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add Xdummy script to start a headless X11 server
2011-07-25 15:37:46 +02:00
#!/bin/sh
# ----------------------------------------------------------------------
# Copyright (C) 2005-2010 Karl J. Runge <runge@karlrunge.com>
# All rights reserved.
#
# This file is part of Xdummy.
#
# Xdummy is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or (at
# your option) any later version.
#
# Xdummy is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Xdummy; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA
# or see <http://www.gnu.org/licenses/>.
# ----------------------------------------------------------------------
#
#
# Xdummy: an LD_PRELOAD hack to run a stock Xorg(1) or XFree86(1) server
# with the "dummy" video driver to make it avoid Linux VT switching, etc.
#
# Run "Xdummy -help" for more info.
#
install=""
uninstall=""
runit=1
prconf=""
notweak=""
root=""
nosudo=""
xserver=""
geom=""
nomodelines=""
depth=""
debug=""
strace=""
cmdline_config=""
PATH=$PATH:/bin:/usr/bin
export PATH
program=`basename "$0"`
help () {
${PAGER:-more} << END
$program:
A hack to run a stock Xorg(1) or XFree86(1) X server with the "dummy"
(RAM-only framebuffer) video driver such that it AVOIDS the Linux VT
switching, opening device files in /dev, keyboard and mouse conflicts,
and other problems associated with the normal use of "dummy".
In other words, it tries to make Xorg/XFree86 with the "dummy"
device driver act more like Xvfb(1).
The primary motivation for the Xdummy script is to provide a virtual X
server for x11vnc but with more features than Xvfb (or Xvnc); however
it could be used for other reasons (e.g. better automated testing
than with Xvfb.) One nice thing is the dummy server supports RANDR
dynamic resizing while Xvfb does not.
So, for example, x11vnc+Xdummy terminal services are a little better
than x11vnc+Xvfb.
To achieve this, while running the real Xserver $program intercepts
system and library calls via the LD_PRELOAD method and modifies
the behavior to make it work correctly (e.g. avoid the VT stuff.)
LD_PRELOAD tricks are usually "clever hacks" and so might not work
in all situations or break when something changes.
WARNING: Take care in using Xdummy, although it never has it is
possible that it could damage hardware. One can use the -prconf
option to have it print out the xorg.conf config that it would use
and then inspect it carefully before actually using it.
This program no longer needs to be run as root as of 12/2009.
However, if there are problems for certain situations (usually older
servers) it may perform better if run as root (use the -root option.)
When running as root remember the previous paragraph and that Xdummy
comes without any warranty.
gcc/cc and other build tools are required for this script to be able
to compile the LD_PRELOAD shared object. Be sure they are installed
on the system. See -install and -uninstall described below.
Your Linux distribution may not install the dummy driver by default,
e.g:
/usr/lib/xorg/modules/drivers/dummy_drv.so
some have it in a package named xserver-xorg-video-dummy you that
need to install.
Usage:
$program <${program}-args> <Xserver-args>
(actually, the arguments can be supplied in any order.)
Examples:
$program -install
$program :1
$program -debug :1
$program -tmpdir ~/mytmp :1 -nolisten tcp
startx example:
startx -e bash -- $program :2 -depth 16
(if startx needs to be run as root, you can su(1) to a normal
user in the bash shell and then launch ~/.xinitrc or ~/.xsession,
gnome-session, startkde, startxfce4, etc.)
xdm example:
xdm -config /usr/local/dummy/xdm-config -nodaemon
where the xdm-config file has line:
DisplayManager.servers: /usr/local/dummy/Xservers
and /usr/local/dummy/Xservers has lines:
:1 local /usr/local/dummy/Xdummy :1 -debug
:2 local /usr/local/dummy/Xdummy :2 -debug
(-debug is optional)
gdm/kdm example:
TBD.
Root permission and x11vnc:
Update: as of 12/2009 this program no longer must be run as root.
So try it as non-root before running it as root and/or the
following schemes.
In some circumstances X server program may need to be run as root.
If so, one could run x11vnc as root with -unixpw (it switches
to the user that logs in) and that may be OK, some other ideas:
- add this to sudo via visudo:
ALL ALL = NOPASSWD: /usr/local/bin/Xdummy
- use this little suid wrapper:
/*
* xdummy.c
*
cc -o ./xdummy xdummy.c
sudo cp ./xdummy /usr/local/bin/xdummy
sudo chown root:root /usr/local/bin/xdummy
sudo chmod u+s /usr/local/bin/xdummy
*
*/
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <stdio.h>
int main (int argc, char *argv[]) {
extern char **environ;
char str[100];
sprintf(str, "XDUMMY_UID=%d", (int) getuid());
putenv(str);
setuid(0);
setgid(0);
execv("/usr/local/bin/Xdummy", argv);
exit(1);
return 1;
}
Options:
${program}-args:
-install Compile the LD_PRELOAD shared object and install it
next to the $program script file as:
$0.so
When that file exists it is used as the LD_PRELOAD
shared object without recompiling. Otherwise,
each time $program is run the LD_PRELOAD shared
object is compiled as a file in /tmp (or -tmpdir)
If you set the environment variable
INTERPOSE_GETUID=1 when building, then when
$program is run as an ordinary user, the shared
object will interpose getuid() calls and pretend
to be root. Otherwise it doesn't pretend to
be root.
You can also set the CFLAGS environment variable
to anything else you want on the compile cmdline.
-uninstall Remove the file:
$0.so
The LD_PRELOAD shared object will then be compiled
each time this program is run.
The X server is not started under -install, -uninstall, or -prconf.
:N The DISPLAY (e.g. :15) is often the first
argument. It is passed to the real X server and
also used by the Xdummy script as an identifier.
-geom geom1[,geom2...] Take the geometry (e.g. 1024x768) or list
of geometries and insert them into the Screen
section of the tweaked X server config file.
Use this to have a different geometry than the
one(s) in the system config file.
The option -geometry can be used instead of -geom;
x11vnc calls Xdummy and Xvfb this way.
-nomodelines When you specify -geom/-geometry, $program will
create Modelines for each geometry and put them
in the Monitor section. If you do not want this
then supply -nomodelines.
-depth n Use pixel color depth n (e.g. 8, 16, or 24). This
makes sure the X config file has a Screen.Display
subsection of this depth. Note this option is
ALSO passed to the X server.
-DEPTH n Same as -depth, except not passed to X server.
-tmpdir dir Specify a temporary directory, owned by you and
only writable by you. This is used in place of
/tmp/Xdummy.\$USER/.. to place the $program.so
shared object, tweaked config files, etc.
