cdc - change the delta commentary of an SCCS delta
cdc -r SID [-m[mrlist]] [-y[comment]] files
The cdc command changes the delta commentary, for the SID specified by
the -r option, of each named SCCS file.
Delta commentary is defined to be the Modification Request (MR) and
comment information normally specified via the delta(1) command (-m
and -y options).
If a directory is named, cdc behaves as if each file in the directory
were specified as a named file, except that 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 (see WARNINGS); each line of the standard input is taken
to be the name of an SCCS file to be processed.
Arguments to cdc, which can appear in any order, consist of option
arguments and file names.
All of the described option arguments apply independently to each
-rSID Used to specify the SCCS IDentification (SID)
string of a delta for which the delta commentary
is to be changed.
-m[mrlist] If the SCCS file has the v option set (see
admin(1)), a list of MR numbers to be added and/or
deleted in the delta commentary of the SID
specified by the -r option may be supplied. A
null MR list has no effect.
MR entries are added to the list of MRs in the
same manner as that of delta(1). To delete an MR,
precede the MR number with the character ! (see
EXAMPLES). 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.
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;
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if the standard input is not a terminal, no prompt
is issued. The MRs? prompt always precedes the
comments? prompt (see -y option).
MRs in a list are separated by blanks and/or tab
characters. An unescaped new-line character
terminates the MRs list.
Note that if the v option has a value (see
admin(1)), it is treated as the name of a program
(or shell procedure) that validates the
correctness of the MR numbers. If a non-zero exit
status is returned from the MR number validation
program, cdc terminates and the delta commentary
-y[comment] Arbitrary text used to replace the comment or
comments already existing for the delta specified
by the -r option. Previous comments are kept and
preceded by a comment line stating that they were
changed. A null comment has no effect.
If -y is not specified and the standard input is a
terminal, the prompt comments? is issued on the
standard output before standard input is read; if
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 get(1). Simply stated, they are either:
+ If you made the delta, you can change its delta commentary, or
+ If you own the file and directory, you can modify the delta
LANG determines the language in which messages are displayed.
International Code Set Support
Single- and multi-byte character code sets are supported.
Use sccshelp(1) for explanations.
Add bl78-12345 and bl79-00001 to the MR list, remove bl77-54321 from
the MR list, and add the comment trouble to delta 1.6 of s.file:
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cdc -r1.6 -m"bl78-12345 !bl77-54321 bl79-00001" -ytrouble s.file
The following does the same thing:
cdc -r1.6 s.file
MRs? !bl77-54321 bl78-12345 bl79-00001
If SCCS file names are supplied to the cdc command via the standard
input (- on the command line), the -m and -y options must also be
x-file See delta(1).
z-file See delta(1).
admin(1), delta(1), get(1), sccshelp(1), prs(1), sccsfile(4),
rcsfile(4), acl(5), rcsintro(5).
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