1 /* Define ISO C stdio on top of C++ iostreams. 2 Copyright (C) 1991,1994-2004,2005,2006,2007 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 /* 21 * ISO C99 Standard: 7.19 Input/output <stdio.h> 22 */ 23 24 #ifndef _STDIO_H 25 26 #if !defined __need_FILE && !defined __need___FILE 27 # define _STDIO_H 1 28 # include <features.h> 29 30 __BEGIN_DECLS 31 32 # define __need_size_t 33 # define __need_NULL 34 # include <stddef.h> 35 36 # include <bits/types.h> 37 # define __need_FILE 38 # define __need___FILE 39 #endif /* Don't need FILE. */ 40 41 42 #if !defined __FILE_defined && defined __need_FILE 43 44 /* Define outside of namespace so the C++ is happy. */ 45 struct _IO_FILE; 46 47 __BEGIN_NAMESPACE_STD 48 /* The opaque type of streams. This is the definition used elsewhere. */ 49 typedef struct _IO_FILE FILE; 50 __END_NAMESPACE_STD 51 #if defined __USE_LARGEFILE64 || defined __USE_SVID || defined __USE_POSIX \ 52 || defined __USE_BSD || defined __USE_ISOC99 || defined __USE_XOPEN \ 53 || defined __USE_POSIX2 54 __USING_NAMESPACE_STD(FILE) 55 #endif 56 57 # define __FILE_defined 1 58 #endif /* FILE not defined. */ 59 #undef __need_FILE 60 61 62 #if !defined ____FILE_defined && defined __need___FILE 63 64 /* The opaque type of streams. This is the definition used elsewhere. */ 65 typedef struct _IO_FILE __FILE; 66 67 # define ____FILE_defined 1 68 #endif /* __FILE not defined. */ 69 #undef __need___FILE 70 71 72 #ifdef _STDIO_H 73 #define _STDIO_USES_IOSTREAM 74 75 #include <libio.h> 76 77 #ifdef __USE_XOPEN 78 # ifdef __GNUC__ 79 # ifndef _VA_LIST_DEFINED 80 typedef _G_va_list va_list; 81 # define _VA_LIST_DEFINED 82 # endif 83 # else 84 # include <stdarg.h> 85 # endif 86 #endif 87 88 /* The type of the second argument to `fgetpos' and `fsetpos'. */ 89 __BEGIN_NAMESPACE_STD 90 #ifndef __USE_FILE_OFFSET64 91 typedef _G_fpos_t fpos_t; 92 #else 93 typedef _G_fpos64_t fpos_t; 94 #endif 95 __END_NAMESPACE_STD 96 #ifdef __USE_LARGEFILE64 97 typedef _G_fpos64_t fpos64_t; 98 #endif 99 100 /* The possibilities for the third argument to `setvbuf'. */ 101 #define _IOFBF 0 /* Fully buffered. */ 102 #define _IOLBF 1 /* Line buffered. */ 103 #define _IONBF 2 /* No buffering. */ 104 105 106 /* Default buffer size. */ 107 #ifndef BUFSIZ 108 # define BUFSIZ _IO_BUFSIZ 109 #endif 110 111 112 /* End of file character. 113 Some things throughout the library rely on this being -1. */ 114 #ifndef EOF 115 # define EOF (-1) 116 #endif 117 118 119 /* The possibilities for the third argument to `fseek'. 120 These values should not be changed. */ 121 #define SEEK_SET 0 /* Seek from beginning of file. */ 122 #define SEEK_CUR 1 /* Seek from current position. */ 123 #define SEEK_END 2 /* Seek from end of file. */ 124 125 126 #if defined __USE_SVID || defined __USE_XOPEN 127 /* Default path prefix for `tempnam' and `tmpnam'. */ 128 # define P_tmpdir "/tmp" 129 #endif 130 131 132 /* Get the values: 133 L_tmpnam How long an array of chars must be to be passed to `tmpnam'. 134 TMP_MAX The minimum number of unique filenames generated by tmpnam 135 (and tempnam when it uses tmpnam's name space), 136 or tempnam (the two are separate). 137 L_ctermid How long an array to pass to `ctermid'. 138 L_cuserid How long an array to pass to `cuserid'. 139 FOPEN_MAX Minimum number of files that can be open at once. 140 FILENAME_MAX Maximum length of a filename. */ 141 #include <bits/stdio_lim.h> 142 143 144 /* Standard streams. */ 145 extern struct _IO_FILE *stdin; /* Standard input stream. */ 146 extern struct _IO_FILE *stdout; /* Standard output stream. */ 147 extern struct _IO_FILE *stderr; /* Standard error output stream. */ 148 /* C89/C99 say they're macros. Make them happy. */ 149 #define stdin stdin 150 #define stdout stdout 151 #define stderr stderr 152 153 __BEGIN_NAMESPACE_STD 154 /* Remove file FILENAME. */ 155 extern int remove (__const char *__filename) __THROW; 156 /* Rename file OLD to NEW. */ 157 extern int rename (__const char *__old, __const char *__new) __THROW; 158 __END_NAMESPACE_STD 159 160 #ifdef __USE_ATFILE 161 /* Rename file OLD relative to OLDFD to NEW relative to NEWFD. */ 162 extern int renameat (int __oldfd, __const char *__old, int __newfd, 163 __const char *__new) __THROW; 164 #endif 165 166 __BEGIN_NAMESPACE_STD 167 /* Create a temporary file and open it read/write. 