cdc(1)cdc(1)Namecdc - change delta commentary of an SCCS file
Syntaxcdc-rSID [-m[mrlist]] [-y[comment]] files
The command changes the delta commentary of each named SCCS file, for
the SID specified by the -r option.
The delta commentary is defined to be the Modification Request (MR) and
comment information usually specified by the command (-m and -y
The commentary may consist of one or more lines, terminated by a dot in
column one of a new line.
If a directory is named, behaves as though each file in the directory
were specified as a named file, except non-SCCS files (last component
of the path name does not begin with s.) and unreadable files, which
are silently ignored. If a name of - is given, the standard input is
read (see RESTRICTIONS). Each line of the standard input is taken to
be the name of an SCCS file to be processed.
Arguments to which may appear in any order, consist of option argu‐
ments, and file names.
All the described option arguments apply independently to each named
-m[mrlist] Adds or deletes modification numbers. If the SCCS file
has the v flag set then a list of MR numbers to be added
and/or deleted in the delta commentary of the SID speci‐
fied by the -r option may be supplied. For further
information, see A null MR list has no effect.
MR entries are added to the list of MRs in the same man‐
ner as that of In order 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 is preceded by a comment line stat‐
ing 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. 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 charac‐
ters. An unescaped new-line character terminates the MR
Note that if the v flag has a value it is taken to be
the name of a program (or shell procedure) which vali‐
dates the correctness of the MR numbers. For further
information, see If a nonzero exit status is returned
from the MR number validation program, terminates and
the delta commentary remains unchanged.
-rSID Specifies the SCCS Identification string of a delta for
which the delta commentary is to be changed.
-y[comment] Replaces existing commentary for the delta specified by
the -r option. The previous comments are kept and pre‐
ceded 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 ter‐
minal, the prompt comments? is issued on the standard
output before the standard input is read; if the stan‐
dard input is not a terminal, no prompt is issued. A
dot in column one of a new line terminates the comment
Certain permissions are necessary to modify the SCCS file; generally,
however, if you made the delta, you can change its delta commentary,
and if you own the file and directory you can modify the delta commen‐
This example shows how to 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.
sccscdc -r1.6 -m"bl78-12345 !bl77-54321 bl79-00001" -ytrouble .file
This example does the same thing.
sccscdc -r1.6 .file
-MRs? !bl77-54321 bl78-12345 bl79-00001
If SCCS file names are supplied to the command via the standard input
(- on the command line), then the -m and -y options must also be used.
See for explanations.
For more information, see
For more information, see
See Alsoadmin(1), delta(1), get(1), help(1), prs(1), sccs(1), sccsfile(5)
Guide to the Source Code Control System