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- From: bzs@bu-cs.bu.edu (Barry Shein)
- Date: Sun, 12 Oct 86 14:02:11 EDT
-
- Other operating systems use case insensitivity in their file names, why?
-
- As I remember it is a holdover of older encoding conventions
- intended to save disk space. PDP-10s used SIXBIT, RT11 and
- others used RAD50, in the real old days people used 026's and
- ttys, all of these had only one case for A..Z. I don't think
- it was a human factor, it was an economy of a different age.
- Systems like VMS and CMS continue this due to their heritage.
-
- At least make user names monocase.
-
- Is the convention that upper-case user names imply an
- upper-case only terminal being discarded? If not, what
- is the new convention? What else should we redesign?
-
- At least make file names monocase (a)
-
- Please list all software this would affect, besides Make.
- How many mktemp() calls make use of case? Lock files?
- Are you *sure* none of these would be affected adversely?
-
- ...it would make emulators easier (b)
-
- As has been noted EUNICE doesn't seem to have too much
- trouble with exactly this. Any comments/requests from
- EUNICE developers? HCR? Why are we protecting them if they
- don't ask for this? My guess is they wouldn't consider it
- critical and would cause them as many problems as it would
- solve (they would have to now go and "fix" their software also.)
-
- At least make flags monocase.
-
- Please list all current flags which rely upon case sensitivity
- and what you would replace them with. Worse, we have lost the
- thread of this proposal. Is the case fixed in filenames when the
- kernel interprets them? By the shell? Does the shell now have
- knowledge about what is a flag? If not, how *do* I pass a data
- string (such as sed s/foo/goo) in mixed-case where needed? This
- is often a can of worms in other os's (eg. VMS/DCL) and not what
- I would call an improvement. It might require detailed syntactic
- and semantic knowledge of command formats by the shell(s) as most
- of these monocase systems have (DCL, EXEC etc.) At best it would
- require various new or further overloaded quoting conventions
- (we now have quote, double quote, backslash, ^V and backquote!)
-
- It would be more ergonomic.
-
- Why is having less obviously easier? I thought the freedom
- UNIX gives in creating things like file names to suit whims
- to be a plus. Should we adopt NAME.EXT conventions? Why not?
- Doesn't the structure imposed by .EXT make things "easier" in
- the same sense? What about very long file names? Is this also
- a "pain"? Why have so many of the proponents argued about how
- all this would make it easier ON THE PROGRAMMER? (eg. emulator
- writers, argv interpreters) Is this the person the system's
- interface should be optimized for? What about text processors
- (I mean people)? Do they use the filing system in full case
- or not? Do we care? I just scanned through our dept secty's
- directories (she is a very naive user, she started here with
- UNIX this summer, it also includes a subdir which is the entire
- tree of her predecessor who was a fairly sophisticated UNIX user.)
- It is full of mixed case filenames, most for the obvious reasons
- (PhoneBill, LICENSES (probably to force sorting to the beginning),
- etc.)
-
- Would you please peruse *your* user's directories and report back?
-
- Where does it stop?
-
- What about things like 'r' and 'R' in mail(x)? You may know
- the difference between a shell and an application program,
- but do your users have it as clear or will they see these
- things as gross inconsistencies if not brought into line?
- What about editors ('q' vs 'Q') and other fundamental software?
- Who enforces this (the application or the tty driver)?
-
- The proposal to remove case sensitivity does not analyze the impact on
- the software and the amount of change needed to accomodate this new
- feature. I claim it is ubiquitous, worse, the proposal is ill-defined
- as to exactly where in the software hierarchy this case insensitivity
- is to be implemented. The proposal is pie-in-the-sky and unworkable,
- worse, it is regressive (eg. it actually strives to emulate systems
- designed to be compatible where now outmoded hardware and economies
- were driving forces.)
-
- Take your UNIX system, change everything to lower case. Add the following
- line to your .login or .profile:
-
- stty lcase
-
- report back to us if you still think this is a good idea.
-
- -Barry Shein, Boston University
-
- Volume-Number: Volume 7, Number 60
-
-