Solved

UNIX command rm -rf in C

Posted on 2007-03-18
3
1,554 Views
Last Modified: 2010-05-18
How can you implement the standard UNIX command "rm -rf" in C, in order to remove an entire directory tree and all files inside the tree?

I realize I could just do:

system("rm -rf somedir");

But usually there are corresponding C lib functions for every UNIX command.  For example, there is an mkdir() function in C.  But the rmdir() function in C only takes a single argument, (the path), and fails if the specified directory is not empty.  So is there a way to get the functionality of rm -rf using the C library?
0
Comment
Question by:chsalvia
  • 2
3 Comments
 
LVL 53

Expert Comment

by:Infinity08
ID: 18744996
Well, basically, you just remove all files within the directory, and then remove the directory. All of that recursively. So, pseudo code :

    function remove_dir(directory)
        for each file in remove_dir
            remove_file(file)
        end for
        for each dir in remove_dir
            remove_dir(dir)                          <----- recursive call
        end for
        remove_file(directory)
    end function
0
 
LVL 53

Accepted Solution

by:
Infinity08 earned 125 total points
ID: 18744997
Should have been this of course :

    function remove_dir(directory)
        for each file in directory
            remove_file(file)
        end for
        for each dir in directory
            remove_dir(dir)                          <----- recursive call
        end for
        remove_file(directory)
    end function
0
 
LVL 24

Assisted Solution

by:slyong
slyong earned 125 total points
ID: 18745099
You can have a read at the actual code for rm implementation here http://www.koders.com/c/fidD3021906AECAFB50B537CC4CEC66C335636DF6E1.aspx?s=bash
0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

If you have a server on collocation with the super-fast CPU, that doesn't mean that you get it running at full power. Here is a preamble. When doing inventory of Linux servers, that I'm administering, I've found that some of them are running on l…
I. Introduction There's an interesting discussion going on now in an Experts Exchange Group — Attachments with no extension (http://www.experts-exchange.com/discussions/210281/Attachments-with-no-extension.html). This reminded me of questions tha…
Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…
The goal of this video is to provide viewers with basic examples to understand opening and writing to files in the C programming language.

910 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

22 Experts available now in Live!

Get 1:1 Help Now