SIC LOCK
Keywords: sic

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SIC LOCK

            [SIC\]SIC LOCK [LockFile]

        With no argument, display the list of lock files owned  by  the  current
        program  session.  With  a  file name as argument, create this file as a
        lock file. Attempting to create a lock file which already  exists  is  a
        fatal  error.  Lock  files  owned by the current program session are im-
        plicitely deleted when exiting.

        This command is intended to protect some user's resources, e.g. invoking
        it  in  a  procedure ensures that this procedure can not be run twice in
        the same or in another session.