Combining lists Post: 303043045

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comb

comb(1) 						      General Commands Manual							   comb(1)

NAME

       comb - Combines Source Code Control System (SCCS) deltas

SYNOPSIS

       comb [-clist] [-os] [-pSID] file...

       The  comb  command writes to standard output a shell procedure for combining the specified deltas (SIDs) of an SCCS file and creating a new
       version of the file with fewer deltas.

OPTIONS

       Each option or group of options applies independently to each named file.  Specifies a list of deltas (SIDs) that the shell procedure  will
       preserve  (see get -ilist). The procedure will combine all other deltas.  Accesses the reconstructed file at the release of the delta to be
       created for each get -e generated; otherwise, accesses the reconstructed file at the  most  recent  ancestor.   Using  the  -o  option  may
       decrease  the  size of the reconstructed SCCS file.  It may also alter the shape of the delta tree of the original file.  Specifies the SID
       of the oldest delta for the resulting procedure to preserve.  All older deltas are combined in the reconstructed file.  Causes comb to gen-
       erate a shell procedure that, instead of combining the deltas, produces a report for each file, which lists the file name, size (in blocks)
       after combining, original size (also in blocks), and percentage change computed by the following formula: 100 *	(original  -  combined)  /
       original

	      Run comb using this option before actually combining SCCS deltas in order to judge how much space will actually be saved by the com-
	      bining process.

DESCRIPTION

       By piping the output of the comb command to a shell, or redirecting the output to a file and running that file as a  shell  procedure,  you
       can reduce the size of your SCCS file. You can first see how much the file will be reduced by running the comb command with the -s option.

       If  you	specify  a directory in place of file, the comb command performs the requested actions on all SCCS files (that is, those with file
       names with the s.  prefix).  If you specify a - (dash) in place of file, the comb command reads standard input and interprets each line	as
       the name of an SCCS file. The comb command continues to take input until it reads End-of-File.

       If  you	do not specify any options, the comb command preserves only leaf deltas and the minimal number of ancestors needed to preserve the
       tree (see the delta command).

       The comb command may rearrange the shape of the tree deltas.

       The comb command may not save any space; in fact, it is possible for the reconstructed file to actually be larger than the original.

EXAMPLES

       To  generate a report on how much space will be saved by combing all deltas older than SID 1.4 for SCCS file s.test.c, enter: comb -p1.4 -s
       s.test.c | sh To actually combine the deltas, enter: comb -p1.4 s.test.c | sh

FILES

       Temporary files.

SEE ALSO

       Commands:  admin(1), cdc(1), delta(1), get(1), prs(1), rmdel(1), sact(1), sccs(1), sccsdiff(1), sccshelp(1), unget(1), val(1), what(1)

       Files:  sccsfile(4)

       Programming Support Tools

																	   comb(1)