guy@sun.uucp (Guy Harris) (09/30/85)
> Is the Ultrix tar format identical with the BSD tar format?
One should hope so; if it weren't, Ultrix "tar" would be useless. Since
Ultrix is a 4.2BSD derivative, the "tar"s are probably the same program
modulo some bug fixes. However, most UNIXes out there are more-or-less V7
derivatives so *all* their "tar" programs are related and have the same
"tar" format. (Were that not the case, "tar" would be a lousy way of
exchanging data between machines.)
Guy Harrisgwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>) (10/02/85)
Note that IEEE P1003 is defining "tar" as a portable data exchange format for UNIX-like systems. (Includes extensions to accommodate 4.2BSD etc.)
mikel@codas.UUCP (Mikel Manitius) (10/06/85)
> > Is the Ultrix tar format identical with the BSD tar format? > > One should hope so; if it weren't, Ultrix "tar" would be useless. Since > Ultrix is a 4.2BSD derivative, the "tar"s are probably the same program > modulo some bug fixes. However, most UNIXes out there are more-or-less V7 > derivatives so *all* their "tar" programs are related and have the same > "tar" format. (Were that not the case, "tar" would be a lousy way of > exchanging data between machines.) > > Guy Harris I have found that BSD tar is *not* identical to System V tar format, this gives me a great problem, since I have many source tapes of BSD that I would like to read on a System V! -- ======= Mikel Manitius ==----===== AT&T (305) 869-2462 RNX: 755 ==------===== Information Systems ...{akguc|ihnp4}!codas!mikel ===----====== SDSS Regional Support ...attmail!mmanitius =========== Altamonte Springs, FL My opinions are my own. =======
guy@sun.uucp (Guy Harris) (10/08/85)
> I have found that BSD tar is *not* identical to System V tar format, > this gives me a great problem, since I have many source tapes of BSD > that I would like to read on a System V! The BSD "tar" format is a superset of the V7/S3/S5 "tar" format. It puts out "funny" entries for directories; other "tar"s don't put out any information about directories. Reading a BSD "tar" tape on a non-BSD system causes some warning messages about the directory entries, but all the files and containing directories are created as before. (Of course, if it's a 4.2BSD "tar" tape with symbolic links, it won't work if your system doesn't support symbolic links.) If the "tar" tape was written with the default block size on a BSD system (20*512 bytes), you may have trouble reading it on 3B20s with the loser tape controller or other such machines which can't support large block sizes on tape. Otherwise, just mount up the tar tape and start reading. Guy Harris
steiny@scc.UUCP (Don Steiny) (06/17/86)
** Not only did DEC change a fundemental data structure of UNIX in ULTRIX (while claiming to high-heaven that it is UNIX compatible), they did not bother to document it. The manual "man 5 acct" describes the UNIX acct structure, not the one that ULTRIX uses. The fact that the manual does not describe the software leads me to believe that DEC has not even done the most rudimentry QA on ULTRIX. I have found more bugs in 8 hours of using ULTRIX than I could find in a month of QA on HP's new HP-UX. -- scc!steiny Don Steiny @ Don Steiny Software 109 Torrey Pine Terrace Santa Cruz, Calif. 95060 (408) 425-0382