C++ 删除文件夹和所有文件/子目录

Delete folder and all files/subdirectories

提问by

How can I delete a folder with all it's files/subdirectories (recursive deletion) in C++?

如何在 C++ 中删除包含所有文件/子目录（递归删除）的文件夹？

回答by William Pursell

Seriously:

严重地：

system( "rm -rf /path/to/directory" )

Perhaps more what you're looking for, but unix specific:

也许您正在寻找更多，但特定于unix：

/* Implement system( "rm -rf" ) */

#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/syslimits.h>
#include <ftw.h>


/* Call unlink or rmdir on the path, as appropriate. */
int
rm( const char *path, const struct stat *s, int flag, struct FTW *f )
{
    int status;
    int (*rm_func)( const char * );

    switch( flag ) {
    default:     rm_func = unlink; break;
    case FTW_DP: rm_func = rmdir;
    }
    if( status = rm_func( path ), status != 0 )
        perror( path );
    else
        puts( path );
    return status;
}


int
main( int argc, char **argv )
{
    while( *++argv ) {
        if( nftw( *argv, rm, OPEN_MAX, FTW_DEPTH )) {
            perror( *argv );
            return EXIT_FAILURE;
        }
    }
    return EXIT_SUCCESS;
}

回答by avakar

You can use boost::remove_allfrom Boost.Filesystem.

您可以boost::remove_all从Boost.Filesystem使用。

回答by zeekvfu

You can use ftw(), nftw(), readdir(), readdir_r()to traverse a directory and delete files recursively.
But since neither ftw(), nftw(), readdir()is thread-safe, I'll recommend readdir_r()instead if your program runs in a multi-threaded environment.

您可以使用ftw(), nftw(), readdir(),readdir_r()遍历目录并递归删除文件。
但是，因为无论是ftw()，nftw()，readdir()是线程安全的，我会建议readdir_r()，而不是如果在一个多线程环境中的程序运行。

回答by zeekvfu

Standard C++ provides no means of doing this - you will have to use operating system specific code or a cross-platform library such as Boost.

标准 C++ 没有提供这样做的方法 - 您必须使用操作系统特定的代码或跨平台库，例如 Boost。

回答by Exagon

Since C++17 the prefered answer to this would be to use

由于 C++17 对此的首选答案是使用

std::filesystem::remove_all(const std::filesystem::path& folder)

which deletes the content of the folder recursively and then finally deletes the folder, according to this.

根据this递归删除文件夹的内容，然后最终删除文件夹。