tar 1.11.1 enhancement idea

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1 total messages Started by Randy Wright Mon, 12 Oct 1992 15:15

#897

Author: Randy Wright
Date: Mon, 12 Oct 1992 15:15

22 lines
1557 bytes

Hello again!

It seems to me that when extracting files from an archive with the
-S/--sparse flag,  it would be a nice feature to be able to create the
files sparsely where appropriate, regardless of whether the archive was
created with the -S/--sparse flag.  I have in fact made such an
enhancement here that I'd be happy to submit if there's interest at
your end.  All that's necessary is to be willing to trade a bit of
processor time for potential disk space savings - we see if each
block of extracted data is composed entirely of zero's and lseek
the output file as appropriate if so.   Blocks are defined,
for BSD-derived systems, by the blocksize of the target file system.
(I guess the V7/old USG blocksize should be a fixed 512, right?)

Let me know if you're interested in this enhancement - I can send
it along if so.

-- 
Randy Wright			Usmail:	Convex Computers
Phone: (214) 497-4868			3000 Waterview Pky. M/S DV4
Email:	rwright@convex.com		P.O. Box 833851
					Richardson, TX  75083-3851

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