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- From: dan@wilma.bbn.com (Dan Franklin)
-
- In Vol. 12, No. 13, Doug Gwyn makes several good comments about
- cpio vs. tar, but then goes on to say:
-
- > I never did understand what inter-system archive interchange formats
- > had to do with specification of a portable environment for
- > applications...
-
- The most obvious way they relate is that most applications need to be
- installed somehow. How should the developer of the application
- package it so it can be read by all POSIX systems? If a standard
- format, such as tar, is specified, then the developer can produce the
- software in that format and have it copied onto the appropriate medium
- for distribution to different machines.
-
- Some applications may also want to provide a facility to save their
- file state, carry it onto another machine, and bring it back. A
- standard format would be useful here too.
-
- > You probably couldn't read my 1/4" tape cartridge no
- > matter what archive format I used on it.
-
- Irrelevant, on two counts. First, there are a lot of machines out
- there with half-inch tape drives, and they *could* interchange tapes if
- the issues being discussed now were resolved. Second, there are (as I
- understand it) only two major 1/4" tape formats, and work is underway
- to make one of them standard, so in the future I *will* be able to read
- your 1/4" tape cartridge--if the POSIX format is standardized.
-
- Regarding 1003.1 vs. 1003.2: although an argument could be made for
- pushing this discussion off into that group, I think it would be a bad
- idea. The tape format is not the user interface, as this discussion
- has emphasized. Keeping the tape format in 1003.1 helps everyone to
- remember that fact. Not only may other programs want to use the same
- format, but more importantly, for 1003.1 we can ignore the user
- interface altogether. Since both the user interface and the tape
- format are incendiary subjects, in this way we have some hope of
- actually settling at least part of the issue.
-
- Also, if we postpone this discussion to 1003.2 the whole context of our
- current discussions will be lost. We will go through the same cycle
- all over again. (Does anyone really want to have to keep repeating, when
- the 1003.2 discussions begin, "that point was raised in our 1003.1
- discussion and we decided that..."?) The only difference will be that
- the discussion will get even more muddled than it is now, because
- people will jump back and forth between format issues, which are
- fundamental and hard to change, and user interface issues, which are
- surface issues that are much easier to change over time.
-
- Please, let's try to decide the issue now. We seem to be getting
- closer to a resolution; let's not lose our momentum.
-
- Dan Franklin
-
- Volume-Number: Volume 12, Number 16
-
-