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 (pipe, int, (int[2]));
28 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
29 /* Get declarations of the Win32 API functions. */
30 # define WIN32_LEAN_AND_MEAN
32 /* Get _get_osfhandle. */
33 # include "msvc-nothrow.h"
36 #include "binary-io.h"
39 /* Return true if FD is open. */
43 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
44 /* On Win32, the initial state of unassigned standard file
45 descriptors is that they are open but point to an
46 INVALID_HANDLE_VALUE, and there is no fcntl. */
47 return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
50 # error Please port fcntl to your platform
52 return 0 <= fcntl (fd, F_GETFL);
56 /* Return true if FD is not inherited to child processes. */
60 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
61 HANDLE h = (HANDLE) _get_osfhandle (fd);
63 ASSERT (GetHandleInformation (h, &flags));
64 return (flags & HANDLE_FLAG_INHERIT) == 0;
67 ASSERT ((flags = fcntl (fd, F_GETFD)) >= 0);
68 return (flags & FD_CLOEXEC) != 0;
72 /* Return true if FD is in non-blocking mode. */
74 is_nonblocking (int fd)
76 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
77 /* We don't use the non-blocking mode for sockets here. */
81 ASSERT ((flags = fcntl (fd, F_GETFL)) >= 0);
82 return (flags & O_NONBLOCK) != 0;
93 ASSERT (pipe (fd) >= 0);
96 ASSERT (fd[0] != fd[1]);
97 ASSERT (is_open (fd[0]));
98 ASSERT (is_open (fd[1]));
99 ASSERT (!is_cloexec (fd[0]));
100 ASSERT (!is_cloexec (fd[1]));
101 ASSERT (!is_nonblocking (fd[0]));
102 ASSERT (!is_nonblocking (fd[1]));