1 /* Define ISO C stdio on top of C++ iostreams. 2 Copyright (C) 1991-2022 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, see 17 <https://www.gnu.org/licenses/>. */ 18 19 /* 20 * ISO C99 Standard: 7.19 Input/output <stdio.h> 21 */ 22 23 #ifndef _STDIO_H 24 #define _STDIO_H 1 25 26 #define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION 27 #include <bits/libc-header-start.h> 28 29 __BEGIN_DECLS 30 31 #define __need_size_t 32 #define __need_NULL 33 #include <stddef.h> 34 35 #define __need___va_list 36 #include <stdarg.h> 37 38 #include <bits/types.h> 39 #include <bits/types/__fpos_t.h> 40 #include <bits/types/__fpos64_t.h> 41 #include <bits/types/__FILE.h> 42 #include <bits/types/FILE.h> 43 #include <bits/types/struct_FILE.h> 44 45 #ifdef __USE_GNU 46 # include <bits/types/cookie_io_functions_t.h> 47 #endif 48 49 #if defined __USE_XOPEN || defined __USE_XOPEN2K8 50 # ifdef __GNUC__ 51 # ifndef _VA_LIST_DEFINED 52 typedef __gnuc_va_list va_list; 53 # define _VA_LIST_DEFINED 54 # endif 55 # else 56 # include <stdarg.h> 57 # endif 58 #endif 59 60 #if defined __USE_UNIX98 || defined __USE_XOPEN2K 61 # ifndef __off_t_defined 62 # ifndef __USE_FILE_OFFSET64 63 typedef __off_t off_t; 64 # else 65 typedef __off64_t off_t; 66 # endif 67 # define __off_t_defined 68 # endif 69 # if defined __USE_LARGEFILE64 && !defined __off64_t_defined 70 typedef __off64_t off64_t; 71 # define __off64_t_defined 72 # endif 73 #endif 74 75 #ifdef __USE_XOPEN2K8 76 # ifndef __ssize_t_defined 77 typedef __ssize_t ssize_t; 78 # define __ssize_t_defined 79 # endif 80 #endif 81 82 /* The type of the second argument to `fgetpos' and `fsetpos'. */ 83 #ifndef __USE_FILE_OFFSET64 84 typedef __fpos_t fpos_t; 85 #else 86 typedef __fpos64_t fpos_t; 87 #endif 88 #ifdef __USE_LARGEFILE64 89 typedef __fpos64_t fpos64_t; 90 #endif 91 92 /* The possibilities for the third argument to `setvbuf'. */ 93 #define _IOFBF 0 /* Fully buffered. */ 94 #define _IOLBF 1 /* Line buffered. */ 95 #define _IONBF 2 /* No buffering. */ 96 97 98 /* Default buffer size. */ 99 #define BUFSIZ 8192 100 101 102 /* The value returned by fgetc and similar functions to indicate the 103 end of the file. */ 104 #define EOF (-1) 105 106 107 /* The possibilities for the third argument to `fseek'. 108 These values should not be changed. */ 109 #define SEEK_SET 0 /* Seek from beginning of file. */ 110 #define SEEK_CUR 1 /* Seek from current position. */ 111 #define SEEK_END 2 /* Seek from end of file. */ 112 #ifdef __USE_GNU 113 # define SEEK_DATA 3 /* Seek to next data. */ 114 # define SEEK_HOLE 4 /* Seek to next hole. */ 115 #endif 116 117 118 #if defined __USE_MISC || defined __USE_XOPEN 119 /* Default path prefix for `tempnam' and `tmpnam'. */ 120 # define P_tmpdir "/tmp" 121 #endif 122 123 124 /* Get the values: 125 L_tmpnam How long an array of chars must be to be passed to `tmpnam'. 126 TMP_MAX The minimum number of unique filenames generated by tmpnam 127 (and tempnam when it uses tmpnam's name space), 128 or tempnam (the two are separate). 129 L_ctermid How long an array to pass to `ctermid'. 130 L_cuserid How long an array to pass to `cuserid'. 