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- Date: Mon, 6 Oct 86 09:56:50 edt
- From: philabs!nyit!rick@seismo.CSS.GOV (Rick Ace)
-
- Regarding comments by Mark Crispin <MRC%PANDA@SUMEX-AIM.Stanford.EDU>:
-
- > I would like to add a loud "Bravo!" to Mark Horton's message! The present
- > case sensitivity of the Unix filesystem is a real drag, and something that
- > has regularly and reliably caused me problems when working in a heterogenous
- > environment.
-
- What specifically is wrong with case-sensitivity? I work on both
- case-sensitive (UNIX) and other (TOPS-20) systems regularly, and
- have no problems in switching between them.
-
- > As far as I can tell, the only individuals who actually *like*
- > case sensitivity in Unix are the high-schoolish hackers who think it's really
- > cute to write programs with separate -1, -l, -I, and -L switches.
-
- And many software professionals.
-
- > I think that the most reasonable proposal is to do a free case match on input,
- > so that "more foobar" is the same as "More FooBar", etc. On output, you first
- > do a free case match to see if there is an extant file and if so preserve the
- > case of that file. In other words, if I overwrite FooBar but specify foobar
- > or FOOBAR, the file is still called FooBar. Otherwise, use whatever case the
- > user specifies. Renaming would always use the case the user specifies, so the
- > user can rename foobar to FooBar, etc.
-
- Changing the UNIX kernel to behave like this is, of course, within the
- capabilities of a single programmer. However, not all filename recognition
- under UNIX occurs in the kernel, and you're going to have an
- awesome task finding and rewriting all those user-mode programs that
- know implicitly that filenames are case-sensitive. The problem is
- exacerbated by the fact that you're going to a more complex scheme
- than what was there in the first place.
-
- > ... a FooBar.Txt file is possible on TOPS-20, but only by
- > F<^V>o<^V>oB<^V>a<^V>r.T<^V>x<^V>t.
- > For once, I don't favor the TOPS-20 way of doing things. TOPS-20's scheme is
- > alright if you started with case independence to begin with, but I don't think
- > it would fit in well into Unix, and certainly not without a major flag day. I
- > hope that my suggestion above could fit in with only minimal inconvenience.
-
- It could fit in *part of the way* with minimal inconvenience.
-
- > I found on TOPS-20 that no serious user used case-sensitive filenames.
-
- You've got the cart before the horse. No serious TOPS-20 users used
- case-sensitive filenames because of the inconvenience in entering
- filenames with embedded lowercase characters. On output, filenames
- with embedded ^V characters are aesthetically unpleasant as well.
-
- > Everybody
- > appreciated the case-insensitivity of the interface, even though it took the form
- > of coercing to upper case.
-
- You can replace the word "appreciated" with the words "became accustomed to".
- Also, this argument fails on the grounds that it's hard to get people
- to vote rationally on a subject that involves a decision to change
- from something they're comfortable with.
-
- > My experience also suggests that case sensitivity is
- > a pain in the a**; I tried writing a major utility in Interlisp using mixed case
- > function and variable names and eventually gave up when most of my errors turned
- > out to be case errors.
-
- How about keeping all variable names in one case?
-
- > It's *so* much easier to keep the shift lock key down...
- >
- > -- Mark --
-
- It's just as easy to leave the shift lock key up. Many typists do.
-
-
- The issue of case-sensitivity is a subjective one, thus you'll always
- find many vehement proponents on both sides of the fence. At this
- point in the development of UNIX, such a fundamental change in the
- behavior of the OS would receive at best only partial acceptance among
- the myriad UNIX implementations, leading to even more divergence.
- This effect diametrically opposes the purpose of a standard.
-
- -----
- Rick Ace
- Computer Graphics Laboratory
- New York Institute of Technology
- Old Westbury, NY 11568
- (516) 686-7644
-
- {decvax,seismo}!philabs!nyit!rick
-
-
- Volume-Number: Volume 7, Number 25
-
-