BASH：编写脚本以递归旅行氮水平的目录 [英] BASH: Writing a Script to Recursively Travel a Directory of N Levels

问题描述

我有以下的目录结构，例如：

I have the following directory structure for example:

/test_dir/d
/test_dir/d/cron
/test_dir/d/cache
/test_dir/d/...(more sub dirs)
/test_dir/tree
/test_dir/tree/a
/test_dir/tree/a/a1
/test_dir/tree/a/a2
...(and so on for b/ and c/ )

我已经写了下面的bash脚本，有效地传播到 / test_dir 的第二个级别，以便将达到 / test_dir / D / cron的或 / test_dir /树/ A ，但不会走得更远。我想不通，为什么递归脚本将不会进一步旅行可以有人请调试脚本，并指出我的错误？

I've written the following bash script that effectively travels to the second level of /test_dir so it will reach /test_dir/d/cron or /test_dir/tree/a but will not go further. I cannot figure out why the recursive script will not travel further can someone please debug the script and point out my error?

这里是我写的：

#!/bin/bash

#script to recursively travel a dir of n levels

function traverse() {   

for file in `ls $1`
do
    #current=${1}{$file}
    if [ ! -d ${1}${file} ] ; then
        echo " ${1}${file} is a file"
    else
        #echo "entering recursion with: ${1}${file}"
            traverse "${1}/${file}"
    fi
done
}

function main() {
    traverse $1
}

main $1

下面是输出：

/test_dir/a is a file
/test_dir/b is a file
/test_dir//dcache is a file
/test_dir//dcron is a file
/test_dir//dgames is a file
/test_dir//dlib is a file
/test_dir//dlog is a file
/test_dir//drun is a file
/test_dir//dtmp is a file
/test_dir/movies is a file
/test_dir//treea is a file
/test_dir//treeb is a file
/test_dir//treec is a file
/test_dir//treed is a file

我知道有可能更优雅的一行命令来做到这一点。但是我试图做到这一点在这个明确的方式。我对这个职位的长度道歉。

I know there are probably more elegant one line commands to do this. But im trying to do it in this explicit manner. I apologize for the length of this post.

编辑：使用横$ {1} / $ {}文件

推荐答案

若干问题的脚本。它应该是这样的：

Several problems with the script. It should be like this:

#!/bin/bash

#script to recursively travel a dir of n levels

function traverse() {
for file in "$1"/*
do
    if [ ! -d "${file}" ] ; then
        echo "${file} is a file"
    else
        echo "entering recursion with: ${file}"
        traverse "${file}"
    fi
done
}

function main() {
    traverse "$1"
}

main "$1"

不过，递归遍历目录正确的方法是使用find命令：

However, the correct way to recursively traverse a directory is by using the find command:

find . -print0 | while IFS= read -r -d '' file
do 
    echo "$file"
done

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