Shell script daemon for sct

sctd

#!/bin/sh

S=4500
INC=2
SCT=/usr/local/bin/sct
DEBUG=false

if [ ! -e "$SCT" ]; then
    echo "Please install sct!"
    exit 1;
fi

function dbg {
    if [ $DEBUG ]; then
        echo $1
    fi
}

function setHM {
    H=$(date +"%H" | sed -e 's/^0//')
    M=$(date +"%M" | sed -e 's/^0//')
    HM=$((${H}*60 + ${M}))
    dbg "Current minute: ${HM}"
}

setHM

if [ $HM -gt 720 ]; then
    for i in $(jot $((1440 - $HM)));  do
        S=$((${S}+${INC}))
    done
else
    for i in $(jot $HM); do
        S=$((${S}+${INC}))
    done
fi

while true; do
    setHM

    if [ $HM -gt 720 ]; then
        S=$((${S}-${INC}))
        dbg "Decrementing S: ${S}"
    else
        S=$((${S}+${INC}))
        dbg "Incrementing S: ${S}"
    fi

    $SCT $S        

    sleep 60
done