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vncserver.in
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#!/usr/bin/perl
#
# Copyright (C) 2009-2015 D. R. Commander. All Rights Reserved.
# Copyright (C) 2010 University Corporation for Atmospheric Research.
# All Rights Reserved.
# Copyright (C) 2005-2006 Sun Microsystems, Inc. All Rights Reserved.
# Copyright (C) 2002-2009 Constantin Kaplinsky. All Rights Reserved.
# Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
# Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
#
# This 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.
#
# This software 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 this software; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
# USA.
#
#
# vncserver - wrapper script to start an X VNC server.
#
# First make sure we're operating in a sane environment.
$exedir = "";
$slashndx = rindex($0, "/");
if($slashndx>=0) {
$exedir = substr($0, 0, $slashndx+1);
}
# The script looks for the Java classes in $exedir/../java first, then if
# it can't find them there, it looks in the directory specified by
# $vncClasses.
$vncClasses = "@TVNC_JAVADIR@";
$xauth = "xauth";
&SanityCheck();
# Default configuration of the TurboVNC Server:
$geometry = "1240x900";
$depth = 24;
$vncUserDir = "$ENV{HOME}/.vnc";
$passwdFile = "$vncUserDir/passwd";
$authTypeVNC = 1;
$authTypeOTP = 1;
$generateOTP = 0;
$x509CertFile = "$vncUserDir/x509_cert.pem";
$x509KeyFile = "$vncUserDir/x509_private.pem";
$securityTypes = "";
$encTypeX509 = 1;
$enableHTTP = 1;
$skipxstartup = 0;
$autoLosslessRefresh = 0.0;
$deferUpdate = 1;
$useVGL = 0;
$autokill = 0;
$pamSession = 0;
# Read configuration from the system-wide and user files if present.
$configFile = "/etc/turbovncserver.conf";
ReadConfiguration();
$configFile = "$ENV{HOME}/.vnc/turbovncserver.conf";
ReadConfiguration();
ReadAuthConfiguration("/etc/turbovncserver-security.conf");
# Done reading configuration.
$defaultXStartup
= ("#!/bin/sh\n\n".
"unset SESSION_MANAGER\n".
"unset DBUS_SESSION_BUS_ADDRESS\n".
"OS=`uname -s`\n".
"if [ \$OS = 'Linux' ]; then\n".
" case \"\$WINDOWMANAGER\" in\n".
" \*gnome\*)\n".
" if [ -e /etc/SuSE-release ]; then\n".
" PATH=\$PATH:/opt/gnome/bin\n".
" export PATH\n".
" fi\n".
" ;;\n".
" esac\n".
"fi\n".
"if [ \"\$VGL_ISACTIVE\" = \"\" -a -f /usr/bin/mate-session ]; then\n".
" DESKTOP_SESSION=mate; export DESKTOP_SESSION\n".
" STARTUP=\"/usr/bin/mate-session\"; export STARTUP\n".
"elif [ \"\$VGL_ISACTIVE\" = \"\" -a -f /usr/bin/gnome-session ]; then\n".
" for SESSION in \"gnome-fallback\" \"ubuntu-2d\" \"2d-gnome\"; do\n".
" if [ -f /usr/share/gnome-session/sessions/\$SESSION.session ]; then\n".
" DESKTOP_SESSION=\$SESSION; export DESKTOP_SESSION\n".
" GDMSESSION=\$SESSION; export GDMSESSION\n".
" SESSIONTYPE=gnome-session; export SESSIONTYPE\n".
" XDG_CURRENT_DESKTOP=\$SESSION; export XDG_CURRENT_DESKTOP\n".
" STARTUP=\"/usr/bin/gnome-session --session=\$SESSION\"; export STARTUP\n".
" # Ubuntu 14 runs gnome-session-check-accelerated, even though the\n".
" # gnome-fallback session doesn't need OpenGL, so we set an atom to make\n".
" # gnome-session-check-accelerated think it has already been run.\n".
" xprop -root -f _GNOME_SESSION_ACCELERATED 32c -set _GNOME_SESSION_ACCELERATED 1\n".
" fi\n".
" done\n".
