.bin/redshift-check

   1 #!/bin/bash
   2
   3 usage() {
   4         cat <<-EOF
   5         Usage: ${0##*/} [options]
   6
   7         Options:
   8           --reset    reset display to no redshift
   9         EOF
  10
  11         if [[ $# -eq 0 ]] ; then
  12                 exit 0
  13         else
  14                 printf '\nERROR: %s\n' "$*" >&2
  15                 exit 1
  16         fi
  17 }
  18
  19 main() {
  20         cd
  21         export DISPLAY=:0
  22
  23         while [[ $# -gt 0 ]] ; do
  24                 case $1 in
  25                 --reset) exec redshift -x ;;
  26                 -h|--help) usage ;;
  27                 *) usage "Unknown option: $1" ;;
  28                 esac
  29         done
  30
  31         h=$(date +%H)
  32
  33         declare -A temps
  34         temps=(
  35                 [20]=5000
  36                 [21]=4500
  37                 [22]=4000
  38                 [23]=3500
  39                 [00]=3000
  40                 [01]=3000
  41                 [02]=3000
  42                 [03]=3000
  43                 [04]=3000
  44                 [05]=3000
  45                 [06]=3500
  46                 [07]=4000
  47                 [08]=4500
  48                 [09]=5000
  49         )
  50
  51         t=${temps[${h}]}
  52         if [[ -z ${t} ]]; then
  53                 exec redshift -x
  54         else
  55                 exec redshift -O ${t}k
  56         fi
  57 }
  58 main "$@"