.bin/redshift-check

   1 #!/bin/sh
   2 h=$(date +%H)
   3 if [ ${h#0} -lt 10 -o ${h#0} -ge 21 ]; then
   4         (pgrep redshift >/dev/null 2>&1 || DISPLAY=:0 redshift) &
   5 else
   6         killall -q redshift
   7 fi
   8 :