函数实现

echo命令模块化：

#红色log显示
function fail_info()
{
    echo -e "\033[31m $1 \033[0m"
    exit 1
}
#绿色log显示
function success_info()
{
    echo -e "\033[32m $1 \033[0m"
}
#黄色log显示
function debug_info()
{
    echo -e "\033[33m $1 \033[0m"
}

mkdir命令模块化：

#创建文件夹，存在则删除再创建
function create_folder()
{
    dir=$1
    if [ -d "$dir" ];then
        debug_info "folder $dir is exists, delete it"
        rm -rfv "$dir"
        success_info "recreate folder $dir"
        mkdir -p "$dir"
    else
        mkdir -p "$dir"
        success_info "create folder $dir success"
    fi
}

cp命令模块化

#可拷贝文件/文件夹至指定目录，失败则正常退出
function copy_to_dir()
{
    src=$1
    dir=$2
    debug_info "src=[$src] dir=[$dir]"
    if [ ! -d "$dir" ];then
        fail_info "directory $dir is not exist"
    fi
    if [ -f "$src" ];then
        cp -rfv "$src" "$dir"
        success_info "copy folder $dir success"
    elif [ -d "$src" ];then
        cp -rfv "$src" "$dir"
        success_info "copy file $dir success"
    else
        fail_info "file or folder $src is not exist"
    fi
}

函数用例

cd /usr/lib
create_folder new_folder
copy_to_dir new_folder /usr/bin