS environment as a unique scalar value in the range 0 through
65535 called the UID.
The UID is equal to member-number + (256 * group-number).
The NonStop operating system predefines the UID of the super ID as
65535.
The UID value 65535 always has appropriate privileges in the OSS
environment.
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A user definition can have aliases up to 32 characters long that can be used for
login to the system. An alias is created using the SAFECOM ADD ALIAS
command and can have different attributes (other than the UID) from those of the
underlying user definition.
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User groups can exist independently of user definitions. Therefore:
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A user group can be created before any users are added to it.
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A user group can continue to exist after its last user has been removed from it.
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There can be up to 65,535 user groups, including 256 administrative groups.
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There is no limit on the number of file-sharing members (users) in a user group. An
administrative group can have up to 256 users for user management and
administration purposes; an administrative group can have additional file-sharing
members administered through a different administrative group.
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User groups with group numbers above 255 are file-sharing user groups rather
than administrative user groups.
In the OSS environment, users can have the following additional attributes (which are
ignored in the Guardian environment):