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- Date: Mon, 29 Sep 86 12:33:36 edt
- From: mark@cbosgd.att.com (Mark Horton)
-
- OK, here's a new topic. File names.
-
- I note that the committee recently decided that all file names
- in conforming systems must be case sensitive, for example,
- makefile and Makefile must be different files. (I've forgotten
- where I read this, it was probably Communixations.)
-
- I think this is a mistake. UNIX is the only major operating system
- that treats things like file names, logins, host names, and commands
- as case sensitive. The net effect of this is that users get
- confused, since they have to get the capitalization right every time.
- To avoid confusion, everybody always just uses lower case. So
- there are few, if any, benefits from a two-case system, and any time
- anyone tries to do something that isn't pure lower case, it causes
- confusion for somebody and often breaks some program.
-
- Another problem is that emulations on other operating systems,
- such as VMS or MS DOS, will become impossible without drastic
- changes to their file systems. Given the problems in the above
- paragraph, plus politics as usual, I think it is unlikely that
- other systems will be changed to have case sensitive file systems.
- After all, it's not like it was easiest to make the VMS filesystem
- case insensitive - that took extra effort on their part.
-
- I think it's a mistake to move in the direction of requiring other
- operating systems to become case sensitive. If anything, motion in
- the other direction might be of more benefit.
-
- Note: I am NOT suggesting that UNIX should have a case insensitive
- filesystem that maps everything to UPPER CASE like MS DOS. There is
- nothing wrong with mapping everything to lower case, for example.
- It's also reasonable to leave the case alone, but ignore case in
- comparisons. There is also probably a good argument for keeping
- it case sensitive (after all, there are probably 5 or 6 people out
- there who really need both makefile and Makefile, or both mail and
- Mail, for some reason that escapes me at the moment.) But I think
- it would be a mistake to require other systems to change if they
- are to support a POSIX emulation on top of them. (On the other hand,
- it may be reasonable to expect other operating systems to support
- more general file name lengths and character sets, rather than things
- like the MS DOS 8+3 convention. But in practice, this may be too
- painful to fix.)
-
- Mark Horton
-
- Volume-Number: Volume 7, Number 11
-
-