summaryrefslogtreecommitdiffstats
path: root/x11vnc/misc
diff options
context:
space:
mode:
Diffstat (limited to 'x11vnc/misc')
-rwxr-xr-xx11vnc/misc/Xdummy1207
1 files changed, 1207 insertions, 0 deletions
diff --git a/x11vnc/misc/Xdummy b/x11vnc/misc/Xdummy
new file mode 100755
index 0000000..bf5bdbb
--- /dev/null
+++ b/x11vnc/misc/Xdummy
@@ -0,0 +1,1207 @@
+#!/bin/sh
+#
+# Xdummy: an LD_PRELOAD hack to run a stock XFree86(1) or Xorg(1) server
+# with the "dummy" video driver to make it avoid Linux VT switching, etc.
+#
+# Run "Xdummy -help" for more info.
+#
+xserver=""
+geom=""
+install=""
+uninstall=""
+root=1
+debug=""
+strace=""
+runit=1
+prconf=""
+noconf=""
+
+PATH=$PATH:/bin:/usr/bin
+export PATH
+
+program=`basename "$0"`
+
+help () {
+ cat << END
+
+$program: a hack to run a stock XFree86(1) or Xorg(1) server with the
+"dummy" video driver such that it AVOIDS the Linux VT switching, keyboard
+mouse conflicts, etc associated with normal use of "dummy".
+
+In other words, try to make XFree86/Xorg with the Device "dummy" driver
+act more like Xvfb(1).
+
+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 (i.e. avoid the VT stuff). LD_PRELOAD tricks
+are usually "clever hacks" and so might not work in all circumstances.
+
+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).
+
+Currently this program needs to be run as root, since it is too difficult
+to trick it otherwise. Hopefully this will be relaxed at a later date
+if the needed tricks are discovered.
+
+Also, gcc/cc is required to compile the LD_PRELOAD shared object.
+See -install and -uninstall described below.
+
+
+Usage:
+
+ $program <${program}-args> [--] <Xserver-args>
+
+
+Examples:
+
+ $program :1
+
+ $program -debug -tmpdir ~/mytmp :1
+
+ $program -install
+
+startx example:
+
+ startx -e bash -- $program :2 -depth 16
+
+ (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
+
+gdm/kdm example:
+
+ TBD.
+
+
+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).
+
+ -uninstall Remove the file: $0.so
+ The LD_PRELOAD shared object will then be compiled
+ each time this program is run.
+
+ Note: the X server is not started under -install or -uninstall.
+
+
+ :N The DISPLAY can be the first $program argument.
+ It is passed to the real X server. This is to
+ aid use with startx(1), xinit(1), xdm(1), etc.
+
+ -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 smaller geometry
+ than the one in the system config file.
+
+ -tmpdir dir Specify a temporary directory, owned by you and
+ only writable by you. This is used in place of
+ /tmp/Xdummy.\$USER/ to placed the $program.so
+ shared object, tweaked config files, etc.
+
+ -nonroot Try to run in non-root mode (XXX NOT yet working).
+
+ -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, use these locations:
+ /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.
+
+ -prconf Print, to stdout, the tweaked Xorg or XFree86
+ config file (-config and -xf86config server
+ options, respectively). The Xserver is not
+ started.
+
+ -noconf Do not tweak the Xorg or XFree86 config file
+ (system or server command line) at all. 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 -prconf output.
+
+ -debug Extra debugging output.
+
+ -strace strace(1) the Xserver process (for debugging).
+
+ -h, -help Print out this help.
+
+
+ Xserver-args:
+
+ Most of the XFree86 and Xorg options will work. 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 is used.
+ Any settings in the config file that are not consistent with
+ "dummy" mode will be overwritten (unless -noconf is used).
+
+Notes:
+
+ The XFree86/Xorg "dummy" driver is currently undocmented. It works
+ well in this mode, but it is evidently not intended for end users.
+
+ If the display Xserver-arg (e.g. :1) is not given, or ":" or ":9999"
+ is given that indicates $program should try to find a free one.
+
+ If the display virtual terminal, VT, (e.g. vt9) is not given that
+ indicates $program should try to find a free one (or guess a high one).
