Date: Tue, 29 Jul 2003 12:57:55 +0300 (EEST) From: Roman Nikitchenko <hc@www.trifle.net> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/55007: btoken close() on kqueue filter descriptors. Message-ID: <200307290957.h6T9vtbt082701@www.trifle.net> Resent-Message-ID: <200307291000.h6TA0XTB007201@freefall.freebsd.org>
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>Number: 55007
>Category: kern
>Synopsis: btoken close() on kqueue filter descriptors.
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Jul 29 03:00:32 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator: Roman Nikitchenko
>Release: FreeBSD 4.8-STABLE i386
>Organization:
Trifle Co. Ltd.
>Environment:
System: FreeBSD hc.apex.dp.ua 4.8-STABLE FreeBSD 4.8-STABLE #0: Mon Jul 28 18:51:32 EEST 2003 hc@hc.apex.dp.ua:/usr/src/sys/compile/HC i386
>Description:
File descriptors obtained through kqueue() call can't be closed using
uthread_close() because of non-libc_r kqueue() implementation and
_thread_fd_table checks on uthread_close(). I see this behaviour after
checks in /usr/src/lib/libc_r/uthread/uthread_close.c in the
following branches:
MAIN: after revision 1.14, RELENG_4_8_BP after revision 1.10.2.4.
>How-To-Repeat:
Link against libc_r anything like this:
int poller = kqueue();
if ( close( poller ) < 0 )
perror( "close" );
>Fix:
Write uthread_kqueue() function inserting new kqueue() descriptor into
_thread_fd_table (maybe better way exists, but this is all i found).
As workaround: syscall( SYS_close, fd ), but this is too dirty.
>Release-Note:
>Audit-Trail:
>Unformatted:
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