msglock
msglock ?-nodestroy? ?-nowrite? msgId
This command modifies and queries a message object’s locks. Each flag specifies a lock to set on the message in the interpreter. After set, a lock cannot be removed.
msglock returns a list describing the message’s lock-state after the new locks, if any, are applied.
The list contains zero or more of these elements:
-
nodestroy
Message cannot be destroyed
-
nowrite
Message cannot be modified