wimlib.net Git - wimlib/blob - tests/set_reparse_point.c

   1 #include <inttypes.h>
   2 #include <stdio.h>
   3 #include <windows.h>
   4
   5 static wchar_t *
   6 win32_error_string(DWORD err_code)
   7 {
   8         static wchar_t buf[1024];
   9         buf[0] = L'\0';
  10         FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err_code, 0,
  11                       buf, 1024, NULL);
  12         return buf;
  13 }
  14
  15 static void
  16 fail(const char *func, DWORD code)
  17 {
  18         fprintf(stderr, "%s (err 0x%08x: %ls)\n", func,
  19                 (unsigned int)code, win32_error_string(code));
  20         exit(1);
  21 }
  22
  23 int
  24 wmain(int argc, wchar_t **argv)
  25 {
  26         if (argc != 2) {
  27                 fprintf(stderr, "Usage: %ls FILE\n", argv[0]);
  28                 return 2;
  29         }
  30
  31         HANDLE h = CreateFile(argv[1],
  32                               GENERIC_WRITE,
  33                               FILE_SHARE_VALID_FLAGS,
  34                               NULL,
  35                               OPEN_EXISTING,
  36                               FILE_FLAG_BACKUP_SEMANTICS,
  37                               NULL);
  38         if (h == INVALID_HANDLE_VALUE)
  39                 fail("CreateFile", GetLastError());
  40
  41         uint8_t in[128];
  42         uint8_t *p = in;
  43         *(uint32_t *)p = 0x80000000; /* rptag */
  44         p += 4;
  45         *(uint16_t *)p = 80; /* rpdatalen */
  46         p += 2;
  47         *(uint16_t *)p = 0; /* rpreserved */
  48         p += 2;
  49         memset(p, 0, 80); /* rpdata */
  50         p += 80;
  51
  52         DWORD bytes_returned;
  53
  54         if (!DeviceIoControl(h, FSCTL_SET_REPARSE_POINT, in, p - in,
  55                              NULL, 0, &bytes_returned, NULL))
  56                 fail("DeviceIoControl", GetLastError());
  57
  58         CloseHandle(h);
  59
  60         return 0;
  61 }