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#!/bin/sh
#
# x11vnc_loop:
#
# Example startup script for connecting x11vnc to an X display
# at system boot up and having it reconnect when the X server restarts.
#
# Run, in rc.local say, via, e.g.:
#
# /path/to/x11vnc_loop 1>> /var/tmp/x11vnc_loop.log 2>&1 &
#
# call with argument "once" or a number to limit the number of loops.
#
##########################################################################
# The following needs to be customized:
x11vnc_cmd=x11vnc # or use full path (or set PATH).
pwfile=/path/to/vnc/passwd # always use a password
display=:0 # display of interest
restart_sleep=5 # pause between X server restarts.
# modify cmdline args if desired:
x11vnc_args="-display $display -rfbauth $pwfile -forever -nap"
# you may need to customize the "grep", etc, below in get_xauthority_file()
##########################################################################
if [ "X$1" != "X" ]; then
max=$1
shift
fi
get_xauthority_file() {
#
# We need to find the MIT-COOKIE file... this not portable at all,
# depends on OS, distro, desktop, phase of moon, etc...
#
# If the cookie file was fixed and you knew it, you could just
# return it here e.g.:
#
## echo "/var/gdm/:0.Xauth"; return
#
# or, if you knew the directory, you could look for the youngest
# file there and return it e.g.:
#
## echo `ls -t /var/lib/xdm/authdir/authfiles/* | head -1`; return
# this hack tries to grep it out of ps output...
xauth=""
for i in 1 2 3
do
# very linux specific, and you likely need to tweak..
patt="X11R6.*/X.*-auth"
xauth=`ps wwwaux | grep "$patt" \
| egrep -v 'grep|Xprt' | head -1 \
| sed -e 's/^.*-auth//' | awk '{print $1}'`
if [ "X$xauth" != "X" ]; then
break
fi
sleep 2 # wait a bit in case X server is restarting slowly.
done
echo $xauth
}
try=1
while [ 1 ]
do
echo "`date` $0 try number: $try"; try=`expr $try + 1`
auth=`get_xauthority_file`
if [ ! -r "$auth" ]; then
echo "`date` bad auth file: \"$auth\""
else
cmd="$x11vnc_cmd $x11vnc_args"
sleep 1
echo "`date` running: $cmd -auth $auth"
# run x11vnc:
$cmd -auth $auth
if [ "X$max" = "Xonce" ]; then
exit $?
fi
fi
if echo "$max" | grep '[0-9]' > /dev/null; then
if [ $try -gt $max ]; then
exit
fi
fi
sleep $restart_sleep
done
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