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#!/bin/bash
####################################################
# Include: Start windowmanager for easier handling #
####################################################
## Functions ##
# Some problems may arise with windows opening in background when
# using eg. vmware without a window manager.
start_wm() {
# xfwm4 and metacity make the VM appear frozen after openslx.exe
# tries to change the resolution. for xfwm4 the fix is to disable
# composition. xfwm4 is better suited for mutli-screen. openbox
# sometimes puts both virtual screens on the same physical screen,
# vmware outright acts up if the window manager doesn't expose the
# _NET_WM_FULLSCREEN_MONITORS atom (which openbox doesn't).
if [ "$DISPLAY_COUNT" -gt 1 ]; then
set -- "$@" xfwm4 openbox
else
set -- "$@" openbox xfwm4
fi
local i dm
dm=
for i in "$@" blackbox kwin; do
if command -v "${i}" &> /dev/null ; then
dm="$i"
break
fi
done
if isempty dm; then
# not fatal, so do not exit but report via slxlog
slxlog "runvirt-wm" "Could not find any window manager to use!"
notify_user "Konnte keinen Window Manager finden. (Das ist schlecht!)"
return 1
fi
# If it's the same, do nothing
if ! is_wm_running "${dm}"; then
# start DM determined above
declare -a OPTS=()
case "${dm}" in
openbox|kwin|metacity)
OPTS+=( "--replace" )
;;
xfwm4)
OPTS+=( "--replace" "--compositor=off" )
;;
blackbox)
# Don't replace background, toolbar not always on top
OPTS+=( "-rc" "/opt/openslx/vmchooser/config/blackbox.rc" )
;;
fvwm2)
echo "EdgeScroll 0 0" > "${TMPDIR}/fvwm"
OPTS+=( "-replace" "-f" "${TMPDIR}/fvwm" )
;;
esac
stop_wm
writelog "Starting ${dm} ${OPTS[*]}."
declare -g RUNVIRT_DM="${dm}"
{
trap '' HUP
trap '[ -n "$wpid" ] && kill "$wpid"' EXIT
trap '[ -n "$wpid" ] && kill "$wpid"; exit 5' INT
trap '[ -n "$wpid" ] && kill "$wpid"; exit 6' TERM
dc=0
while true; do
s="$( date +%s )"
"${RUNVIRT_DM}" "${OPTS[@]}" &> /dev/null &
wpid=$!
wait
ret=$?
wpid=
e="$( date +%s )"
duration="$(( e - s ))"
case "$ret" in
0|129|130|143)
writelog "WM exited normally"
exit 0 ;;
esac
if [ "$duration" -ge 3 ]; then
dc=0
elif [ "$(( dc++ ))" -gt 5 ]; then
notify_user "$RUNVIRT_DM crasht immer wieder."
writelog "$RUNVIRT_DM keeps crashing"
exit 1
fi
done
} &
declare -g RUNVIRT_DM_PID="$!"
fi
# run very simple taskbar in case user minimizes VM somehow and doesn't know Alt+Tab
if [ -z "$RUNVIRT_TASKBAR_PID" ] || ! kill -0 "$RUNVIRT_TASKBAR_PID"; then
( sleep 1; exec fspanel --background ) &
declare -g RUNVIRT_TASKBAR_PID="$!"
fi
# This script conditionally runs useful stuff, like xfce4's power manager that can handle
# backlight control keys, in case it sees there is a backlight
/opt/openslx/scripts/start-useful-session-daemons
if isempty HAVE_WM_CLEANUP_HOOK; then
add_cleanup stop_wm
declare -rg HAVE_WM_CLEANUP_HOOK=yes
fi
return 0
}
is_wm_running() {
isempty RUNVIRT_DM_PID && return 1
! isempty "$1" && [ "$RUNVIRT_DM" != "$1" ] && return 1
kill -0 "$RUNVIRT_DM_PID"
}
stop_wm() {
if ! isempty RUNVIRT_TASKBAR_PID; then
kill "$RUNVIRT_TASKBAR_PID"
declare -g RUNVIRT_TASKBAR_PID=
fi
if ! isempty RUNVIRT_DM_PID; then
kill "$RUNVIRT_DM_PID"
usleep 100000
kill -9 "$RUNVIRT_DM_PID"
declare -g RUNVIRT_DM_PID=
declare -g RUNVIRT_DM=
fi
}
## MAIN ##
call_post_source start_wm
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