SIC LOCK

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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.