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Diffstat (limited to 'tests/test-dup-safer.c')
| -rw-r--r-- | tests/test-dup-safer.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/tests/test-dup-safer.c b/tests/test-dup-safer.c deleted file mode 100644 index ec2cb908..00000000 --- a/tests/test-dup-safer.c +++ /dev/null @@ -1,183 +0,0 @@ -/* Test that dup_safer leaves standard fds alone. - Copyright (C) 2009-2024 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 <https://www.gnu.org/licenses/>. */ - -/* Written by Eric Blake <ebb9@byu.net>, 2009. */ - -#include <config.h> - -#include "unistd--.h" - -#include <fcntl.h> -#include <errno.h> -#include <stdio.h> -#include <unistd.h> - -#include "binary-io.h" -#include "cloexec.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 - -#if !O_BINARY -# define set_binary_mode my_set_binary_mode -static int -set_binary_mode (_GL_UNUSED int fd, _GL_UNUSED int mode) -{ - return 0; -} -#endif - -/* This test intentionally closes stderr. So, we arrange to have fd 10 - (outside the range of interesting fd's during the test) set up to - duplicate the original stderr. */ - -#define BACKUP_STDERR_FILENO 10 -#define ASSERT_STREAM myerr -#include "macros.h" - -static FILE *myerr; - -/* 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 open and inheritable across exec/spawn. */ -static bool -is_inheritable (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. */ - 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 -} - -/* Return true if FD is open in the given MODE, which is either - O_TEXT or O_BINARY. */ -static bool -is_mode (int fd, int mode) -{ - int value = set_binary_mode (fd, O_BINARY); - set_binary_mode (fd, value); - return mode == value; -} - -#define witness "test-dup-safer.txt" - -int -main (void) -{ - int i; - int fd; - int bad_fd = getdtablesize (); - - /* We close fd 2 later, so save it in fd 10. */ - if (dup2 (STDERR_FILENO, BACKUP_STDERR_FILENO) != BACKUP_STDERR_FILENO - || (myerr = fdopen (BACKUP_STDERR_FILENO, "w")) == NULL) - return 2; - - /* Create file for later checks. */ - fd = creat (witness, 0600); - ASSERT (STDERR_FILENO < fd); - - /* Four iterations, with progressively more standard descriptors - closed. */ - for (i = -1; i <= STDERR_FILENO; i++) - { - if (0 <= i) - ASSERT (close (i) == 0); - - /* Detect errors. */ - errno = 0; - ASSERT (dup (-1) == -1); - ASSERT (errno == EBADF); - errno = 0; - ASSERT (dup (bad_fd) == -1); - ASSERT (errno == EBADF); - close (fd + 1); - errno = 0; - ASSERT (dup (fd + 1) == -1); - ASSERT (errno == EBADF); - - /* Preserve text vs. binary. */ - set_binary_mode (fd, O_BINARY); - ASSERT (dup (fd) == fd + 1); - ASSERT (is_open (fd + 1)); - ASSERT (is_inheritable (fd + 1)); - ASSERT (is_mode (fd + 1, O_BINARY)); - - ASSERT (close (fd + 1) == 0); - set_binary_mode (fd, O_TEXT); - ASSERT (dup (fd) == fd + 1); - ASSERT (is_open (fd + 1)); - ASSERT (is_inheritable (fd + 1)); - ASSERT (is_mode (fd + 1, O_TEXT)); - - /* Create cloexec copy. */ - ASSERT (close (fd + 1) == 0); - ASSERT (fd_safer_flag (dup_cloexec (fd), O_CLOEXEC) == fd + 1); - ASSERT (set_cloexec_flag (fd + 1, true) == 0); - ASSERT (is_open (fd + 1)); - ASSERT (!is_inheritable (fd + 1)); - ASSERT (close (fd) == 0); - - /* dup always creates inheritable copies. Also, check that - earliest slot past std fds is used. */ - ASSERT (dup (fd + 1) == fd); - ASSERT (is_open (fd)); - ASSERT (is_inheritable (fd)); - ASSERT (close (fd + 1) == 0); - } - - /* Cleanup. */ - ASSERT (close (fd) == 0); - ASSERT (unlink (witness) == 0); - - return test_exit_status; -} |