Snail/sbin/snail-watcher.sh

28 lines
743 B
Bash
Executable File

#!/bin/bash
PATH=/usr/local/sbin:/usr/local/bin:$PATH
SERVICE=/etc/init.d/snail-xserver
LOCK_FILE=/tmp/.snail.lock
FIFO_FILE=/tmp/.snail.fifo
$SERVICE stop && snail.nv_pwr_off # stop X service
touch $LOCK_FILE && chown root:video $LOCK_FILE && chmod 660 $LOCK_FILE # create lock file
rm -f $FIFO_FILE && mkfifo --mode 660 $FIFO_FILE && chgrp video $FIFO_FILE # create fifo
{
echo >$FIFO_FILE | cat $FIFO_FILE >/dev/null # flush fifo
flock -n 9 # make exclusive lock
while [ 1 ]; do
read <$FIFO_FILE
snail.nv_pwr_on && $SERVICE start # starting X server
flock -u 9
flock 9
echo >$FIFO_FILE | cat $FIFO_FILE >/dev/null # flush fifo
$SERVICE stop && snail.nv_pwr_off # stopping X server
done
} 9>$LOCK_FILE