NAME

cdc − change the delta commentary of an SCCS delta

SYNTAX

cdc −rSID [-m [mrlist] ] [-y [comment] ] files... 

DESCRIPTION

The cdc command changes the delta commentary, for the SID specified by the −r option, of each named SCCS file. 

The delta commentary is defined to be the Modification Request (MR) and comment information normally specified via the delta(1) command (−m and −y keyletters). 

If a directory is named, cdc behaves as though each file in the directory were specified as a named file.  Non-SCCS files, last component of the path name does not begin with s., and unreadable files are silently ignored.  If a name of − is given, the standard input is read.  For further information see WARNINGS.  Each line of the standard input is the name of an SCCS file to be processed. 

Arguments to cdc, which may appear in any order, consist of keyletter arguments, and file names. 

All the described keyletter arguments apply independently to each named file:

−rSID Used to specify the SCCS IDentification (SID) string of a delta for which the delta commentary is to be changed. 
 .    RE

−m[mrlist] If the SCCS file has the v flag set, a list of MR numbers to be added and/or deleted in the delta commentary of the SID specified by the −r keyletter may be supplied.  A null MR list has no effect.  For further information see admin(1). 
 .    RE

MR entries are added to the list of MRs in the same manner as that of delta(1).  In order to delete an MR, precede the MR number with the character !.  If the MR to be deleted is currently in the list of MRs, it is removed and changed into a “comment” line.  A list of all deleted MRs is placed in the comment section of the delta commentary and preceded by a comment line stating that they were deleted. 
 .    RE

If −m is not used and the standard input is a terminal, the prompt MRs?  is issued on the standard output before the standard input is read.  If the standard input is not a terminal, no prompt is issued.  The MRs? prompt always precedes the comments? prompt (see −y keyletter). 
 .    RE

MRs in a list are separated by blanks and/or tab characters.  An unescaped new-line character terminates the MR list. 
 .    RE

Note that if the v flag has a value, it is taken to be the name of a program (or shell procedure) which validates the correctness of the MR numbers.  For further information see admin(1).  If a non-zero exit status is returned from the MR number validation program, cdc terminates and the delta commentary remains unchanged. 
 .    RE

−y[comment] Arbitrary text used to replace the comment(s) already existing for the delta specified by the −r keyletter.  The previous comments are kept and preceded by a comment line stating that they were changed.  A null comment has no effect.
 .    RE

If −y is not specified and the standard input is a terminal, the prompt comments? is issued on the standard output before the standard input is read.  If the standard input is not a terminal, no prompt is issued.  An unescaped new-line character terminates the comment text.

The exact permissions necessary to modify the SCCS file are documented in the Source Code Control System User’s Guide. Simply stated, they are either (1) if you made the delta, you can change its delta commentary or (2) if you own the file and directory, you can modify the delta commentary.

EXAMPLES

The first example adds bl78-12345 and bl79-00001 to the MR list, removes bl77-54321 from the MR list, and adds the comment trouble to delta 1.6 of s.file. 

cdc −r1.6 −m"bl78-12345 !bl77-54321 bl79-00001" −ytrouble s.file

The next example does the same thing:

cdc −r1.6 s.file
MRs? !bl77-54321 bl78-12345 bl79-00001
comments? trouble

WARNINGS

If SCCS file names are supplied to the cdc command via the standard input (− on the command line), then the −m and −y keyletters must also be used. 

FILES

x-file (see delta(1))

z-file (see delta(1))

SEE ALSO

admin(1), delta(1), get(1), prs(1), sccshelp(1), sccsfile(5). 

DIAGNOSTICS

Use sccshelp(1) for explanations.