Date: Mon, 18 Nov 1996 23:41:47 +0100 (MET) From: J Wunsch <j@uriah.heep.sax.de> To: freebsd-bugs@FreeBSD.org (FreeBSD bugs list) Cc: jin@george.lbl.gov Subject: Re: diff somehow does not work properly in 2.2-ALPHA Message-ID: <199611182241.XAA02531@uriah.heep.sax.de> In-Reply-To: <96Nov18.120623pst.177557@crevenia.parc.xerox.com> from Bill Fenner at "Nov 18, 96 12:06:17 pm"
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As Bill Fenner wrote:
> Someone closed stdout, right near the beginning of the program. It
> might even be before main() gets control, my untrained eye can't say.
> It's the last system call before a readlink() of /etc/malloc.conf,
> which might or might not point to something. A section of the
> interpreted ktrace:
> 13410 diff CALL close(0x1)
> 13410 diff RET close 0
> 13410 diff CALL readlink(0x8077d3a,0xefbfd8f0,0x3f)
> 13410 diff NAMI "/etc/malloc.conf"
> 13410 diff RET readlink -1 errno 2 No such file or directory
>
> Since stdout is closed, diff can't write to it later when it wants to
> display its output, thus "write error".
Seems to be intentional. Somehow, writing to the output file
failed:
...
val = compare_files (0, argv[optind], 0, argv[optind + 1], 0);
/* Print any messages that were saved up for last. */
print_message_queue ();
check_stdout ();
exit (val);
return val;
}
...with:
static void
check_stdout ()
{
if (ferror (stdout) || fclose (stdout) != 0)
fatal ("write error");
}
(The malloc is supposedly called as part of the fprintf().)
--
cheers, J"org
joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)
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