183 lines
4.3 KiB
Bash
Executable File
183 lines
4.3 KiB
Bash
Executable File
#!/bin/sh -x
|
|
# Source: https://github.com/jordansissel/xdotool/blob/master/t/ephemeral-x.sh
|
|
# Start an ephemeral X server.
|
|
#
|
|
# This is useful for when you want to launch an X server for a specific
|
|
# process. When that process exits, the X server will be killed.
|
|
#
|
|
|
|
XSERVER="Xvfb -dpi 600 -screen 0 2880x1620x24" # 1080p * 1.5 for tesseract readability. Assuming x1.5 scale set up in Firefox
|
|
|
|
WINMGR=fluxbox
|
|
|
|
prog=$0
|
|
usage() {
|
|
echo "Usage: $prog [-x XSERVER] [-w WINDOWMANAGER] [-q] [-h] <command>"
|
|
echo "-h this help"
|
|
echo "-q quiet"
|
|
echo "-w window manager process to start once Xserver is up"
|
|
echo " (default: '$WINMGR')"
|
|
echo "-x Xserver (and args) to run"
|
|
echo " (default: '$XSERVER')"
|
|
echo
|
|
echo "This tool will pick an unused DISPLAY value (:0, :1, etc) and"
|
|
echo "start an Xserver on that display, then run your command."
|
|
echo
|
|
echo "Examples:"
|
|
echo " $prog -x 'Xephyr -screen 1280x720' xterm"
|
|
echo " $prog -x 'Xvnc -httpd /usr/share/vnc/classes -geometry 1024x768 -depth 24' -w "gnome-session" firefox"
|
|
}
|
|
|
|
quiet() {
|
|
return 0 # forcing quiet behavior
|
|
[ "0$QUIET" -eq 1 ]
|
|
}
|
|
|
|
test_x_available() {
|
|
xsocket=$1
|
|
! test -S $xsocket
|
|
}
|
|
|
|
test_x_healthy() {
|
|
xpid=$1
|
|
xsocket=$2
|
|
displaynum=$3
|
|
|
|
# Try xterm to see if X is up.
|
|
if which xterm > /dev/null 2>&1 ; then
|
|
DISPLAY=:$displaynum xterm -e 'true'
|
|
return $?
|
|
fi
|
|
|
|
# Try xdotool if available, if xterm is not.
|
|
if which xdotool > /dev/null 2>&1 ; then
|
|
DISPLAY=:$displaynum xdotool getmouselocation > /dev/null 2>&1
|
|
return $?
|
|
fi
|
|
|
|
# Try lsof if no X clients (above) are available
|
|
if which lsof > /dev/null 2>&1 ; then
|
|
lsof -p $xpid | grep -qF $xsocket
|
|
return $?
|
|
fi
|
|
|
|
echo "Unable to determine if X is healthy (no tools available)"
|
|
return false
|
|
}
|
|
|
|
cleanup() {
|
|
if [ ! -z "$winmgrpid" ] ; then
|
|
kill -TERM "$winmgrpid" || true
|
|
fi
|
|
kill -TERM "$xpid" || true
|
|
|
|
pkill -KILL -P $$ || true
|
|
}
|
|
|
|
POSIXLY_CORRECT=1 getopt -s sh +x:w:qh "$@" > /dev/null
|
|
if [ $? -ne 0 ] ; then
|
|
echo "Invalid arguments..."
|
|
exit 1
|
|
fi
|
|
eval "set -- $(POSIXLY_CORRECT=1 getopt -s sh +x:w:qh "$@")"
|
|
|
|
while [ "0$#" -gt 0 ] ; do
|
|
case $1 in
|
|
-x) XSERVER="$2"; shift ;;
|
|
-w) WINMGR="$2"; shift ;;
|
|
-q) QUIET=1 ;;
|
|
-h) usage; exit ;;
|
|
--) shift; break ;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
if [ "$1" = "FAIL" ] ; then
|
|
usage
|
|
exit 1
|
|
fi
|
|
|
|
num=-1
|
|
XSERVERNAME=${XSERVER%% *}
|
|
if ! which "$XSERVERNAME" > /dev/null 2>&1 ; then
|
|
echo "Unable to find $XSERVERNAME. Aborting."
|
|
cleanup
|
|
exit 1
|
|
fi
|
|
|
|
while true; do
|
|
num=$(expr $num + 1)
|
|
xsocket=/tmp/.X11-unix/X$num
|
|
quiet || echo "Trying :$num"
|
|
test_x_available $xsocket || continue
|
|
(
|
|
if quiet ; then
|
|
exec > /dev/null
|
|
exec 2> /dev/null
|
|
fi
|
|
echo set -- $XSERVER
|
|
set -- $XSERVER
|
|
cmd=$1
|
|
shift
|
|
exec $cmd :$num "$@" > /dev/null 2>&1
|
|
) &
|
|
xpid=$!
|
|
|
|
healthy=0
|
|
for i in 1 2 3 4 5 6 7 8 9 ; do
|
|
# Break early if the xserver died
|
|
#ps -p $xpid > /dev/null 2>&1 || break
|
|
kill -0 $xpid > /dev/null 2>&1 || break
|
|
|
|
# See if the xserver got a hold of the display socket.
|
|
# If so, the server is up and healthy.
|
|
sleep 1
|
|
if test_x_healthy $xpid $xsocket $num ; then
|
|
quiet || echo "$XSERVERNAME looks healthy. Moving on."
|
|
healthy=1
|
|
break
|
|
fi
|
|
sleep 0.2 || sleep 1 # In case your sleep doesn't take subsecond values
|
|
done
|
|
|
|
if [ "0$healthy" -eq 1 ] ; then
|
|
break
|
|
fi
|
|
done
|
|
|
|
sleep 3; # didn't work without it on the server for some reason
|
|
|
|
export DISPLAY=:$num
|
|
quiet || echo "Using display: $DISPLAY"
|
|
|
|
if [ ! -z "$WINMGR" -a "$WINMGR" != "none" ] ; then
|
|
if ! which $WINMGR > /dev/null 2>&1 ; then
|
|
echo "Cannot find $WINMGR. Aborting."
|
|
cleanup
|
|
exit 1
|
|
fi
|
|
WINMGRNAME=${WINMGR%% *}
|
|
$WINMGR > /dev/null 2> /dev/null &
|
|
winmgrpid=$!
|
|
|
|
# Wait for the window manager to startup
|
|
quiet || echo "Waiting for window manager '$WINMGRNAME' to be healthy."
|
|
# Wait for the window manager to start.
|
|
for i in 1 2 3 4 5 6 7 8 9 10 ABORT ; do
|
|
# A good signal that the WM has started is that the WM_STATE property is
|
|
# set or that any NETWM/ICCCM property is set.
|
|
if xprop -root | egrep -q 'WM_STATE|^_NET' ; then
|
|
quiet || echo "$WINMGRNAME looks healthy. Moving on."
|
|
break;
|
|
fi
|
|
sleep 1
|
|
|
|
if [ "$i" = "ABORT" ] ; then
|
|
quiet || echo "Window manager ($WINMGRNAME) seems to have failed starting up."
|
|
cleanup
|
|
exit 1
|
|
fi
|
|
done
|
|
fi
|
|
|