168 169 This function is a possible cancellation points and therefore not 170 marked with __THROW. */ 171 #ifndef __USE_FILE_OFFSET64 172 extern FILE *tmpfile (void) __wur; 173 #else 174 # ifdef __REDIRECT 175 extern FILE *__REDIRECT (tmpfile, (void), tmpfile64) __wur; 176 # else 177 # define tmpfile tmpfile64 178 # endif 179 #endif 180 181 #ifdef __USE_LARGEFILE64 182 extern FILE *tmpfile64 (void) __wur; 183 #endif 184 185 /* Generate a temporary filename. */ 186 extern char *tmpnam (char *__s) __THROW __wur; 187 __END_NAMESPACE_STD 188 189 #ifdef __USE_MISC 190 /* This is the reentrant variant of `tmpnam'. The only difference is 191 that it does not allow S to be NULL. */ 192 extern char *tmpnam_r (char *__s) __THROW __wur; 193 #endif 194 195 196 #if defined __USE_SVID || defined __USE_XOPEN 197 /* Generate a unique temporary filename using up to five characters of PFX 198 if it is not NULL. The directory to put this file in is searched for 199 as follows: First the environment variable "TMPDIR" is checked. 200 If it contains the name of a writable directory, that directory is used. 201 If not and if DIR is not NULL, that value is checked. If that fails, 202 P_tmpdir is tried and finally "/tmp". The storage for the filename 203 is allocated by `malloc'. */ 204 extern char *tempnam (__const char *__dir, __const char *__pfx) 205 __THROW __attribute_malloc__ __wur; 206 #endif 207 208 209 __BEGIN_NAMESPACE_STD 210 /* Close STREAM. 211 212 This function is a possible cancellation point and therefore not 213 marked with __THROW. */ 214 extern int fclose (FILE *__stream); 215 /* Flush STREAM, or all streams if STREAM is NULL. 216 217 This function is a possible cancellation point and therefore not 218 marked with __THROW. */ 219 extern int fflush (FILE *__stream); 220 __END_NAMESPACE_STD 221 222 #ifdef __USE_MISC 223 /* Faster versions when locking is not required. 224 225 This function is not part of POSIX and therefore no official 226 cancellation point. But due to similarity with an POSIX interface 227 or due to the implementation it is a cancellation point and 228 therefore not marked with __THROW. */ 229 extern int fflush_unlocked (FILE *__stream); 230 #endif 231 232 #ifdef __USE_GNU 233 /* Close all streams. 234 235 This function is not part of POSIX and therefore no official 236 cancellation point. But due to similarity with an POSIX interface 237 or due to the implementation it is a cancellation point and 238 therefore not marked with __THROW. */ 239 extern int fcloseall (void); 240 #endif 241 242 243 __BEGIN_NAMESPACE_STD 244 #ifndef __USE_FILE_OFFSET64 245 /* Open a file and create a new stream for it. 246 247 This function is a possible cancellation point and therefore not 248 marked with __THROW. */ 249 extern FILE *fopen (__const char *__restrict __filename, 250 __const char *__restrict __modes) __wur; 251 /* Open a file, replacing an existing stream with it. 252 253 This function is a possible cancellation point and therefore not 254 marked with __THROW. */ 255 extern FILE *freopen (__const char *__restrict __filename, 256 __const char *__restrict __modes, 257 FILE *__restrict __stream) __wur; 258 #else 259 # ifdef __REDIRECT 260 extern FILE *__REDIRECT (fopen, (__const char *__restrict __filename, 261 __const char *__restrict __modes), fopen64) 262 __wur; 263 extern FILE *__REDIRECT (freopen, (__const char *__restrict __filename, 264 __const char *__restrict __modes, 265 FILE *__restrict __stream), freopen64) 266 __wur; 267 # else 268 # define fopen fopen64 269 # define freopen freopen64 270 # endif 271 #endif 272 __END_NAMESPACE_STD 273 #ifdef __USE_LARGEFILE64 274 extern FILE *fopen64 (__const char *__restrict __filename, 275 __const char *__restrict __modes) __wur; 276 extern FILE *freopen64 (__const char *__restrict __filename, 277 __const char *__restrict __modes, 278 FILE *__restrict __stream) __wur; 279 #endif 280 281 #ifdef __USE_POSIX 282 /* Create a new stream that refers to an existing system file descriptor. */ 283 extern FILE *fdopen (int __fd, __const char *__modes) __THROW __wur; 284 #endif 285 286 #ifdef __USE_GNU 287 /* Create a new stream that refers to the given magic cookie, 288 and uses the given functions for input and output. */ 289 extern FILE *fopencookie (void *__restrict __magic_cookie, 290 __const char *__restrict __modes, 291 _IO_cookie_io_functions_t __io_funcs) __THROW __wur; 292 293 /* Create a new stream that refers to a memory buffer. */ 294 extern FILE *fmemopen (void *__s, size_t __len, __const char *__modes) 295 __THROW __wur; 296 297 /* Open a stream that writes into a malloc'd buffer that is expanded as 298 necessary. *BUFLOC and *SIZELOC are updated with the buffer's location 299 and the number of characters written on fflush or fclose. */ 300 extern FILE *open_memstream (char **__bufloc, size_t *__sizeloc) __THROW __wur; 301 #endif 302 303 304 __BEGIN_NAMESPACE_STD 305 /* If BUF is NULL, make STREAM unbuffered. 306 Else make it use buffer BUF, of size BUFSIZ. */ 307 extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __THROW; 308 /* Make STREAM use buffering mode MODE. 309 If BUF is not NULL, use N bytes of it for buffering; 310 else allocate an internal buffer N bytes long. */ 311 extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf, 312 int __modes, size_t __n) __THROW; 313 __END_NAMESPACE_STD 314 315 #ifdef __USE_BSD 316 /* If BUF is NULL, make STREAM unbuffered. 317 Else make it use SIZE bytes of BUF for buffering. */ 318 extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf, 319 size_t __size) __THROW; 320 321 /* Make STREAM line-buffered. */ 322 extern void setlinebuf (FILE *__stream) __THROW; 323 #endif 324 325 326 __BEGIN_NAMESPACE_STD 327 /* Write formatted output to STREAM. 328 329 This function is a possible cancellation point and therefore not 330 marked with __THROW. */ 331 extern int fprintf (FILE *__restrict __stream, 332 __const char *__restrict __format, ...); 333 /* Write formatted output to stdout. 334 335 This function is a possible cancellation point and therefore not 336 marked with __THROW. */ 337 extern int printf (__const char *__restrict __format, ...); 338 /* Write formatted output to S. */ 339 extern int sprintf (char *__restrict __s, 340 __const char *__restrict __format, ...) __THROW; 341 342 /* Write formatted output to S from argument list ARG. 343 344 This function is a possible cancellation point and therefore not 345 marked with __THROW. */ 346 extern int vfprintf (FILE *__restrict __s, __const char *__restrict __format, 347 _G_va_list __arg); 348 /* Write formatted output to stdout from argument list ARG. 349 350 This function is a possible cancellation point and therefore not 351 marked with __THROW. */ 352 extern int vprintf (__const char *__restrict __format, _G_va_list __arg); 353 /* Write formatted output to S from argument list ARG. */ 354 extern int vsprintf (char *__restrict __s, __const char *__restrict __format, 355 _G_va_list __arg) __THROW; 356 __END_NAMESPACE_STD 357 358 #if defined __USE_BSD || defined __USE_ISOC99 || defined __USE_UNIX98 359 __BEGIN_NAMESPACE_C99 360 /* Maximum chars of output to write in MAXLEN. */ 361 extern int snprintf (char *__restrict __s, size_t __maxlen, 362 __const char *__restrict __format, ...) 363 __THROW __attribute__ ((__format__ (__printf__, 3, 4))); 364 365 extern int vsnprintf (char *__restrict __s, size_t __maxlen, 366 __const char *__restrict __format, _G_va_list __arg) 367 __THROW __attribute__ ((__format__ (__printf__, 3, 0))); 368 __END_NAMESPACE_C99 369 #endif 370 371 #ifdef __USE_GNU 372 /* Write formatted output to a string dynamically allocated with `malloc'. 