/* Checking macros for fcntl functions. Copyright (C) 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #ifndef _FCNTL_H # error "Never include directly; use instead." #endif /* Check that calls to open and openat with O_CREAT set have an appropriate third/fourth parameter. */ #ifndef __USE_FILE_OFFSET64 extern int __open_2 (__const char *__path, int __oflag) __nonnull ((1)); #else extern int __REDIRECT (__open_2, (__const char *__file, int __oflag), __open64_2) __nonnull ((1)); #endif #define open(fname, flags, ...) \ ({ int ___r; \ /* If the compiler complains about an invalid type, excess elements, etc \ in the initialization this means a parameter of the wrong type has \ been passed to open. */ \ int ___arr[] = { __VA_ARGS__ }; \ if (__builtin_constant_p (flags) && ((flags) & O_CREAT) != 0) \ { \ /* If the compiler complains about the size of this array type the \ mode parameter is missing since O_CREAT has been used. */ \ typedef int __open_missing_mode[((flags) & O_CREAT) != 0 \ ? ((long int) sizeof (___arr) \ - (long int) sizeof (int)) : 1]; \ } \ if (sizeof (___arr) == 0) \ { \ if (__builtin_constant_p (flags) && ((flags) & O_CREAT) == 0) \ ___r = open (fname, flags); \ else \ ___r = __open_2 (fname, flags); \ } \ else \ { \ /* If the compiler complains about the size of this array type too \ many parameters have been passed to open. */ \ typedef int __open_too_many_args[-(sizeof (___arr) > sizeof (int))]; \ ___r = open (fname, flags, ___arr[0]); \ } \ ___r; \ }) #ifdef __USE_LARGEFILE64 extern int __open64_2 (__const char *__path, int __oflag) __nonnull ((1)); # define open64(fname, flags, ...) \ ({ int ___r; \ /* If the compiler complains about an invalid type, excess elements, etc \ in the initialization this means a parameter of the wrong type has \ been passed to open64. */ \ int ___arr[] = { __VA_ARGS__ }; \ if (__builtin_constant_p (flags) && ((flags) & O_CREAT) != 0) \ { \ /* If the compiler complains about the size of this array type the \ mode parameter is missing since O_CREAT has been used. */ \ typedef int __open_missing_mode[((flags) & O_CREAT) != 0 \ ? ((long int) sizeof (___arr) \ - (long int) sizeof (int)) : 1]; \ } \ if (sizeof (___arr) == 0) \ { \ if (__builtin_constant_p (flags) && ((flags) & O_CREAT) == 0) \ ___r = open64 (fname, flags); \ else \ ___r = __open64_2 (fname, flags); \ } \ else \ { \ /* If the compiler complains about the size of this array type too \ many parameters have been passed to open64. */ \ typedef int __open_too_many_args[-(sizeof (___arr) > sizeof (int))]; \ ___r = open64 (fname, flags, ___arr[0]); \ } \ ___r; \ }) #endif #ifdef __USE_ATFILE # ifndef __USE_FILE_OFFSET64 extern int __openat_2 (int __fd, __const char *__path, int __oflag) __nonnull ((2)); # else extern int __REDIRECT (__openat_2, (int __fd, __const char *__file, int __oflag), __openat64_2) __nonnull ((2)); # endif # define openat(fd, fname, flags, ...) \ ({ int ___r; \ /* If the compiler complains about an invalid type, excess elements, etc \ in the initialization this means a parameter of the wrong type has \ been passed to openat. */ \ int ___arr[] = { __VA_ARGS__ }; \ if (__builtin_constant_p (flags) && ((flags) & O_CREAT) != 0) \ { \ /* If the compiler complains about the size of this array type the \ mode parameter is missing since O_CREAT has been used. */ \ typedef int __open_missing_mode[((flags) & O_CREAT) != 0 \ ? ((long int) sizeof (___arr) \ - (long int) sizeof (int)) : 1]; \ } \ if (sizeof (___arr) == 0) \ { \ if (__builtin_constant_p (flags) && ((flags) & O_CREAT) == 0) \ ___r = openat (fd, fname, flags); \ else \ ___r = __openat_2 (fd, fname, flags); \ } \ else \ { \ /* If the compiler complains about the size of this array type too \ many parameters have been passed to openat. */ \ typedef int __open_too_many_args[-(sizeof (___arr) > sizeof (int))]; \ ___r = openat (fd, fname, flags, ___arr[0]); \ } \ ___r; \ }) # ifdef __USE_LARGEFILE64 extern int __openat64_2 (int __fd, __const char *__path, int __oflag) __nonnull ((2)); # define openat64(fd, fname, flags, ...) \ ({ int ___r; \ /* If the compiler complains about an invalid type, excess elements, etc \ in the initialization this means a parameter of the wrong type has \ been passed to openat64. */ \ int ___arr[] = { __VA_ARGS__ }; \ if (__builtin_constant_p (flags) && ((flags) & O_CREAT) != 0) \ { \ /* If the compiler complains about the size of this array type the \ mode parameter is missing since O_CREAT has been used. */ \ typedef int __open_missing_mode[((flags) & O_CREAT) != 0 \ ? ((long int) sizeof (___arr) \ - (long int) sizeof (int)) : 1]; \ } \ if (sizeof (___arr) == 0) \ { \ if (__builtin_constant_p (flags) && ((flags) & O_CREAT) == 0) \ ___r = openat64 (fd, fname, flags); \ else \ ___r = __openat64_2 (fd, fname, flags); \ } \ else \ { \ /* If the compiler complains about the size of this array type too \ many parameters have been passed to openat64. */ \ typedef int __open_too_many_args[-(sizeof (___arr) > sizeof (int))]; \ ___r = openat64 (fd, fname, flags, ___arr[0]); \ } \ ___r; \ }) # endif #endif