-nonroot Run in non-root mode (working 12/2009, now default)
-root Run as root (may still be needed in some
environments.) Same as XDUMMY_RUN_AS_ROOT=1.
-nosudo Do not try to use sudo(1) when re-running as root,
use su(1) instead.
-xserver path Specify the path to the Xserver to use. Default
is to try "Xorg" first and then "XFree86". If
those are not in \$PATH, it tries these locations:
/usr/bin/Xorg
/usr/X11R6/bin/Xorg
/usr/X11R6/bin/XFree86
-n Do not run the command to start the X server,
just show the command that $program would run.
The LD_PRELOAD shared object will be built,
if needed. Also note any XDUMMY* environment
variables that need to be set.
-prconf Print, to stdout, the tweaked Xorg/XFree86
config file (-config and -xf86config server
options, respectively.) The Xserver is not
started.
-notweak Do not tweak (modify) the Xorg/XFree86 config file
(system or server command line) at all. The -geom
and similar config file modifications are ignored.
It is up to you to make sure it is a working
config file (e.g. "dummy" driver, etc.)
Perhaps you want to use a file based on the
-prconf output.
-debug Extra debugging output.
-strace strace(1) the Xserver process (for troubleshooting.)
-ltrace ltrace(1) instead of strace (can be slow.)
-h, -help Print out this help.
Xserver-args:
Most of the Xorg and XFree86 options will work and are simply
passed along if you supply them. Important ones that may be
supplied if missing:
:N X Display number for server to use.
vtNN Linux virtual terminal (VT) to use (a VT is currently
still used, just not switched to and from.)
-config file Driver "dummy" tweaked config file, a
-xf86config file number of settings are tweaked besides Driver.
If -config/-xf86config is not given, the system one
(e.g. /etc/X11/xorg.conf) is used. If the system one cannot be
found, a built-in one is used. Any settings in the config file
that are not consistent with "dummy" mode will be overwritten
(unless -notweak is specified.)
Use -config xdummy-builtin to force usage of the builtin config.
If "file" is only a basename (e.g. "xorg.dummy.conf") with no /'s,
then no tweaking of it is done: the X server will look for that
basename via its normal search algorithm. If the found file does
not refer to the "dummy" driver, etc, then the X server will fail.
Notes:
The Xorg/XFree86 "dummy" driver is currently undocumented. It works
well in this mode, but it is evidently not intended for end-users.
So it could be removed or broken at any time.
If the display Xserver-arg (e.g. :1) is not given, or ":" is given
that indicates $program should try to find a free one (based on
tcp ports.)
If the display virtual terminal, VT, (e.g. vt9) is not given that
indicates $program should try to find a free one (or guess a high one.)
This program is not completely secure WRT files in /tmp (but it tries
to a good degree.) Better is to use the -tmpdir option to supply a
directory only writable by you. Even better is to get rid of users
on the local machine you do not trust :-)
Set XDUMMY_SET_XV=1 to turn on debugging output for this script.
END
}
warn() {
echo "$*" 1>&2
}
if [ "X$XDUMMY_SET_XV" != "X" ]; then
set -xv
fi
if [ "X$XDUMMY_UID" = "X" ]; then
XDUMMY_UID=`id -u`
export XDUMMY_UID
fi
if [ "X$XDUMMY_UID" = "X0" ]; then
if [ "X$SUDO_UID" != "X" ]; then
XDUMMY_UID=$SUDO_UID
export XDUMMY_UID
fi
fi
# check if root=1 first:
#
if [ "X$XDUMMY_RUN_AS_ROOT" = "X1" ]; then
root=1
fi
for arg in $*
do
if [ "X$arg" = "X-nonroot" ]; then
root=""
elif [ "X$arg" = "X-root" ]; then
root=1
fi
done
# See if it really needs to be run as root:
#
if [ "X$XDUMMY_SU_EXEC" = "X" -a "X$root" = "X1" -a "X`id -u`" != "X0" ]; then
# this is to prevent infinite loop in case su/sudo doesn't work:
XDUMMY_SU_EXEC=1
export XDUMMY_SU_EXEC
dosu=1
nosudo=""
for arg in $*
do
if [ "X$arg" = "X-nonroot" ]; then
dosu=""
elif [ "X$arg" = "X-nosudo" ]; then
nosudo="1"
elif [ "X$arg" = "X-help" ]; then
dosu=""
elif [ "X$arg" = "X-h" ]; then
dosu=""
elif [ "X$arg" = "X-install" ]; then
dosu=""
elif [ "X$arg" = "X-uninstall" ]; then
dosu=""
elif [ "X$arg" = "X-n" ]; then
dosu=""
elif [ "X$arg" = "X-prconf" ]; then
dosu=""
fi
done
if [ $dosu ]; then
# we need to restart it with su/sudo:
if type sudo > /dev/null 2>&1; then
:
else
nosudo=1
fi
if [ "X$nosudo" = "X" ]; then
warn "$program: supply the sudo password to restart as root:"
if [ "X$XDUMMY_UID" != "X" ]; then
exec sudo $0 -uid $XDUMMY_UID "$@"
else
exec sudo $0 "$@"
fi
else
warn "$program: supply the root password to restart as root:"
if [ "X$XDUMMY_UID" != "X" ]; then
exec su -c "$0 -uid $XDUMMY_UID $*"
else
exec su -c "$0 $*"
fi
fi
# DONE:
exit
fi
fi
# This will hold the X display, e.g. :20
#
disp=""
args=""
cmdline_config=""
# Process Xdummy args:
#
while [ "X$1" != "X" ]
do
if [ "X$1" = "X-config" -o "X$1" = "X-xf86config" ]; then
cmdline_config="$2"
fi
case $1 in
":"*) disp=$1
;;
"-install") install=1; runit=""
;;
"-uninstall") uninstall=1; runit=""
;;
"-n") runit=""
;;
"-no") runit=""
;;
"-norun") runit=""
;;
"-prconf") prconf=1; runit=""
;;
"-notweak") notweak=1
;;
"-noconf") notweak=1
;;
"-nonroot") root=""
;;
"-root") root=1
;;
"-nosudo") nosudo=1
;;
"-xserver") xserver="$2"; shift
;;
"-uid") XDUMMY_UID="$2"; shift
export XDUMMY_UID
;;
"-geom") geom="$2"; shift
;;
"-geometry") geom="$2"; shift
;;
"-nomodelines") nomodelines=1
;;
"-depth") depth="$2"; args="$args -depth $2";
shift
;;
"-DEPTH") depth="$2"; shift
;;
"-tmpdir") XDUMMY_TMPDIR="$2"; shift
;;
"-debug") debug=1
;;
"-nodebug") debug=""
;;
"-strace") strace=1
;;
"-ltrace") strace=2
;;
"-h") help; exit 0
;;
"-help") help; exit 0
;;
*) args="$args $1"
;;