"fi\n".
"if [ -x /etc/X11/xinit/xinitrc ]; then\n".
" exec /etc/X11/xinit/xinitrc\n".
"fi\n".
"if [ -f /etc/X11/xinit/xinitrc ]; then\n".
" exec sh /etc/X11/xinit/xinitrc\n".
"fi\n".
"if [ -x \$HOME/.xinitrc ]; then\n".
" exec \$HOME/.xinitrc\n".
"fi\n".
"if [ -f \$HOME/.xinitrc ]; then\n".
" exec sh \$HOME/.xinitrc\n".
"fi\n".
"if [ -x /usr/local/lib/X11/xinit/xinitrc ]; then\n".
" exec /usr/local/lib/X11/xinit/xinitrc\n".
"fi\n".
"if [ -f /usr/local/lib/X11/xinit/xinitrc ]; then\n".
" exec sh /usr/local/lib/X11/xinit/xinitrc\n".
"fi\n".
"if [ \$OS = 'SunOS' -a -f \$HOME/.dt/sessions/lastsession ]; then\n".
" if [ -x `cat \$HOME/.dt/sessions/lastsession` ]; then\n".
" exec `cat \$HOME/.dt/sessions/lastsession`\n".
" fi\n".
"fi\n".
"if [ -f /usr/dt/config/Xsession.jds ]; then\n".
" exec /usr/dt/config/Xsession.jds\n".
"else\n".
" if [ -f /usr/dt/config/Xinitrc.jds ]; then\n".
" exec /usr/dt/config/Xinitrc.jds\n".
" else\n".
" if [ -f /usr/dt/bin/Xsession ]; then\n".
" exec /usr/dt/bin/Xsession\n".
" else\n".
" if [ -x /opt/sfw/bin/fvwm2 ]; then\n".
" /opt/sfw/bin/fvwm2\n".
" else\n".
" which fvwm2 && {\n".
" fvwm2\n".
" } || {\n".
" which twm && {\n".
" if [ -f \$HOME/.Xresources ]; then xrdb \$HOME/.Xresources; fi\n".
" xsetroot -solid grey\n".
" xterm -geometry 80x24+10+10 -ls -title \"\$VNCDESKTOP Desktop\" &\n".
" twm\n".
" } || {\n".
" echo No window manager found!\n".
" }\n".
" }\n".
" fi\n".
" fi\n".
" fi\n".
"fi\n");
$xauthorityFile = "$ENV{XAUTHORITY}";
$vncUserDirUnderTmp = ($vncUserDir =~ m|^/tmp/.+|) ? 1 : 0;
if (! $xstartup) {
$xstartup = ($vncUserDirUnderTmp) ?
"$ENV{HOME}/.turbovncstartup" : "$vncUserDir/xstartup.turbovnc";
}
unless ($xauthorityFile) {
if ($vncUserDirUnderTmp) {
$xauthorityFile = "$vncUserDir/.Xauthority";
} else {
$xauthorityFile = "$ENV{HOME}/.Xauthority";
}
}
chop($host = `uname -n`);
chop($os = `uname`);
if (-d "/etc/X11/fontpath.d") {
$fontPath = "catalogue:/etc/X11/fontpath.d";
}
@fontpaths = ('/usr/share/X11/fonts', '/usr/share/fonts', '/usr/share/fonts/X11', '/usr/local/lib/X11/fonts');
if (! -l "/usr/lib/X11") {push(@fontpaths, '/usr/lib/X11/fonts');}
if (! -l "/usr/X11") {push(@fontpaths, '/usr/X11/lib/X11/fonts');}
if (! -l "/usr/openwin") {push(@fontpaths, '/usr/openwin/lib/X11/fonts');}
if (! -l "/usr/X11R6") {push(@fontpaths, '/usr/X11R6/lib/X11/fonts');}
if (! -l "/opt/X11/share/fonts") {push(@fontpaths, '/opt/X11/share/fonts');}
push(@fontpaths, '/usr/share/fonts/default');
@fonttypes = ('F3bitmaps',
'misc',
'75dpi',
'100dpi',
'Speedo',
'Type1',
'ghostscript',
'liberation',
'TTF',
'OTF');
if (($fontPath eq "")) {
