command_stream.sh

#!/bin/zsh

dir=$HOME/.command_stream
fil=$dir/tmp.txt
com=$1
mkdir -p $dir

case $1 in
    -h)
        echo -e "
        \$1...command
        \$2...count
        -n...clear
        ";;
    -n)
        rm $fil && echo 1 > $fil
        ;;
    *)
    case $# in
        1) arg=5;;
        2) arg=$2;;
        0) com="df -h | grep disk | sed 's/  /,/g'";;
        *) exit;;
    esac
    max=`zsh -c $com | wc -c | tr -d ' '`
    if [ -e $fil ]; then
        i=`cat $fil | tail -n 1`
        if [ $i -le $max ]; then
            a=$i"-"`expr $i + $arg` > /dev/null 2&>1
            b=`zsh -c $com | cut -c $a` > /dev/null 2&>1
            echo "$b"
            echo `expr $i + 1` >> $fil
        else
            rm $fil
            echo 1 > $fil
        fi
    else
        echo 1 > $fil
    fi
    ;;
esac