SEWALL@UCONNVM.BITNET (Murph Sewall) (06/26/89)
> In reading your articles on the net I have come to the conclusion that >you are will informed about the workings of UNIX and Apples. So I will but >this question to you. What I know about UNIX, I've 'picked up' reading net mail. I haven't access to a UNIX system here, and I've never used UNIX myself. > About a month ago I received a file from a UNIX system with the suffix >of" .tar.Z ". Now I know what it stands for, but I have no access to a real >UNIX's system. Is there away to undo the tar and compress of these file on >a Apple computer? Any help would be appreciated. > >Rick Bradley >[ARPA] crash!pnet01!pro-nsfmat!pro-europa!rickb@nosc.mil Perhaps someone reading comp.sys.apple (aka info-apple) has a program that'll do it (I've copied my reply to the list in the hope that something might turn up; I am also sending a copy to Larry Virden who I KNOW is using a UNIX system <lwv27@CAS.BITNET>). Murph Sewall Vaporware? ---> [Gary Larson returns 1/1/90] Prof. of Marketing Sewall@UConnVM.BITNET Business School sewall%uconnvm.bitnet@mitvma.mit.edu [INTERNET] U of Connecticut {psuvax1 or mcvax }!UCONNVM.BITNET!SEWALL [UUCP] (203) 486-5246 [FAX] (203) 486-2489 [PHONE] 41 49N 72 15W [ICBM] -+- I don't speak for my employer, though I frequently wish that I could (subject to change without notice; void where prohibited)
nazgul@obsolete.UUCP (Kee Hinckley) (06/26/89)
> > About a month ago I received a file from a UNIX system with the suffix > >of" .tar.Z ". Now I know what it stands for, but I have no access to a real > >UNIX's system. Is there away to undo the tar and compress of these file on > >a Apple computer? Any help would be appreciated. I think there was a recent posting of the 'compress' utility to apple-l, although only for the GS. I didn't look at it closely to see if it was actually the same algorithm as the Unix version (which the .Z represents). Support for that would be a nice addition to ShrinkIt, the algorithm is the modified lempel-ziv also used by Stuffit on the Mac (although Stuffit adds an archive structure around it). Tar is a BSD utility (Tape ARchive). There is a compatible version on the Mac (made by the GNU Project). There is also a PD program on Unix that supports Tar and CPIO (the System V version) called Pax (Portable Archive eXchange?, also an indicator of the fight in Unix over which is the preferable format). This program could probably be ported to the Apple if someone wished to. So. Now you have all this information and still no help (unless you count the Mac in your "Apple"). Your best bet is to find someone on a Unix system near you and ask them to do it for you. Given that you're on pro-europa, why don't you rcp it to pro-angmar!nazgul and I'll unpack it for you and send back the pieces. Home: obsolete!nazgul@bloom-beacon.mit.edu Work: nazgul@apollo.com BBS: obsolete!pro-angmar!nazgul@bloom-beacon.mit.edu or nazgul@pro-angmar.cts.com (somewhat slower though) 617/641-3722 (300/1200/2400) -------
aash@ms.uky.edu (aash) (06/27/89)
In article <8906260924.aa01054@SMOKE.BRL.MIL> SEWALL@UCONNVM.BITNET (Murph Sewall) writes: >> About a month ago I received a file from a UNIX system with the suffix >>of" .tar.Z ". Now I know what it stands for, but I have no access to a real >>UNIX's system. Is there away to undo the tar and compress of these file on >>a Apple computer? Any help would be appreciated. In my archive here, I keep stuff tarred (.tar) and compressed (.Z). tar is short for 'tape archive' but is also handy for keeping a multitude of related files all in one file. Along with compress, this is a very nice way to store things, as it is space efficient and easy to upload, download, and maintain. Unfortunately, not everyone has a Unix machine (yet), or has the tar and compress programs. If anyone has anything they would like to get, but doesn't because of the file media format, please let me know and i'll store it in ascii or some other format and put it into a temporary directory. aash -- aash@ms.uky.edu, aash@ukma.bitnet |"It's important to me that you know you | (FTP archive at 128.163.128.6) | are free, 'cause I never want to make | {backbone|rutgers|uunet}!ukma!aash | you change for me." -Todd |