foreach $_fpath (@fontpaths) {
if (-f "$_fpath/encodings/encodings.dir") {
$ENV{FONT_ENCODINGS_DIRECTORY}= "$_fpath/encodings";
}
foreach $_ftype (@fonttypes) {
if (-f "$_fpath/$_ftype/fonts.dir") {
if (! -l "$_fpath/$_ftype") {
$fontPath .= "$_fpath/$_ftype,";
}
}
}
}
}
if ($fontPath) {
if (substr($fontPath, -1, 1) eq ',') {
chop $fontPath;
}
}
if ($os eq "SunOS") {
$defFontPath = "inet/:7100";
} else {
$defFontPath = "unix/:7100";
}
if ($os eq "Darwin") {
$fontPath = "$fontPath,/Library/Fonts,/System/Library/Fonts";
}
@xkbdirs = ('/usr/X11R6/lib/X11/xkb', '/usr/local/share/X11/xkb', '/opt/X11/share/X11/xkb');
foreach $_xkbdir (@xkbdirs) {
if (-d "$_xkbdir") {
$xkbdir = "$_xkbdir";
}
}
@xkbcompdirs = ('/usr/X11R6/bin', '/usr/X11/lib/X11/xkb', '/usr/local/bin', '/opt/X11/bin');
foreach $_xkbcompdir (@xkbcompdirs) {
if (-x "$_xkbcompdir/xkbcomp") {
$xkbcompdir = "$_xkbcompdir";
}
}
# Check command line options
&ParseOptions("-geometry",1,"-depth",1,"-pixelformat",1,"-name",1,"-kill",1,
"-help",0,"-h",0,"--help",0,"-fg",0,"-list",0,"-fp",1,"-otp",0,
"-securitytypes",1,"-nohttp",0,"-nohttpd",0,"-rfbauth",1,
"-noxstartup",0,"-xstartup",1,"-log",1,"-3dwm",0,"-debug",0,
"-x509cert",1,"-x509key",1,"-autokill",0);
&Usage() if ($opt{'-help'} || $opt{'-h'} || $opt{'--help'});
&Kill() if ($opt{'-kill'});
&List() if ($opt{'-list'});
# Uncomment this line if you want default geometry, depth and pixelformat
# to match the current X display:
# &GetXDisplayDefaults();
if ($opt{'-geometry'}) {
$geometry = $opt{'-geometry'};
}
if ($opt{'-depth'}) {
$depth = $opt{'-depth'};
$pixelformat = "";
}
if ($opt{'-pixelformat'}) {
$pixelformat = $opt{'-pixelformat'};
}
if ($opt{'-nohttp'}) {
$enableHTTP = 0;
}
if ($opt{'-nohttpd'}) {
$enableHTTP = 0;
}
if ($opt{'-noxstartup'}) {
$skipxstartup = 1;
}
if ($opt{'-xstartup'}) {
$xstartup = $opt{'-xstartup'};
}
if ($opt{'-3dwm'}) {
$useVGL = 1;
}
if ($opt{'-fp'}) {
$fontPath = $opt{'-fp'};
}
if ($opt{'-deferupdate'}) {
$deferUpdate = $opt{'-deferupdate'};
}
if ($opt{'-debug'}) {
$opt{'-fg'} = 1;
}
if ($opt{'-autokill'}) {
$autokill = 1;
}
$authTypeVNCPermitted = $authTypeVNC;
$encTypeX509Permitted = $encTypeX509;
if ($opt{'-securitytypes'}) {
$securityTypes = $opt{'-securitytypes'};
my $enableVNC = 0;
my $enableOTP = 0;
my $enableX509 = 0;
my $secTypes = $securityTypes;
$secTypes =~ s/[\t\ \r\n]//g;
foreach $tok (split/[,=]/, $secTypes) {
if (substr(lc $tok, -3) eq 'otp') {
$enableOTP = 1;
}
if (substr(lc $tok, -3) eq 'vnc') {
$enableVNC = 1;
}
if (substr(lc $tok, 0, 4) eq 'x509') {
$enableX509 = 1;
}
}
if ($enableVNC == 0) {
