Appropriate Privilege [ User's Guide to MPE/iX Security ] MPE/iX 5.0 Documentation
User's Guide to MPE/iX Security
Appropriate Privilege
Appropriate privilege means that the user has sufficient capabilities to
perform an operation even if the user is not explicitly granted the
necessary access. The user's capabilities grant the correct access to
the directory or file.
Appropriate privilege does not override file lockwords, privileged files,
privileged file codes, or write-protected files.
System manager capability
Having SM capability provides appropriate privilege and allows the system
manager (or those having SM) to override the file access matrix or ACD on
any file or directory.
Users with SM capability can create files and directories anywhere on the
system. Users with SM capability can also rename files anywhere on the
system. To rename a file from an MPE group in one account to an MPE
group in another account, you must have SM capability.
Account manager capability
If all objects in an account have the same GID, the traditional MPE model
remains in effect. A user having AM capability for the account can
access all of the files and directories within the account.
It is possible for objects within an account to have different GIDs if,
for example, files are renamed or if the GID is changed programmatically.
In this case, having AM capability will not be sufficient privilege to
gain access to those files. The GID of the user with AM has to match the
GID of the file or directory to allow access to it.
MPE/iX 5.0 Documentation