43 lines
1.9 KiB
C
43 lines
1.9 KiB
C
/**************************************************************************/
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/* */
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/* OCaml */
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/* */
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/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
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/* */
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/* Copyright 1996 Institut National de Recherche en Informatique et */
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/* en Automatique. */
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/* */
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/* All rights reserved. This file is distributed under the terms of */
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/* the GNU Lesser General Public License version 2.1, with the */
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/* special exception on linking described in the file LICENSE. */
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/* */
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/**************************************************************************/
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#include <caml/mlvalues.h>
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#include "unixsupport.h"
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CAMLprim value unix_dup2(value cloexec, value fd1, value fd2)
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{
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HANDLE oldh, newh;
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oldh = Handle_val(fd2);
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if (! DuplicateHandle(GetCurrentProcess(), Handle_val(fd1),
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GetCurrentProcess(), &newh,
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0L,
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unix_cloexec_p(cloexec) ? FALSE : TRUE,
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DUPLICATE_SAME_ACCESS)) {
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win32_maperr(GetLastError());
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return -1;
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}
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Handle_val(fd2) = newh;
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if (Descr_kind_val(fd2) == KIND_SOCKET)
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closesocket((SOCKET) oldh);
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else
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CloseHandle(oldh);
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Descr_kind_val(fd2) = Descr_kind_val(fd1);
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/* Reflect the dup2 on the CRT fds, if any */
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if (CRT_fd_val(fd1) != NO_CRT_FD || CRT_fd_val(fd2) != NO_CRT_FD)
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_dup2(win_CRT_fd_of_filedescr(fd1), win_CRT_fd_of_filedescr(fd2));
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return Val_unit;
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}
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