1 /* Checking macros for stdio functions. 2 Copyright (C) 2004, 2005, 2007, 2008 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 _STDIO_H 21 # error "Never include <bits/stdio2.h> directly; use <stdio.h> instead." 22 #endif 23 24 extern int __sprintf_chk (char *__restrict __s, int __flag, size_t __slen, 25 __const char *__restrict __format, ...) __THROW; 26 extern int __vsprintf_chk (char *__restrict __s, int __flag, size_t __slen, 27 __const char *__restrict __format, 28 _G_va_list __ap) __THROW; 29 30 #ifdef __va_arg_pack 31 __extern_always_inline int 32 __NTH (sprintf (char *__restrict __s, __const char *__restrict __fmt, ...)) 33 { 34 return __builtin___sprintf_chk (__s, __USE_FORTIFY_LEVEL - 1, 35 __bos (__s), __fmt, __va_arg_pack ()); 36 } 37 #elif !defined __cplusplus 38 # define sprintf(str, ...) \ 39 __builtin___sprintf_chk (str, __USE_FORTIFY_LEVEL - 1, __bos (str), \ 40 __VA_ARGS__) 41 #endif 42 43 __extern_always_inline int 44 __NTH (vsprintf (char *__restrict __s, __const char *__restrict __fmt, 45 _G_va_list __ap)) 46 { 47 return __builtin___vsprintf_chk (__s, __USE_FORTIFY_LEVEL - 1, 48 __bos (__s), __fmt, __ap); 49 } 50 51 #if defined __USE_BSD || defined __USE_ISOC99 || defined __USE_UNIX98 52 53 extern int __snprintf_chk (char *__restrict __s, size_t __n, int __flag, 54 size_t __slen, __const char *__restrict __format, 55 ...) __THROW; 56 extern int __vsnprintf_chk (char *__restrict __s, size_t __n, int __flag, 57 size_t __slen, __const char *__restrict __format, 58 _G_va_list __ap) __THROW; 59 60 # ifdef __va_arg_pack 61 __extern_always_inline int 62 __NTH (snprintf (char *__restrict __s, size_t __n, 63 __const char *__restrict __fmt, ...)) 64 { 65 return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1, 66 __bos (__s), __fmt, __va_arg_pack ()); 67 } 68 # elif !defined __cplusplus 69 # define snprintf(str, len, ...) \ 70 __builtin___snprintf_chk (str, len, __USE_FORTIFY_LEVEL - 1, __bos (str), \ 71 __VA_ARGS__) 72 # endif 73 74 __extern_always_inline int 75 __NTH (vsnprintf (char *__restrict __s, size_t __n, 76 __const char *__restrict __fmt, _G_va_list __ap)) 77 { 78 return __builtin___vsnprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1, 79 __bos (__s), __fmt, __ap); 80 } 81 82 #endif 83 84 #if __USE_FORTIFY_LEVEL > 1 85 86 extern int __fprintf_chk (FILE *__restrict __stream, int __flag, 87 __const char *__restrict __format, ...); 88 extern int __printf_chk (int __flag, __const char *__restrict __format, ...); 89 extern int __vfprintf_chk (FILE *__restrict __stream, int __flag, 90 __const char *__restrict __format, _G_va_list __ap); 91 extern int __vprintf_chk (int __flag, __const char *__restrict __format, 92 _G_va_list __ap); 93 94 # ifdef __va_arg_pack 95 __extern_always_inline int 96 fprintf (FILE *__restrict __stream, __const char *__restrict __fmt, ...) 97 { 98 return __fprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt, 99 __va_arg_pack ()); 100 } 101 102 __extern_always_inline int 103 printf (__const char *__restrict __fmt, ...) 104 { 105 return __printf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __va_arg_pack ()); 106 } 107 # elif !defined __cplusplus 108 # define printf(...) \ 109 __printf_chk (__USE_FORTIFY_LEVEL - 1, __VA_ARGS__) 110 # define fprintf(stream, ...) \ 111 __fprintf_chk (stream, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__) 112 # endif 113 114 __extern_always_inline int 115 vprintf (__const char *__restrict __fmt, _G_va_list __ap) 116 { 117 #ifdef __USE_EXTERN_INLINES 118 return __vfprintf_chk (stdout, __USE_FORTIFY_LEVEL - 1, __fmt, __ap); 119 #else 120 return __vprintf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __ap); 121 #endif 122 } 123 124 __extern_always_inline int 125 vfprintf (FILE *__restrict __stream, 126 __const char *__restrict __fmt, _G_va_list __ap) 127 { 128 return __vfprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt, __ap); 129 } 130 131 # ifdef __USE_GNU 132 133 extern int __asprintf_chk (char **__restrict __ptr, int __flag, 134 __const char *__restrict __fmt, ...) 