Package: libgksu2-0
Version: 2.0.7-1
Severity: important
There's a race condition when reading sudo output, which makes gksudo
practically unusable on certain conditions (on my Yeeloong (mipsel) it
happens every time I try):
- libgksu spawns sudo
- libgksu calls select() and waits for sudo to start printing its
banner message.
- sudo starts printing
- libgksu returns from select() and iterates 50 times attempting to
read the GNOME_SUDO_PASSWORD string.
- sudo keeps printing, eventually printing "GNOME_SUDO_PASSWORD", but
too late...
- libgksu already gave up searching for a password prompt, and assumes
sudo doesn't require one.
Attached patch works around the problem. I'm not sure what would be the
way to fix this, if there's one. I assume you can't just get rid of
O_NONBLOCK.
You can probably reproduce this by inserting a sleep(1) in sudo's main().
-- System Information:
Debian Release: 5.0.1
APT prefers stable
APT policy: (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.26-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=ca_AD.UTF-8, LC_CTYPE=ca_AD.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages libgksu2-0 depends on:
ii gconf2 2.22.0-1 GNOME configuration database syste
ii libatk1.0-0 1.22.0-1 The ATK accessibility toolkit
ii libc6 2.7-18 GNU C Library: Shared libraries
ii libcairo2 1.6.4-7 The Cairo 2D vector graphics libra
ii libfontconfig1 2.6.0-3 generic font configuration library
ii libfreetype6 2.3.7-2 FreeType 2 font engine, shared lib
ii libgconf2-4 2.22.0-1 GNOME configuration database syste
ii libglade2-0 1:2.6.2-1 library to load .glade files at ru
ii libglib2.0-0 2.16.6-1+lenny1 The GLib library of C routines
ii libgnome-keyring0 2.22.3-2 GNOME keyring services library
ii libgtk2.0-0 2.12.12-1~lenny1 The GTK+ graphical user interface
ii libgtop2-7 2.22.3-1 gtop system monitoring library
ii libpango1.0-0 1.20.5-3 Layout and rendering of internatio
ii libpixman-1-0 0.10.0-2 pixel-manipulation library for X a
ii libpng12-0 1.2.27-2+lenny2 PNG library - runtime
ii libstartup-notificatio 0.9-1 library for program launch feedbac
ii libx11-6 2:1.1.5-2 X11 client-side library
ii libxml2 2.6.32.dfsg-5 GNOME XML library
ii libxrender1 1:0.9.4-2 X Rendering Extension client libra
ii xauth 1:1.0.3-2 X authentication utility
ii xbase-clients 1:7.3+18 miscellaneous X clients - metapack
ii zlib1g 1:1.2.3.3.dfsg-12 compression library - runtime
Versions of packages libgksu2-0 recommends:
ii sudo 1.6.9p17-2 Provide limited super user privile
libgksu2-0 suggests no packages.
-- no debconf information
diff -ur libgksu-2.0.7.old/libgksu/libgksu.c libgksu-2.0.7/libgksu/libgksu.c
--- libgksu-2.0.7.old/libgksu/libgksu.c 2008-05-28 02:00:44.000000000 +0200
+++ libgksu-2.0.7/libgksu/libgksu.c 2009-04-27 17:54:02.000000000 +0200
@@ -2625,6 +2626,7 @@
* seeing sudo's lecture, or that some pam module is spitting
* debugging stuff at the screen
*/
+ sleep (1);
for (counter = 0; counter < 50; counter++)
{
if (strncmp (buffer, "GNOME_SUDO_PASS", 15) == 0)
