Khimenko Victor writes:
> In <20000714202754.28444.qmail@web1906.mail.yahoo.com> Evan Langlois (goth_74@yahoo.com) wrote:
> > Well, according to the man page, fclose() should return EBADF if the passed
> > argument is not an open stream. No where does it say that it segfaults, and
> > the I don't see when it returns EBADF instead of segfaulting.
>
> > I think the library might need to be patched, wherever it is segfaulting.
>
> No. Man page should be updated instead. If your program tried to call fclose
> for something other then open stream you program is seriosly ill. Better to
> fix it then try to band-aid it. And EBADF encourages such band-aids.
I believe the man page is refering the situation caused by:
FILE *f;
f = fopen("/tmp/foo", "w");
close(fileno(f));
/*
* f is still a valid FILE * pointer, but the
* file associated with it has been closed
*/
errno = 0;
fclose(f);
/*
* errno should now contain EBADF
*/
perror("fclose");
Runing the above reveals:
fclose: Bad file descriptor
ie, the behaviour given in the man page. Therefore, the man page is correct.
I think it is a question of interpretation of the man page, which does say:
EBADF The argument stream is not an open stream.
^^^^^^^^^^^
ie, "stream" is still a VALID stream (not a NULL pointer or some other weird
address), as demonstrated in the above program.
_____
|_____| ------------------------------------------------- ---+---+-
| | Russell King rmk@arm.linux.org.uk --- ---
| | | | http://www.arm.linux.org.uk/~rmk/aboutme.html / / |
| +-+-+ --- -+-
/ | THE developer of ARM Linux |+| /|\
/ | | | --- |
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This archive was generated by hypermail 2b29 : Sat Jul 15 2000 - 15:48:16 EDT