nsbin/x-monitors.sh

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#!/bin/sh
#
# 2009 Nico Schottelius (nico-nsbin at schottelius.org)
#
# This file is part of nsbin.
#
# nsbin 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 3 of the License, or
# (at your option) any later version.
#
# nsbin 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 nsbin. If not, see <http://www.gnu.org/licenses/>.
#
#
# Automatically manage connected and disconnected external monitors with xrandr
#
# Add your main monitor to ~/.x-monitors-main (i.e. the laptop screen),
# and add all possible other monitors in the positions files
# ~/.x-monitors-{left-of right-of above below}.
#
#
#
################################################################################
main="$(cat ~/.x-monitors-main)"
positions="left-of right-of above below"
prefix=".x-monitors-"
i=0
xrandr --output "${main}" --auto
# Needs to run twice: xrandr may not be able to
# enable a newly connected monitor, because a disconnected one
# is still enabled. The first runs disables disconnected monitors, the
# second one enables all connected ones.
while [ "${i}" -lt 2 ]; do
# search for all possible monitors in all positions
for position in $positions; do
posfile="${HOME}/${prefix}${position}"
if [ -f "${posfile}" ]; then
while read output; do
xrandr --output "${output}" --${position} "${main}" --auto
done < "${posfile}"
fi
done
i=$(($i+1))
done