$authTypeVNC = 0;
}
if ($enableOTP == 0) {
$authTypeOTP = 0;
}
if ($enableX509 == 0) {
$encTypeX509 = 0;
}
}
if ($opt{'-rfbauth'}) {
if ($authTypeVNC) {
$passwdFile = $opt{'-rfbauth'};
}
else {
if ($authTypeVNCPermitted) {
print ("VNC Password auth is not enabled. Ignoring -rfbauth.\n");
} else {
print ("VNC Password auth is not permitted on this system. Ignoring -rfbauth.\n");
}
}
}
if ($opt{'-x509cert'}) {
if ($encTypeX509) {
$x509CertFile = $opt{'-x509cert'};
}
else {
if ($encTypeX509Permitted) {
print ("X509 encryption is not enabled. Ignoring -x509cert.\n");
} else {
print ("X509 encryption is not permitted on this system. Ignoring -x509cert.\n");
}
}
}
if ($opt{'-x509key'}) {
if ($encTypeX509) {
$x509KeyFile = $opt{'-x509key'};
}
else {
if ($encTypeX509Permitted) {
print ("X509 encryption is not enabled. Ignoring -x509key.\n");
} else {
print ("X509 encryption is not permitted on this system. Ignoring -x509key.\n");
}
}
}
if ($opt{'-otp'}) {
$generateOTP = 1;
}
if ($generateOTP && $authTypeOTP == 0) {
print ("One-Time Password authentication is not enabled. Ignoring request to generate\n");
print (" initial OTP.\n");
$generateOTP = 0;
}
&CheckGeometryAndDepth();
# Create the user's vnc directory if necessary.
unless (-e $vncUserDir) {
unless (mkdir($vncUserDir, 0700)) {
die "$prog: Could not create $vncUserDir.\n";
}
}
($z,$z,$mode) = lstat("$vncUserDir");
if (!-d _ || !-o _ || ($vncUserDirUnderTmp && ($mode & 0777) != 0700)) {
die "$prog: Wrong type or access mode of $vncUserDir.\n";
}
# Make sure the user has a password.
if ($authTypeVNC && "$passwdFile" eq "$vncUserDir/passwd") {
($z,$z,$mode) = lstat("$vncUserDir/passwd");
if (-e _ && (!-f _ || !-o _)) {
die "$prog: Wrong type or ownership on $vncUserDir/passwd.\n";
}
if (!-e _ || ($mode & 077) != 0) {
warn "\nYou will require a password to access your desktops.\n\n";
system($exedir."vncpasswd $vncUserDir/passwd");
if (($? & 0xFF00) != 0) {
exit 1;
}
}
}
# Find display number.
if ((@ARGV > 0) && ($ARGV[0] =~ /^:(\d+)$/)) {
$displayNumber = $1;
shift(@ARGV);
unless (&CheckDisplayNumber($displayNumber)) {
die "A VNC server is already running as :$displayNumber\n";
}
} elsif ((@ARGV > 0) && ($ARGV[0] !~ /^-/) && ($ARGV[0] !~ /^\+/)) {
&Usage();
} else {
$displayNumber = &GetDisplayNumber();
}
$vncPort = 5900 + $displayNumber;
if ($opt{'-log'}) {
$desktopLog = $opt{'-log'};
} else {
$desktopLog = "$vncUserDir/$host:$displayNumber.log";
}
unlink($desktopLog);
if ($opt{'-name'}) {
$desktopName = $opt{'-name'};
} else {
$desktopName = "TurboVNC: $host:$displayNumber ($ENV{USER})" unless($desktopName);