+
+ This program is not completely secure WRT files in /tmp (but it
+ tries to some degree). Better is to use the -tmpdir option to supply a
+ directory only writable by you. Even better is to get rid of users on
+ the local machine you do not trust :-)
+
+END
+}
+
+warn() {
+ echo "$*" 1>&2
+}
+
+#warn "id: `id -u`"
+# See if it needs to be run as root:
+if [ "X$XDUMMY_SU_EXEC" = "X" -a "X`id -u`" != "X0" ]; then
+ dosu=1
+ XDUMMY_SU_EXEC=1
+ export XDUMMY_SU_EXEC
+ for arg in $*
+ do
+ if [ "X$arg" = "X-nonroot" ]; then
+ dosu=""
+ 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=""
+ elif [ "X$arg" = "X--" ]; then
+ break
+ fi
+ done
+ if [ $dosu ]; then
+ warn "$program: currently needs to be run as root to work."
+ warn "$program: supply the root password to restart as root:"
+ exec su -c "$0 $*"
+ exit
+ fi
+fi
+
+#warn "args: $*"
+disp=""
+# Process Xdummy args:
+while [ "X$1" != "X" ]
+do
+ case $1 in
+ ":"*) disp=$1
+ ;;
+ "-install") install=1
+ ;;
+ "-uninstall") uninstall=1
+ ;;
+ "-nonroot") root=""
+ ;;
+ "-xserver") xserver="$2"; shift
+ ;;
+ "-geom"*) geom="$2"; shift
+ ;;
+ "-tmpdir") XDUMMY_TMPDIR="$2"; shift
+ ;;
+ "-n") runit=""
+ ;;
+ "-no") runit=""
+ ;;
+ "-prconf") prconf=1
+ ;;
+ "-noconf") noconf=1
+ ;;
+ "-debug") debug=1
+ ;;
+ "-nodebug") debug=""
+ ;;
+ "-strace") strace=1
+ ;;
+ "-h"*) help; exit 0
+ ;;
+ "--") shift; break
+ ;;
+ *) break
+ ;;
+ esac
+ shift
+done
+
+# Try to get a username for use in our tmp directory, etc.
+user=""
+if [ X`id -u` = "X0" ]; then
+ user=root # this will also be used below for id=0
+elif [ "X$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$$"
+fi
+
+# Function to compile the LD_PRELOAD shared object:
+make_so() {
+
+ # extract code embedded in this script into a tmp C file:
+ n1=`grep -n '^#code_begin' $0 | head -1 | awk -F: '{print $1}'`
+ n2=`grep -n '^#code_end' $0 | head -1 | awk -F: '{print $1}'`
+ n1=`expr $n1 + 1`
+ dn=`expr $n2 - $n1`
+
+ tmp=$tdir/Xdummy.$$.c
+ rm -f $tmp
+ if [ -e $tmp -o -h $tmp ]; then
+ warn "$tmp still exists."
+ exit 1
+ fi
+ tail +$n1 $0 | head -$dn > $tmp
+
+ # compile it to Xdummy.so:
+ rm -f $SO
+ touch $SO
+ if [ ! -f $SO ]; then
+ SO=$tdir/Xdummy.$user.so
+ warn "warning switch LD_PRELOAD shared object to: $SO"
+ fi
+ rm -f $SO
+
+ # we assume gcc:
+ cc -shared -fPIC -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 "removing $SO"
+ fi
+ rm -f $SO
+ if [ -e $SO -o -h $SO ]; then
+ # not good...
+ warn "warning: $SO still exists."
+ exit 1
+ fi
+ if [ $install ]; then
+ make_so
+ if [ ! -f $SO ]; then
+ exit 1
+ fi
+ fi
+ exit 0
+fi
+
+# We need a tmp directory for the .so, tweaked config file, and for
+# redirecting filenames we cannot create (under -nonroot, not yet
+# working).
