MPE/iX Shell and Utilities Reference Manual, Vol 2

other hierarchical directory. You can use file information routines to return information about
these directories.
• You cannot modify the user ID (UID) and group ID (GID) associated through MPE/iX Shell and Utili-
ties.
Account Directory Features
• You cannot rename, copy, or remove account directories through
MPE/iX Shell and Utilities. You
can only create account account directories directly under the root directory if you are a user SM
capability using the MPE/iX CI command NEWACCT.
• Access permissions for an account directory are read and execute access for all users and
write access for none. Attempts to use chmod to remove or change access permissions of an
account directory result in a system error (see syserror(3)).
• When an account directory name is a component in a path name, you must specify it in uppercase.
• MPE/iX account directories are restricted to the MPE/iX
system volume set.
• An account directory does not contain explicit dot (.) and dot-dot (..) directories; however, dot
and dot-dot directory behavior is supported. You can open the dot and dot-dot directories just like
any other hierarchical directory. You can use file information routines to return information about
these directories.
• You cannot modify the user ID (UID) and group ID (GID) associated with an account directory
through MPE/iX
Shell and Utilities.
Group Directory Features
• You cannot rename, copy, or remove group directories through MPE/iX Shell and Utilities. You can
only use the
MPE/iX CI command NEWACCT to create group directories directly under account
directories or to modify them if you are a user with system manager (
SM) or account manager (AM)
capability who is a member of that account (your
GID matches the GID of the account).
• Default access permissions for group directories are read and execute access for all users and
write access for none. You can only modify access permissions for a group directory with the
MPE/iX CI command ALTGROUP. Attempts to use chmod to remove or change access permissions
of a group directory result in a system error (see syserror(3)).
• When a group directory name is a component in a path name, you must specify it in uppercase.
• You can create files and hierarchical directories at any level beneath group directories.
• Names of files and hierarchical directories created directly under groups and accounts cannot
exceed 16 characters in length.
• You can optionally assign MPE/iX group directories (and all files and hierarchical directories at all
levels under them) to a user volume set when created.
MPE/iX Implementation Considerations A-11