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Mail Archives: djgpp/1992/05/04/15:06:31

From: Eric Backus <ericb AT lsid DOT hp DOT com>
Subject: Comments on 1.06
To: djgpp AT sun DOT soe DOT clarkson DOT edu (djgpp)
Date: Mon, 4 May 92 11:04:28 PDT
Mailer: Elm [revision: 66.25]
Status: O

I just unpacked djgpp 1.06 and have tried a few preliminary compiles.
Some comments:

	1. (Almost) everything works very nicely.  Thanks, DJ!

	2. The stat() function seems to work correctly, but fstat()
	   never indicates that I have write permission if I look at
	   the st_mode field.  This is certainly a bug, but since it's
	   in the Turbo C code, I can't fix it (all I have is gcc).

	3. When I use stat() on a file, the value returned in the
	   st_dev field varies from call to call.  This is not
	   currently a problem for me, but it seems strange.  Can
	   anyone explain what's going on?

	4. It's nice that GO32 can now do globbing, but unfortunatly
	   it's MS-DOS style globbing.  (Boo hiss!)  Back on 1.05, I
	   wrote a new version of crt0.o that does globbing the
	   correct (UNIX) way.  The drawbacks of this are:
		A. All programs get bigger since they include the
		   globbing code.
		B. Since GNU code is used to do the globbing, all
		   programs fall under the GNU copyleft.
	   If anyone is interested in this version of crt0.o, let me
	   know.

	5. I notice that it is not possible to open() a directory.  On
	   UNIX, it is possible to open() a directory for reading but
	   not for writing.  I'm not sure even this is a legitimate
	   thing to do on MS-DOS, but I have code (source code for the
	   zoo archiver) which does this.  My question is, does open()
	   fail because someone specifically wanted it to fail, or is
	   this just a bug that fell through the cracks?

	6. I'd like to be able to set the timestamp of a file.  I
	   checked for the utime() or utimes() functions, but they are
	   stubbed out.  Is there some other function to do this?  If
	   not, can someone tell me how I would write these functions?
	   Presumably I'd have to do some sort of DOS interrupt call?

	7. Like others, I have not been able to use gprof.  A program
	   compiled with -pg gets an exception when run.  I'd guess
	   the problem is with the chaining of the DOS timer
	   interrupt, but I'm no expert.
--
				Eric Backus
				ericb%hplsla AT hplabs DOT hp DOT com
				(206) 335-2495

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