373 Store the address of the string in *PTR. */ 374 extern int vasprintf (char **__restrict __ptr, __const char *__restrict __f, 375 _G_va_list __arg) 376 __THROW __attribute__ ((__format__ (__printf__, 2, 0))) __wur; 377 extern int __asprintf (char **__restrict __ptr, 378 __const char *__restrict __fmt, ...) 379 __THROW __attribute__ ((__format__ (__printf__, 2, 3))) __wur; 380 extern int asprintf (char **__restrict __ptr, 381 __const char *__restrict __fmt, ...) 382 __THROW __attribute__ ((__format__ (__printf__, 2, 3))) __wur; 383 384 /* Write formatted output to a file descriptor. 385 386 These functions are not part of POSIX and therefore no official 387 cancellation point. But due to similarity with an POSIX interface 388 or due to the implementation they are cancellation points and 389 therefore not marked with __THROW. */ 390 extern int vdprintf (int __fd, __const char *__restrict __fmt, 391 _G_va_list __arg) 392 __attribute__ ((__format__ (__printf__, 2, 0))); 393 extern int dprintf (int __fd, __const char *__restrict __fmt, ...) 394 __attribute__ ((__format__ (__printf__, 2, 3))); 395 #endif 396 397 398 __BEGIN_NAMESPACE_STD 399 /* Read formatted input from STREAM. 400 401 This function is a possible cancellation point and therefore not 402 marked with __THROW. */ 403 extern int fscanf (FILE *__restrict __stream, 404 __const char *__restrict __format, ...) __wur; 405 /* Read formatted input from stdin. 406 407 This function is a possible cancellation point and therefore not 408 marked with __THROW. */ 409 extern int scanf (__const char *__restrict __format, ...) __wur; 410 /* Read formatted input from S. */ 411 extern int sscanf (__const char *__restrict __s, 412 __const char *__restrict __format, ...) __THROW; 413 414 #if defined __USE_ISOC99 && !defined __USE_GNU \ 415 && (!defined __LDBL_COMPAT || !defined __REDIRECT) \ 416 && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K) 417 # ifdef __REDIRECT 418 /* For strict ISO C99 or POSIX compliance disallow %as, %aS and %a[ 419 GNU extension which conflicts with valid %a followed by letter 420 s, S or [. */ 421 extern int __REDIRECT (fscanf, (FILE *__restrict __stream, 422 __const char *__restrict __format, ...), 423 __isoc99_fscanf) __wur; 424 extern int __REDIRECT (scanf, (__const char *__restrict __format, ...), 425 __isoc99_scanf) __wur; 426 extern int __REDIRECT (sscanf, (__const char *__restrict __s, 427 __const char *__restrict __format, ...), 428 __isoc99_sscanf) __THROW; 429 # else 430 extern int __isoc99_fscanf (FILE *__restrict __stream, 431 __const char *__restrict __format, ...) __wur; 432 extern int __isoc99_scanf (__const char *__restrict __format, ...) __wur; 433 extern int __isoc99_sscanf (__const char *__restrict __s, 434 __const char *__restrict __format, ...) __THROW; 435 # define fscanf __isoc99_fscanf 436 # define scanf __isoc99_scanf 437 # define sscanf __isoc99_sscanf 438 # endif 439 #endif 440 441 __END_NAMESPACE_STD 442 443 #ifdef __USE_ISOC99 444 __BEGIN_NAMESPACE_C99 445 /* Read formatted input from S into argument list ARG. 446 447 This function is a possible cancellation point and therefore not 448 marked with __THROW. */ 449 extern int vfscanf (FILE *__restrict __s, __const char *__restrict __format, 450 _G_va_list __arg) 451 __attribute__ ((__format__ (__scanf__, 2, 0))) __wur; 452 453 /* Read formatted input from stdin into argument list ARG. 454 455 This function is a possible cancellation point and therefore not 456 marked with __THROW. */ 457 extern int vscanf (__const char *__restrict __format, _G_va_list __arg) 458 __attribute__ ((__format__ (__scanf__, 1, 0))) __wur; 459 460 /* Read formatted input from S into argument list ARG. */ 461 extern int vsscanf (__const char *__restrict __s, 462 __const char *__restrict __format, _G_va_list __arg) 463 __THROW __attribute__ ((__format__ (__scanf__, 2, 0))); 464 465 # if !defined __USE_GNU \ 466 && (!defined __LDBL_COMPAT || !defined __REDIRECT) \ 467 && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K) 468 # ifdef __REDIRECT 469 /* For strict ISO C99 or POSIX compliance disallow %as, %aS and %a[ 470 GNU extension which