shell_progress.txt

在unix下的用shell写的进度显示小程序

#!/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