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-rw-r--r--tests/test-pipe.c108
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diff --git a/tests/test-pipe.c b/tests/test-pipe.c
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+/* Test of pipe.
+ Copyright (C) 2009-2022 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, see <https://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (pipe, int, (int[2]));
+
+#include <fcntl.h>
+#include <stdbool.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Get declarations of the native Windows API functions. */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+/* Get _get_osfhandle. */
+# if GNULIB_MSVC_NOTHROW
+# include "msvc-nothrow.h"
+# else
+# include <io.h>
+# endif
+#endif
+
+#include "binary-io.h"
+#include "macros.h"
+
+/* Return true if FD is open. */
+static bool
+is_open (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+ /* On native Windows, the initial state of unassigned standard file
+ descriptors is that they are open but point to an
+ INVALID_HANDLE_VALUE, and there is no fcntl. */
+ return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
+#else
+# ifndef F_GETFL
+# error Please port fcntl to your platform
+# endif
+ return 0 <= fcntl (fd, F_GETFL);
+#endif
+}
+
+/* Return true if FD is not inherited to child processes. */
+static bool
+is_cloexec (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+ HANDLE h = (HANDLE) _get_osfhandle (fd);
+ DWORD flags;
+ ASSERT (GetHandleInformation (h, &flags));
+ return (flags & HANDLE_FLAG_INHERIT) == 0;
+#else
+ int flags;
+ ASSERT ((flags = fcntl (fd, F_GETFD)) >= 0);
+ return (flags & FD_CLOEXEC) != 0;
+#endif
+}
+
+/* Return true if FD is in non-blocking mode. */
+static bool
+is_nonblocking (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+ /* We don't use the non-blocking mode for sockets here. */
+ return 0;
+#else
+ int flags;
+ ASSERT ((flags = fcntl (fd, F_GETFL)) >= 0);
+ return (flags & O_NONBLOCK) != 0;
+#endif
+}
+
+int
+main ()
+{
+ int fd[2];
+
+ fd[0] = -1;
+ fd[1] = -1;
+ ASSERT (pipe (fd) >= 0);
+ ASSERT (fd[0] >= 0);
+ ASSERT (fd[1] >= 0);
+ ASSERT (fd[0] != fd[1]);
+ ASSERT (is_open (fd[0]));
+ ASSERT (is_open (fd[1]));
+ ASSERT (!is_cloexec (fd[0]));
+ ASSERT (!is_cloexec (fd[1]));
+ ASSERT (!is_nonblocking (fd[0]));
+ ASSERT (!is_nonblocking (fd[1]));
+
+ return 0;
+}