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This article mainly explains "how to use shell to write a script that recursively traverses directories and subdirectories". The content in the article is simple and clear, and it is easy to learn and understand. below, please follow Xiaobian's train of thought to slowly deepen, to study and learn "how to use shell to write recursive scripts to traverse directories and subdirectories".

Using the script written by shell to recursively traverse the directory, the script recursively traverses the specified directory and prints the file name under the directory.

Example 1:

The code is as follows:

#! / bin/sh

Function scandir () {

Local cur_dir parent_dir workdir

Workdir=$1

Cd ${workdir}

If [${workdir} = "/"]

Then

Cur_dir= ""

Else

Cur_dir=$ (pwd)

Fi

For dirlist in $(ls ${cur_dir})

Do

If test-d ${dirlist}; then

Cd ${dirlist}

Scandir ${cur_dir} / ${dirlist}

Cd..

Else

Echo ${cur_dir} / ${dirlist}

Fi

Done

}

If test-d $1

Then

Scandir $1

Elif test-f $1

Then

Echo "you input a file but not a directory,pls reinput and try again"

Exit 1

Else

Echo "the Directory isn't exist which you input,pls input a new Oneworld!"

Exit 1

Fi

Example 2: recursively read directories and their subdirectories

The code is as follows:

#! / bin/bash

Function read_dir () {

For file in `ls $1`

Do

If [- d $1 "/" $file] / / Note that a space must be added here, otherwise an error will be reported.

Then

Read_dir $1 "/" $file

Else

Echo $1 "/" $file

Fi

Done

}

# Test directory test

Read_dir test

In this way, the test.sh can be executed with execution permission.

The code is as follows:

Chmod + x test.sh

Sh test.sh

At this point, you can read the catalog file by passing parameters.

Example 3:

The code is as follows:

Recursively implement each subdirectory grandchild directory.

#! / bin/bash

# modify.func

Doit () / / handles non-directory files in the current directory and ignores directory files

{

Oldname= `ls | grep "$1 $" `

For name in $oldname

Do

If [- d "$name"]

Then:

Else

Basename= `echo $name | awk-F "."'{print $1}'`

Newname= "$basename$2"

Echo-e "$PWD/$name\ t\ t$newname"

Mv $name $newname

Count= `expr ${count} + 1`

Fi

Done

Return 0

}

Do_recursive () / / Recursively process each directory starting from the current directory

{

Doit $1 $2

For filename in `ls`

Do

If [- d "$filename"]

Then

Cd $filename

Do_recursive $1 $2

Cd..

Fi

Done

Return 0

}

Modify () / / processes the current directory and reports the result, which is equivalent to the main function, or you can call do_recursive directly

{

PARAMS=2

If [$#-ne $PARAMS]

Then

Echo "usage: mv_to .suf1 .suf2"

Return 1

Fi

Count=0

Do_recursive $1 $2

Echo "complete! $count files have been modified."

Return 0

}

Thank you for your reading, the above is the content of "how to use shell to write recursive scripts for traversing directories and subdirectories". After the study of this article, I believe you have a deeper understanding of how to use shell to write scripts for recursive traversing directories and subdirectories, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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