Bug#443371: xserver-xorg-core: Server won't start when alternate configuration file specified
Package: xserver-xorg-core
Version: 2:1.4-2
Severity: important
Hi,
If I try to use an alternate configuration file the X server refuses to
start:
$ X -xf86config xorg.conf.test
Fatal server error:
Cannot open log file "/var/log/Xorg.0.log"
xorg.conf.test is in /etc/X11/
This used to work before the 7.3/1.4 upgrade. With those versions,
-config wouldn't work, but -xf86config was ok.
Looking at the X debian wrapper (in x11-common) it seems that if -config
or -xf86config are found in the command line root priviledges are
automatically dropped.
if (!strcmp(argv[i], "-config") || !strcmp(argv[i], "-xf86config")) {
if (setuid(getuid())) {
perror("X unable to drop setuid privileges for
alternate config");
exit(1);
}
}
As a result, the X server won't start at all. Is this behavior really
necessary? The Xorg server will not let non-root users use
configuration files outside /etc/X11 which seems to be a good enough
safeguard.
A google search found that Ubuntu has a patch addressing this issue:
https://lists.ubuntu.com/archives/ubuntu-patches/2007-August/011669.html
"Stop handling -config specifically in the wrapper, as Xorg now handles
this itself."
Would it be possible to apply something like this to Debian?
Thanks,
Ricardo
-- Package-specific info:
Contents of /var/lib/x11/X.roster:
xserver-xorg
/etc/X11/X target does not match checksum in /var/lib/x11/X.md5sum.
X server symlink status:
lrwxrwxrwx 1 root root 13 2006-04-30 14:10 /etc/X11/X -> /usr/bin/Xorg
-rwxr-xr-x 1 root root 1669528 2007-09-16 14:56 /usr/bin/Xorg
Contents of /var/lib/x11/xorg.conf.roster:
xserver-xorg
VGA-compatible devices on PCI bus:
00:01.0 VGA compatible controller: ATI Technologies Inc Rage XL (rev 27)
/var/lib/x11/xorg.conf.md5sum does not exist.
Xorg X server configuration file status:
-rw-r--r-- 1 root root 3110 2007-09-11 17:19 /etc/X11/xorg.conf
Contents of /etc/X11/xorg.conf:
# xorg.conf (Xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following commands as root:
#
# cp /etc/X11/xorg.conf /etc/X11/xorg.conf.custom
# md5sum /etc/X11/xorg.conf >/var/lib/xfree86/xorg.conf.md5sum
# dpkg-reconfigure xserver-xorg
Section "Files"
FontPath "unix/:7100" # local font server
# if the local font server has problems, we can fall back on these
FontPath "/usr/share/fonts/X11/misc"
FontPath "/usr/lib/X11/fonts/misc"
FontPath "/usr/share/fonts/X11/cyrillic"
FontPath "/usr/lib/X11/fonts/cyrillic"
FontPath "/usr/lib/X11/fonts/100dpi/:unscaled"
FontPath "/usr/lib/X11/fonts/75dpi/:unscaled"
FontPath "/usr/share/fonts/X11/Type1"
FontPath "/usr/lib/X11/fonts/Type1"
FontPath "/usr/share/fonts/X11/CID"
FontPath "/usr/lib/X11/fonts/CID"
FontPath "/usr/share/fonts/X11/100dpi"
FontPath "/usr/lib/X11/fonts/100dpi"
FontPath "/usr/share/fonts/X11/75dpi"
FontPath "/usr/lib/X11/fonts/75dpi"
EndSection
Section "Module"
Load "bitmap"
Load "dbe"
Load "ddc"
Load "dri"
Load "extmod"
Load "freetype"
Load "glx"
Load "int10"
Load "record"
Load "type1"
Load "vbe"
Load "vnc"
EndSection
Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc104"
Option "XkbLayout" "us"
EndSection
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ImPS/2"
Option "Emulate3Buttons" "true"
Option "ZAxisMapping" "4 5"
EndSection
Section "Device"
Identifier "ATI Technologies, Inc. Rage XL"
Driver "thincdev"
EndSection
Section "Monitor"
Identifier "Generic Monitor"
Option "DPMS"
HorizSync 28-49
VertRefresh 43-72
EndSection
Section "Screen"
Identifier "Default Screen"
Device "ATI Technologies, Inc. Rage XL"
Monitor "Generic Monitor"
DefaultDepth 24
SubSection "Display"
Depth 1
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 4
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 15
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1024x768" "800x600" "640x480"
EndSubSection
EndSection
Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
EndSection
Section "DRI"
Mode 0666
EndSection
No Xorg X server log files found.
-- System Information:
Debian Release: lenny/sid
APT prefers unstable
APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.18-4-686 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages xserver-xorg-core depends on:
ii libc6 2.6.1-5 GNU C Library: Shared libraries
ii libdbus-1-3 1.1.1-3 simple interprocess messaging syst
ii libdrm2 2.3.0-4 Userspace interface to kernel DRM
ii libfontenc1 1:1.0.4-2 X11 font encoding library
ii libgcc1 1:4.2.1-5 GCC support library
ii libhal1 0.5.9.1-4 Hardware Abstraction Layer - share
ii libpixman-1-0 0.9.5-1 pixel-manipulation library for X a
ii libxau6 1:1.0.3-2 X11 authorisation library
ii libxdmcp6 1:1.0.2-2 X11 Display Manager Control Protoc
ii libxfont1 1:1.3.1-1 X11 font rasterisation library
ii x11-common 1:7.3+2 X Window System (X.Org) infrastruc
ii xserver-xorg 1:7.3+2 the X.Org X server
Versions of packages xserver-xorg-core recommends:
ii xfonts-base 1:1.0.0-5 standard fonts for X
ii xkb-data 1.0~cvs.20070916-1 X Keyboard Extension (XKB) configu
-- no debconf information
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