131 FOPEN_MAX Minimum number of files that can be open at once. 132 FILENAME_MAX Maximum length of a filename. */ 133 #include <bits/stdio_lim.h> 134 135 136 #if __GLIBC_USE (ISOC2X) 137 /* Maximum length of printf output for a NaN. */ 138 # define _PRINTF_NAN_LEN_MAX 4 139 #endif 140 141 142 /* Standard streams. */ 143 extern FILE *stdin; /* Standard input stream. */ 144 extern FILE *stdout; /* Standard output stream. */ 145 extern FILE *stderr; /* Standard error output stream. */ 146 /* C89/C99 say they're macros. Make them happy. */ 147 #define stdin stdin 148 #define stdout stdout 149 #define stderr stderr 150 151 /* Remove file FILENAME. */ 152 extern int remove (const char *__filename) __THROW; 153 /* Rename file OLD to NEW. */ 154 extern int rename (const char *__old, const char *__new) __THROW; 155 156 #ifdef __USE_ATFILE 157 /* Rename file OLD relative to OLDFD to NEW relative to NEWFD. */ 158 extern int renameat (int __oldfd, const char *__old, int __newfd, 159 const char *__new) __THROW; 160 #endif 161 162 #ifdef __USE_GNU 163 /* Flags for renameat2. */ 164 # define RENAME_NOREPLACE (1 << 0) 165 # define RENAME_EXCHANGE (1 << 1) 166 # define RENAME_WHITEOUT (1 << 2) 167 168 /* Rename file OLD relative to OLDFD to NEW relative to NEWFD, with 169 additional flags. */ 170 extern int renameat2 (int __oldfd, const char *__old, int __newfd, 171 const char *__new, unsigned int __flags) __THROW; 172 #endif 173 174 /* Close STREAM. 175 176 This function is a possible cancellation point and therefore not 177 marked with __THROW. */ 178 extern int fclose (FILE *__stream); 179 180 #undef __attr_dealloc_fclose 181 #define __attr_dealloc_fclose __attr_dealloc (fclose, 1) 182 183 /* Create a temporary file and open it read/write. 184 185 This function is a possible cancellation point and therefore not 186 marked with __THROW. */ 187 #ifndef __USE_FILE_OFFSET64 188 extern FILE *tmpfile (void) 189 __attribute_malloc__ __attr_dealloc_fclose __wur; 190 #else 191 # ifdef __REDIRECT 192 extern FILE *__REDIRECT (tmpfile, (void), tmpfile64) 193 __attribute_malloc__ __attr_dealloc_fclose __wur; 194 # else 195 # define tmpfile tmpfile64 196 # endif 197 #endif 198 199 #ifdef __USE_LARGEFILE64 200 extern FILE *tmpfile64 (void) 201 __attribute_malloc__ __attr_dealloc_fclose __wur; 202 #endif 203 204 /* Generate a temporary filename. */ 205 extern char *tmpnam (char[L_tmpnam]) __THROW __wur; 206 207 #ifdef __USE_MISC 208 /* This is the reentrant variant of `tmpnam'. The only difference is 209 that it does not allow S to be NULL. */ 210 extern char *tmpnam_r (char __s[L_tmpnam]) __THROW __wur; 211 #endif 212 213 214 #if defined __USE_MISC || defined __USE_XOPEN 215 /* Generate a unique temporary filename using up to five characters of PFX 216 if it is not NULL. The directory to put this file in is searched for 217 as follows: First the environment variable "TMPDIR" is checked. 218 If it contains the name of a writable directory, that directory is used. 219 If not and if DIR is not NULL, that value is checked. If that fails, 220 P_tmpdir is tried and finally "/tmp". The storage for the filename 221 is allocated by `malloc'. */ 222 extern char *tempnam (const char *__dir, const char *__pfx) 223 __THROW __attribute_malloc__ __wur __attr_dealloc_free; 224 #endif 225 226 /* Flush STREAM, or all streams if STREAM is NULL. 227 228 This function is a possible cancellation point and therefore not 229 marked with __THROW. */ 230 extern int fflush (FILE *__stream); 231 232 #ifdef __USE_MISC 233 /* Faster versions when locking is not required. 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 fflush_unlocked (FILE *__stream); 240 #endif 241 242 #ifdef __USE_GNU 243 /* Close all streams. 