}
# Make an X server cookie - use /dev/urandom on systems that have it,
# otherwise use perl's random number generator, seeded with the sum
# of the current time, our PID and part of the encrypted form of the password.
my $cookie = "";
if (open(URANDOM, '<', '/dev/urandom')) {
my $randata;
if (sysread(URANDOM, $randata, 16) == 16) {
$cookie = unpack 'h*', $randata;
}
close(URANDOM);
}
if ($cookie eq "") {
if (-e "$vncUserDir/passwd") {
srand(time+$$+unpack("L",`cat $vncUserDir/passwd`));
} else {
srand(time+$$);
}
for (1..16) {
$cookie .= sprintf("%02x", int(rand(256)) % 256);
}
}
system("$xauth -f $xauthorityFile add $host:$displayNumber . $cookie");
system("$xauth -f $xauthorityFile add $host/unix:$displayNumber . $cookie");
if ($vncUserDirUnderTmp) {
system("$xauth merge $xauthorityFile");
}
# Now start the X VNC Server
$cmd = $exedir."Xvnc :$displayNumber";
$cmd .= " -dpi $dpi" if ($dpi);
$cmd .= " -desktop " . "edString($desktopName);
$cmd .= " -httpd $vncClasses" if ($enableHTTP && $vncClasses);
$cmd .= " -auth $xauthorityFile";
$cmd .= " -dontdisconnect";
$cmd .= " -geometry $geometry" if ($geometry);
$cmd .= " -depth $depth" if ($depth);
$cmd .= " -pixelformat $pixelformat" if ($pixelformat);
$cmd .= " -rfbwait 120000";
$cmd .= " -rfbauth $passwdFile" if ($authTypeVNC);
$cmd .= " -x509cert $x509CertFile" if ($encTypeX509);
$cmd .= " -x509key $x509KeyFile" if ($encTypeX509);
$cmd .= " -securitytypes $securityTypes" if ($securityTypes);
$cmd .= " -rfbport $vncPort";
$cmd .= " -fp $fontPath" if ($fontPath);
$cmd .= " -alr ".$autoLosslessRefresh if ($autoLosslessRefresh > 0.0);
#$cmd .= " -nolisten local" if ($os eq "SunOS");
$cmd .= " -deferupdate $deferUpdate";
$cmd .= " -xkbdir $xkbdir" if ($xkbdir);
$cmd .= " -xkbcompdir $xkbcompdir" if ($xkbcompdir);
$cmd .= " -pamsession" if ($pamSession);
foreach $arg (@ARGV) {
$cmd .= " " . "edString($arg);
}
if (!$opt{'-debug'}) {
$cmd .= " >> " . "edString($desktopLog) . " 2>&1";
}
# Run $cmd and record the process ID.
$pidFile = "$vncUserDir/$host:$displayNumber.pid";
system("$cmd & echo \$! >$pidFile");
# Give Xvnc a chance to start up
sleep(1);
unless (kill 0, `cat $pidFile`) {
warn "\nWARNING: The first attempt to start Xvnc failed, possibly because the vncserver\n";
warn "script was not able to figure out an appropriate X11 font path for this system\n";
warn "or because the font path you specified with the -fp argument was not valid.\n";
warn "Attempting to restart Xvnc using the X Font Server (xfs) ...\n";
$cmd =~ s@-fp [^ ]+@@;
$cmd .= " -fp $defFontPath" if ($defFontPath);
system("$cmd & echo \$! >$pidFile");
sleep(1);
}
unless (kill 0, `cat $pidFile`) {
warn "Could not start Xvnc.\n\n";
open(LOG, "<$desktopLog");
while (<LOG>) { print; }
close(LOG);
die "\n";
}
warn "\nDesktop '$desktopName' started on display $host:$displayNumber\n\n";
if ($generateOTP == 1) {
warn "One-Time Password authentication enabled. Generating initial OTP ...\n";
system($exedir."vncpasswd -o -display $host:$displayNumber");
if (($? & 0xFF00) != 0) {
print "Could not generate initial OTP.\n";
exit 1;
}
warn "Run 'vncpasswd -o' from within the TurboVNC session or\n 'vncpasswd -o -display $host:$displayNumber' from within this shell\n to generate additional OTPs\n";
}
# Create the user's xstartup script if necessary.
if (! $skipxstartup) {
unless (-e "$xstartup" or $opt{'-xstartup'}) {
warn "Creating default startup script $xstartup\n";
open(XSTARTUP, ">$xstartup");
print XSTARTUP $defaultXStartup;
close(XSTARTUP);
chmod 0755, "$xstartup";