esac
shift
done
# Try to get a username for use in our tmp directory, etc.
#
user=""
if [ X`id -u` = "X0" ]; then
user=root # this will also be used below for id=0
elif [ "X$USER" != "X" ]; then
user=$USER
elif [ "X$LOGNAME" != "X" ]; then
user=$LOGNAME
fi
# Keep trying...
#
if [ "X$user" = "X" ]; then
user=`whoami 2>/dev/null`
fi
if [ "X$user" = "X" ]; then
user=`basename "$HOME"`
fi
if [ "X$user" = "X" -o "X$user" = "X." ]; then
user="u$$"
fi
if [ "X$debug" = "X1" -a "X$runit" != "X" ]; then
echo ""
echo "/usr/bin/env:"
env | egrep -v '^(LS_COLORS|TERMCAP)' | sort
echo ""
fi
# Function to compile the LD_PRELOAD shared object:
#
make_so() {
# extract code embedded in this script into a tmp C file:
n1=`grep -n '^#code_begin' $0 | head -1 | awk -F: '{print $1}'`
n2=`grep -n '^#code_end' $0 | head -1 | awk -F: '{print $1}'`
n1=`expr $n1 + 1`
dn=`expr $n2 - $n1`
tmp=$tdir/Xdummy.$RANDOM$$.c
rm -f $tmp
if [ -e $tmp -o -h $tmp ]; then
warn "$tmp still exists."
exit 1
fi
touch $tmp || exit 1
tail -n +$n1 $0 | head -n $dn > $tmp
# compile it to Xdummy.so:
if [ -f "$SO" ]; then
mv $SO $SO.$$
rm -f $SO.$$
fi
rm -f $SO
touch $SO
if [ ! -f "$SO" ]; then
SO=$tdir/Xdummy.$user.so
warn "warning switching LD_PRELOAD shared object to: $SO"
fi
if [ -f "$SO" ]; then
mv $SO $SO.$$
rm -f $SO.$$
fi
rm -f $SO
# we assume gcc:
if [ "X$INTERPOSE_GETUID" = "X1" ]; then
CFLAGS="$CFLAGS -DINTERPOSE_GETUID"
fi
echo "$program:" cc -shared -fPIC $CFLAGS -o $SO $tmp
cc -shared -fPIC $CFLAGS -o $SO $tmp
rc=$?
rm -f $tmp
if [ $rc != 0 ]; then
warn "$program: cannot build $SO"
exit 1
fi
if [ "X$debug" != "X" -o "X$install" != "X" ]; then
warn "$program: created $SO"
ls -l "$SO"
fi
}
# Set tdir to tmp dir for make_so():
if [ "X$XDUMMY_TMPDIR" != "X" ]; then
tdir=$XDUMMY_TMPDIR
mkdir -p $tdir
else
tdir="/tmp"
fi
# Handle -install/-uninstall case:
SO=$0.so
if [ "X$install" != "X" -o "X$uninstall" != "X" ]; then
if [ -e "$SO" -o -h "$SO" ]; then
warn "$program: removing $SO"
fi
if [ -f "$SO" ]; then
mv $SO $SO.$$
rm -f $SO.$$
fi
rm -f $SO
if [ -e "$SO" -o -h "$SO" ]; then
warn "warning: $SO still exists."
exit 1
fi
if [ $install ]; then
make_so
if [ ! -f "$SO" ]; then
exit 1
fi
fi
exit 0
fi
# We need a tmp directory for the .so, tweaked config file, and for
# redirecting filenames we cannot create (under -nonroot)
#
tack=""
if [ "X$XDUMMY_TMPDIR" = "X" ]; then
XDUMMY_TMPDIR="/tmp/Xdummy.$user"
# try to tack on a unique subdir (display number or pid)
# to allow multiple instances
#
if [ "X$disp" != "X" ]; then
t0=$disp
else
t0=$1
fi
tack=`echo "$t0" | sed -e 's/^.*://'`
if echo "$tack" | grep '^[0-9][0-9]*$' > /dev/null; then
:
else
tack=$$
fi
if [ "X$tack" != "X" ]; then
XDUMMY_TMPDIR="$XDUMMY_TMPDIR/$tack"
fi
fi
tmp=$XDUMMY_TMPDIR
if echo "$tmp" | grep '^/tmp' > /dev/null; then
if [ "X$tmp" != "X/tmp" -a "X$tmp" != "X/tmp/" ]; then
# clean this subdir of /tmp out, otherwise leave it...
rm -rf $XDUMMY_TMPDIR
if [ -e $XDUMMY_TMPDIR ]; then
warn "$XDUMMY_TMPDIR still exists"
exit 1
fi
fi
fi
mkdir -p $XDUMMY_TMPDIR
chmod 700 $XDUMMY_TMPDIR
if [ "X$tack" != "X" ]; then
chmod 700 `dirname "$XDUMMY_TMPDIR"` 2>/dev/null
fi
# See if we can write something there:
#
tfile="$XDUMMY_TMPDIR/test.file"
touch $tfile
if [ ! -f "$tfile" ]; then
XDUMMY_TMPDIR="/tmp/Xdummy.$$.$USER"
warn "warning: setting tmpdir to $XDUMMY_TMPDIR ..."
rm -rf $XDUMMY_TMPDIR || exit 1
mkdir -p $XDUMMY_TMPDIR || exit 1
fi
rm -f $tfile
export XDUMMY_TMPDIR
# Compile the LD_PRELOAD shared object if needed (needs XDUMMY_TMPDIR)
#
if [ ! -f "$SO" ]; then
SO="$XDUMMY_TMPDIR/Xdummy.so"
make_so
fi
# Decide which X server to use:
#
if [ "X$xserver" = "X" ]; then
if type Xorg >/dev/null 2>&1; then
xserver="Xorg"
elif type XFree86 >/dev/null 2>&1; then
xserver="XFree86"
elif -x /usr/bin/Xorg; then
xserver="/usr/bin/Xorg"
elif -x /usr/X11R6/bin/Xorg; then
xserver="/usr/X11R6/bin/Xorg"
elif -x /usr/X11R6/bin/XFree86; then
xserver="/usr/X11R6/bin/XFree86"
fi
if [ "X$xserver" = "X" ]; then
# just let it fail below.
xserver="/usr/bin/Xorg"
warn "$program: cannot locate a stock Xserver... assuming $xserver"
