2 Copyright (C) 2009-2011 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
22 #include "signature.h"
23 SIGNATURE_CHECK (pipe2, int, (int[2], int));
28 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
29 /* Get declarations of the Win32 API functions. */
30 # define WIN32_LEAN_AND_MEAN
34 #include "binary-io.h"
36 #if GNULIB_NONBLOCKING
37 # include "nonblocking.h"
40 /* Return true if FD is open. */
44 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
45 /* On Win32, the initial state of unassigned standard file
46 descriptors is that they are open but point to an
47 INVALID_HANDLE_VALUE, and there is no fcntl. */
48 return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
51 # error Please port fcntl to your platform
53 return 0 <= fcntl (fd, F_GETFL);
57 /* Return true if FD is not inherited to child processes. */
61 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
62 HANDLE h = (HANDLE) _get_osfhandle (fd);
64 ASSERT (GetHandleInformation (h, &flags));
65 return (flags & HANDLE_FLAG_INHERIT) == 0;
68 ASSERT ((flags = fcntl (fd, F_GETFD)) >= 0);
69 return (flags & FD_CLOEXEC) != 0;
73 #if ! GNULIB_NONBLOCKING
75 get_nonblocking_flag (int fd)
77 # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
81 # error Please port fcntl to your platform
84 ASSERT ((flags = fcntl (fd, F_GETFL)) >= 0);
85 return (flags & O_NONBLOCK) != 0;
96 for (use_nonblocking = 0; use_nonblocking <= !!O_NONBLOCK; use_nonblocking++)
97 for (use_cloexec = 0; use_cloexec <= !!O_CLOEXEC; use_cloexec++)
104 o_flags |= O_NONBLOCK;
106 o_flags |= O_CLOEXEC;
110 ASSERT (pipe2 (fd, o_flags) >= 0);
113 ASSERT (fd[0] != fd[1]);
114 ASSERT (is_open (fd[0]));
115 ASSERT (is_open (fd[1]));
118 ASSERT (is_cloexec (fd[0]));
119 ASSERT (is_cloexec (fd[1]));
123 ASSERT (!is_cloexec (fd[0]));
124 ASSERT (!is_cloexec (fd[1]));
128 ASSERT (get_nonblocking_flag (fd[0]) == 1);
129 ASSERT (get_nonblocking_flag (fd[1]) == 1);
133 ASSERT (get_nonblocking_flag (fd[0]) == 0);
134 ASSERT (get_nonblocking_flag (fd[1]) == 0);
137 ASSERT (close (fd[0]) == 0);
138 ASSERT (close (fd[1]) == 0);