reactos/lib/msvcrt/io/dup.c

   1 /* $Id: dup.c,v 1.2 2002/05/07 22:31:25 hbirr Exp $ */
   2 #include <windows.h>
   3 #include <msvcrt/io.h>
   4 #include <msvcrt/internal/file.h>
   5
   6
   7 int _dup(int handle)
   8 {
   9   HANDLE hFile;
  10   HANDLE hProcess = GetCurrentProcess();
  11   BOOL result;
  12   int fd;
  13
  14   hFile = _get_osfhandle(handle);
  15   if (hFile == INVALID_HANDLE_VALUE)
  16           return -1;
  17   result = DuplicateHandle(hProcess,
  18                            hFile,
  19                            hProcess,
  20                            &hFile,
  21                            0,
  22                            TRUE,
  23                            DUPLICATE_SAME_ACCESS);
  24   if (result == FALSE)
  25           return -1;
  26
  27   fd = __fileno_alloc(hFile, __fileno_getmode(handle));
  28   if (fd < 0)
  29   {
  30           CloseHandle(hFile);
  31   }
  32   return fd;
  33 }