135 __THROW __attribute__ ((__format__ (__printf__, 3, 4))) __wur; 136 extern int __vasprintf_chk (char **__restrict __ptr, int __flag, 137 __const char *__restrict __fmt, _G_va_list __arg) 138 __THROW __attribute__ ((__format__ (__printf__, 3, 0))) __wur; 139 extern int __dprintf_chk (int __fd, int __flag, __const char *__restrict __fmt, 140 ...) __attribute__ ((__format__ (__printf__, 3, 4))); 141 extern int __vdprintf_chk (int __fd, int __flag, 142 __const char *__restrict __fmt, _G_va_list __arg) 143 __attribute__ ((__format__ (__printf__, 3, 0))); 144 extern int __obstack_printf_chk (struct obstack *__restrict __obstack, 145 int __flag, __const char *__restrict __format, 146 ...) 147 __THROW __attribute__ ((__format__ (__printf__, 3, 4))); 148 extern int __obstack_vprintf_chk (struct obstack *__restrict __obstack, 149 int __flag, 150 __const char *__restrict __format, 151 _G_va_list __args) 152 __THROW __attribute__ ((__format__ (__printf__, 3, 0))); 153 154 # ifdef __va_arg_pack 155 __extern_always_inline int 156 __NTH (asprintf (char **__restrict __ptr, __const char *__restrict __fmt, ...)) 157 { 158 return __asprintf_chk (__ptr, __USE_FORTIFY_LEVEL - 1, __fmt, 159 __va_arg_pack ()); 160 } 161 162 __extern_always_inline int 163 __NTH (__asprintf (char **__restrict __ptr, __const char *__restrict __fmt, 164 ...)) 165 { 166 return __asprintf_chk (__ptr, __USE_FORTIFY_LEVEL - 1, __fmt, 167 __va_arg_pack ()); 168 } 169 170 __extern_always_inline int 171 dprintf (int __fd, __const char *__restrict __fmt, ...) 172 { 173 return __dprintf_chk (__fd, __USE_FORTIFY_LEVEL - 1, __fmt, 174 __va_arg_pack ()); 175 } 176 177 __extern_always_inline int 178 __NTH (obstack_printf (struct obstack *__restrict __obstack, 179 __const char *__restrict __fmt, ...)) 180 { 181 return __obstack_printf_chk (__obstack, __USE_FORTIFY_LEVEL - 1, __fmt, 182 __va_arg_pack ()); 183 } 184 # elif !defined __cplusplus 185 # define asprintf(ptr, ...) \ 186 __asprintf_chk (ptr, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__) 187 # define __asprintf(ptr, ...) \ 188 __asprintf_chk (ptr, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__) 189 # define dprintf(fd, ...) \ 190 __dprintf_chk (fd, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__) 191 # define obstack_printf(obstack, ...) \ 192 __obstack_printf_chk (obstack, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__) 193 # endif 194 195 __extern_always_inline int 196 __NTH (vasprintf (char **__restrict __ptr, __const char *__restrict __fmt, 197 _G_va_list __ap)) 198 { 199 return __vasprintf_chk (__ptr, __USE_FORTIFY_LEVEL - 1, __fmt, __ap); 200 } 201 202 __extern_always_inline int 203 vdprintf (int __fd, __const char *__restrict __fmt, _G_va_list __ap) 204 { 205 return __vdprintf_chk (__fd, __USE_FORTIFY_LEVEL - 1, __fmt, __ap); 206 } 207 208 __extern_always_inline int 209 __NTH (obstack_vprintf (struct obstack *__restrict __obstack, 210 __const char *__restrict __fmt, _G_va_list __ap)) 211 { 212 return __obstack_vprintf_chk (__obstack, __USE_FORTIFY_LEVEL - 1, __fmt, 213 __ap); 214 } 215 216 # endif 217 218 #endif 219 220 extern char *__gets_chk (char *__str, size_t) __wur; 221 extern char *__REDIRECT (__gets_warn, (char *__str), gets) 222 __wur __warnattr ("please use fgets or getline instead, gets can't " 223 "specify buffer size"); 224 225 __extern_always_inline __wur char * 226 gets (char *__str) 227 { 228 if (__bos (__str) != (size_t) -1) 229 return __gets_chk (__str, __bos (__str)); 230 return __gets_warn (__str); 231 } 232 233 extern char *__fgets_chk (char *__restrict __s, size_t __size, int __n, 234 FILE *__restrict __stream) __wur; 235 extern char *__REDIRECT (__fgets_alias, 236 (char *__restrict __s, int __n, 237 FILE *__restrict __stream), fgets) __wur; 238 extern char *__REDIRECT (__fgets_chk_warn, 239 (char *__restrict __s, size_t __size, int __n, 240 FILE *__restrict __stream), __fgets_chk) 241 __wur __warnattr ("fgets called with bigger size than length " 242 "of destination buffer"); 243 244 __extern_always_inline __wur char * 245 fgets (char *__restrict __s, int __n, FILE *__restrict __stream) 246 { 247 if (__bos (__s) != (size_t) -1) 248 { 249 if (!