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Comment supprimer un dossier en C++?

Comment puis-je supprimer un dossier en utilisant C++?

S'il n'existe pas de moyen multiplateforme, comment procéder pour les systèmes d'exploitation les plus populaires - Windows, Linux, Mac, iOS, Android? Une solution POSIX fonctionnerait-elle pour tous?

35
user88240
58
Edouard A.

Supprimer le dossier (sous-dossiers et fichiers) sous Windows (VisualC++) sans utiliser les API de Shell, voici le meilleur exemple de travail:

#include <string>
#include <iostream>

#include <windows.h>
#include <conio.h>


int DeleteDirectory(const std::string &refcstrRootDirectory,
                    bool              bDeleteSubdirectories = true)
{
  bool            bSubdirectory = false;       // Flag, indicating whether
                                               // subdirectories have been found
  HANDLE          hFile;                       // Handle to directory
  std::string     strFilePath;                 // Filepath
  std::string     strPattern;                  // Pattern
  WIN32_FIND_DATA FileInformation;             // File information


  strPattern = refcstrRootDirectory + "\\*.*";
  hFile = ::FindFirstFile(strPattern.c_str(), &FileInformation);
  if(hFile != INVALID_HANDLE_VALUE)
  {
    do
    {
      if(FileInformation.cFileName[0] != '.')
      {
        strFilePath.erase();
        strFilePath = refcstrRootDirectory + "\\" + FileInformation.cFileName;

        if(FileInformation.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
        {
          if(bDeleteSubdirectories)
          {
            // Delete subdirectory
            int iRC = DeleteDirectory(strFilePath, bDeleteSubdirectories);
            if(iRC)
              return iRC;
          }
          else
            bSubdirectory = true;
        }
        else
        {
          // Set file attributes
          if(::SetFileAttributes(strFilePath.c_str(),
                                 FILE_ATTRIBUTE_NORMAL) == FALSE)
            return ::GetLastError();

          // Delete file
          if(::DeleteFile(strFilePath.c_str()) == FALSE)
            return ::GetLastError();
        }
      }
    } while(::FindNextFile(hFile, &FileInformation) == TRUE);

    // Close handle
    ::FindClose(hFile);

    DWORD dwError = ::GetLastError();
    if(dwError != ERROR_NO_MORE_FILES)
      return dwError;
    else
    {
      if(!bSubdirectory)
      {
        // Set directory attributes
        if(::SetFileAttributes(refcstrRootDirectory.c_str(),
                               FILE_ATTRIBUTE_NORMAL) == FALSE)
          return ::GetLastError();

        // Delete directory
        if(::RemoveDirectory(refcstrRootDirectory.c_str()) == FALSE)
          return ::GetLastError();
      }
    }
  }

  return 0;
}


int main()
{
  int         iRC                  = 0;
  std::string strDirectoryToDelete = "c:\\mydir";


  // Delete 'c:\mydir' without deleting the subdirectories
  iRC = DeleteDirectory(strDirectoryToDelete, false);
  if(iRC)
  {
    std::cout << "Error " << iRC << std::endl;
    return -1;
  }

  // Delete 'c:\mydir' and its subdirectories
  iRC = DeleteDirectory(strDirectoryToDelete);
  if(iRC)
  {
    std::cout << "Error " << iRC << std::endl;
    return -1;
  }

  // Wait for keystroke
  _getch();

  return 0;
}

Source: http://www.codeguru.com/forum/showthread.php?t=239271

19
hB0

Avec C++ 17, vous pouvez utiliser std::filesystem , en C++ 14 std::experimental::filesystem est déjà disponible. Les deux permettent l'utilisation de filesystem::remove() .

C++ 17:

#include <filesystem>
std::filesystem::path::remove("myEmptyDirectoryOrFile"); // Deletes empty directories or single files.
std::filesystem::path::remove_all("myDirectory"); // Deletes one or more files recursively.

