使用cat作为进度条

#!/bin/bash

# 进度条总长度
total_length=50

# 当前进度
current_progress=0

# 更新进度条函数
update_progress() {
    # 计算当前进度百分比
    percentage=$((current_progress * 100 / total_length))

    # 计算当前进度条长度
    progress_length=$((current_progress * total_length / 100))

    # 打印进度条
    printf "["
    for ((i=0; i<progress_length; i++))
    do
        printf "="
    done
    printf ">"
    for ((i=progress_length; i<total_length; i++))
    do
        printf " "
    done
    printf "] %d%%\r" $percentage
}

# 模拟进度更新
while [ $current_progress -le $total_length ]
do
    update_progress
    sleep 0.1
    current_progress=$((current_progress + 1))
done

# 打印完成提示
printf "\nProgress completed!\n"

chmod +x progress.sh

./progress.sh