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/* Test of pipe2.
Copyright (C) 2009-2020 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 (pipe2, int, (int[2], int));
#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"
#if GNULIB_NONBLOCKING
# include "nonblocking.h"
#endif
/* 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
}
#if ! GNULIB_NONBLOCKING
static int
get_nonblocking_flag (int fd)
{
# if defined _WIN32 && ! defined __CYGWIN__
return 0;
# else
# ifndef F_GETFL
# error Please port fcntl to your platform
# endif
int flags;
ASSERT ((flags = fcntl (fd, F_GETFL)) >= 0);
return (flags & O_NONBLOCK) != 0;
# endif
}
#endif
int
main ()
{
int use_nonblocking;
int use_cloexec;
for (use_nonblocking = 0; use_nonblocking <= !!O_NONBLOCK; use_nonblocking++)
for (use_cloexec = 0; use_cloexec <= !!O_CLOEXEC; use_cloexec++)
{
int o_flags;
int fd[2];
o_flags = 0;
if (use_nonblocking)
o_flags |= O_NONBLOCK;
if (use_cloexec)
o_flags |= O_CLOEXEC;
fd[0] = -1;
fd[1] = -1;
ASSERT (pipe2 (fd, o_flags) >= 0);
ASSERT (fd[0] >= 0);
ASSERT (fd[1] >= 0);
ASSERT (fd[0] != fd[1]);
ASSERT (is_open (fd[0]));
ASSERT (is_open (fd[1]));
if (use_cloexec)
{
ASSERT (is_cloexec (fd[0]));
ASSERT (is_cloexec (fd[1]));
}
else
{
ASSERT (!is_cloexec (fd[0]));
ASSERT (!is_cloexec (fd[1]));
}
if (use_nonblocking)
{
ASSERT (get_nonblocking_flag (fd[0]) == 1);
ASSERT (get_nonblocking_flag (fd[1]) == 1);
}
else
{
ASSERT (get_nonblocking_flag (fd[0]) == 0);
ASSERT (get_nonblocking_flag (fd[1]) == 0);
}
ASSERT (close (fd[0]) == 0);
ASSERT (close (fd[1]) == 0);
}
return 0;
}
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