fi
fi
# See if the binary is suid or not readable under -nonroot mode:
#
if [ "X$BASH_VERSION" != "X" ]; then
xserver_path=`type -p $xserver 2>/dev/null`
else
xserver_path=`type $xserver 2>/dev/null | awk '{print $NF}'`
fi
if [ -e "$xserver_path" -a "X$root" = "X" -a "X$runit" != "X" ]; then
if [ ! -r $xserver_path -o -u $xserver_path -o -g $xserver_path ]; then
# XXX not quite correct with rm -rf $XDUMMY_TMPDIR ...
# we keep on a filesystem we know root can write to.
base=`basename "$xserver_path"`
new="/tmp/$base.$user.bin"
if [ -e $new ]; then
snew=`ls -l $new | awk '{print $5}' | grep '^[0-9][0-9]*$'`
sold=`ls -l $xserver_path | awk '{print $5}' | grep '^[0-9][0-9]*$'`
if [ "X$snew" != "X" -a "X$sold" != "X" -a "X$sold" != "X$snew" ]; then
warn "removing different sized copy:"
ls -l $new $xserver_path
rm -f $new
fi
fi
if [ ! -e $new -o ! -s $new ]; then
rm -f $new
touch $new || exit 1
chmod 700 $new || exit 1
if [ ! -r $xserver_path ]; then
warn ""
warn "NEED TO COPY UNREADABLE $xserver_path to $new as root:"
warn ""
ls -l $xserver_path 1>&2
warn ""
warn "This only needs to be done once:"
warn " cat $xserver_path > $new"
warn ""
nos=$nosudo
if type sudo > /dev/null 2>&1; then
:
else
nos=1
fi
if [ "X$nos" = "X1" ]; then
warn "Please supply root passwd to 'su -c'"
su -c "cat $xserver_path > $new"
else
warn "Please supply the sudo passwd if asked:"
sudo /bin/sh -c "cat $xserver_path > $new"
fi
else
warn ""
warn "COPYING SETUID $xserver_path to $new"
warn ""
ls -l $xserver_path 1>&2
warn ""
cat $xserver_path > $new
fi
ls -l $new
if [ -s $new ]; then
:
else
rm -f $new
ls -l $new
exit 1
fi
warn ""
warn "Please restart Xdummy now."
exit 0
fi
if [ ! -O $new ]; then
warn "file \"$new\" not owned by us!"
ls -l $new
exit 1
fi
xserver=$new
fi
fi
# Work out display:
#
if [ "X$disp" != "X" ]; then
:
elif [ "X$1" != "X" ]; then
if echo "$1" | grep '^:[0-9]' > /dev/null; then
disp=$1
shift
elif [ "X$1" = "X:" ]; then
# ":" means for us to find one.
shift
fi
fi
if [ "X$disp" = "X" -o "X$disp" = "X:" ]; then
# try to find an open display port:
# (tcp outdated...)
ports=`netstat -ant | grep LISTEN | awk '{print $4}' | sed -e 's/^.*://'`
n=0
while [ $n -le 20 ]
do
port=`printf "60%02d" $n`
if echo "$ports" | grep "^${port}\$" > /dev/null; then
:
else
disp=":$n"
warn "$program: auto-selected DISPLAY $disp"
break
fi
n=`expr $n + 1`
done
fi
# Work out which vt to use, try to find/guess an open one if necessary.
#
vt=""
for arg in $*
do
if echo "$arg" | grep '^vt' > /dev/null; then
vt=$arg
break
fi
done
if [ "X$vt" = "X" ]; then
if [ "X$user" = "Xroot" ]; then
# root can user fuser(1) to see if it is in use:
if type fuser >/dev/null 2>&1; then
# try /dev/tty17 thru /dev/tty32
n=17
while [ $n -le 32 ]
do
dev="/dev/tty$n"
if fuser $dev >/dev/null 2>&1; then
:
else
vt="vt$n"
warn "$program: auto-selected VT $vt => $dev"
break
fi
n=`expr $n + 1`
done
fi
fi
if [ "X$vt" = "X" ]; then
# take a wild guess...
vt=vt16
warn "$program: selected fallback VT $vt"
fi
else
vt=""
fi
# Decide flavor of Xserver:
#
stype=`basename "$xserver"`
if echo "$stype" | grep -i xfree86 > /dev/null; then
stype=xfree86
else
stype=xorg
fi
tweak_config() {
in="$1"
config2="$XDUMMY_TMPDIR/xdummy_modified_xconfig.conf"
if [ "X$disp" != "X" ]; then
d=`echo "$disp" | sed -e 's,/,,g' -e 's/:/_/g'`
config2="$config2$d"
fi
# perl script to tweak the config file... add/delete options, etc.
#
env XDUMMY_GEOM=$geom \
XDUMMY_DEPTH=$depth \
XDUMMY_NOMODELINES=$nomodelines \
perl > $config2 < $in -e '
$n = 0;
$geom = $ENV{XDUMMY_GEOM};
$depth = $ENV{XDUMMY_DEPTH};
$nomodelines = $ENV{XDUMMY_NOMODELINES};
$mode_str = "";
$videoram = "24000";
$HorizSync = "30.0 - 130.0";
$VertRefresh = "50.0 - 250.0";
if ($geom ne "") {
my $tmp = "";
foreach $g (split(/,/, $geom)) {
$tmp .= "\"$g\" ";
if (!$nomodelines && $g =~ /(\d+)x(\d+)/) {
my $w = $1;
my $h = $2;
$mode_str .= " Modeline \"$g\" ";
my $dot = sprintf("%.2f", $w * $h * 70 * 1.e-6);
$mode_str .= $dot;
$mode_str .= " " . $w;
$mode_str .= " " . int(1.02 * $w);
$mode_str .= " " . int(1.10 * $w);
$mode_str .= " " . int(1.20 * $w);
$mode_str .= " " . $h;
$mode_str .= " " . int($h + 1);
$mode_str .= " " . int($h + 3);
$mode_str .= " " . int($h + 20);
$mode_str .= "\n";
}
}
$tmp =~ s/\s*$//;
$geom = $tmp;
}
while (<>) {
if ($ENV{XDUMMY_NOTWEAK}) {
print $_;
next;
}
$n++;
if (/^\s*#/) {
# pass comments straight thru
print;
next;
}
if (/^\s*Section\s+(\S+)/i) {
# start of Section
$sect = $1;
$sect =~ s/\W//g;
$sect =~ y/A-Z/a-z/;
$sects{$sect} = 1;
print;
next;
}
if (/^\s*EndSection/i) {
# end of Section
if ($sect eq "serverflags") {
if (!$got_DontVTSwitch) {
