Source code control system (SCCS)

rmdel command

The rmdel(CP) command allows removal of a delta from an SCCS file. Its use should be reserved for deltas in which incorrect global changes were made. The delta to be removed must be a leaf delta. That is, it must be the most recently created delta on its branch or on the trunk of the SCCS file tree. In ``Extended branching concept'', only deltas,, and 2.2 can be removed. Only after they are removed can deltas and 2.1 be removed.

To remove a delta, the effective user must have write permission in the directory containing the SCCS file. In addition, the real user must be either the one who created the delta being removed or the owner of the SCCS file and its directory.

The -r key letter is mandatory with rmdel. It specifies the complete SID of the delta to be removed. For example, to specify the removal of trunk delta 2.3, use the command:

rmdel -r2.3

Before removing the delta, rmdel checks that the release number (%R%) of the given SID satisfies the relation:

   floor lessthan or equalto R lessthan or equalto ceiling
The rmdel command also checks the SID to make sure it is not for a version on which a get for editing has been executed and whose associated delta has not yet been made. In addition, the login name or group ID of the user must appear in the file's user list (or the user list must be empty). Also, the release specified cannot be locked against editing. That is, if the SCCS file l flag is set, the release must not be contained in the list. (See admin(CP).) If these conditions are not satisfied, processing is terminated, and the delta is not removed.

Once a specified delta has been removed, its type indicator in the delta table of the SCCS file is changed from D (delta) to R (removed).

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