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Diffstat (limited to 'tests/test-fcntl.c')
| -rw-r--r-- | tests/test-fcntl.c | 409 |
1 files changed, 409 insertions, 0 deletions
diff --git a/tests/test-fcntl.c b/tests/test-fcntl.c new file mode 100644 index 0000000..058f30e --- /dev/null +++ b/tests/test-fcntl.c @@ -0,0 +1,409 @@ +/* Test of fcntl(2). + Copyright (C) 2009-2013 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> + +/* Specification. */ +#include <fcntl.h> + +#include "signature.h" +SIGNATURE_CHECK (fcntl, int, (int, int, ...)); + +/* Helpers. */ +#include <errno.h> +#include <stdarg.h> +#include <stdbool.h> +#include <unistd.h> + +#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 "binary-io.h" +#include "macros.h" + +#if !O_BINARY +# define setmode(f,m) zero () +static int zero (void) { return 0; } +#endif + +/* Return true if FD is open. */ +static bool +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 +} + +/* Return true if FD is open and inheritable across exec/spawn. */ +static bool +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 false; + 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 non-zero 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 = setmode (fd, O_BINARY); + setmode (fd, value); + return mode == value; +} + +/* Since native fcntl can have more supported operations than our + replacement is aware of, and since various operations assign + different types to the vararg argument, a wrapper around fcntl must + be able to pass a vararg of unknown type on through to the original + fcntl. Make sure that this works properly: func1 behaves like the + original fcntl interpreting the vararg as an int or a pointer to a + struct, and func2 behaves like rpl_fcntl that doesn't know what + type to forward. */ +struct dummy_struct +{ + long filler; + int value; +}; +static int +func1 (int a, ...) +{ + va_list arg; + int i; + va_start (arg, a); + if (a < 4) + i = va_arg (arg, int); + else + { + struct dummy_struct *s = va_arg (arg, struct dummy_struct *); + i = s->value; + } + va_end (arg); + return i; +} +static int +func2 (int a, ...) +{ + va_list arg; + void *p; + va_start (arg, a); + p = va_arg (arg, void *); + va_end (arg); + return func1 (a, p); +} + +/* Ensure that all supported fcntl actions are distinct, and + usable in preprocessor expressions. */ +static void +check_flags (void) +{ + switch (0) + { + case F_DUPFD: +#if F_DUPFD +#endif + + case F_DUPFD_CLOEXEC: +#if F_DUPFD_CLOEXEC +#endif + + case F_GETFD: +#if F_GETFD +#endif + +#ifdef F_SETFD + case F_SETFD: +# if F_SETFD +# endif +#endif + +#ifdef F_GETFL + case F_GETFL: +# if F_GETFL +# endif +#endif + +#ifdef F_SETFL + case F_SETFL: +# if F_SETFL +# endif +#endif + +#ifdef F_GETOWN + case F_GETOWN: +# if F_GETOWN +# endif +#endif + +#ifdef F_SETOWN + case F_SETOWN: +# if F_SETOWN +# endif +#endif + +#ifdef F_GETLK + case F_GETLK: +# if F_GETLK +# endif +#endif + +#ifdef F_SETLK + case F_SETLK: +# if F_SETLK +# endif +#endif + +#ifdef F_SETLKW + case F_SETLKW: +# if F_SETLKW +# endif +#endif + + ; + } +} + +int +main (void) +{ + const char *file = "test-fcntl.tmp"; + int fd; + int bad_fd = getdtablesize (); + + /* Sanity check that rpl_fcntl is likely to work. */ + ASSERT (func2 (1, 2) == 2); + ASSERT (func2 (2, -2) == -2); + ASSERT (func2 (3, 0x80000000) == 0x80000000); + { + struct dummy_struct s = { 0L, 4 }; + ASSERT (func2 (4, &s) == 4); + } + check_flags (); + + /* Assume std descriptors were provided by invoker, and ignore fds + that might have been inherited. */ + fd = creat (file, 0600); + ASSERT (STDERR_FILENO < fd); + close (fd + 1); + close (fd + 2); + + /* For F_DUPFD*, the source must be valid. */ + errno = 0; + ASSERT (fcntl (-1, F_DUPFD, 0) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (fd + 1, F_DUPFD, 0) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (bad_fd, F_DUPFD, 0) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (-1, F_DUPFD_CLOEXEC, 0) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (fd + 1, F_DUPFD_CLOEXEC, 0) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (bad_fd, F_DUPFD_CLOEXEC, 0) == -1); + ASSERT (errno == EBADF); + + /* For F_DUPFD*, the destination must be valid. */ + errno = 0; + ASSERT (fcntl (fd, F_DUPFD, -1) == -1); + ASSERT (errno == EINVAL); + errno = 0; + ASSERT (fcntl (fd, F_DUPFD, bad_fd) == -1); + ASSERT (errno == EINVAL); + errno = 0; + ASSERT (fcntl (fd, F_DUPFD_CLOEXEC, -1) == -1); + ASSERT (errno == EINVAL); + errno = 0; + ASSERT (fcntl (fd, F_DUPFD_CLOEXEC, bad_fd) == -1); + ASSERT (errno == EINVAL); + + /* For F_DUPFD*, check for correct inheritance, as well as + preservation of text vs. binary. */ + setmode (fd, O_BINARY); + ASSERT (is_open (fd)); + ASSERT (!is_open (fd + 1)); + ASSERT (!is_open (fd + 2)); + ASSERT (is_inheritable (fd)); + ASSERT (is_mode (fd, O_BINARY)); + + ASSERT (fcntl (fd, F_DUPFD, fd) == fd + 1); + ASSERT (is_open (fd)); + ASSERT (is_open (fd + 1)); + ASSERT (!is_open (fd + 2)); + ASSERT (is_inheritable (fd + 1)); + ASSERT (is_mode (fd, O_BINARY)); + ASSERT (is_mode (fd + 1, O_BINARY)); + ASSERT (close (fd + 1) == 0); + + ASSERT (fcntl (fd, F_DUPFD_CLOEXEC, fd + 2) == fd + 2); + ASSERT (is_open (fd)); + ASSERT (!is_open (fd + 1)); + ASSERT (is_open (fd + 2)); + ASSERT (is_inheritable (fd)); + ASSERT (!is_inheritable (fd + 2)); + ASSERT (is_mode (fd, O_BINARY)); + ASSERT (is_mode (fd + 2, O_BINARY)); + ASSERT (close (fd) == 0); + + setmode (fd + 2, O_TEXT); + ASSERT (fcntl (fd + 2, F_DUPFD, fd + 1) == fd + 1); + ASSERT (!is_open (fd)); + ASSERT (is_open (fd + 1)); + ASSERT (is_open (fd + 2)); + ASSERT (is_inheritable (fd + 1)); + ASSERT (!is_inheritable (fd + 2)); + ASSERT (is_mode (fd + 1, O_TEXT)); + ASSERT (is_mode (fd + 2, O_TEXT)); + ASSERT (close (fd + 1) == 0); + + ASSERT (fcntl (fd + 2, F_DUPFD_CLOEXEC, 0) == fd); + ASSERT (is_open (fd)); + ASSERT (!is_open (fd + 1)); + ASSERT (is_open (fd + 2)); + ASSERT (!is_inheritable (fd)); + ASSERT (!is_inheritable (fd + 2)); + ASSERT (is_mode (fd, O_TEXT)); + ASSERT (is_mode (fd + 2, O_TEXT)); + ASSERT (close (fd + 2) == 0); + + /* Test F_GETFD on invalid file descriptors. */ + errno = 0; + ASSERT (fcntl (-1, F_GETFD) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (fd + 1, F_GETFD) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (bad_fd, F_GETFD) == -1); + ASSERT (errno == EBADF); + + /* Test F_GETFD, the FD_CLOEXEC bit. */ + { + int result = fcntl (fd, F_GETFD); + ASSERT (0 <= result); + ASSERT ((result & FD_CLOEXEC) == FD_CLOEXEC); + ASSERT (dup (fd) == fd + 1); + result = fcntl (fd + 1, F_GETFD); + ASSERT (0 <= result); + ASSERT ((result & FD_CLOEXEC) == 0); + ASSERT (close (fd + 1) == 0); + } + +#ifdef F_SETFD + /* Test F_SETFD on invalid file descriptors. */ + errno = 0; + ASSERT (fcntl (-1, F_SETFD, 0) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (fd + 1, F_SETFD, 0) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (bad_fd, F_SETFD, 0) == -1); + ASSERT (errno == EBADF); +#endif + +#ifdef F_GETFL + /* Test F_GETFL on invalid file descriptors. */ + errno = 0; + ASSERT (fcntl (-1, F_GETFL) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (fd + 1, F_GETFL) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (bad_fd, F_GETFL) == -1); + ASSERT (errno == EBADF); +#endif + +#ifdef F_SETFL + /* Test F_SETFL on invalid file descriptors. */ + errno = 0; + ASSERT (fcntl (-1, F_SETFL, 0) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (fd + 1, F_SETFL, 0) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (bad_fd, F_SETFL, 0) == -1); + ASSERT (errno == EBADF); +#endif + +#ifdef F_GETOWN + /* Test F_GETOWN on invalid file descriptors. */ + errno = 0; + ASSERT (fcntl (-1, F_GETOWN) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (fd + 1, F_GETOWN) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (bad_fd, F_GETOWN) == -1); + ASSERT (errno == EBADF); +#endif + +#ifdef F_SETOWN + /* Test F_SETFL on invalid file descriptors. */ + errno = 0; + ASSERT (fcntl (-1, F_SETOWN, 0) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (fd + 1, F_SETOWN, 0) == -1); + ASSERT (errno == EBADF); + errno = 0; + ASSERT (fcntl (bad_fd, F_SETOWN, 0) == -1); + ASSERT (errno == EBADF); +#endif + + /* Cleanup. */ + ASSERT (close (fd) == 0); + ASSERT (unlink (file) == 0); + + return 0; +} |