244 245 This function is not part of POSIX and therefore no official 246 cancellation point. But due to similarity with an POSIX interface 247 or due to the implementation it is a cancellation point and 248 therefore not marked with __THROW. */ 249 extern int fcloseall (void); 250 #endif 251 252 253 #ifndef __USE_FILE_OFFSET64 254 /* Open a file and create a new stream for it. 255 256 This function is a possible cancellation point and therefore not 257 marked with __THROW. */ 258 extern FILE *fopen (const char *__restrict __filename, 259 const char *__restrict __modes) 260 __attribute_malloc__ __attr_dealloc_fclose __wur; 261 /* Open a file, replacing an existing stream with it. 262 263 This function is a possible cancellation point and therefore not 264 marked with __THROW. */ 265 extern FILE *freopen (const char *__restrict __filename, 266 const char *__restrict __modes, 267 FILE *__restrict __stream) __wur; 268 #else 269 # ifdef __REDIRECT 270 extern FILE *__REDIRECT (fopen, (const char *__restrict __filename, 271 const char *__restrict __modes), fopen64) 272 __attribute_malloc__ __attr_dealloc_fclose __wur; 273 extern FILE *__REDIRECT (freopen, (const char *__restrict __filename, 274 const char *__restrict __modes, 275 FILE *__restrict __stream), freopen64) 276 __wur; 277 # else 278 # define fopen fopen64 279 # define freopen freopen64 280 # endif 281 #endif 282 #ifdef __USE_LARGEFILE64 283 extern FILE *fopen64 (const char *__restrict __filename, 284 const char *__restrict __modes) 285 __attribute_malloc__ __attr_dealloc_fclose __wur; 286 extern FILE *freopen64 (const char *__restrict __filename, 287 const char *__restrict __modes, 288 FILE *__restrict __stream) __wur; 289 #endif 290 291 #ifdef __USE_POSIX 292 /* Create a new stream that refers to an existing system file descriptor. */ 293 extern FILE *fdopen (int __fd, const char *__modes) __THROW 294 __attribute_malloc__ __attr_dealloc_fclose __wur; 295 #endif 296 297 #ifdef __USE_GNU 298 /* Create a new stream that refers to the given magic cookie, 299 and uses the given functions for input and output. */ 300 extern FILE *fopencookie (void *__restrict __magic_cookie, 301 const char *__restrict __modes, 302 cookie_io_functions_t __io_funcs) __THROW 303 __attribute_malloc__ __attr_dealloc_fclose __wur; 304 #endif 305 306 #if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2) 307 /* Create a new stream that refers to a memory buffer. */ 308 extern FILE *fmemopen (void *__s, size_t __len, const char *__modes) 309 __THROW __attribute_malloc__ __attr_dealloc_fclose __wur; 310 311 /* Open a stream that writes into a malloc'd buffer that is expanded as 312 necessary. *BUFLOC and *SIZELOC are updated with the buffer's location 313 and the number of characters written on fflush or fclose. */ 314 extern FILE *open_memstream (char **__bufloc, size_t *__sizeloc) __THROW 315 __attribute_malloc__ __attr_dealloc_fclose __wur; 316 317 #ifdef _WCHAR_H 318 /* Like OPEN_MEMSTREAM, but the stream is wide oriented and produces 319 a wide character string. Declared here only to add attribute malloc 320 and only if <wchar.h> has been previously #included. */ 321 extern __FILE *open_wmemstream (wchar_t **__bufloc, size_t *__sizeloc) __THROW 322 __attribute_malloc__ __attr_dealloc_fclose; 323 # endif 324 #endif 325 326 /* If BUF is NULL, make STREAM unbuffered. 327 Else make it use buffer BUF, of size BUFSIZ. */ 328 extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __THROW; 329 /* Make STREAM use buffering mode MODE. 330 If BUF is not NULL, use N bytes of it for buffering; 331 else allocate an internal buffer N bytes long. */ 332 extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf, 333 int __modes, size_t __n) __THROW; 334 335 #ifdef __USE_MISC 336 /* If BUF is NULL, make STREAM unbuffered. 337 Else make it use SIZE bytes of BUF for buffering. */ 338 extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf, 339 size_t __size) __THROW; 340 341 /* Make STREAM line-buffered. */ 342 extern void setlinebuf (FILE *__stream) __THROW; 343 #endif 344 345 346 /* Write formatted output to STREAM. 