.bin/redshift-check

   1 #!/bin/bash
   2
   3 usage() {
   4         cat <<-EOF
   5         Usage: ${0##*/} [options]
   6
   7         Options:
   8           -x, --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 rs() {
  20         exec redshift -m randr "$@"
  21 }
  22
  23 main() {
  24         cd /
  25         export DISPLAY=:0
  26
  27         while [[ $# -gt 0 ]] ; do
  28                 case $1 in
  29                 -x|--reset) rs -x ;;
  30                 -h|--help) usage ;;
  31                 *) usage "Unknown option: $1" ;;
  32                 esac
  33         done
  34
  35         h=$(date +%H)
  36
  37         declare -A temps
  38         temps=(
  39                 [20]=5000
  40                 [21]=4500
  41                 [22]=4000
  42                 [23]=3500
  43                 [00]=3000
  44                 [01]=3000
  45                 [02]=3000
  46                 [03]=3000
  47                 [04]=3000
  48                 [05]=3000
  49                 [06]=3500
  50                 [07]=4000
  51                 [08]=4500
  52                 [09]=5000
  53         )
  54
  55         t=${temps[${h}]}
  56         if [[ -z ${t} ]]; then
  57                 rs -x
  58         else
  59                 rs -O ${t}k
  60         fi
  61 }
  62 main "$@"