Usage notes

This service is intended only for use by a z/OS UNIX file system and by z/OS UNIX servers. The service contains support for z/OS UNIX servers, but cannot be directly invoked by a z/OS UNIX server.
The access checks performed are POSIX file permission checks defined in POSIX 1003.1.
If the audit function code in the CRED is access or eaccess, no audit record is written. Access checking only tests whether a process would have access if it were running with its real UID. Eaccess checking only tests whether a process would have access with its effective UID. Neither gives access to the file.
If the calling syscall is not access (for real or effective UID), an audit record is optionally written, depending on the audit options in effect for the system.
The caller must pass in the address of the object's access ACL in the CredAclPtr field.