1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
/**************************************************************************/
/* */
/* 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 Lesser General Public License version 2.1, with the */
/* special exception on linking described in the file LICENSE. */
/* */
/**************************************************************************/
#define _GNU_SOURCE
#include <caml/mlvalues.h>
#include "unixsupport.h"
#include <fcntl.h>
CAMLprim value caml_unix_dup2(value cloexec, value fd1, value fd2)
{
if (Int_val(fd2) == Int_val(fd1)) {
/* In this case, dup3 fails and dup2 does nothing. */
/* Just apply the cloexec flag to fd2, if it is given. */
if (Is_some(cloexec)) {
if (Bool_val(Some_val(cloexec)))
caml_unix_set_cloexec(Int_val(fd2), "dup2", Nothing);
else
caml_unix_clear_cloexec(Int_val(fd2), "dup2", Nothing);
}
} else {
#ifdef HAS_DUP3
if (dup3(Int_val(fd1), Int_val(fd2),
caml_unix_cloexec_p(cloexec) ? O_CLOEXEC : 0) == -1)
caml_uerror("dup2", Nothing);
#else
if (dup2(Int_val(fd1), Int_val(fd2)) == -1) caml_uerror("dup2", Nothing);
if (caml_unix_cloexec_p(cloexec))
caml_unix_set_cloexec(Int_val(fd2), "dup2", Nothing);
#endif
}
return Val_unit;
}
|
