Type III C lass A Program

link exists. and a write request is issued, the link is made
in read-only mode.
Note:
If a user links to another disk as ccu and he already has a
disk ccu, he must either reIPL CMS to read in the new file
directory. or issue LOGIN ccu. Otherwise. the old file
directory exists in core and the new disk is clobbered.
Responses:
ENTER PASSWORD:
Type the required password. By convention. devices specified
as public have the password ALL. A null line defaults to
ALL.
BAD ARGUMENT
Missing or invalid arguments. Error code is 08.
SET TO READ ONLY
The user has requested and been granted read-only access.
Error code is 00.
SET TO WRITE
The user has requested and been granted read-write access.
Error code is OQ,.
FORCED READ ONLY
The user has requested write access but because read-only
links exist, read-only access is forced. Error code is 36.
NONEXISTENT UNIT
Device xxx not found in the specified directory. Error code
is 12.
ALREADY ATTACHED
Requestor already has a device yyy. Error code is 16.
BAD PASSWORD
The supplied password is not valid. or the device is not
sharable. Error code is 20.
USER LOGGING IN
userid is in process of logging in. Try again later,. Error
code is 24.
DEVICE IN USE
A write link exists. LINK denied. Error code is 28.
UNIT NOT READY
The required physical volume is not mounted. Notify system
operator. Error code is 32.
UNIT NOT DASDI
Device xxx must be a DASDI device for LINK. Error code is
LINK 485