friedman@porthos.rutgers.edu (Gadi ) (06/27/89)
In article <8906260924.aa01054@SMOKE.BRL.MIL> SEWALL@UCONNVM.BITNET (Murph Sewall) writes: > > About a month ago I received a file from a UNIX system with the suffix > >of" .tar.Z ". Now I know what it stands for, but I have no access to a real > >UNIX's system. Is there away to undo the tar and compress of these file on > >a Apple computer? Any help would be appreciated. > > > >Rick Bradley > >[ARPA] crash!pnet01!pro-nsfmat!pro-europa!rickb@nosc.mil As far as I know, there is no way to uncompress and untar these files on an Apple II. The unix compress program uses a huge hash table that would be very difficult to implement on an apple. I also don't know if anyone ported tar to the apple, though PD versions do exist. Gadi -- uucp: {ames,att,harvard,ucbvax,iuvax}!rutgers!aramis.rutgers.edu!friedman arpa: FRIEDMAN@ARAMIS.RUTGERS.EDU
gwyn@smoke.BRL.MIL (Doug Gwyn) (06/27/89)
In article <Jun.26.16.29.34.1989.5185@porthos.rutgers.edu> friedman@porthos.rutgers.edu (Gadi ) writes: >The unix compress program uses a huge hash table >that would be very difficult to implement on an apple. The hash table is used only for compression, not decompression. It's a standard LZW scheme, most likely using 16-bit codes. An Apple IIGS should have enough room to uncompress it. However, your best bet is to transfer the file to a real computer and do the work there.
dougm@lakesys.UUCP (Doug McIntyre) (06/27/89)
In article <8906260924.aa01054@SMOKE.BRL.MIL> SEWALL@UCONNVM.BITNET (Murph Sewall) writes: > >> About a month ago I received a file from a UNIX system with the suffix >>of" .tar.Z ". Now I know what it stands for, but I have no access to a real >>UNIX's system. Is there away to undo the tar and compress of these file on >>a Apple computer? Any help would be appreciated. >> >>Rick Bradley >>[ARPA] crash!pnet01!pro-nsfmat!pro-europa!rickb@nosc.mil > >Perhaps someone reading comp.sys.apple (aka info-apple) has a program >that'll do it (I've copied my reply to the list in the hope that >something might turn up; I am also sending a copy to Larry Virden who >I KNOW is using a UNIX system <lwv27@CAS.BITNET>). > A .tar.Z file is a file that has been 'tar'ed and compressed. I released my port of compress for the IIGS a little more than month ago on comp.binaries.apple2, and mailed it to the archive server Apple2-l. I do have a working detar for the IIGS, but I don't want to release it, as it still is a little flakey, and I don't consider it up to par to release to the whole world. I'll send mail to rickb asking him if he wants what I have for detar, and explaing its bugs, and non-features.. Both of these require a shell such as APW or Orca or ECP to run though, since they are Unix type programs, and I use the shell all the time.. Of course Unix has both of these utilities handy. -- UUCP: uunet!marque!lakesys!dougm Compuserve: 70611,2215 INET: dougm@lakesys.lakesys.COM GEnie: D.MCINTYRE1 ALPE: DougMac
friedman@porthos.rutgers.edu (Gadi ) (06/27/89)
In article <10458@smoke.BRL.MIL> gwyn@smoke.BRL.MIL (Doug Gwyn) writes: > The hash table is used only for compression, not decompression. > It's a standard LZW scheme, most likely using 16-bit codes. > An Apple IIGS should have enough room to uncompress it. > However, your best bet is to transfer the file to a real computer > and do the work there. Well, from what I undestand (and I am looking at the source) it is a dynamic LZW scheme. It starts out using 9-bit codes, and can go up to 12-16 depending on compiler flags (with 12 bits used on 16bit machines). It also has provisions for clearing the table, if it gets too full. Your probably right about the hash tables, though, I can't really tell. The code contains too many macros and #ifdefs Gadi -- uucp: {ames,att,harvard,ucbvax,iuvax}!rutgers!aramis.rutgers.edu!friedman arpa: FRIEDMAN@ARAMIS.RUTGERS.EDU