diff options
Diffstat (limited to 'x11vnc/misc/Xdummy')
| -rwxr-xr-x | x11vnc/misc/Xdummy | 1207 |
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 +} |