conflicts with valid %a followed by letter 471 s, S or [. */ 472 extern int __REDIRECT (vfscanf, 473 (FILE *__restrict __s, 474 __const char *__restrict __format, _G_va_list __arg), 475 __isoc99_vfscanf) 476 __attribute__ ((__format__ (__scanf__, 2, 0))) __wur; 477 extern int __REDIRECT (vscanf, (__const char *__restrict __format, 478 _G_va_list __arg), __isoc99_vfscanf) 479 __attribute__ ((__format__ (__scanf__, 1, 0))) __wur; 480 extern int __REDIRECT (vsscanf, 481 (__const char *__restrict __s, 482 __const char *__restrict __format, _G_va_list __arg), 483 __isoc99_vsscanf) 484 __THROW __attribute__ ((__format__ (__scanf__, 2, 0))); 485 # else 486 extern int __isoc99_vfscanf (FILE *__restrict __s, 487 __const char *__restrict __format, 488 _G_va_list __arg) __wur; 489 extern int __isoc99_vscanf (__const char *__restrict __format, 490 _G_va_list __arg) __wur; 491 extern int __isoc99_vsscanf (__const char *__restrict __s, 492 __const char *__restrict __format, 493 _G_va_list __arg) __THROW; 494 # define vfscanf __isoc99_vfscanf 495 # define vscanf __isoc99_vsscanf 496 # define vsscanf __isoc99_vsscanf 497 # endif 498 # endif 499 500 __END_NAMESPACE_C99 501 #endif /* Use ISO C9x. */ 502 503 504 __BEGIN_NAMESPACE_STD 505 /* Read a character from STREAM. 506 507 These functions are possible cancellation points and therefore not 508 marked with __THROW. */ 509 extern int fgetc (FILE *__stream); 510 extern int getc (FILE *__stream); 511 512 /* Read a character from stdin. 513 514 This function is a possible cancellation point and therefore not 515 marked with __THROW. */ 516 extern int getchar (void); 517 __END_NAMESPACE_STD 518 519 /* The C standard explicitly says this is a macro, so we always do the 520 optimization for it. */ 521 #define getc(_fp) _IO_getc (_fp) 522 523 #if defined __USE_POSIX || defined __USE_MISC 524 /* These are defined in POSIX.1:1996. 525 526 These functions are possible cancellation points and therefore not 527 marked with __THROW. */ 528 extern int getc_unlocked (FILE *__stream); 529 extern int getchar_unlocked (void); 530 #endif /* Use POSIX or MISC. */ 531 532 #ifdef __USE_MISC 533 /* Faster version when locking is not necessary. 534 535 This function is not part of POSIX and therefore no official 536 cancellation point. But due to similarity with an POSIX interface 537 or due to the implementation it is a cancellation point and 538 therefore not marked with __THROW. */ 539 extern int fgetc_unlocked (FILE *__stream); 540 #endif /* Use MISC. */ 541 542 543 __BEGIN_NAMESPACE_STD 544 /* Write a character to STREAM. 545 546 These functions are possible cancellation points and therefore not 547 marked with __THROW. 548 549 These functions is a possible cancellation point and therefore not 550 marked with __THROW. */ 551 extern int fputc (int __c, FILE *__stream); 552 extern int putc (int __c, FILE *__stream); 553 554 /* Write a character to stdout. 555 556 This function is a possible cancellation point and therefore not 557 marked with __THROW. */ 558 extern int putchar (int __c); 559 __END_NAMESPACE_STD 560 561 /* The C standard explicitly says this can be a macro, 562 so we always do the optimization for it. */ 563 #define putc(_ch, _fp) _IO_putc (_ch, _fp) 564 565 #ifdef __USE_MISC 566 /* Faster version when locking is not necessary. 567 568 This function is not part of POSIX and therefore no official 569 cancellation point. But due to similarity with an POSIX interface 570 or due to the implementation it is a cancellation point and 571 therefore not marked with __THROW. */ 572 extern int fputc_unlocked (int __c, FILE *__stream); 573 #endif /* Use MISC. */ 574 575 #if defined __USE_POSIX || defined __USE_MISC 576 /* These are defined in POSIX.1:1996. 