lib/msvcrt/io/dup.c

   1 /* $Id$ */
   2 #include <windows.h>
   3 #include <msvcrt/io.h>
   4 #include <msvcrt/internal/file.h>
   5
   6
   7 /*
   8  * @implemented
   9  */
  10 int _dup(int handle)
  11 {
  12   HANDLE hFile;
  13   HANDLE hProcess = GetCurrentProcess();
  14   BOOL result;
  15   int fd;
  16
  17   hFile = _get_osfhandle(handle);
  18   if (hFile == INVALID_HANDLE_VALUE)
  19           return -1;
  20   result = DuplicateHandle(hProcess,
  21                            hFile,
  22                            hProcess,
  23                            &hFile,
  24                            0,
  25                            TRUE,
  26                            DUPLICATE_SAME_ACCESS);
  27   if (result == FALSE)
  28           return -1;
  29
  30   fd = __fileno_alloc(hFile, __fileno_getmode(handle));
  31   if (fd < 0)
  32   {
  33           CloseHandle(hFile);
  34   }
  35   return fd;
  36 }