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- Date: Thu 2 Oct 86 01:59:26-PDT
- From: Mark Crispin <MRC%PANDA@SUMEX-AIM.Stanford.EDU>
- Postal-Address: 1802 Hackett Ave.; Mountain View, CA 94043-4431
- Phone: +1 (415) 968-1052
-
- 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. 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.
-
- 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.
-
- Now, if I can convince you guys to do this for usernames, I will take back at
- least 50% of the nasty things I've ever said about Unix. Golly gee, it would
- be nice to be MRC or Crispin, not "mrc" or "crispin"...
-
- Another way of doing it is how TOPS-20 does it. TOPS-20's filesystem isn't
- *really* case independent. All lowercase characters are coerced into upper
- case, so if I say foobar.txt it becomes FOOBAR.TXT in the actual filename.
- This is both from the user interface and from the filename lookup system call.
- It is, however, possible for any of the 128 ASCII characters to be in a filename,
- provided that the "oddball" characters are quoted using CTRL/V. In other words,
- 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.
-
- I found on TOPS-20 that no serious user used case-sensitive filenames. Everybody
- appreciated the case-insensitivity of the interface, even though it took the form
- of coercing to upper case. 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. It's *so* much easier to keep the shift lock key down...
-
- -- Mark --
- -------
-
- Volume-Number: Volume 7, Number 12
-
-