577 578 These functions are possible cancellation points and therefore not 579 marked with __THROW. */ 580 extern int putc_unlocked (int __c, FILE *__stream); 581 extern int putchar_unlocked (int __c); 582 #endif /* Use POSIX or MISC. */ 583 584 585 #if defined __USE_SVID || defined __USE_MISC \ 586 || (defined __USE_XOPEN && !defined __USE_XOPEN2K) 587 /* Get a word (int) from STREAM. */ 588 extern int getw (FILE *__stream); 589 590 /* Write a word (int) to STREAM. */ 591 extern int putw (int __w, FILE *__stream); 592 #endif 593 594 595 __BEGIN_NAMESPACE_STD 596 /* Get a newline-terminated string of finite length from STREAM. 597 598 This function is a possible cancellation point and therefore not 599 marked with __THROW. */ 600 extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream) 601 __wur; 602 603 /* Get a newline-terminated string from stdin, removing the newline. 604 DO NOT USE THIS FUNCTION!! There is no limit on how much it will read. 605 606 This function is a possible cancellation point and therefore not 607 marked with __THROW. */ 608 extern char *gets (char *__s) __wur; 609 __END_NAMESPACE_STD 610 611 #ifdef __USE_GNU 612 /* This function does the same as `fgets' but does not lock the stream. 613 614 This function is not part of POSIX and therefore no official 615 cancellation point. But due to similarity with an POSIX interface 616 or due to the implementation it is a cancellation point and 617 therefore not marked with __THROW. */ 618 extern char *fgets_unlocked (char *__restrict __s, int __n, 619 FILE *__restrict __stream) __wur; 620 #endif 621 622 623 #ifdef __USE_GNU 624 /* Read up to (and including) a DELIMITER from STREAM into *LINEPTR 625 (and null-terminate it). *LINEPTR is a pointer returned from malloc (or 626 NULL), pointing to *N characters of space. It is realloc'd as 627 necessary. Returns the number of characters read (not including the 628 null terminator), or -1 on error or EOF. 629 630 These functions are not part of POSIX and therefore no official 631 cancellation point. But due to similarity with an POSIX interface 632 or due to the implementation they are cancellation points and 633 therefore not marked with __THROW. */ 634 extern _IO_ssize_t __getdelim (char **__restrict __lineptr, 635 size_t *__restrict __n, int __delimiter, 636 FILE *__restrict __stream) __wur; 637 extern _IO_ssize_t getdelim (char **__restrict __lineptr, 638 size_t *__restrict __n, int __delimiter, 639 FILE *__restrict __stream) __wur; 640 641 /* Like `getdelim', but reads up to a newline. 642 643 This function is not part of POSIX and therefore no official 644 cancellation point. But due to similarity with an POSIX interface 645 or due to the implementation it is a cancellation point and 646 therefore not marked with __THROW. */ 647 extern _IO_ssize_t getline (char **__restrict __lineptr, 648 size_t *__restrict __n, 649 FILE *__restrict __stream) __wur; 650 #endif 651 652 653 __BEGIN_NAMESPACE_STD 654 /* Write a string to STREAM. 655 656 This function is a possible cancellation points and therefore not 657 marked with __THROW. */ 658 extern int fputs (__const char *__restrict __s, FILE *__restrict __stream); 659 660 /* Write a string, followed by a newline, to stdout. 661 662 This function is a possible cancellation points and therefore not 663 marked with __THROW. */ 664 extern int puts (__const char *__s); 665 666 667 /* Push a character back onto the input buffer of STREAM. 668 669 This function is a possible cancellation points and therefore not 670 marked with __THROW. */ 671 extern int ungetc (int __c, FILE *__stream); 672 673 674 /* Read chunks of generic data from STREAM. 675 676 This function is a possible cancellation points and therefore not 677 marked with __THROW. */ 678 extern size_t fread (void *__restrict __ptr, size_t __size, 679 size_t __n, FILE *__restrict __stream) __wur; 680 /* Write chunks of generic data to STREAM. 681 682 This function is a possible cancellation points and therefore not 683 marked with __THROW. */ 684 extern size_t fwrite (__const void *__restrict __ptr, size_t __size, 685 size_t __n, FILE *__restrict __s) __wur; 686 __END_NAMESPACE_STD 687 688 #ifdef __USE_GNU 689 /* This function does the same as `fputs' but does not lock the stream. 