print " ##Xdummy:##\n";
print " Option \"DontVTSwitch\" \"true\"\n";
}
if (!$got_AllowMouseOpenFail) {
print " ##Xdummy:##\n";
print " Option \"AllowMouseOpenFail\" \"true\"\n";
}
if (!$got_PciForceNone) {
print " ##Xdummy:##\n";
print " Option \"PciForceNone\" \"true\"\n";
}
} elsif ($sect eq "device") {
if (!$got_Driver) {
print " ##Xdummy:##\n";
print " Driver \"dummy\"\n";
}
if (!$got_VideoRam) {
print " ##Xdummy:##\n";
print " VideoRam $videoram\n";
}
} elsif ($sect eq "screen") {
if ($depth ne "" && !got_DefaultDepth) {
print " ##Xdummy:##\n";
print " DefaultDepth $depth\n";
}
if ($got_Monitor eq "") {
print " ##Xdummy:##\n";
print " Monitor \"Monitor0\"\n";
}
} elsif ($sect eq "monitor") {
if (!got_HorizSync) {
print " ##Xdummy:##\n";
print " HorizSync $HorizSync\n";
}
if (!got_VertRefresh) {
print " ##Xdummy:##\n";
print " VertRefresh $VertRefresh\n";
}
if (!$nomodelines) {
print " ##Xdummy:##\n";
print $mode_str;
}
}
$sect = "";
print;
next;
}
if (/^\s*SubSection\s+(\S+)/i) {
# start of Section
$subsect = $1;
$subsect =~ s/\W//g;
$subsect =~ y/A-Z/a-z/;
$subsects{$subsect} = 1;
if ($sect eq "screen" && $subsect eq "display") {
$got_Modes = 0;
}
print;
next;
}
if (/^\s*EndSubSection/i) {
# end of SubSection
if ($sect eq "screen") {
if ($subsect eq "display") {
if ($depth ne "" && !$set_Depth) {
print " ##Xdummy:##\n";
print " Depth\t$depth\n";
}
if ($geom ne "" && ! $got_Modes) {
print " ##Xdummy:##\n";
print " Modes\t$geom\n";
}
}
}
$subsect = "";
print;
next;
}
$l = $_;
$l =~ s/#.*$//;
if ($sect eq "serverflags") {
if ($l =~ /^\s*Option.*DontVTSwitch/i) {
$_ =~ s/false/true/ig;
$got_DontVTSwitch = 1;
}
if ($l =~ /^\s*Option.*AllowMouseOpenFail/i) {
$_ =~ s/false/true/ig;
$got_AllowMouseOpenFail = 1;
}
if ($l =~ /^\s*Option.*PciForceNone/i) {
$_ =~ s/false/true/ig;
$got_PciForceNone= 1;
}
}
if ($sect eq "module") {
if ($l =~ /^\s*Load.*\b(dri|fbdevhw)\b/i) {
$_ = "##Xdummy## $_";
}
}
if ($sect eq "monitor") {
if ($l =~ /^\s*HorizSync/i) {
$got_HorizSync = 1;
}
if ($l =~ /^\s*VertRefresh/i) {
$got_VertRefresh = 1;
}
}
if ($sect eq "device") {
if ($l =~ /^(\s*Driver)\b/i) {
$_ = "$1 \"dummy\"\n";
$got_Driver = 1;
}
if ($l =~ /^\s*VideoRam/i) {
$got_VideoRam= 1;
}
}
if ($sect eq "inputdevice") {
if ($l =~ /^\s*Option.*\bDevice\b/i) {
print " ##Xdummy:##\n";
$_ = " Option \"Device\" \"/dev/dilbert$n\"\n";
}
}
if ($sect eq "screen") {
if ($l =~ /^\s*DefaultDepth\s+(\d+)/i) {
if ($depth ne "") {
print " ##Xdummy:##\n";
$_ = " DefaultDepth\t$depth\n";
}
$got_DefaultDepth = 1;
}
if ($l =~ /^\s*Monitor\s+(\S+)/i) {
$got_Monitor = $1;
$got_Monitor =~ s/"//g;
}
if ($subsect eq "display") {
if ($geom ne "") {
if ($l =~ /^(\s*Modes)\b/i) {
print " ##Xdummy:##\n";
$_ = "$1 $geom\n";
$got_Modes = 1;
}
}
if ($l =~ /^\s*Depth\s+(\d+)/i) {
my $d = $1;
if (!$set_Depth && $depth ne "") {
$set_Depth = 1;
if ($depth != $d) {
print " ##Xdummy:##\n";
$_ = " Depth\t$depth\n";
}
}
}
}
}
print;
}
if ($ENV{XDUMMY_NOTWEAK}) {
exit;
}
# create any crucial sections that are missing:
if (! exists($sects{serverflags})) {
print "\n##Xdummy:##\n";
print "Section \"ServerFlags\"\n";
print " Option \"DontVTSwitch\" \"true\"\n";
print " Option \"AllowMouseOpenFail\" \"true\"\n";
print " Option \"PciForceNone\" \"true\"\n";
print "EndSection\n";
}
if (! exists($sects{device})) {
print "\n##Xdummy:##\n";
print "Section \"Device\"\n";
print " Identifier \"Videocard0\"\n";
print " Driver \"dummy\"\n";
print " VideoRam $videoram\n";
print "EndSection\n";
}
if (! exists($sects{monitor})) {
print "\n##Xdummy:##\n";
print "Section \"Monitor\"\n";
print " Identifier \"Monitor0\"\n";
print " HorizSync $HorizSync\n";
print " VertRefresh $VertRefresh\n";
print "EndSection\n";
}
if (! exists($sects{screen})) {
print "\n##Xdummy:##\n";
print "Section \"Screen\"\n";
print " Identifier \"Screen0\"\n";
print " Device \"Videocard0\"\n";
if ($got_Monitor ne "") {
print " Monitor \"$got_Monitor\"\n";
} else {
print " Monitor \"Monitor0\"\n";
}
if ($depth ne "") {
print " DefaultDepth $depth\n";
} else {
print " DefaultDepth 24\n";
}
print " SubSection \"Display\"\n";
print " Viewport 0 0\n";
print " Depth 24\n";
if ($got_Modes) {
;
} elsif ($geom ne "") {
print " Modes $geom\n";
} else {
print " Modes \"1280x1024\" \"1024x768\" \"800x600\"\n";
}
print " EndSubSection\n";
print "EndSection\n";
}
';
}
# Work out config file and tweak it.
#
if [ "X$cmdline_config" = "X" ]; then
:
elif [ "X$cmdline_config" = "Xxdummy-builtin" ]; then
:
elif echo "$cmdline_config" | grep '/' > /dev/null; then
:
else
# ignore basename only case (let server handle it)
cmdline_config=""