__builtin_constant_p (__n) || __n <= 0) 250 return __fgets_chk (__s, __bos (__s), __n, __stream); 251 252 if ((size_t) __n > __bos (__s)) 253 return __fgets_chk_warn (__s, __bos (__s), __n, __stream); 254 } 255 return __fgets_alias (__s, __n, __stream); 256 } 257 258 extern size_t __fread_chk (void *__restrict __ptr, size_t __ptrlen, 259 size_t __size, size_t __n, 260 FILE *__restrict __stream) __wur; 261 extern size_t __REDIRECT (__fread_alias, 262 (void *__restrict __ptr, size_t __size, 263 size_t __n, FILE *__restrict __stream), 264 fread) __wur; 265 extern size_t __REDIRECT (__fread_chk_warn, 266 (void *__restrict __ptr, size_t __ptrlen, 267 size_t __size, size_t __n, 268 FILE *__restrict __stream), 269 __fread_chk) 270 __wur __warnattr ("fread called with bigger size * nmemb than length " 271 "of destination buffer"); 272 273 __extern_always_inline __wur size_t 274 fread (void *__restrict __ptr, size_t __size, size_t __n, 275 FILE *__restrict __stream) 276 { 277 if (__bos0 (__ptr) != (size_t) -1) 278 { 279 if (!__builtin_constant_p (__size) 280 || !__builtin_constant_p (__n) 281 || (__size | __n) >= (((size_t) 1) << (8 * sizeof (size_t) / 2))) 282 return __fread_chk (__ptr, __bos0 (__ptr), __size, __n, __stream); 283 284 if (__size * __n > __bos0 (__ptr)) 285 return __fread_chk_warn (__ptr, __bos0 (__ptr), __size, __n, __stream); 286 } 287 return __fread_alias (__ptr, __size, __n, __stream); 288 } 289 290 #ifdef __USE_GNU 291 extern char *__fgets_unlocked_chk (char *__restrict __s, size_t __size, 292 int __n, FILE *__restrict __stream) __wur; 293 extern char *__REDIRECT (__fgets_unlocked_alias, 294 (char *__restrict __s, int __n, 295 FILE *__restrict __stream), fgets_unlocked) __wur; 296 extern char *__REDIRECT (__fgets_unlocked_chk_warn, 297 (char *__restrict __s, size_t __size, int __n, 298 FILE *__restrict __stream), __fgets_unlocked_chk) 299 __wur __warnattr ("fgets_unlocked called with bigger size than length " 300 "of destination buffer"); 301 302 __extern_always_inline __wur char * 303 fgets_unlocked (char *__restrict __s, int __n, FILE *__restrict __stream) 304 { 305 if (__bos (__s) != (size_t) -1) 306 { 307 if (!__builtin_constant_p (__n) || __n <= 0) 308 return __fgets_unlocked_chk (__s, __bos (__s), __n, __stream); 309 310 if ((size_t) __n > __bos (__s)) 311 return __fgets_unlocked_chk_warn (__s, __bos (__s), __n, __stream); 312 } 313 return __fgets_unlocked_alias (__s, __n, __stream); 314 } 315 #endif 316 317 #ifdef __USE_MISC 318 # undef fread_unlocked 319 extern size_t __fread_unlocked_chk (void *__restrict __ptr, size_t __ptrlen, 320 size_t __size, size_t __n, 321 FILE *__restrict __stream) __wur; 322 extern size_t __REDIRECT (__fread_unlocked_alias, 323 (void *__restrict __ptr, size_t __size, 324 size_t __n, FILE *__restrict __stream), 325 fread_unlocked) __wur; 326 extern size_t __REDIRECT (__fread_unlocked_chk_warn, 327 (void *__restrict __ptr, size_t __ptrlen, 328 size_t __size, size_t __n, 329 FILE *__restrict __stream), 330 __fread_unlocked_chk) 331 __wur __warnattr ("fread_unlocked called with bigger size * nmemb than " 332 "length of destination buffer"); 333 334 __extern_always_inline __wur size_t 335 fread_unlocked (void *__restrict __ptr, size_t __size, size_t __n, 336 FILE *__restrict __stream) 337 { 338 if (__bos0 (__ptr) != (size_t) -1) 339 { 340 if (!__builtin_constant_p (__size) 341 || !__builtin_constant_p (__n) 342 || (__size | __n) >= (((size_t) 1) << (8 * sizeof (size_t) / 2))) 343 return __fread_unlocked_chk (__ptr, __bos0 (__ptr), __size, __n, 344 __stream); 345 346 if (__size * __n > __bos0 (__ptr)) 347 return __fread_unlocked_chk_warn (__ptr, __bos0 (__ptr), __size, __n, 348 __stream); 349 } 350 351 # ifdef __USE_EXTERN_INLINES 352 if (__builtin_constant_p (__size) 353 && __builtin_constant_p (__n) 354 && (__size | __n) < (((size_t) 1) << (8 * sizeof (size_t) / 2)) 355 && __size * __n <= 8) 356 { 357 size_t __cnt = __size * __n; 358 char *__cptr = (char *) __ptr; 359 if (__cnt == 0) 360 return 0; 361 362 for (; __cnt > 0; --__cnt) 363 { 364 int __c = _IO_getc_unlocked (__stream); 365 if (__c == EOF) 366 break; 367 *__cptr++ = __c; 368 } 369 return (__cptr - (char *) __ptr) / __size; 370 } 371 # endif 372 return __fread_unlocked_alias (__ptr, __size, __n, __stream); 373 } 374 #endif 375
