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/***********************************************************************/
/* */
/* OCaml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. All rights reserved. This file is distributed */
/* under the terms of the GNU Library General Public License, with */
/* the special exception on linking described in file ../../LICENSE. */
/* */
/***********************************************************************/
#include <caml/mlvalues.h>
#include "unixsupport.h"
extern int _dup2(int, int);
CAMLprim value unix_dup2(value fd1, value fd2)
{
HANDLE oldh, newh;
oldh = Handle_val(fd2);
if (! DuplicateHandle(GetCurrentProcess(), Handle_val(fd1),
GetCurrentProcess(), &newh,
0L, TRUE, DUPLICATE_SAME_ACCESS)) {
win32_maperr(GetLastError());
return -1;
}
Handle_val(fd2) = newh;
if (Descr_kind_val(fd2) == KIND_SOCKET)
closesocket((SOCKET) oldh);
else
CloseHandle(oldh);
Descr_kind_val(fd2) = Descr_kind_val(fd1);
/* Reflect the dup2 on the CRT fds, if any */
if (CRT_fd_val(fd1) != NO_CRT_FD || CRT_fd_val(fd2) != NO_CRT_FD)
_dup2(win_CRT_fd_of_filedescr(fd1), win_CRT_fd_of_filedescr(fd2));
return Val_unit;
}
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