#!/bin/sh
#
# 40autorandr: Change autorandr profile on thaw/resume
exec > /var/log/autorandr.log 2>&1

AUTORANDR="autorandr -c --default default"

detect_display()
{
	# Wait for the system to recognize the changed state, see bug #30
	# Note the ampersand below, this runs asynchroneously.
	sleep 5

	for X in /tmp/.X11-unix/X*; do
		D="${X##/tmp/.X11-unix/X}"
		# Prefer w to who, see bug #39
		if [ -x "`which w`" ]; then
			user="`w -h | awk -vD="$D" '$2 ~ ":"D"(.[0-9])?$" || $3 ~ ":"D"(.[0-9])?$" {print $1}' | head -n1`"

			if [ -z "$user" ];	then
				# This fallback checks if there is exactly one user (except
				# root) logged in an interactive session and assumes the
				# session belongs to him. See bug #39.
				user="`w -hu | awk '/^\w+/ && $1 !~ "root" { users[$1]=$1; } ENDFILE { if(asort(users) == 1) for(u in users) print users[u]; }'`"
			fi
		else
			user="`who --all | awk -vD="$D" '$3 ~ ":"D"(.[0-9])?$" {print $1}' | head -1`"

			if [ -z "$user" ];	then
				# Same fallback as above; see bug #39.
				user="`who -u | awk '/^\w+/ && $1 !~ "root" { users[$1]=$1; } ENDFILE { if(asort(users) == 1) for(u in users) print users[u]; }'`"
			fi
		fi

		if [ x"$user" != x"" ]; then
			logger "autorandr: Changing display configuration for display :$D, user '$user'"
			export DISPLAY=":$D"
			/bin/su -c "${AUTORANDR}" "$user"
		fi
	done
}

case "$1" in
	thaw|resume)
		detect_display &
		;;
esac