347 348 This function is a possible cancellation point and therefore not 349 marked with __THROW. */ 350 extern int fprintf (FILE *__restrict __stream, 351 const char *__restrict __format, ...); 352 /* Write formatted output to stdout. 353 354 This function is a possible cancellation point and therefore not 355 marked with __THROW. */ 356 extern int printf (const char *__restrict __format, ...); 357 /* Write formatted output to S. */ 358 extern int sprintf (char *__restrict __s, 359 const char *__restrict __format, ...) __THROWNL; 360 361 /* Write formatted output to S from argument list ARG. 362 363 This function is a possible cancellation point and therefore not 364 marked with __THROW. */ 365 extern int vfprintf (FILE *__restrict __s, const char *__restrict __format, 366 __gnuc_va_list __arg); 367 /* Write formatted output to stdout from argument list ARG. 368 369 This function is a possible cancellation point and therefore not 370 marked with __THROW. */ 371 extern int vprintf (const char *__restrict __format, __gnuc_va_list __arg); 372 /* Write formatted output to S from argument list ARG. */ 373 extern int vsprintf (char *__restrict __s, const char *__restrict __format, 374 __gnuc_va_list __arg) __THROWNL; 375 376 #if defined __USE_ISOC99 || defined __USE_UNIX98 377 /* Maximum chars of output to write in MAXLEN. */ 378 extern int snprintf (char *__restrict __s, size_t __maxlen, 379 const char *__restrict __format, ...) 380 __THROWNL __attribute__ ((__format__ (__printf__, 3, 4))); 381 382 extern int vsnprintf (char *__restrict __s, size_t __maxlen, 383 const char *__restrict __format, __gnuc_va_list __arg) 384 __THROWNL __attribute__ ((__format__ (__printf__, 3, 0))); 385 #endif 386 387 #if __GLIBC_USE (LIB_EXT2) 388 /* Write formatted output to a string dynamically allocated with `malloc'. 389 Store the address of the string in *PTR. */ 390 extern int vasprintf (char **__restrict __ptr, const char *__restrict __f, 391 __gnuc_va_list __arg) 392 __THROWNL __attribute__ ((__format__ (__printf__, 2, 0))) __wur; 393 extern int __asprintf (char **__restrict __ptr, 394 const char *__restrict __fmt, ...) 395 __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur; 396 extern int asprintf (char **__restrict __ptr, 397 const char *__restrict __fmt, ...) 398 __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur; 399 #endif 400 401 #ifdef __USE_XOPEN2K8 402 /* Write formatted output to a file descriptor. */ 403 extern int vdprintf (int __fd, const char *__restrict __fmt, 404 __gnuc_va_list __arg) 405 __attribute__ ((__format__ (__printf__, 2, 0))); 406 extern int dprintf (int __fd, const char *__restrict __fmt, ...) 407 __attribute__ ((__format__ (__printf__, 2, 3))); 408 #endif 409 410 411 /* Read formatted input from STREAM. 412 413 This function is a possible cancellation point and therefore not 414 marked with __THROW. */ 415 extern int fscanf (FILE *__restrict __stream, 416 const char *__restrict __format, ...) __wur; 417 /* Read formatted input from stdin. 418 419 This function is a possible cancellation point and therefore not 420 marked with __THROW. */ 421 extern int scanf (const char *__restrict __format, ...) __wur; 422 /* Read formatted input from S. */ 423 extern int sscanf (const char *__restrict __s, 424 const char *__restrict __format, ...) __THROW; 425 426 /* For historical reasons, the C99-compliant versions of the scanf 427 functions are at alternative names. When __LDBL_COMPAT or 428 __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI are in effect, this is handled in 429 bits/stdio-ldbl.h. */ 430 #include <bits/floatn.h> 431 #if !