notweak=1
fi
config=$cmdline_config
if [ "X$notweak" = "X1" -a "X$root" = "X" -a -f "$cmdline_config" ]; then
# if not root we need to copy (but not tweak) the specified config.
XDUMMY_NOTWEAK=1
export XDUMMY_NOTWEAK
notweak=""
fi
if [ ! $notweak ]; then
# tweaked config will be put in $config2:
config2=""
if [ "X$config" = "X" ]; then
# use the default one:
if [ "X$stype" = "Xxorg" ]; then
config=/etc/X11/xorg.conf
else
if [ -f "/etc/X11/XF86Config-4" ]; then
config="/etc/X11/XF86Config-4"
else
config="/etc/X11/XF86Config"
fi
fi
if [ ! -f "$config" ]; then
for c in /etc/X11/xorg.conf /etc/X11/XF86Config-4 /etc/X11/XF86Config
do
if [ -f $c ]; then
config=$c
break
fi
done
fi
fi
if [ "X$config" = "Xxdummy-builtin" ]; then
config=""
fi
if [ ! -f "$config" ]; then
config="$XDUMMY_TMPDIR/xorg.conf"
warn "$program: using minimal built-in xorg.conf settings."
cat > $config <<END
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection
Section "Files"
EndSection
Section "Module"
Load "dbe"
Load "extmod"
Load "freetype"
Load "glx"
EndSection
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 30.0 - 130.0
VertRefresh 50.0 - 250.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "foovideo"
VendorName "foovideo Corporation"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x1024"
EndSubSection
EndSection
END
fi
if [ -f "$config" ]; then
tweak_config $config
fi
# now we need to get our tweaked config file onto the command line:
if [ "X$cmdline_config" = "X" ]; then
# append to cmdline (FUBAR will be substituted below.)
if [ "X$stype" = "Xxorg" ]; then
args="$args -config FUBAR"
else
args="$args -xf86config FUBAR"
fi
fi
if [ "X$config2" != "X" ]; then
# or modify $args:
c2=$config2
if [ "X$root" = "X" ]; then
# ordinary user cannot use absolute path.
c2=`basename $config2`
fi
args=`echo "$args" | sed \
-e "s,-config *[^ ][^ ]*,-config $c2,g" \
-e "s,-xf86config *[^ ][^ ]*,-xf86config $c2,g"`
fi
fi
if [ $prconf ]; then
warn ""
warn "Printing out the Xorg/XFree86 server config file:"
warn ""
if [ "X$config2" = "X" ]; then
warn "NO CONFIG GENERATED."
exit 1
else
cat "$config2"
fi
exit 0
fi
if [ $debug ]; then
XDUMMY_DEBUG=1
export XDUMMY_DEBUG
fi
if [ $root ]; then
XDUMMY_ROOT=1
export XDUMMY_ROOT
fi
# Finally, run it:
#
if [ "X$debug" != "X" -o "X$runit" = "X" ]; then
if [ ! $runit ]; then
echo ""
echo "/usr/bin/env:"
env | egrep -v '^(LS_COLORS|TERMCAP)' | sort
echo ""
echo "XDUMMY*:"
env | grep '^XDUMMY' | sort
echo ""
fi
warn ""
warn "The command to run is:"
warn ""
so=$SO
pwd=`pwd`
if echo "$so" | grep '^\./' > /dev/null; then
so=`echo "$so" | sed -e "s,^\.,$pwd,"`
fi
if echo "$so" | grep '/' > /dev/null; then
:
else
so="$pwd/$so"
fi
warn "env LD_PRELOAD=$so $xserver $disp $args $vt"
warn ""
if [ ! $runit ]; then
exit 0
fi
fi
if [ $strace ]; then
if [ "X$strace" = "X2" ]; then
ltrace -f env LD_PRELOAD=$SO $xserver $disp $args $vt
else
strace -f env LD_PRELOAD=$SO $xserver $disp $args $vt
fi
else
exec env LD_PRELOAD=$SO $xserver $disp $args $vt
fi
exit $?
#########################################################################
code() {
#code_begin
#include <stdio.h>
#define O_ACCMODE 0003
#define O_RDONLY 00
#define O_WRONLY 01
#define O_RDWR 02
#define O_CREAT 0100 /* not fcntl */
#define O_EXCL 0200 /* not fcntl */
#define O_NOCTTY 0400 /* not fcntl */
#define O_TRUNC 01000 /* not fcntl */
#define O_APPEND 02000
#define O_NONBLOCK 04000
#define O_NDELAY O_NONBLOCK
#define O_SYNC 010000
#define O_FSYNC O_SYNC
#define O_ASYNC 020000
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <linux/vt.h>
#include <linux/kd.h>
#define __USE_GNU
#include <dlfcn.h>
static char tmpdir[4096];
static char str1[4096];
static char str2[4096];
static char devs[256][1024];
static int debug = -1;
static int root = -1;
static int changed_uid = 0;
static int saw_fonts = 0;
static int saw_lib_modules = 0;
static time_t start = 0;
void check_debug(void) {
if (debug < 0) {
if (getenv("XDUMMY_DEBUG") != NULL) {
debug = 1;
} else {
debug = 0;
}
/* prevent other processes using the preload: */
putenv("LD_PRELOAD=");
}
}
void check_root(void) {
if (root < 0) {
/* script tells us if we are root */
if (getenv("XDUMMY_ROOT") != NULL) {
root = 1;
} else {
root = 0;
}
}
}
void check_uid(void) {
if (start == 0) {
start = time(NULL);
if (debug) fprintf(stderr, "START: %u\n", (unsigned int) start);
return;
} else if (changed_uid == 0) {
if (saw_fonts || time(NULL) > start + 20) {
if (getenv("XDUMMY_UID")) {
int uid = atoi(getenv("XDUMMY_UID"));
if (debug) fprintf(stderr, "SETREUID: %d saw_fonts=%d\n", uid, saw_fonts);
if (uid >= 0) {
/* this will simply fail in -nonroot mode: */
setreuid(uid, -1);
}
}
changed_uid = 1;
}
}
}
#define CHECKIT if (debug < 0) check_debug(); \
if (root < 0) check_root(); \
check_uid();
static void set_tmpdir(void) {
char *s;
static int didset = 0;
if (didset) {
return;
}
s = getenv("XDUMMY_TMPDIR");
if (! s) {
s = "/tmp";
}
tmpdir[0] = '\0';
strcat(tmpdir, s);
strcat(tmpdir, "/");
didset = 1;
}
