shell腳本實現命令執行等待狀態顯示的三種方式

顯示狀態1-處於"/"旋轉

#!/bin/sh
sleep 10 &
pid=$! # Process Id of the previous running command

spin='-\|/'

i=0
while kill -0 $pid 2>/dev/null
do
  i=$(( (i+1) %4 ))
  printf "\r[${spin:$i:1}]"
  sleep .1
done

顯示狀態2-進度條前進狀態

#!/bin/sh
j=''
for ((i=0;$i<=100;i+=2))
do
        printf "progress:[%-50s]%d%%\r" $j $i
        sleep 0.1
        j=#$j
done
echo

顯示狀態3-進度條前進+處於"/"旋轉

#!/bin/bash
i=0
j='#'
k=('|' '\' '-' '/')
l=0
while [ $i -le 25 ]
do
    printf "progress:[%-25s][%d%%][%c]\r" $j $(($i*4)) ${k[$l]}
    j+='#'
    let i++
    let l=i%4
    sleep 0.1
done
printf "\n"