__GLIBC_USE (DEPRECATED_SCANF) && !defined __LDBL_COMPAT \ 432 && __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 0 433 # ifdef __REDIRECT 434 extern int __REDIRECT (fscanf, (FILE *__restrict __stream, 435 const char *__restrict __format, ...), 436 __isoc99_fscanf) __wur; 437 extern int __REDIRECT (scanf, (const char *__restrict __format, ...), 438 __isoc99_scanf) __wur; 439 extern int __REDIRECT_NTH (sscanf, (const char *__restrict __s, 440 const char *__restrict __format, ...), 441 __isoc99_sscanf); 442 # else 443 extern int __isoc99_fscanf (FILE *__restrict __stream, 444 const char *__restrict __format, ...) __wur; 445 extern int __isoc99_scanf (const char *__restrict __format, ...) __wur; 446 extern int __isoc99_sscanf (const char *__restrict __s, 447 const char *__restrict __format, ...) __THROW; 448 # define fscanf __isoc99_fscanf 449 # define scanf __isoc99_scanf 450 # define sscanf __isoc99_sscanf 451 # endif 452 #endif 453 454 #ifdef __USE_ISOC99 455 /* Read formatted input from S into argument list ARG. 456 457 This function is a possible cancellation point and therefore not 458 marked with __THROW. */ 459 extern int vfscanf (FILE *__restrict __s, const char *__restrict __format, 460 __gnuc_va_list __arg) 461 __attribute__ ((__format__ (__scanf__, 2, 0))) __wur; 462 463 /* Read formatted input from stdin into argument list ARG. 464 465 This function is a possible cancellation point and therefore not 466 marked with __THROW. */ 467 extern int vscanf (const char *__restrict __format, __gnuc_va_list __arg) 468 __attribute__ ((__format__ (__scanf__, 1, 0))) __wur; 469 470 /* Read formatted input from S into argument list ARG. */ 471 extern int vsscanf (const char *__restrict __s, 472 const char *__restrict __format, __gnuc_va_list __arg) 473 __THROW __attribute__ ((__format__ (__scanf__, 2, 0))); 474 475 /* Same redirection as above for the v*scanf family. */ 476 # if !__GLIBC_USE (DEPRECATED_SCANF) 477 # if defined __REDIRECT && !defined __LDBL_COMPAT \ 478 && __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 0 479 extern int __REDIRECT (vfscanf, 480 (FILE *__restrict __s, 481 const char *__restrict __format, __gnuc_va_list __arg), 482 __isoc99_vfscanf) 483 __attribute__ ((__format__ (__scanf__, 2, 0))) __wur; 484 extern int __REDIRECT (vscanf, (const char *__restrict __format, 485 __gnuc_va_list __arg), __isoc99_vscanf) 486 __attribute__ ((__format__ (__scanf__, 1, 0))) __wur; 487 extern int __REDIRECT_NTH (vsscanf, 488 (const char *__restrict __s, 489 const char *__restrict __format, 490 __gnuc_va_list __arg), __isoc99_vsscanf) 491 __attribute__ ((__format__ (__scanf__, 2, 0))); 492 # elif !defined __REDIRECT 493 extern int __isoc99_vfscanf (FILE *__restrict __s, 494 const char *__restrict __format, 495 __gnuc_va_list __arg) __wur; 496 extern int __isoc99_vscanf (const char *__restrict __format, 497 __gnuc_va_list __arg) __wur; 498 extern int __isoc99_vsscanf (const char *__restrict __s, 499 const char *__restrict __format, 500 __gnuc_va_list __arg) __THROW; 501 # define vfscanf __isoc99_vfscanf 502 # define vscanf __isoc99_vscanf 503 # define vsscanf __isoc99_vsscanf 504 # endif 505 # endif 506 #endif /* Use ISO C9x. */ 507 508 509 /* Read a character from STREAM. 510 511 These functions are possible cancellation points and therefore not 512 marked with __THROW. */ 513 extern int fgetc (FILE *__stream); 514 extern int getc (FILE *__stream); 515 516 /* Read a character from stdin. 