static char *tmpdir_path(const char *path) {
char *str;
set_tmpdir();
strcpy(str2, path);
str = str2;
while (*str) {
if (*str == '/') {
*str = '_';
}
str++;
}
strcpy(str1, tmpdir);
strcat(str1, str2);
return str1;
}
int open(const char *pathname, int flags, unsigned short mode) {
int fd;
char *store_dev = NULL;
static int (*real_open)(const char *, int , unsigned short) = NULL;
CHECKIT
if (! real_open) {
real_open = (int (*)(const char *, int , unsigned short))
dlsym(RTLD_NEXT, "open");
}
if (strstr(pathname, "lib/modules/")) {
/* not currently used. */
saw_lib_modules = 1;
}
if (!root) {
if (strstr(pathname, "/dev/") == pathname) {
store_dev = strdup(pathname);
}
if (strstr(pathname, "/dev/tty") == pathname && strcmp(pathname, "/dev/tty")) {
pathname = tmpdir_path(pathname);
if (debug) fprintf(stderr, "OPEN: %s -> %s (as FIFO)\n", store_dev, pathname);
/* we make it a FIFO so ioctl on it does not fail */
unlink(pathname);
mkfifo(pathname, 0666);
} else if (0) {
/* we used to handle more /dev files ... */
fd = real_open(pathname, O_WRONLY|O_CREAT, 0777);
close(fd);
}
}
fd = real_open(pathname, flags, mode);
if (debug) fprintf(stderr, "OPEN: %s %d %d fd=%d\n", pathname, flags, mode, fd);
if (! root) {
if (store_dev) {
if (fd < 256) {
strcpy(devs[fd], store_dev);
}
free(store_dev);
}
}
return(fd);
}
int open64(const char *pathname, int flags, unsigned short mode) {
int fd;
CHECKIT
if (debug) fprintf(stderr, "OPEN64: %s %d %d\n", pathname, flags, mode);
fd = open(pathname, flags, mode);
return(fd);
}
int rename(const char *oldpath, const char *newpath) {
static int (*real_rename)(const char *, const char *) = NULL;
CHECKIT
if (! real_rename) {
real_rename = (int (*)(const char *, const char *))
dlsym(RTLD_NEXT, "rename");
}
if (debug) fprintf(stderr, "RENAME: %s %s\n", oldpath, newpath);
if (root) {
return(real_rename(oldpath, newpath));
}
if (strstr(oldpath, "/var/log") == oldpath) {
if (debug) fprintf(stderr, "RENAME: returning 0\n");
return 0;
}
return(real_rename(oldpath, newpath));
}
FILE *fopen(const char *pathname, const char *mode) {
static FILE* (*real_fopen)(const char *, const char *) = NULL;
char *str;
if (! saw_fonts) {
if (strstr(pathname, "/fonts/")) {
if (strstr(pathname, "fonts.dir")) {
saw_fonts = 1;
} else if (strstr(pathname, "fonts.alias")) {
saw_fonts = 1;
}
}
}
CHECKIT
if (! real_fopen) {
real_fopen = (FILE* (*)(const char *, const char *))
dlsym(RTLD_NEXT, "fopen");
}
if (debug) fprintf(stderr, "FOPEN: %s %s\n", pathname, mode);
if (strstr(pathname, "xdummy_modified_xconfig.conf")) {
/* make our config appear to be in /etc/X11, etc. */
char *q = strrchr(pathname, '/');
if (q != NULL && getenv("XDUMMY_TMPDIR") != NULL) {
strcpy(str1, getenv("XDUMMY_TMPDIR"));
strcat(str1, q);
if (debug) fprintf(stderr, "FOPEN: %s -> %s\n", pathname, str1);
pathname = str1;
}
}
if (root) {
return(real_fopen(pathname, mode));
}
str = (char *) pathname;
if (strstr(pathname, "/var/log") == pathname) {
str = tmpdir_path(pathname);
if (debug) fprintf(stderr, "FOPEN: %s -> %s\n", pathname, str);
}
return(real_fopen(str, mode));
}
#define RETURN0 if (debug) \
{fprintf(stderr, "IOCTL: covered %d 0x%x\n", fd, req);} return 0;
#define RETURN1 if (debug) \
{fprintf(stderr, "IOCTL: covered %d 0x%x\n", fd, req);} return -1;
int ioctl(int fd, int req, void *ptr) {
static int closed_xf86Info_consoleFd = 0;
static int (*real_ioctl)(int, int , void *) = NULL;
CHECKIT
if (! real_ioctl) {
real_ioctl = (int (*)(int, int , void *))
dlsym(RTLD_NEXT, "open");
}
if (debug) fprintf(stderr, "IOCTL: %d 0x%x %p\n", fd, req, ptr);
/* based on xorg-x11-6.8.1-dualhead.patch */
if (req == VT_GETMODE) {
/* close(xf86Info.consoleFd) */
if (0 && ! closed_xf86Info_consoleFd) {
/* I think better not to close it... */
close(fd);
closed_xf86Info_consoleFd = 1;
}
RETURN0
} else if (req == VT_SETMODE) {
RETURN0
} else if (req == VT_GETSTATE) {
RETURN0
} else if (req == KDSETMODE) {
RETURN0
} else if (req == KDSETLED) {
RETURN0
} else if (req == KDGKBMODE) {
RETURN0
} else if (req == KDSKBMODE) {
RETURN0
} else if (req == VT_ACTIVATE) {
RETURN0
} else if (req == VT_WAITACTIVE) {
RETURN0
} else if (req == VT_RELDISP) {
if (ptr == (void *) 1) {
RETURN1
} else if (ptr == (void *) VT_ACKACQ) {
RETURN0
}
}
return(real_ioctl(fd, req, ptr));
}
typedef void (*sighandler_t)(int);
#define SIGUSR1 10
#define SIG_DFL ((sighandler_t)0)
sighandler_t signal(int signum, sighandler_t handler) {
static sighandler_t (*real_signal)(int, sighandler_t) = NULL;
CHECKIT
if (! real_signal) {
real_signal = (sighandler_t (*)(int, sighandler_t))
dlsym(RTLD_NEXT, "signal");
}
if (debug) fprintf(stderr, "SIGNAL: %d %p\n", signum, handler);
if (signum == SIGUSR1) {
if (debug) fprintf(stderr, "SIGNAL: skip SIGUSR1\n");
return SIG_DFL;
}
return(real_signal(signum, handler));
}
int close(int fd) {
static int (*real_close)(int) = NULL;
CHECKIT
if (! real_close) {
real_close = (int (*)(int)) dlsym(RTLD_NEXT, "close");
}
if (debug) fprintf(stderr, "CLOSE: %d\n", fd);
if (!root) {
if (fd < 256) {
