2 Copyright (C) 2009 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 #define ASSERT(expr) \
41 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
48 /* Return true if FD is open. */
52 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
53 /* On Win32, the initial state of unassigned standard file
54 descriptors is that they are open but point to an
55 INVALID_HANDLE_VALUE, and there is no fcntl. */
56 return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
59 # error Please port fcntl to your platform
61 return 0 <= fcntl (fd, F_GETFL);
65 /* Return true if FD is not inherited to child processes. */
69 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
70 HANDLE h = (HANDLE) _get_osfhandle (fd);
72 ASSERT (GetHandleInformation (h, &flags));
73 return (flags & HANDLE_FLAG_INHERIT) == 0;
76 ASSERT ((flags = fcntl (fd, F_GETFD)) >= 0);
77 return (flags & FD_CLOEXEC) != 0;
81 /* Return true if FD is in non-blocking mode. */
83 is_nonblocking (int fd)
85 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
86 /* We don't use the non-blocking mode for sockets here. */
90 ASSERT ((flags = fcntl (fd, F_GETFL)) >= 0);
91 return (flags & O_NONBLOCK) != 0;
101 #if !((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
102 for (use_nonblocking = 0; use_nonblocking <= 1; use_nonblocking++)
106 #if defined O_CLOEXEC
107 for (use_cloexec = 0; use_cloexec <= 1; use_cloexec++)
116 #if !((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
118 o_flags |= O_NONBLOCK;
120 #if defined O_CLOEXEC
122 o_flags |= O_CLOEXEC;
127 ASSERT (pipe2 (fd, o_flags) >= 0);
130 ASSERT (fd[0] != fd[1]);
131 ASSERT (is_open (fd[0]) >= 0);
132 ASSERT (is_open (fd[1]) >= 0);
135 ASSERT (is_cloexec (fd[0]));
136 ASSERT (is_cloexec (fd[1]));
140 ASSERT (!is_cloexec (fd[0]));
141 ASSERT (!is_cloexec (fd[1]));
145 ASSERT (is_nonblocking (fd[0]));
146 ASSERT (is_nonblocking (fd[1]));
150 ASSERT (!is_nonblocking (fd[0]));
151 ASSERT (!is_nonblocking (fd[1]));