shell

1. 旋转指针

CODE:

#!/bin/sh
proc() {

    c0='-'
    c1='\'
    c2='|'
    c3='/'
    begin=$1
    end=$2
    row=$3
    pos1=`expr $begin + 1`
    pos2=`expr $begin + 5`

    printf "\033[2J"
    while [ $begin -le $end  ]; do
        index=`expr $begin % 4`
        pro=`echo "scale=0; ${begin}*100/$end" | bc`
        eval printf \"'\033[${row};${bos1}H$c'$index  '$pro%%  '\"
        begin=`expr $begin + 1`
    done
    echo "done"
}

# call subroutine
proc 0 102 20

2. 进度条

CODE:

#!/bin/sh

abort() {
    printf  "\033[m\n"
    exit
}

# do nothing, just simulate time consume.
idle() {
    i=1
    sum=`date +%S`
    sum=`expr $sum \* $sum | cut -b 1`
    sum=`expr $sum \* 10`
    while [ $i -le $sum ]; do
        i=`expr $i + 2 `
        trap abort  2
    done
}

proc() {
    begin=$1
    end=$2
    row=$3
    pos1=`expr $begin + 1`
    pos2=`expr $end - 1`
    mid=`echo "($begin+$end)/2-2" |bc`

    printf "\033[2J"
    printf "\033[${row};${begin}H["
    printf "\033[${row};${end}H]"
    while [ $pos1 -le $pos2  ]; do
        pro=`echo "scale=0; ($pos1 - $begin)*100/($pos2-$begin)" | bc`
        if [ $pos1 -gt $mid ]; then
            printf "\033[7m\033[${row};${mid}H$pro%%\033[${row};${pos1}H:"
        else
            printf "\033[m\033[${row};${mid}H$pro%%\033[7m\033[${row};${pos1}H:"
        fi
        pos1=`expr $pos1 + 1`
        idle
        trap abort  2
    done
    printf "\033[m\n"
    echo "done"
}

# call subroutine
printf "### proc 1 80 10 ### hit ENTER to continue "
if read a; then
    proc 1 80 10
fi

printf "### proc 25 55 10 ### hit ENTER to continue "
if read a; then
    proc 25 55 20
fi