Case-insensitive -- what's a scriptor to do?

Question

Here's my delima: (from a tcsh)
% ls
file1.txt file2.TXT file3.txt
% ls file{1,2,3}.TXT
file1.TXT file2.TXT file3.TXT
% ls *.TXT
file2.TXT
% rm *.txt
I've written hundreds of unix (csh,tcsh, perl) scripts since around 1988. I never considered that some day UNIX would ignore case in filenames.
As you can imagine, I'm going to have to re-write dozens of scripts, now that I have this case-insensitive "feature".
QUESTION 1: Is there some way to turn off the ignore-case in Apple unix? What are the consequences of such a bold act?
QUESTION 2: Is there a simple variable, switch, or something, that tells the shell (tcsh) that files are case-sensitive (e.g. *.TXT would match *.txt)? Same request goes for telling filec that is should ignore case.
PowerBook G4   Mac OS X (10.3.9)  

Answer 1

Hi Bill,
   I see what you're saying. When the shell passes information to the filesystem, case ceases to matter. However, C Webber is talking about the reverse situation. HFS+ is case-insensitive but it is case-preserving. Whatever case is used in the naming of a file is reproduced faithfully in read operations and shells are by default case-sensitive. C Webber's example was filename globbing. The shell reads the names of the files and looks for matches in a case-sensitive fashion. In that case, case will matter.
   I can see where this would cause problems. You might test for the existence of a file in a case-sensitive fashion, find out that it doesn't, write to the filesystem and blow away a file even though you were careful. You know that something like that happened with the Perl install script, causing it to blow away dozens of its own man pages.
C. Webber,
   I did a search of the tcsh man page and found nothing suggesting that you can turn off case-sensitivity in globbing. You can do so in completion but it appears that rewrites will be necessary. I encourage you to view this as an opportunity and switch to a more powerful shell. I agree with you that this issue is unique to Mac OS X but every flavor of UNIX has its own issues. We've all had to make changes to migrate scripts. I've certainly had to do that to migrate some of my scripts to Linux and some won't migrate at all. (I use AppleScript in many of my scripts)
Gary
~~~~
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