디렉터리에 파일 나열

#include <windows.h>
#include <stdio.h>
#include <strsafe.h>
#pragma comment(lib, "User32.lib")
 
void DisplayErrorBox(LPTSTR lpszFunction);
 
int main(int argc, char *argv[])
{
    WIN32_FIND_DATA ffd;
    LARGE_INTEGER filesize;
    char szDir[MAX_PATH];
    size_t length_of_arg;
    HANDLE hFind = INVALID_HANDLE_VALUE;
    DWORD dwError = 0;
 
    // If the directory is not specified as a command-line argument,
    // print usage.
    if (argc != 2)
    {
        printf("\nUsage: %s <directory name>\n", argv[0]);
        return (-1);
    }
 
    // Check that the input path plus 3 is not longer than MAX_PATH.
    // Three characters are for the "\*" plus NULL appended below.
    StringCchLength(argv[1], MAX_PATH, &length_of_arg);
 
    if (length_of_arg > (MAX_PATH - 3))
    {
        printf("\nDirectory path is too long.\n");
        return (-1);
    }
 
    printf("\nTarget directory is %s\n\n", argv[1]);
 
    // Prepare string for use with FindFile functions.  First, copy the
    // string to a buffer, then append '\*' to the directory name.
    StringCchCopy(szDir, MAX_PATH, argv[1]);
    StringCchCat(szDir, MAX_PATH, "\\*");
 
    // Find the first file in the directory.
    hFind = FindFirstFile(szDir, &ffd);
 
    if (INVALID_HANDLE_VALUE == hFind)
    {
        DisplayErrorBox((LPTSTR)"FindFirstFile");
        return dwError;
    }
 
    // List all the files in the directory with some info about them.
    do
    {
        if (ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
        {
            printf("  %s   <DIR>\n", ffd.cFileName);
        }
        else
        {
            filesize.LowPart = ffd.nFileSizeLow;
            filesize.HighPart = ffd.nFileSizeHigh;
            printf(" %s %ld bytes\n", ffd.cFileName, filesize.QuadPart);
        }
    } while (FindNextFile(hFind, &ffd) != 0);
 
    dwError = GetLastError();
    if (dwError != ERROR_NO_MORE_FILES)
        DisplayErrorBox((LPTSTR)"FindFirstFile");
 
    FindClose(hFind);
    return dwError;
}
 
 
void DisplayErrorBox(LPTSTR lpszFunction)
{
    // Retrieve the system error message for the last-error code
    LPVOID lpMsgBuf;
    LPVOID lpDisplayBuf;
    DWORD dw = GetLastError();
 
    FormatMessage(
        FORMAT_MESSAGE_ALLOCATE_BUFFER |
        FORMAT_MESSAGE_FROM_SYSTEM |
        FORMAT_MESSAGE_IGNORE_INSERTS,
        NULL,
        dw,
        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
        (LPTSTR)&lpMsgBuf,
        0, NULL);
 
    // Display the error message and clean up
 
    lpDisplayBuf = (LPVOID)LocalAlloc(LMEM_ZEROINIT,
        (lstrlen((LPCTSTR)lpMsgBuf) + lstrlen((LPCTSTR)lpszFunction) + 40) * sizeof(char));
    StringCchPrintf((LPTSTR)lpDisplayBuf,
        LocalSize(lpDisplayBuf) / sizeof(char),
        "%s failed with error %d: %s", lpszFunction, dw, lpMsgBuf);
    MessageBox(NULL, (LPCTSTR)lpDisplayBuf, "Error", MB_OK);
 
    LocalFree(lpMsgBuf);
    LocalFree(lpDisplayBuf);
}

 

출처

https://learn.microsoft.com/ko-kr/windows/win32/fileio/listing-the-files-in-a-directory