}
# Run the X startup script.
warn "Starting applications specified in $xstartup\n";
if ($useVGL) {
warn "(Enabling experimental 3D window manager support)\n";
}
}
warn "Log file is $desktopLog\n\n";
# If the unix domain socket exists then use that (DISPLAY=:n) otherwise use
# TCP (DISPLAY=host:n)
if (-e "/tmp/.X11-unix/X$displayNumber") {
$ENV{DISPLAY}= ":$displayNumber";
} else {
$ENV{DISPLAY}= "$host:$displayNumber";
}
$ENV{VNCDESKTOP}= $desktopName;
$ENV{VGL_COMPRESS}= "0";
system($exedir."tvncconfig >> " . "edString($desktopLog) . " 2>&1 &");
if (! $skipxstartup) {
if ($opt{'-fg'}) {
if ($useVGL) {
system("vglrun +wm $xstartup >> " . "edString($desktopLog) . " 2>&1");
} else {
system("$xstartup >> " . "edString($desktopLog) . " 2>&1");
}
if (kill 0, `cat $pidFile`) {
$opt{'-kill'} = ':'.$displayNumber;
&Kill();
}
} else {
if ($autokill) {
if ($useVGL) {
system("(vglrun +wm $xstartup; $0 -kill :$displayNumber) >> "
. "edString($desktopLog) . " 2>&1 &");
} else {
system("($xstartup; $0 -kill :$displayNumber) >> "
. "edString($desktopLog) . " 2>&1 &");
}
} else {
if ($useVGL) {
system("vglrun +wm $xstartup >> " . "edString($desktopLog) . " 2>&1 &");
} else {
system("$xstartup >> " . "edString($desktopLog) . " 2>&1 &");
}
}
}
}
exit;
###############################################################################
#
# CheckGeometryAndDepth simply makes sure that the geometry and depth values
# are sensible.
#
sub CheckGeometryAndDepth
{
if ($geometry =~ /^(\d+)x(\d+)$/) {
$width = $1; $height = $2;
if (($width<1) || ($height<1)) {
die "$prog: geometry $geometry is invalid\n";
}
while (($width % 4)!=0) {
$width = $width + 1;
}
while (($height % 2)!=0) {
$height = $height + 1;
}
$geometry = "${width}x$height";
} else {
die "$prog: geometry $geometry is invalid\n";
}
if (($depth < 8) || ($depth > 32)) {
die "Depth must be between 8 and 32\n";
}
}
#
# GetDisplayNumber gets the lowest available display number. A display number
# n is taken if something is listening on the VNC server port (5900+n) or the
# X server port (6000+n).
#
sub GetDisplayNumber
{
foreach $n (1..99) {
if (&CheckDisplayNumber($n)) {
return $n+0; # Bruce Mah's workaround for bug in perl 5.005_02
}
}
die "$prog: no free display number on $host.\n";
}
#
# CheckDisplayNumber checks if the given display number is available. A
# display number n is taken if something is listening on the VNC server port
# (5900+n) or the X server port (6000+n).
#
sub CheckDisplayNumber
{
local ($n) = @_;
socket(S, $AF_INET, $SOCK_STREAM, 0) || die "$prog: socket failed: $!\n";
eval 'setsockopt(S, &SOL_SOCKET, &SO_REUSEADDR, pack("l", 1))';
unless (bind(S, pack('S n x12', $AF_INET, 6000 + $n))) {
close(S);
return 0;
}
close(S);
socket(S, $AF_INET, $SOCK_STREAM, 0) || die "$prog: socket failed: $!\n";
eval 'setsockopt(S, &SOL_SOCKET, &SO_REUSEADDR, pack("l", 1))';
unless (bind(S, pack('S n x12', $AF_INET, 5900 + $n))) {
close(S);
return 0;
}
close(S);
if (-e "/tmp/.X$n-lock") {
warn "\nWarning: $host:$n is taken because of /tmp/.X$n-lock\n";
warn "Remove this file if there is no X server $host:$n\n";
return 0;
}
if (-e "/tmp/.X11-unix/X$n") {
warn "\nWarning: $host:$n is taken because of /tmp/.X11-unix/X$n\n";
warn "Remove this file if there is no X server $host:$n\n";
return 0;
}
return 1;
