combine SCCS deltas
comb [-o] [-s] [-pSID] [-clist] file . . .
generates a shell procedure [see
that, when run, reconstructs the given SCCS files.
The reconstructed files are typically smaller than the original files.
The arguments may be specified in any order,
but all keyletter arguments apply to all named SCCS files.
If a directory is named,
behaves as though 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;
each line of the input is taken to be the name of an SCCS file
to be processed;
non-SCCS files and unreadable files are silently ignored.
The generated shell procedure is written on the standard output.
arguments are as follows.
Each argument is explained as if only one named file
is to be processed, but the effects of any keyletter argument
apply independently to each named file.
this argument causes the reconstructed file to be accessed at
the release of the delta to be created,
otherwise the reconstructed file would be accessed at
the most recent ancestor.
Use of the
keyletter may decrease the size of the reconstructed SCCS file.
It may also alter the shape of the delta tree of the original file.
to generate a shell procedure that, when run,
produces a report that gives
for each file:
the file name, size (in blocks) after combining,
original size (also in blocks), and
100 (original - combined) / original
It is recommended that before any SCCS files are actually combined,
one should use this option to determine exactly how much space
is saved by the combining process.
identification string (SID) of the oldest delta to be preserved.
All older deltas are discarded in the reconstructed file.
of deltas to be preserved.
All other deltas are discarded.
for the syntax of a list.
If no keyletter arguments are specified,
preserves only leaf deltas and the minimal number of ancestors
needed to preserve the tree.
the reconstructed SCCS file
language-specific message file (See LANG on
may rearrange the shape of the tree of deltas.
comb may not save any space;
in fact, it is possible for the reconstructed file to
be larger than the original.
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 25 April 2004