1 /* Checking macros for fcntl functions. 2 Copyright (C) 2007 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, write to the Free 17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18 02111-1307 USA. */ 19 20 #ifndef _FCNTL_H 21 # error "Never include <bits/fcntl2.h> directly; use <fcntl.h> instead." 22 #endif 23 24 /* Check that calls to open and openat with O_CREAT set have an 25 appropriate third/fourth parameter. */ 26 #ifndef __USE_FILE_OFFSET64 27 extern int __open_2 (__const char *__path, int __oflag) __nonnull ((1)); 28 extern int __REDIRECT (__open_alias, (__const char *__path, int __oflag, ...), 29 open) __nonnull ((1)); 30 #else 31 extern int __REDIRECT (__open_2, (__const char *__path, int __oflag), 32 __open64_2) __nonnull ((1)); 33 extern int __REDIRECT (__open_alias, (__const char *__path, int __oflag, ...), 34 open64) __nonnull ((1)); 35 #endif 36 __errordecl (__open_too_many_args, 37 "open can be called either with 2 or 3 arguments, not more"); 38 __errordecl (__open_missing_mode, 39 "open with O_CREAT in second argument needs 3 arguments"); 40 41 __extern_always_inline int 42 open (__const char *__path, int __oflag, ...) 43 { 44 if (__va_arg_pack_len () > 1) 45 __open_too_many_args (); 46 47 if (__builtin_constant_p (__oflag)) 48 { 49 if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () < 1) 50 { 51 __open_missing_mode (); 52 return __open_2 (__path, __oflag); 53 } 54 return __open_alias (__path, __oflag, __va_arg_pack ()); 55 } 56 57 if (__va_arg_pack_len () < 1) 58 return __open_2 (__path, __oflag); 59 60 return __open_alias (__path, __oflag, __va_arg_pack ()); 61 } 62 63 64 #ifdef __USE_LARGEFILE64 65 extern int __open64_2 (__const char *__path, int __oflag) __nonnull ((1)); 66 extern int __REDIRECT (__open64_alias, (__const char *__path, int __oflag, 67 ...), open64) __nonnull ((1)); 68 __errordecl (__open64_too_many_args, 69 "open64 can be called either with 2 or 3 arguments, not more"); 70 __errordecl (__open64_missing_mode, 71 "open64 with O_CREAT in second argument needs 3 arguments"); 72 73 __extern_always_inline int 74 open64 (__const char *__path, int __oflag, ...) 75 { 76 if (__va_arg_pack_len () > 1) 77 __open64_too_many_args (); 78 79 if (__builtin_constant_p (__oflag)) 80 { 81 if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () < 1) 82 { 83 __open64_missing_mode (); 84 return __open64_2 (__path, __oflag); 85 } 86 return __open64_alias (__path, __oflag, __va_arg_pack ()); 87 } 88 89 if (__va_arg_pack_len () < 1) 90 return __open64_2 (__path, __oflag); 91 92 return __open64_alias (__path, __oflag, __va_arg_pack ()); 93 } 94 #endif 95 96 97 #ifdef __USE_ATFILE 98 # ifndef __USE_FILE_OFFSET64 99 extern int __openat_2 (int __fd, __const char *__path, int __oflag) 100 __nonnull ((2)); 101 extern int __REDIRECT (__openat_alias, (int __fd, __const char *__path, 102 int __oflag, ...), openat) 103 __nonnull ((2)); 104 # else 105 extern int __REDIRECT (__openat_2, (int __fd, __const char *__path, 106 int __oflag), __openat64_2) 107 __nonnull ((2)); 108 extern int __REDIRECT (__openat_alias, (int __fd, __const char *__path, 109 int __oflag, ...), openat64) 110 __nonnull ((2)); 111 # endif 112 __errordecl (__openat_too_many_args, 113 "openat can be called either with 3 or 4 arguments, not more"); 114 __errordecl (__openat_missing_mode, 115 "openat with O_CREAT in third argument needs 4 arguments"); 116 117 __extern_always_inline int 118 openat (int __fd, __const char *__path, int __oflag, ...) 119 { 120 if (__va_arg_pack_len () > 1) 121 __openat_too_many_args (); 122 123 if (__builtin_constant_p (__oflag)) 124 { 125 if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () < 1) 126 { 127 __openat_missing_mode (); 128 return __openat_2 (__fd, __path, __oflag); 129 } 130 return __openat_alias (__fd, __path, __oflag, __va_arg_pack ()); 131 } 132 133 if (__va_arg_pack_len () < 1) 134 return __openat_2 (__fd, __path, __oflag); 135 136 return __openat_alias (__fd, __path, __oflag, __va_arg_pack ()); 137 } 138 139 140 # ifdef __USE_LARGEFILE64 141 extern int __openat64_2 (int __fd, __const char *__path, int __oflag) 142 __nonnull ((2)); 143 extern int __REDIRECT (__openat64_alias, (int __fd, __const char *__path, 144 int __oflag, ...), openat64) 145 __nonnull ((2)); 146 __errordecl (__openat64_too_many_args, 147 "openat64 can be called either with 3 or 4 arguments, not more"); 148 __errordecl (__openat64_missing_mode, 149 "openat64 with O_CREAT in third argument needs 4 arguments"); 150 151 __extern_always_inline int 152 openat64 (int __fd, __const char *__path, int __oflag, ...) 153 { 154 if (__va_arg_pack_len () > 1) 155 __openat64_too_many_args (); 156 157 if (__builtin_constant_p (__oflag)) 158 { 159 if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () < 1) 160 { 161 __openat64_missing_mode (); 162 return __openat64_2 (__fd, __path, __oflag); 163 } 164 return __openat64_alias (__fd, __path, __oflag, __va_arg_pack ()); 165 } 166 167 if (__va_arg_pack_len () < 1) 168 return __openat64_2 (__fd, __path, __oflag); 169 170 return __openat64_alias (__fd, __path, __oflag, __va_arg_pack ()); 171 } 172 # endif 173 #endif 174
