diff options
Diffstat (limited to 'gl/tests/test-dup2.c')
| -rw-r--r-- | gl/tests/test-dup2.c | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/gl/tests/test-dup2.c b/gl/tests/test-dup2.c deleted file mode 100644 index c7cb9656e9..0000000000 --- a/gl/tests/test-dup2.c +++ /dev/null @@ -1,218 +0,0 @@ -/* Test duplicating file descriptors. - Copyright (C) 2009-2014 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 of the License, 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 <http://www.gnu.org/licenses/>. */ - -/* Written by Eric Blake <ebb9@byu.net>, 2009. */ - -#include <config.h> - -#include <unistd.h> - -#include "signature.h" -SIGNATURE_CHECK (dup2, int, (int, int)); - -#include <errno.h> -#include <fcntl.h> - -#if HAVE_SYS_RESOURCE_H -# include <sys/resource.h> -#endif - -#include "binary-io.h" - -#if GNULIB_TEST_CLOEXEC -# include "cloexec.h" -#endif - -#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ -/* Get declarations of the native Windows API functions. */ -# define WIN32_LEAN_AND_MEAN -# include <windows.h> -/* Get _get_osfhandle. */ -# include "msvc-nothrow.h" -#endif - -#include "macros.h" - -/* Return non-zero if FD is open. */ -static int -is_open (int fd) -{ -#if (defined _WIN32 || 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 -} - -#if GNULIB_TEST_CLOEXEC -/* Return non-zero if FD is open and inheritable across exec/spawn. */ -static int -is_inheritable (int fd) -{ -# if (defined _WIN32 || 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. */ - HANDLE h = (HANDLE) _get_osfhandle (fd); - DWORD flags; - if (h == INVALID_HANDLE_VALUE || GetHandleInformation (h, &flags) == 0) - return 0; - return (flags & HANDLE_FLAG_INHERIT) != 0; -# else -# ifndef F_GETFD -# error Please port fcntl to your platform -# endif - int i = fcntl (fd, F_GETFD); - return 0 <= i && (i & FD_CLOEXEC) == 0; -# endif -} -#endif /* GNULIB_TEST_CLOEXEC */ - -#if !O_BINARY -# define setmode(f,m) zero () -static int zero (void) { return 0; } -#endif - -/* Return non-zero if FD is open in the given MODE, which is either - O_TEXT or O_BINARY. */ -static int -is_mode (int fd, int mode) -{ - int value = setmode (fd, O_BINARY); - setmode (fd, value); - return mode == value; -} - -int -main (void) -{ - const char *file = "test-dup2.tmp"; - char buffer[1]; - int bad_fd = getdtablesize (); - int fd = open (file, O_CREAT | O_TRUNC | O_RDWR, 0600); - - /* Assume std descriptors were provided by invoker. */ - ASSERT (STDERR_FILENO < fd); - ASSERT (is_open (fd)); - /* Ignore any other fd's leaked into this process. */ - close (fd + 1); - close (fd + 2); - ASSERT (!is_open (fd + 1)); - ASSERT (!is_open (fd + 2)); - - /* Assigning to self must be a no-op. */ - ASSERT (dup2 (fd, fd) == fd); - ASSERT (is_open (fd)); - - /* The source must be valid. */ - errno = 0; - ASSERT (dup2 (-1, fd) == -1); - ASSERT (errno == EBADF); - close (99); - errno = 0; - ASSERT (dup2 (99, fd) == -1); - ASSERT (errno == EBADF); - errno = 0; - ASSERT (dup2 (AT_FDCWD, fd) == -1); - ASSERT (errno == EBADF); - ASSERT (is_open (fd)); - - /* If the source is not open, then the destination is unaffected. */ - errno = 0; - ASSERT (dup2 (fd + 1, fd + 1) == -1); - ASSERT (errno == EBADF); - ASSERT (!is_open (fd + 1)); - errno = 0; - ASSERT (dup2 (fd + 1, fd) == -1); - ASSERT (errno == EBADF); - ASSERT (is_open (fd)); - - /* The destination must be valid. */ - errno = 0; - ASSERT (dup2 (fd, -2) == -1); - ASSERT (errno == EBADF); - if (bad_fd > 256) - { - ASSERT (dup2 (fd, 255) == 255); - ASSERT (dup2 (fd, 256) == 256); - ASSERT (close (255) == 0); - ASSERT (close (256) == 0); - } - ASSERT (dup2 (fd, bad_fd - 1) == bad_fd - 1); - ASSERT (close (bad_fd - 1) == 0); - errno = 0; - ASSERT (dup2 (fd, bad_fd) == -1); - ASSERT (errno == EBADF); - - /* Using dup2 can skip fds. */ - ASSERT (dup2 (fd, fd + 2) == fd + 2); - ASSERT (is_open (fd)); - ASSERT (!is_open (fd + 1)); - ASSERT (is_open (fd + 2)); - - /* Verify that dup2 closes the previous occupant of a fd. */ - ASSERT (open ("/dev/null", O_WRONLY, 0600) == fd + 1); - ASSERT (dup2 (fd + 1, fd) == fd); - ASSERT (close (fd + 1) == 0); - ASSERT (write (fd, "1", 1) == 1); - ASSERT (dup2 (fd + 2, fd) == fd); - ASSERT (lseek (fd, 0, SEEK_END) == 0); - ASSERT (write (fd + 2, "2", 1) == 1); - ASSERT (lseek (fd, 0, SEEK_SET) == 0); - ASSERT (read (fd, buffer, 1) == 1); - ASSERT (*buffer == '2'); - -#if GNULIB_TEST_CLOEXEC - /* Any new fd created by dup2 must not be cloexec. */ - ASSERT (close (fd + 2) == 0); - ASSERT (dup_cloexec (fd) == fd + 1); - ASSERT (!is_inheritable (fd + 1)); - ASSERT (dup2 (fd + 1, fd + 1) == fd + 1); - ASSERT (!is_inheritable (fd + 1)); - ASSERT (dup2 (fd + 1, fd + 2) == fd + 2); - ASSERT (!is_inheritable (fd + 1)); - ASSERT (is_inheritable (fd + 2)); - errno = 0; - ASSERT (dup2 (fd + 1, -1) == -1); - ASSERT (errno == EBADF); - ASSERT (!is_inheritable (fd + 1)); -#endif - - /* On systems that distinguish between text and binary mode, dup2 - reuses the mode of the source. */ - setmode (fd, O_BINARY); - ASSERT (is_mode (fd, O_BINARY)); - ASSERT (dup2 (fd, fd + 1) == fd + 1); - ASSERT (is_mode (fd + 1, O_BINARY)); - setmode (fd, O_TEXT); - ASSERT (is_mode (fd, O_TEXT)); - ASSERT (dup2 (fd, fd + 1) == fd + 1); - ASSERT (is_mode (fd + 1, O_TEXT)); - - /* Clean up. */ - ASSERT (close (fd + 2) == 0); - ASSERT (close (fd + 1) == 0); - ASSERT (close (fd) == 0); - ASSERT (unlink (file) == 0); - - return 0; -} |