C++ 14:

#include <experimental/filesystem>
std::experimental::filesystem::path::remove("myDirectory");

Remarque 1: Ces fonctions génèrent filesystem_error en cas d'erreur. Si vous voulez éviter de capturer des exceptions, utilisez les variantes surchargées avec std::error_code en tant que second paramètre. Par exemple.

std::error_code errorCode;
if (!std::filesystem::path::remove("myEmptyDirectoryOrFile", errorCode)) {
    std::cout << errorCode.message() << std::endl;
}

Remarque 2: La conversion en std::filesystem::path est implicite à partir de différents codages, vous pouvez donc passer des chaînes à filesystem::remove() .

10
Roi Danton

Le répertoire devrait être vide.

BOOL RemoveDirectory( LPCTSTR lpPathName );
9
Vinay
void remove_dir(char *path)
{
        struct dirent *entry = NULL;
        DIR *dir = NULL;
        dir = opendir(path);
        while(entry = readdir(dir))
        {   
                DIR *sub_dir = NULL;
                FILE *file = NULL;
                char abs_path[100] = {0};
                if(*(entry->d_name) != '.')
                {   
                        sprintf(abs_path, "%s/%s", path, entry->d_name);
                        if(sub_dir = opendir(abs_path))
                        {   
                                closedir(sub_dir);
                                remove_dir(abs_path);
                        }   
                        else 
                        {   
                                if(file = fopen(abs_path, "r"))
                                {   
                                        fclose(file);
                                        remove(abs_path);
                                }   
                        }   
                }   
        }   
        remove(path);
}
6
user4385463

Utilisez SHFileOperation pour supprimer le dossier de manière récursive

5
user1803888

Le répertoire doit être vide et votre programme doit avoir les autorisations pour le supprimer.

mais la fonction appelée rmdir le fera

rmdir("C:/Documents and Settings/user/Desktop/itsme") 
4
TStamper

Vous pouvez aussi essayer ceci si vous êtes sur Linux:

system("rm -r path");
3
Meysam

Essayez d'utiliser le système "rmdir -s -q file_to_delte". 
Cela supprimera le dossier et tous les fichiers qu'il contient.

0
xlu

La norme C++ définit la fonction remove (), qui peut ou non supprimer un dossier, en fonction de l'implémentation. Si ce n'est pas le cas, vous devez utiliser une fonction spécifique à l'implémentation telle que rmdir ().

0
anon

Ma propre implémentation basée sur hB0 qui vous permet également d’afficher le nombre de fichiers dans chaque dossier avec également un gain de performances.

#include <string>
#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <windows.h>
#include <conio.h>

union seperated {
  struct {
    unsigned int low;
    unsigned int high;
  } uint;
  unsigned long long ull;
};

unsigned long long num_dirs  = 1;
unsigned long long num_files = 0;
seperated size_files;

int DeleteDirectory( char* refRootDirectory );      //predeclare it

int DeleteDirectory( char* refRootDirectory ) {
    HANDLE      hFile;              // Handle to directory
    std::string strFilePath;            // Filepath
    WIN32_FIND_DATA FileInformation;    // File information
    int     dwError;            // Folder deleting error
    std::string strPattern;         // Pattern

    strPattern = (std::string)(refRootDirectory) + "\\*.*";
    hFile = ::FindFirstFile( strPattern.c_str(), &FileInformation );

    if( hFile != INVALID_HANDLE_VALUE )
    {
        do {
            if( FileInformation.cFileName[0] != '.' ) {
                strFilePath.erase();
                strFilePath = std::string(refRootDirectory) + "\\" + FileInformation.cFileName;

                if( FileInformation.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ) {
                    DeleteDirectory( (char*)strFilePath.c_str() );

                    dwError = ::GetLastError();
                    if( dwError != ERROR_NO_MORE_FILES ) {
                        std::cout << "!ERROR!: [[" << strFilePath.c_str() << "]]\n";
                        return dwError;
                    } else {
                        // Set directory attributes
                        if( ! ::SetFileAttributes(refRootDirectory,FILE_ATTRIBUTE_NORMAL) ) {
                            std::cout << "!ERROR!: [[" << strFilePath.c_str() << "]]\n";
                            return ::GetLastError();
                        }

                        // Delete directory
                        if( ! ::RemoveDirectory(refRootDirectory) ) {
                            std::cout << "!ERROR!: [[" << strFilePath.c_str() << "]]\n";
                            return ::GetLastError();
                        }
                    }

