COMB(1s,C) AIX Commands Reference COMB(1s,C) ------------------------------------------------------------------------------- comb PURPOSE Combines Source Code Control System (SCCS) deltas. SYNTAX +-------------+ comb ---| +---------+ |--- file ---| +-| -o |-+ ^| -s || || -p SID || || -c list || |+---------+| +-----------+ Note: This command does not have MBCS support. DESCRIPTION The comb command writes to standard output a shell procedure that can combine the specified deltas (SIDs) or all deltas into one delta. You may reduce the size of your SCCS file by running the resulting procedure on the file. You can see how much the file will actually be reduced by running the command with the -s flag. 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 - (minus) 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 (Ctrl-D). If you do not specify any flags, the comb command preserves only leaf deltas and the minimal number of ancestors needed to preserve the tree (see "delta"). Note: The comb command may rearrange the shape of the tree deltas. It may not save any space; in fact, it is possible for the reconstructed file to actually be larger than the original. FLAGS Each flag or group of flags applies independently to each named file. -c list Specifies a list of deltas (SIDs) that the shell procedure preserves (see the -ilist flag the SID list format on page get-6). The procedure combines all other deltas. Processed November 8, 1990 COMB(1s,C) 1 COMB(1s,C) AIX Commands Reference COMB(1s,C) -o Accesses the reconstructed file at the release of the delta to be created for each get -e command generated; otherwise, accesses the reconstructed file at the most recent ancestor. Using the -o flag may decrease the size of the reconstructed SCCS file. It may also alter the shape of the delta tree of the original file. -p SID Specifies the SID of the oldest delta for the resulting procedure to preserve. All older deltas are combined in the reconstructed file. -s Causes the comb command to generate a shell procedure that produces a report that for each file gives the file name, size (in blocks) after combining, original size (in blocks), and percentage of change computed by the formula: 100 * (original - combined) / original You should run the comb command using this flag and run its procedure before combining SCCS files in order to judge how much space will actually be saved by the combining process. FILES s.COMB The name of the reconstructed SCCS file. comb* Temporary files. RELATED INFORMATION See the following commands: "admin," "delta," "get," "sccshelp," and "prs." See the sccsfile file in AIX Operating System Technical Reference. See the discussion of SCCS in AIX Operating System Programming Tools and Interfaces. Processed November 8, 1990 COMB(1s,C) 2