}
#
# GetXDisplayDefaults uses xdpyinfo to find out the geometry, depth and pixel
# format of the current X display being used. If successful, it sets the
# options as appropriate so that the X VNC server will use the same settings
# (minus an allowance for window manager decorations on the geometry). Using
# the same depth and pixel format means that the VNC server won't have to
# translate pixels when the desktop is being viewed on this X display (for
# TrueColor displays anyway).
#
sub GetXDisplayDefaults
{
local (@lines, @matchlines, $width, $height, $defaultVisualId, $i,
$red, $green, $blue);
$wmDecorationWidth = 4; # a guess at typical size for window manager
$wmDecorationHeight = 24; # decoration size
return unless (defined($ENV{DISPLAY}));
@lines = `xdpyinfo 2>/dev/null`;
return if ($? != 0);
@matchlines = grep(/dimensions/, @lines);
if (@matchlines) {
($width, $height) = ($matchlines[0] =~ /(\d+)x(\d+) pixels/);
$width -= $wmDecorationWidth;
$height -= $wmDecorationHeight;
$geometry = "${width}x$height";
}
@matchlines = grep(/default visual id/, @lines);
if (@matchlines) {
($defaultVisualId) = ($matchlines[0] =~ /id:\s+(\S+)/);
for ($i = 0; $i < @lines; $i++) {
if ($lines[$i] =~ /^\s*visual id:\s+$defaultVisualId$/) {
if (($lines[$i+1] !~ /TrueColor/) ||
($lines[$i+2] !~ /depth/) ||
($lines[$i+4] !~ /red, green, blue masks/))
{
return;
}
last;
}
}
return if ($i >= @lines);
($depth) = ($lines[$i+2] =~ /depth:\s+(\d+)/);
($red,$green,$blue)
= ($lines[$i+4]
=~ /masks:\s+0x([0-9a-f]+), 0x([0-9a-f]+), 0x([0-9a-f]+)/);
$red = hex($red);
$green = hex($green);
$blue = hex($blue);
if ($red > $blue) {
$red = int(log($red) / log(2)) - int(log($green) / log(2));
$green = int(log($green) / log(2)) - int(log($blue) / log(2));
$blue = int(log($blue) / log(2)) + 1;
$pixelformat = "rgb$red$green$blue";
} else {
$blue = int(log($blue) / log(2)) - int(log($green) / log(2));
$green = int(log($green) / log(2)) - int(log($red) / log(2));
$red = int(log($red) / log(2)) + 1;
$pixelformat = "bgr$blue$green$red";
}
}
}
#
# quotedString returns a string which yields the original string when parsed
# by a shell.
#
sub quotedString
{
local ($in) = @_;
$in =~ s/\'/\'\"\'\"\'/g;
return "'$in'";
}
#
# removeSlashes turns slashes into underscores for use as a file name.
#
sub removeSlashes
{
local ($in) = @_;
$in =~ s|/|_|g;
return "$in";
}
#
# Usage
#
sub Usage
{
die("TurboVNC Server v@VERSION@ (build @BUILD@)\n".
"\n".
"Usage: $prog [<OPTIONS>] [:<DISPLAY#>]\n".
" $prog -kill :<DISPLAY#>\n".
" $prog -list\n".
"\n".
"<OPTIONS> are Xvnc options, or:\n".
"\n".
" -geometry <WIDTH>x<HEIGHT>\n".
" -depth <DEPTH>\n".
" -pixelformat rgb<NNN>\n".
" -pixelformat bgr<NNN>\n".
" -fp <FONT-PATH>\n".
" -name <DESKTOP-NAME>\n".
" -nohttpd\n".
" -otp\n".
" -fg\n".
" -autokill\n".
" -noxstartup\n".
" -xstartup <SCRIPT>\n".
" -log <FILE>\n".
"\n".