                    ++num_dirs;
                } else {

                    // Set file attributes
                    if( ! ::SetFileAttributes(strFilePath.c_str(),FILE_ATTRIBUTE_NORMAL) ) {
                        std::cout << "!ERROR!: [[" << strFilePath.c_str() << "]]\n";
                        return ::GetLastError();
                    }

                    // Delete file
                    if ( ! ::DeleteFile(strFilePath.c_str()) ) {
                        std::cout << "!ERROR!: [[" << strFilePath.c_str() << "]]\n";
                        return ::GetLastError();
                    }

                    size_files.ull       += FileInformation.nFileSizeLow;
                    size_files.uint.high += FileInformation.nFileSizeHigh;

                    ++num_files;
                }
            }
        } while( ::FindNextFile(hFile,&FileInformation) );

        // Close handle
        ::FindClose( hFile  );
    }

    return 0;
}

unsigned long long num_files_total=0;
unsigned long long num_dirs_total=0;
unsigned long long total_size_files=0;

void my_del_directory( char* dir_name ) {
    int iRC = DeleteDirectory( dir_name );
    //int iRC=0;

    std::cout << "\"" << dir_name << "\""
             "\n    Folders: " << num_dirs
          << "\n    Files:   " << num_files
          << "\n    Size:    " << size_files.ull << " Bytes";
    if(iRC)
    {
        std::cout << "\n!ERROR!: " << iRC;
    }
    std::cout << "\n\n";

    num_dirs_total   += num_dirs;
    num_files_total  += num_files;
    total_size_files += size_files.ull;
    num_dirs  = 1;
    num_files = 0;
    size_files.ull = 0ULL;
    return;
}

int main( void )
{
    size_files.ull = 0ULL;

    my_del_directory( (char*)"C:\Windows\temp"      );
        // This will clear out the System temporary directory on windows systems

    std::cout << "\n\nResults" << "\nTotal Folders: " << num_dirs_total
                   << "\nTotal Files:   " << num_files_total
                   << "\nTotal Size:    " << total_size_files << " Bytes\n";

    return 0;
}
0
Jack Giffin

Pour linux (j'ai corrigé des bugs dans le code ci-dessus):

void remove_dir(char *path)
{
        struct dirent *entry = NULL;
        DIR *dir = NULL;
        dir = opendir(path);
        while(entry = readdir(dir))
        {   
                DIR *sub_dir = NULL;
                FILE *file = NULL;
                char* abs_path new char[256];
                 if ((*(entry->d_name) != '.') || ((strlen(entry->d_name) > 1) && (entry->d_name[1] != '.')))
                {   
                        sprintf(abs_path, "%s/%s", path, entry->d_name);
                        if(sub_dir = opendir(abs_path))
                        {   
                                closedir(sub_dir);
                                remove_dir(abs_path);
                        }   
                        else 
                        {   
                                if(file = fopen(abs_path, "r"))
                                {   
                                        fclose(file);
                                        remove(abs_path);
                                }   
                        }   
                }
                delete[] abs_path;   
        }   
        remove(path);
}

Pour les fenêtres:

void remove_dir(const wchar_t* folder)
{
    std::wstring search_path = std::wstring(folder) + _T("/*.*");
    std::wstring s_p = std::wstring(folder) + _T("/");
    WIN32_FIND_DATA fd;
    HANDLE hFind = ::FindFirstFile(search_path.c_str(), &fd);
    if (hFind != INVALID_HANDLE_VALUE) {
        do {
            if (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
                if (wcscmp(fd.cFileName, _T(".")) != 0 && wcscmp(fd.cFileName, _T("..")) != 0)
                {
                    remove_dir((wchar_t*)(s_p + fd.cFileName).c_str());
                }
            }
            else {
                DeleteFile((s_p + fd.cFileName).c_str());
            }
        } while (::FindNextFile(hFind, &fd));
        ::FindClose(hFind);
        _wrmdir(folder);
    }
}
0

//Pour les fenêtres:

#include <direct.h>


if(_rmdir("FILEPATHHERE") != -1)
{
  //success     
} else {
  //failure
}
0
JP_