+#
+if [ "X$XDUMMY_TMPDIR" = "X" ]; then
+ XDUMMY_TMPDIR="/tmp/Xdummy.$user"
+fi
+tmp=$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 $XDUMMY_TMPDIR
+
+# see if we can write something there:
+tfile="$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:
+if [ ! -f $SO ]; then
+ SO="$XDUMMY_TMPDIR/Xdummy.so"
+ make_so
+fi
+
+# decide which X server to use:
+if [ "X$xserver" = "X" ]; then
+ if type Xorg >/dev/null 2>&1; then
+ xserver="Xorg"
+ elif type XFree86 >/dev/null 2>&1; then
+ xserver="XFree86"
+ elif -x /usr/X11R6/bin/Xorg; then
+ xserver="/usr/X11R6/bin/Xorg"
+ elif -x /usr/X11R6/bin/XFree86; then
+ xserver="/usr/X11R6/bin/XFree86"
+ fi
+ if [ "X$xserver" = "X" ]; then
+ # just let it fail below.
+ xserver="/usr/X11R6/bin/Xorg"
+ warn "$program: cannot locate a stock Xserver... assuming $xserver"
+ fi
+fi
+
+# see if the binary is suid or not readable under -nonroot (XXX not yet useful):
+xserver_path=`type -p $xserver 2>/dev/null`
+if [ -e "$xserver_path" -a "X$root" = "X" -a "X$runit" != "X" ]; then
+ if [ ! -r $xserver_path -o -u $xserver_path ]; then
+ # XXX not quite correct with rm -rf $XDUMMY_TMPDIR ...
+ base=`basename "$xserver_path"`
+ new="$tdir/$base.$user"
+ if [ ! -e $new ]; then
+ warn "need to copy $xserver_path to $new as root:"
+ ls -l $xserver_path 1>&2
+ warn "please supply root passwd to 'su -c'"
+ touch $new || exit 1
+ chmod 700 $new || exit 1
+ su -c "cat $xserver_path > $new"
+ elif [ ! -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:
+ 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 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 VT $vt"
+ fi
+else
+ vt=""
+fi
+
+# decide flavor of Xserver:
+stype=`basename "$xserver"`
+if echo "$stype" | grep -i xorg > /dev/null; then
+ stype=xorg
+else
+ stype=xfree86
+fi
+
+# work out config file and tweak it.
+next=""
+config=""
+got_config=""
+for arg in $*
+do
+ if [ $next ]; then
+ config="$arg"
+ got_config=1
+ break
+ fi
+ if [ "X$arg" = "X-xf86config" ]; then
+ stype="xfree86"
+ next=1
+ elif [ "X$arg" = "X-config" ]; then
+ stype="xorg"
+ next=1
+ fi
+done
+
+tweak_config() {
+ in="$1"
+ config2="$XDUMMY_TMPDIR/xconfig"
+ 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.
+ XDUMMY_GEOM=$geom; export XDUMMY_GEOM
+ perl > $config2 < $in -e '
+ $n = 0;
+ $geom = $ENV{XDUMMY_GEOM};
+ if ($geom ne "") {
+ $tmp = "";
+ foreach $g (split(/,/, $geom)) {
+ $tmp .= "\"$g\" ";
+ }
+ $tmp =~ s/\s*$//;
+ $geom = $tmp;
+ }
+ while (<>) {
+ $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/) {
+ # 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 16000\n";
+ }
+ }
+ $sect = "";
+ 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 "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 ($sect eq "screen") {
+ if ($geom ne "") {
+ if ($l =~ /^(\s*Modes)\b/i) {
+ $_ = "$1 $geom\n";
+ print " ##Xdummy:##\n";
+ $got_Modes = 1;
+ }
+ }
+ }
+ print;
+ }
+ # create any crucial sections that are missing:
+ if (! exists($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($sects{device})) {
+ print "\n##Xdummy:##\n";
+ print "Section \"Device\"\n";
+ print " Identifier \"Videocard0\"\n";
+ print " Driver \"dummy\"\n";
+ print " VideoRam 16000\n";
+ print "EndSection\n";
+ }
+ if (! exists($sects{monitor})) {
+ print "\n##Xdummy:##\n";
+ print "Section \"Monitor\"\n";
+ print " Identifier \"Monitor0\"\n";
+ print " HorizSync 30.0 - 130.0\n";
+ print " VertRefresh 50.0 - 250.0\n";
+ print "EndSection\n";
+ }
+ if (! exists($sects{screen})) {
+ print "\n##Xdummy:##\n";
