diff options
Diffstat (limited to 'gnulib-tests/test-pipe.c')
-rw-r--r-- | gnulib-tests/test-pipe.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/gnulib-tests/test-pipe.c b/gnulib-tests/test-pipe.c new file mode 100644 index 0000000..36ff480 --- /dev/null +++ b/gnulib-tests/test-pipe.c @@ -0,0 +1,108 @@ +/* Test of pipe. + 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 (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; +} |