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Diffstat (limited to 'io/bits/fcntl2.h')
| -rw-r--r-- | io/bits/fcntl2.h | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/io/bits/fcntl2.h b/io/bits/fcntl2.h new file mode 100644 index 0000000000..a1b03f6194 --- /dev/null +++ b/io/bits/fcntl2.h @@ -0,0 +1,177 @@ +/* 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 <bits/fcntl2.h> directly; use <fcntl.h> 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 |