690 691 This function is not part of POSIX and therefore no official 692 cancellation point. But due to similarity with an POSIX interface 693 or due to the implementation it is a cancellation point and 694 therefore not marked with __THROW. */ 695 extern int fputs_unlocked (__const char *__restrict __s, 696 FILE *__restrict __stream); 697 #endif 698 699 #ifdef __USE_MISC 700 /* Faster versions when locking is not necessary. 701 702 These functions are not part of POSIX and therefore no official 703 cancellation point. But due to similarity with an POSIX interface 704 or due to the implementation they are cancellation points and 705 therefore not marked with __THROW. */ 706 extern size_t fread_unlocked (void *__restrict __ptr, size_t __size, 707 size_t __n, FILE *__restrict __stream) __wur; 708 extern size_t fwrite_unlocked (__const void *__restrict __ptr, size_t __size, 709 size_t __n, FILE *__restrict __stream) __wur; 710 #endif 711 712 713 __BEGIN_NAMESPACE_STD 714 /* Seek to a certain position on STREAM. 715 716 This function is a possible cancellation point and therefore not 717 marked with __THROW. */ 718 extern int fseek (FILE *__stream, long int __off, int __whence); 719 /* Return the current position of STREAM. 720 721 This function is a possible cancellation point and therefore not 722 marked with __THROW. */ 723 extern long int ftell (FILE *__stream) __wur; 724 /* Rewind to the beginning of STREAM. 725 726 This function is a possible cancellation point and therefore not 727 marked with __THROW. */ 728 extern void rewind (FILE *__stream); 729 __END_NAMESPACE_STD 730 731 /* The Single Unix Specification, Version 2, specifies an alternative, 732 more adequate interface for the two functions above which deal with 733 file offset. `long int' is not the right type. These definitions 734 are originally defined in the Large File Support API. */ 735 736 #if defined __USE_LARGEFILE || defined __USE_XOPEN2K 737 # ifndef __USE_FILE_OFFSET64 738 /* Seek to a certain position on STREAM. 739 740 This function is a possible cancellation point and therefore not 741 marked with __THROW. */ 742 extern int fseeko (FILE *__stream, __off_t __off, int __whence); 743 /* Return the current position of STREAM. 744 745 This function is a possible cancellation point and therefore not 746 marked with __THROW. */ 747 extern __off_t ftello (FILE *__stream) __wur; 748 # else 749 # ifdef __REDIRECT 750 extern int __REDIRECT (fseeko, 751 (FILE *__stream, __off64_t __off, int __whence), 752 fseeko64); 753 extern __off64_t __REDIRECT (ftello, (FILE *__stream), ftello64); 754 # else 755 # define fseeko fseeko64 756 # define ftello ftello64 757 # endif 758 # endif 759 #endif 760 761 __BEGIN_NAMESPACE_STD 762 #ifndef __USE_FILE_OFFSET64 763 /* Get STREAM's position. 764 765 This function is a possible cancellation point and therefore not 766 marked with __THROW. */ 767 extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos); 768 /* Set STREAM's position. 769 770 This function is a possible cancellation point and therefore not 771 marked with __THROW. */ 772 extern int fsetpos (FILE *__stream, __const fpos_t *__pos); 773 #else 774 # ifdef __REDIRECT 775 extern int __REDIRECT (fgetpos, (FILE *__restrict __stream, 776 fpos_t *__restrict __pos), fgetpos64); 777 extern int __REDIRECT (fsetpos, 778 (FILE *__stream, __const fpos_t *__pos), fsetpos64); 779 # else 780 # define fgetpos fgetpos64 781 # define fsetpos fsetpos64 782 # endif 783 #endif 784 __END_NAMESPACE_STD 785 786 #ifdef __USE_LARGEFILE64 787 extern int fseeko64 (FILE *__stream, __off64_t __off, int __whence); 788 extern __off64_t ftello64 (FILE *__stream) __wur; 789 extern int fgetpos64 (FILE *__restrict __stream, fpos64_t *__restrict __pos); 790 extern int fsetpos64 (FILE *__stream, __const fpos64_t *__pos); 791 #endif 792 793 __BEGIN_NAMESPACE_STD 794 /* Clear the error and EOF indicators for STREAM. */ 795 extern void clearerr (FILE *__stream) __THROW; 796 /* Return the EOF indicator for STREAM. */ 797 extern int feof (FILE *__stream) __THROW __wur; 798 /* Return the error indicator for STREAM. */ 799 extern int ferror (FILE *__stream) __THROW __wur; 800 __END_NAMESPACE_STD 801 802 #ifdef __USE_MISC 803 /* Faster versions when locking is not required. */ 804 extern void clearerr_unlocked (FILE *__stream) __THROW; 805 extern int feof_unlocked (FILE *__stream) __THROW __wur; 806 extern int ferror_unlocked (FILE *__stream) __THROW __wur; 807 #endif 808 809 810 __BEGIN_NAMESPACE_STD 811 /* Print a message describing the meaning of the value of errno. 