Access protection for container files

POSIX file systems are stored in container files. Container files are BS2000 PAM files in non-key format. They are protected against unauthorized access via standard access control of BS2000 (ACCESS/USER-ACCESS attribute).

The POSIX installation program specifies container files as non-sharable, and with ACCESS=*WRITE. These protection attributes must not be modified. Nor is it permissible to assign a file password.

The user of a POSIX file does not require an access right for the container file.