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From: piet@cs.ruu.nl (Piet van Oostrum)
Newsgroups: comp.sys.atari.st
Subject: TOS problem ?
Message-ID: <1708@ruuinf.cs.ruu.nl>
Date: 15 Oct 89 15:29:10 GMT
Sender: news@ruuinf.cs.ruu.nl
Reply-To: piet@cs.ruu.nl (Piet van Oostrum)
Organization: Dept of Computer Science, University of Utrecht, Holland
Lines: 36

I encountered a strange TOS behaviour (TOS 1.2):

I Fcreate a file, then Fopen the same file (not very usual, I agree). I get
two filehandles of course. I only use the second one, and write some bytes
to the file. Finally I close the second handle, and forget to close the
first one, (or close that last). Result: an empty file. If the first
filehandle is closed first, no problem.

My guess is that the close on the first filehandle (either implicit or
explicit) remembers that nothing has been written on this handle, so the
file should be empty (???)

Note: the compiler has long ints (GCC).

Any comments? Is this a bug? Here is the program:

------------------------------------------------------------------------
#include <osbind.h>
char fname[] = "test.fil";
char message[] = "this is a line\n";
main()
{
	int fd1, fd2, r;
	
	fd1 = Fcreate(fname, 0);
	fd2 = Fopen(fname, 1);
	r = Fwrite(fd2, strlen(message), message);
	printf ("fd1=%d,fd2=%d,result=%d\n",fd1,fd2,r);
	Fclose (fd2);
	Fclose (fd1); /* or just delete this line */
}
-------------------------------------------------------------------------- 
Piet van Oostrum, Dept of Computer Science, University of Utrecht
Padualaan 14, P.O. Box 80.089, 3508 TB Utrecht,  The Netherlands.
Telephone: +31-30-531806      Internet: piet@cs.ruu.nl
Telefax:   +31-30-513791      Uucp: uunet!mcsun!hp4nl!ruuinf!piet