contrib/ppinload.sh

   1 #!/bin/bash
   2
   3 [ -w /dev/ppin ] || exit 1
   4 [ "$1" = "-v" ] && VERBOSE=1 || unset VERBOSE
   5
   6 export LC_ALL=C
   7
   8 function set_ppin_up_to()
   9 {
  10         declare -i count="$1"
  11         declare -i n=0
  12         while [ $n -lt 8 ]; do
  13                 [ $n -lt $count ] \
  14                         && echo "$n on" >/dev/ppin \
  15                         || echo "$n off" >/dev/ppin
  16         n=$n+1
  17         done
  18 }
  19
  20 function load_ppin()
  21 {
  22         if [ $load -lt 3 ]; then        #    < 0.03: 0 PINs     d=0.03
  23                 set_ppin_up_to 0
  24         elif [ $load -lt 10 ]; then     # 0.03-0.09: 1 PIN      d=0.07
  25                 set_ppin_up_to 1
  26         elif [ $load -lt 24 ]; then     # 0.10-0.24: 2 PIN      d=0.15
  27                 set_ppin_up_to 2
  28         elif [ $load -lt 50 ]; then     # 0.25-0.49: 3 PINs     d=0.25
  29                 set_ppin_up_to 3
  30         elif [ $load -lt 100 ]; then    # 0.50-0.99: 4 PINs     d=0.50
  31                 set_ppin_up_to 4
  32         elif [ $load -lt 200 ]; then    # 1.00-1.99: 5 PINs     d=1.00
  33                 set_ppin_up_to 5
  34         elif [ $load -lt 400 ]; then    # 2.00-3.99: 6 PINs     d=2.00
  35                 set_ppin_up_to 6
  36         elif [ $load -lt 800 ]; then    # 4.00-7.99: 7 PINs     d=4.50
  37                 set_ppin_up_to 7
  38         else                            #    > 8.00: 8 PINs
  39                 set_ppin_up_to 8
  40         fi
  41 }
  42
  43 while true; do
  44         declare load_raw=`cat /proc/loadavg | cut -d' ' -f1`
  45         declare -i load=`echo $load_raw | sed -e "s/\.//" | sed -e "s/^0*//g"`
  46         [ -n "$VERBOSE" ] && echo "Load: $load_raw"
  47         load_ppin
  48         sleep 1
  49 done