devs[fd][0] = '\0';
}
}
return(real_close(fd));
}
struct stat {
int foo;
};
int stat(const char *path, struct stat *buf) {
static int (*real_stat)(const char *, struct stat *) = NULL;
CHECKIT
if (! real_stat) {
real_stat = (int (*)(const char *, struct stat *))
dlsym(RTLD_NEXT, "stat");
}
if (debug) fprintf(stderr, "STAT: %s\n", path);
return(real_stat(path, buf));
}
int stat64(const char *path, struct stat *buf) {
static int (*real_stat64)(const char *, struct stat *) = NULL;
CHECKIT
if (! real_stat64) {
real_stat64 = (int (*)(const char *, struct stat *))
dlsym(RTLD_NEXT, "stat64");
}
if (debug) fprintf(stderr, "STAT64: %s\n", path);
return(real_stat64(path, buf));
}
int chown(const char *path, uid_t owner, gid_t group) {
static int (*real_chown)(const char *, uid_t, gid_t) = NULL;
CHECKIT
if (! real_chown) {
real_chown = (int (*)(const char *, uid_t, gid_t))
dlsym(RTLD_NEXT, "chown");
}
if (root) {
return(real_chown(path, owner, group));
}
if (debug) fprintf(stderr, "CHOWN: %s %d %d\n", path, owner, group);
if (strstr(path, "/dev") == path) {
if (debug) fprintf(stderr, "CHOWN: return 0\n");
return 0;
}
return(real_chown(path, owner, group));
}
extern int *__errno_location (void);
#ifndef ENODEV
#define ENODEV 19
#endif
int ioperm(unsigned long from, unsigned long num, int turn_on) {
static int (*real_ioperm)(unsigned long, unsigned long, int) = NULL;
CHECKIT
if (! real_ioperm) {
real_ioperm = (int (*)(unsigned long, unsigned long, int))
dlsym(RTLD_NEXT, "ioperm");
}
if (debug) fprintf(stderr, "IOPERM: %d %d %d\n", (int) from, (int) num, turn_on);
if (root) {
return(real_ioperm(from, num, turn_on));
}
if (from == 0 && num == 1024 && turn_on == 1) {
/* we want xf86EnableIO to fail */
if (debug) fprintf(stderr, "IOPERM: setting ENODEV.\n");
*__errno_location() = ENODEV;
return -1;
}
return 0;
}
int iopl(int level) {
static int (*real_iopl)(int) = NULL;
CHECKIT
if (! real_iopl) {
real_iopl = (int (*)(int)) dlsym(RTLD_NEXT, "iopl");
}
if (debug) fprintf(stderr, "IOPL: %d\n", level);
if (root) {
return(real_iopl(level));
}
return 0;
}
#ifdef INTERPOSE_GETUID
/*
* we got things to work w/o pretending to be root.
* so we no longer interpose getuid(), etc.
*/
uid_t getuid(void) {
static uid_t (*real_getuid)(void) = NULL;
CHECKIT
if (! real_getuid) {
real_getuid = (uid_t (*)(void)) dlsym(RTLD_NEXT, "getuid");
}
if (root) {
return(real_getuid());
}
if (debug) fprintf(stderr, "GETUID: 0\n");
return 0;
}
uid_t geteuid(void) {
static uid_t (*real_geteuid)(void) = NULL;
CHECKIT
if (! real_geteuid) {
real_geteuid = (uid_t (*)(void)) dlsym(RTLD_NEXT, "geteuid");
}
if (root) {
return(real_geteuid());
}
if (debug) fprintf(stderr, "GETEUID: 0\n");
return 0;
}
uid_t geteuid_kludge1(void) {
static uid_t (*real_geteuid)(void) = NULL;
CHECKIT
if (! real_geteuid) {
real_geteuid = (uid_t (*)(void)) dlsym(RTLD_NEXT, "geteuid");
}
if (debug) fprintf(stderr, "GETEUID: 0 saw_libmodules=%d\n", saw_lib_modules);
if (root && !saw_lib_modules) {
return(real_geteuid());
} else {
saw_lib_modules = 0;
return 0;
}
}
uid_t getuid32(void) {
static uid_t (*real_getuid32)(void) = NULL;
CHECKIT
if (! real_getuid32) {
real_getuid32 = (uid_t (*)(void)) dlsym(RTLD_NEXT, "getuid32");
}
if (root) {
return(real_getuid32());
}
if (debug) fprintf(stderr, "GETUID32: 0\n");
return 0;
}
uid_t geteuid32(void) {
static uid_t (*real_geteuid32)(void) = NULL;
CHECKIT
if (! real_geteuid32) {
real_geteuid32 = (uid_t (*)(void)) dlsym(RTLD_NEXT, "geteuid32");
}
if (root) {
return(real_geteuid32());
}
if (debug) fprintf(stderr, "GETEUID32: 0\n");
return 0;
}
gid_t getgid(void) {
static gid_t (*real_getgid)(void) = NULL;
CHECKIT
if (! real_getgid) {
real_getgid = (gid_t (*)(void)) dlsym(RTLD_NEXT, "getgid");
}
if (root) {
return(real_getgid());
}
if (debug) fprintf(stderr, "GETGID: 0\n");
return 0;
}
gid_t getegid(void) {
static gid_t (*real_getegid)(void) = NULL;
CHECKIT
if (! real_getegid) {
real_getegid = (gid_t (*)(void)) dlsym(RTLD_NEXT, "getegid");
}
if (root) {
return(real_getegid());
}
if (debug) fprintf(stderr, "GETEGID: 0\n");
return 0;
}
gid_t getgid32(void) {
static gid_t (*real_getgid32)(void) = NULL;
CHECKIT
if (! real_getgid32) {
real_getgid32 = (gid_t (*)(void)) dlsym(RTLD_NEXT, "getgid32");
}
if (root) {
return(real_getgid32());
}
if (debug) fprintf(stderr, "GETGID32: 0\n");
return 0;
}
gid_t getegid32(void) {
static gid_t (*real_getegid32)(void) = NULL;
CHECKIT
if (! real_getegid32) {
real_getegid32 = (gid_t (*)(void)) dlsym(RTLD_NEXT, "getegid32");
}
if (root) {
return(real_getegid32());
}
if (debug) fprintf(stderr, "GETEGID32: 0\n");
return 0;
}
#endif
#if 0
/* maybe we need to interpose on strcmp someday... here is the template */
int strcmp(const char *s1, const char *s2) {
static int (*real_strcmp)(const char *, const char *) = NULL;
CHECKIT
if (! real_strcmp) {
real_strcmp = (int (*)(const char *, const char *)) dlsym(RTLD_NEXT, "strcmp");
}
if (debug) fprintf(stderr, "STRCMP: '%s' '%s'\n", s1, s2);
return(real_strcmp(s1, s2));
}
#endif
#code_end
}