Tracking versions with SCCS

cdc

The cdc command is used to change the commentary made when the delta was created. It is similar to the rmdel command (for example, -r and full SID are necessary), although the delta need not be a leaf delta. For example,

   $ cdc -r3.4 s.abc

specifies that the commentary of delta 3.4 is to be changed. New commentary is then prompted for as with delta.

The old commentary is kept, but it is preceded by a comment line indicating that it has been superseded, and the new commentary is entered ahead of the comment line. The inserted comment line records the login name of the user executing cdc and the time of its execution.

The cdc command also allows for the insertion of new and deletion of old MR numbers with the ! symbol. Thus

cdc -r1.4 s.abc
MRs? mrnum3 !mrnum1 (The MRs? prompt appears only
if the v flag has been set.)
comments? deleted wrong MR no. and inserted correct MR no.

inserts mrnum3 and deletes mrnum1 for delta 1.4.