812 813 This function is a possible cancellation point and therefore not 814 marked with __THROW. */ 815 extern void perror (__const char *__s); 816 __END_NAMESPACE_STD 817 818 /* Provide the declarations for `sys_errlist' and `sys_nerr' if they 819 are available on this system. Even if available, these variables 820 should not be used directly. The `strerror' function provides 821 all the necessary functionality. */ 822 #include <bits/sys_errlist.h> 823 824 825 #ifdef __USE_POSIX 826 /* Return the system file descriptor for STREAM. */ 827 extern int fileno (FILE *__stream) __THROW __wur; 828 #endif /* Use POSIX. */ 829 830 #ifdef __USE_MISC 831 /* Faster version when locking is not required. */ 832 extern int fileno_unlocked (FILE *__stream) __THROW __wur; 833 #endif 834 835 836 #if (defined __USE_POSIX2 || defined __USE_SVID || defined __USE_BSD || \ 837 defined __USE_MISC) 838 /* Create a new stream connected to a pipe running the given command. 839 840 This function is a possible cancellation point and therefore not 841 marked with __THROW. */ 842 extern FILE *popen (__const char *__command, __const char *__modes) __wur; 843 844 /* Close a stream opened by popen and return the status of its child. 845 846 This function is a possible cancellation point and therefore not 847 marked with __THROW. */ 848 extern int pclose (FILE *__stream); 849 #endif 850 851 852 #ifdef __USE_POSIX 853 /* Return the name of the controlling terminal. */ 854 extern char *ctermid (char *__s) __THROW; 855 #endif /* Use POSIX. */ 856 857 858 #ifdef __USE_XOPEN 859 /* Return the name of the current user. */ 860 extern char *cuserid (char *__s); 861 #endif /* Use X/Open, but not issue 6. */ 862 863 864 #ifdef __USE_GNU 865 struct obstack; /* See <obstack.h>. */ 866 867 /* Write formatted output to an obstack. */ 868 extern int obstack_printf (struct obstack *__restrict __obstack, 869 __const char *__restrict __format, ...) 870 __THROW __attribute__ ((__format__ (__printf__, 2, 3))); 871 extern int obstack_vprintf (struct obstack *__restrict __obstack, 872 __const char *__restrict __format, 873 _G_va_list __args) 874 __THROW __attribute__ ((__format__ (__printf__, 2, 0))); 875 #endif /* Use GNU. */ 876 877 878 #if defined __USE_POSIX || defined __USE_MISC 879 /* These are defined in POSIX.1:1996. */ 880 881 /* Acquire ownership of STREAM. */ 882 extern void flockfile (FILE *__stream) __THROW; 883 884 /* Try to acquire ownership of STREAM but do not block if it is not 885 possible. */ 886 extern int ftrylockfile (FILE *__stream) __THROW __wur; 887 888 /* Relinquish the ownership granted for STREAM. */ 889 extern void funlockfile (FILE *__stream) __THROW; 890 #endif /* POSIX || misc */ 891 892 #if defined __USE_XOPEN && !defined __USE_XOPEN2K && !defined __USE_GNU 893 /* The X/Open standard requires some functions and variables to be 894 declared here which do not belong into this header. But we have to 895 follow. In GNU mode we don't do this nonsense. */ 896 # define __need_getopt 897 # include <getopt.h> 898 #endif /* X/Open, but not issue 6 and not for GNU. */ 899 900 /* If we are compiling with optimizing read this file. It contains 901 several optimizing inline functions and macros. */ 902 #ifdef __USE_EXTERN_INLINES 903 # include <bits/stdio.h> 904 #endif 905 #if __USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline 906 # include <bits/stdio2.h> 907 #endif 908 #ifdef __LDBL_COMPAT 909 # include <bits/stdio-ldbl.h> 910 #endif 911 912 __END_DECLS 913 914 #endif /* <stdio.h> included. */ 915 916 #endif /* !_STDIO_H */ 917