"See vncserver and Xvnc manual pages for more information.\n");
}
#
# List
#
sub List
{
opendir(dir, $vncUserDir);
my @filelist = readdir(dir);
closedir(dir);
print "\nTurboVNC server sessions:\n\n";
print "X DISPLAY #\tPROCESS ID\n";
foreach my $file (@filelist) {
if ($file =~ /$host:(\d+)$\.pid/) {
print ":".$1."\t\t".`cat $vncUserDir/$file`;
}
}
exit 1;
}
#
# Kill
#
sub Kill
{
$opt{'-kill'} =~ s/(:\d+)\.\d+$/$1/; # e.g. turn :1.0 into :1
if ($opt{'-kill'} =~ /^:\d+$/) {
$pidFile = "$vncUserDir/$host$opt{'-kill'}.pid";
} else {
if ($opt{'-kill'} !~ /^$host:/) {
die "\nCan't tell if $opt{'-kill'} is on $host\n".
"Use -kill :<number> instead\n\n";
}
$pidFile = "$vncUserDir/$opt{'-kill'}.pid";
}
unless (-r $pidFile) {
die "\nCan't find file $pidFile\n".
"You'll have to kill the Xvnc process manually\n\n";
}
$SIG{'HUP'} = 'IGNORE';
chop($pid = `cat $pidFile`);
warn "Killing Xvnc process ID $pid\n";
if (kill 0, $pid) {
system("kill $pid");
sleep(1);
if (kill 0, $pid) {
print "Xvnc seems to be deadlocked. Kill the process manually and then re-run\n";
print " ".$0." -kill ".$opt{'-kill'}."\n";
print "to clean up the socket files.\n";
exit
}
} else {
warn "Xvnc process ID $pid already killed\n";
$opt{'-kill'} =~ s/://;
if (-e "/tmp/.X11-unix/X$opt{'-kill'}") {
print "Xvnc did not appear to shut down cleanly.";
print " Removing /tmp/.X11-unix/X$opt{'-kill'}\n";
unlink "/tmp/.X11-unix/X$opt{'-kill'}";
}
if (-e "/tmp/.X$opt{'-kill'}-lock") {
print "Xvnc did not appear to shut down cleanly.";
print " Removing /tmp/.X$opt{'-kill'}-lock\n";
unlink "/tmp/.X$opt{'-kill'}-lock";
}
}
unlink $pidFile;
exit;
}
#
# ParseOptions takes a list of possible options and a boolean indicating
# whether the option has a value following, and sets up an associative array
# %opt of the values of the options given on the command line. It removes all
# the arguments it uses from @ARGV and returns them in @optArgs.
#
sub ParseOptions
{
local (@optval) = @_;
local ($opt, @opts, %valFollows, @newargs);
while (@optval) {
$opt = shift(@optval);
push(@opts,$opt);
$valFollows{$opt} = shift(@optval);
}
@optArgs = ();
%opt = ();
arg: while (defined($arg = shift(@ARGV))) {
foreach $opt (@opts) {
if ($arg eq $opt) {
push(@optArgs, $arg);
if ($valFollows{$opt}) {
if (@ARGV == 0) {
&Usage();
}
$opt{$opt} = shift(@ARGV);
push(@optArgs, $opt{$opt});
} else {
$opt{$opt} = 1;
}
next arg;
}
}
push(@newargs,$arg);
}
@ARGV = @newargs;
}
#
# Routine to make sure we're operating in a sane environment.
#
sub SanityCheck
{
local ($cmd);
#
# Get the program name
#
($prog) = ($0 =~ m|([^/]+)$|);
#
# Check we have all the commands we'll need on the path.
#
cmd:
foreach $cmd ("uname") {
for (split(/:/,$ENV{PATH})) {
if (-x "$_/$cmd") {
next cmd;
}
}
die "$prog: couldn't find \"$cmd\" on your PATH.\n";
}
if (-x "/usr/X11R6/bin/xauth") {
$xauth = "/usr/X11R6/bin/xauth";
}
elsif (-x "/usr/openwin/bin/xauth") {
$xauth = "/usr/openwin/bin/xauth";
}
else {
cmd1:
foreach $cmd ("xauth") {
for (split(/:/,$ENV{PATH})) {
if (-x "$_/$cmd") {
next cmd1;
}
}