148 lines
3.6 KiB
C
148 lines
3.6 KiB
C
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/* Test of pipe2.
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Copyright (C) 2009-2021 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <unistd.h>
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#include "signature.h"
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SIGNATURE_CHECK (pipe2, int, (int[2], int));
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#include <fcntl.h>
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#include <stdbool.h>
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#if defined _WIN32 && ! defined __CYGWIN__
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/* Get declarations of the native Windows API functions. */
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# define WIN32_LEAN_AND_MEAN
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# include <windows.h>
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/* Get _get_osfhandle. */
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# if GNULIB_MSVC_NOTHROW
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# include "msvc-nothrow.h"
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# else
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# include <io.h>
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# endif
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#endif
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#include "binary-io.h"
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#include "macros.h"
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#if GNULIB_NONBLOCKING
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# include "nonblocking.h"
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#endif
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/* Return true if FD is open. */
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static bool
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is_open (int fd)
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{
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#if defined _WIN32 && ! defined __CYGWIN__
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/* On native Windows, the initial state of unassigned standard file
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descriptors is that they are open but point to an
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INVALID_HANDLE_VALUE, and there is no fcntl. */
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return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
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#else
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# ifndef F_GETFL
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# error Please port fcntl to your platform
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# endif
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return 0 <= fcntl (fd, F_GETFL);
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#endif
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}
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/* Return true if FD is not inherited to child processes. */
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static bool
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is_cloexec (int fd)
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{
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#if defined _WIN32 && ! defined __CYGWIN__
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HANDLE h = (HANDLE) _get_osfhandle (fd);
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DWORD flags;
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ASSERT (GetHandleInformation (h, &flags));
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return (flags & HANDLE_FLAG_INHERIT) == 0;
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#else
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int flags;
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ASSERT ((flags = fcntl (fd, F_GETFD)) >= 0);
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return (flags & FD_CLOEXEC) != 0;
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#endif
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}
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#if ! GNULIB_NONBLOCKING
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static int
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get_nonblocking_flag (int fd)
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{
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# if defined _WIN32 && ! defined __CYGWIN__
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return 0;
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# else
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# ifndef F_GETFL
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# error Please port fcntl to your platform
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# endif
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int flags;
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ASSERT ((flags = fcntl (fd, F_GETFL)) >= 0);
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return (flags & O_NONBLOCK) != 0;
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# endif
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}
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#endif
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int
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main ()
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{
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int use_nonblocking;
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int use_cloexec;
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for (use_nonblocking = 0; use_nonblocking <= !!O_NONBLOCK; use_nonblocking++)
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for (use_cloexec = 0; use_cloexec <= !!O_CLOEXEC; use_cloexec++)
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{
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int o_flags;
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int fd[2];
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o_flags = 0;
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if (use_nonblocking)
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o_flags |= O_NONBLOCK;
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if (use_cloexec)
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o_flags |= O_CLOEXEC;
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fd[0] = -1;
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fd[1] = -1;
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ASSERT (pipe2 (fd, o_flags) >= 0);
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ASSERT (fd[0] >= 0);
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ASSERT (fd[1] >= 0);
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ASSERT (fd[0] != fd[1]);
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ASSERT (is_open (fd[0]));
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ASSERT (is_open (fd[1]));
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if (use_cloexec)
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{
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ASSERT (is_cloexec (fd[0]));
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ASSERT (is_cloexec (fd[1]));
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}
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else
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{
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ASSERT (!is_cloexec (fd[0]));
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ASSERT (!is_cloexec (fd[1]));
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}
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if (use_nonblocking)
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{
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ASSERT (get_nonblocking_flag (fd[0]) == 1);
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ASSERT (get_nonblocking_flag (fd[1]) == 1);
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}
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else
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{
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ASSERT (get_nonblocking_flag (fd[0]) == 0);
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ASSERT (get_nonblocking_flag (fd[1]) == 0);
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}
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ASSERT (close (fd[0]) == 0);
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ASSERT (close (fd[1]) == 0);
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}
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return 0;
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}
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