Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!ut-sally!std-unix
From: rbj@icst-cmr.arpa (Jim Cottrell)
Newsgroups: comp.std.unix
Subject: Re: tar or cpio?  Tar, of course!
Message-ID: <8031@ut-sally.UUCP>
Date: Tue, 12-May-87 19:17:16 EDT
Article-I.D.: ut-sally.8031
Posted: Tue May 12 19:17:16 1987
Date-Received: Sat, 16-May-87 04:07:32 EDT
Sender: std-unix@ut-sally.UUCP
Reply-To: rbj@icst-cmr.arpa
Lines: 53
Approved: jsq@sally.utexas.edu (Moderator, John Quarterman)

In article <8018@ut-sally.UUCP> rbj@icst-cmr.arpa writes:
>Depends on what you mean. I have had troubles reading the original
>TPC V6 & V7 distribution tapes under 4.2 BSD. Perhaps the format has
>changed since then. Anyone have a tar that will read these tapes?

Ok, the joke's on me. I'll try dump. Now on to Joe Yao's articles.
 
? >I would also like to see an option not to cross mount points, that is
? >stay on the same partition. This should be added to several major utilities.
? 
? Easy enough:
? 	[%$] su
? 	Password:
? 	# mount
? 	/ on /dev/disk-0
? 	/prime on /dev/disk-1
? 	/prime/secundus on /dev/disk-2
? 	# unmount /dev/disk-2
? 	# cd /prime
? 	# tar xv
? 
? Other than that, this is awfully hard to do unless you are willing
? to break modularity by sticking info about the FS into programs
? which have no need to know about it whatsoever.

Find on BSD4.3 has -xdev, and others have -prune. It is often desirable
to restrict searches to a single file system. Besides, to unmount /usr,
you have to kill all the daemons, and then the only editor you  have is ed.

? In article <8006@ut-sally.UUCP> guy@sun.com (Guy Harris) writes:
? >	3) It is less common.  Almost all UNIX systems that support
? >	   "cpio" also support "tar"; many UNIX systems that support
? >	   "tar" do not support "cpio".
? 
? Guy's arguments are mostly good, especially when reasoning about
? the byte-order problem.  It should perhaps be noted, though, that
? cpio pre-dates tar, and that there are probably numerous systems
? "out there" that have cpio but not tar.  This, at least, seems to
? be one of the arguments used by X/OPEN.

Saying cpio predates tar might be strictly true, but tar hit the streets 
first. Do you know of any UNII that have cpio but not tar?

? 	Joe Yao		jsdy@hadron.COM (not yet domainised)
? 	hadron!jsdy@{seismo.CSS.GOV,dtix.ARPA,decuac.DEC.COM}
? {arinc,att,avatar,cos,decuac,dtix,ecogong,kcwc}!hadron!jsdy
?      {netex,netxcom,rlgvax,seismo,smsdpg,sundc}!hadron!jsdy
 
	(Root Boy) Jim "Just Say Yes" Cottrell	<rbj@icst-cmr.arpa>
	I just had my entire INTESTINAL TRACT coated with TEFLON!


Volume-Number: Volume 11, Number 24