Bug#94892: marked as done (libXaw error when open() returns fd 0)
Your message dated Tue, 11 Dec 2001 16:25:53 +0100
with message-id <20011211162553.A26671@jagor.srce.hr>
and subject line Fixed in xxgdb 1.12-9.4potato
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From: Massimo Dal Zotto <dz@cs.unitn.it>
Message-Id: <200104221234.OAA02581@nikita.dz.net>
Subject: libXaw error when open() returns fd 0
To: submit@bugs.debian.org
Date: Sun, 22 Apr 2001 14:34:24 +0200 (MEST)
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Package: xlib6g
Version: 3.3.6-11potato32
Severity: serious
After upgrading xlib6g to version 3.3.6-11potato32 the xxgdb source window
can't display the source text. The error printed on stderr is:
Warning: Cannot open file /tmp/nap-1.4.4-ps8/nap.c; Resource temporarily unavailable
Tracing xxgdb gives the following interesting output:
[pid 31074] access("/tmp/nap-1.4.4-ps8/nap.c", R_OK) = 0
[pid 31074] open("/tmp/nap-1.4.4-ps8/nap.c", O_RDONLY) = 0
[pid 31074] fstat(0, {st_mode=S_IFREG|0644, st_size=48333, ...}) = 0
[pid 31074] brk(0x80b6000) = 0x80b6000
[pid 31074] read(0, "/* Copyright (c) 2000 Kevin Sul"..., 48334) = 48333
[pid 31074] brk(0x80b9000) = 0x80b9000
[pid 31074] close(0) = 0
[pid 31074] open("/tmp/nap-1.4.4-ps8/nap.c", O_RDONLY) = 0
[pid 31074] open("/usr/X11R6/lib/X11/XtErrorDB", O_RDONLY) = -1 ENOENT (No such file or directory)
[pid 31074] getuid() = 0
[pid 31074] geteuid() = 0
[pid 31074] getuid() = 0
[pid 31074] write(2, "Warning: ", 9Warning: ) = 9
[pid 31074] write(2, "Cannot open file /home/dz/src/pa"..., 99Cannot open file /tmp/nap-1.4.4-ps8/nap.c; Resource temporarily unavailable) = 99
[pid 31074] write(2, "\n", 1
) = 1
After examining the xxgdb sources I have deduced that the bug is in libXaw
which signals an error if the fd returned by open() is 0. This is confirmed
by the fact that the following patch to xxgdb fixes the bug:
--- xxgdb-1.12/calldbx.c.orig Sun Apr 22 12:23:18 2001
+++ xxgdb-1.12/calldbx.c Sun Apr 22 13:59:34 2001
@@ -325,6 +325,10 @@
close(0);
close(1);
+ /* Reallocate fd 0 and 1 to prevent libXaw bug in DisplayFile() - dz */
+ open("/dev/null", O_RDONLY);
+ open("/dev/null", O_RDONLY);
+
#ifdef _POSIX_SOURCE
fcntl(master, F_SETFL, O_NONBLOCK);
#else
Packages installed:
$ ldd xxgdb
libXaw.so.6 => /usr/X11R6/lib/libXaw.so.6 (0x40014000)
libXmu.so.6 => /usr/X11R6/lib/libXmu.so.6 (0x4004d000)
libXt.so.6 => /usr/X11R6/lib/libXt.so.6 (0x4005f000)
libSM.so.6 => /usr/X11R6/lib/libSM.so.6 (0x400a7000)
libICE.so.6 => /usr/X11R6/lib/libICE.so.6 (0x400b0000)
libXext.so.6 => /usr/X11R6/lib/libXext.so.6 (0x400c6000)
libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x400d2000)
libc.so.6 => /lib/libc.so.6 (0x4017a000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
$ dpkg -l xxgdb gdb libc6 xlib6g
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name Version Description
+++-========-================-=================================================
ii xxgdb 1.12-9.3 A X front-end to the GNU debugger gdb
ii gdb 4.18.19990928-1 The GNU Debugger
ii libc6 2.1.3-17 GNU C Library: Shared libraries and Timezone data
ii xlib6g 3.3.6-11potato32 shared libraries required by X clients
--
Massimo Dal Zotto
+----------------------------------------------------------------------+
| Massimo Dal Zotto email: dz@cs.unitn.it |
| Via Marconi, 141 phone: ++39-0461534251 |
| 38057 Pergine Valsugana (TN) www: http://www.cs.unitn.it/~dz/ |
| Italy pgp: see my www home page |
+----------------------------------------------------------------------+
---------------------------------------
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>From mvela@public.srce.hr Tue Dec 11 09:28:59 2001
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Date: Tue, 11 Dec 2001 16:25:53 +0100
From: Matej Vela <vela@debian.org>
To: 94892-done@bugs.debian.org
Subject: Fixed in xxgdb 1.12-9.4potato
Message-ID: <20011211162553.A26671@jagor.srce.hr>
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Here are the relevant changelog entries:
xxgdb (1.12-9.4potato) stable; urgency=low
[...]
* Applied a patch from Massimo Dal Zotto <dz@cs.unitn.it>. This is a
workaround for a serious bug (#94892) in libXaw.
-- Bas Zoetekouw <bas@debian.org> Sun, 22 Apr 2001 20:47:42 +0200
xfree86 (4.1.0-1) unstable; urgency=medium
[...]
* patch #000_post-410: some fixes from xf-4_1-branch:
[...]
+ Fix problem in Ib/Xaw/AsciiSrc.c:nitStringOrFile() when descriptor 0
is closed, as a zero return value from open(2) is taken as an error
(splite at purdue.edu).
[...]
-- Branden Robinson <branden@debian.org> Sat, 28 Jul 2001 00:37:19 -0500
(Unfortunately, xxgdb 1.12-9.4potato is stuck in potato-proposed-updates,
but keeping this bug open won't change that.)
Thanks,
Matej
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