+ print "Section \"Screen\"\n";
+ print " Identifier \"Screen0\"\n";
+ print " Device \"Videocard0\"\n";
+ print " Monitor \"Monitor0\"\n";
+ print " DefaultDepth 16\n";
+ print " SubSection \"Display\"\n";
+ print " Viewport 0 0\n";
+ print " Depth 16\n";
+ print " Modes \"1024x768\" \"800x600\" \"640x480\"\n";
+ print " EndSubSection\n";
+ print "EndSection\n";
+ }
+';
+}
+
+args="$*"
+if [ ! $noconf ]; then
+ # tweaked config will be put in $config2:
+ config2=""
+ if [ "X$config" != "X" ]; then
+ if [ ! -f $config ]; then
+ config="/etc/X11/$config"
+ fi
+ else
+ # 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 [ -f $config ]; then
+ tweak_config $config
+ fi
+
+ # now we need to get our tweaked config file onto the command line:
+ if [ ! $got_config ]; then
+ # append:
+ if [ "X$stype" = "Xxorg" ]; then
+ args="$args -config FUBAR"
+ else
+ args="$args -xf86config FUBAR"
+ fi
+ fi
+ if [ "X$config2" != "X" ]; then
+ # or modify $args:
+ args=`echo "$args" | sed \
+ -e "s,-config *[^ ][^ ]*,-config $config2,g" \
+ -e "s,-xf86config *[^ ][^ ]*,-xf86config $config2,g"`
+ fi
+fi
+
+if [ $prconf ]; then
+ warn ""
+ warn "The Xorg/XFree86 server config file is:"
+ warn ""
+ if [ "X$config2" = "X" ]; then
+ warn "NO CONFIG GENERATED."
+ else
+ cat "$config2"
+ fi
+ exit
+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$runit" = "X" ]; then
+ warn ""
+ warn "The command to run is:"
+ warn ""
+ so=$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 [ $strace ]; then
+ strace -f env LD_PRELOAD=$SO $xserver $disp $args $vt
+else
+ exec env LD_PRELOAD=$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[1024];
+static char str1[1024];
+static char str2[1024];
+
+static char devs[256][1024];
+static int debug = -1;
+static int root = -1;
+
+void check_debug(void) {
+ if (debug < 0) {
+ if (getenv("XDUMMY_DEBUG") != NULL) {
+ debug = 1;
+ } else {
+ debug = 0;
+ }
+ putenv("LD_PRELOAD=");
+ }
+}
+void check_root(void) {
+ if (root < 0) {
+ if (getenv("XDUMMY_ROOT") != NULL) {
+ root = 1;
+ } else {
+ root = 0;
+ }
+ }
+}
+#define CHECKIT if (debug < 0) check_debug(); \
+ if (root < 0) check_root();
+
+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 (! root) {
+ if (!strcmp(pathname, "/dev/mem")) {
+ ;
+ } else if (!strcmp(pathname, "/dev/tty")) {
+ ;
+ } else if (strstr(pathname, "/dev") == pathname) {
+ store_dev = strdup(pathname);
+ pathname = tmpdir_path(pathname);
+ if (debug) fprintf(stderr, "OPEN: -> %s\n", pathname, mode);
+ 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 && fd < 256) {
+ 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);
+}
+
+FILE *fopen(const char *pathname, const char *mode) {
+ static FILE* (*real_fopen)(const char *, const char *) = NULL;
+ char *str;
+
+ 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 (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\n", 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 == 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));
+}
+
+/*
+ * Note: the following just call the real function if root is
+ * true. They will be used if -nonroot is ever figured out.
+ */
+
+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));
+}
+
+
+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 (root) {
+ return(real_ioperm(from, num, turn_on));
+ }
+ 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 (root) {
+ return(real_iopl(level));
+ }
+ return 0;
+}
+
+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 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;
+}
+
+#code_end
+}