517 518 This function is a possible cancellation point and therefore not 519 marked with __THROW. */ 520 extern int getchar (void); 521 522 #ifdef __USE_POSIX199506 523 /* These are defined in POSIX.1:1996. 524 525 These functions are possible cancellation points and therefore not 526 marked with __THROW. */ 527 extern int getc_unlocked (FILE *__stream); 528 extern int getchar_unlocked (void); 529 #endif /* Use POSIX. */ 530 531 #ifdef __USE_MISC 532 /* Faster version when locking is not necessary. 533 534 This function is not part of POSIX and therefore no official 535 cancellation point. But due to similarity with an POSIX interface 536 or due to the implementation it is a cancellation point and 537 therefore not marked with __THROW. */ 538 extern int fgetc_unlocked (FILE *__stream); 539 #endif /* Use MISC. */ 540 541 542 /* Write a character to STREAM. 543 544 These functions are possible cancellation points and therefore not 545 marked with __THROW. 546 547 These functions is a possible cancellation point and therefore not 548 marked with __THROW. */ 549 extern int fputc (int __c, FILE *__stream); 550 extern int putc (int __c, FILE *__stream); 551 552 /* Write a character to stdout. 553 554 This function is a possible cancellation point and therefore not 555 marked with __THROW. */ 556 extern int putchar (int __c); 557 558 #ifdef __USE_MISC 559 /* Faster version when locking is not necessary. 560 561 This function is not part of POSIX and therefore no official 562 cancellation point. But due to similarity with an POSIX interface 563 or due to the implementation it is a cancellation point and 564 therefore not marked with __THROW. */ 565 extern int fputc_unlocked (int __c, FILE *__stream); 566 #endif /* Use MISC. */ 567 568 #ifdef __USE_POSIX199506 569 /* These are defined in POSIX.1:1996. 570 571 These functions are possible cancellation points and therefore not 572 marked with __THROW. */ 573 extern int putc_unlocked (int __c, FILE *__stream); 574 extern int putchar_unlocked (int __c); 575 #endif /* Use POSIX. */ 576 577 578 #if defined __USE_MISC \ 579 || (defined __USE_XOPEN && !defined __USE_XOPEN2K) 580 /* Get a word (int) from STREAM. */ 581 extern int getw (FILE *__stream); 582 583 /* Write a word (int) to STREAM. */ 584 extern int putw (int __w, FILE *__stream); 585 #endif 586 587 588 /* Get a newline-terminated string of finite length from STREAM. 589 590 This function is a possible cancellation point and therefore not 591 marked with __THROW. */ 592 extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream) 593 __wur __fortified_attr_access (__write_only__, 1, 2); 594 595 #if __GLIBC_USE (DEPRECATED_GETS) 596 /* Get a newline-terminated string from stdin, removing the newline. 597 598 This function is impossible to use safely. It has been officially 599 removed from ISO C11 and ISO C++14, and we have also removed it 600 from the _GNU_SOURCE feature list. It remains available when 601 explicitly using an old ISO C, Unix, or POSIX standard. 602 603 This function is a possible cancellation point and therefore not 604 marked with __THROW. */ 605 extern char *gets (char *__s) __wur __attribute_deprecated__; 606 #endif 607 608 #ifdef __USE_GNU 609 /* This function does the same as `fgets' but does not lock the stream. 610 611 This function is not part of POSIX and therefore no official 612 cancellation point. But due to similarity with an POSIX interface 613 or due to the implementation it is a cancellation point and 614 therefore not marked with __THROW. */ 615 extern char *fgets_unlocked (char *__restrict __s, int __n, 616 FILE *__restrict __stream) __wur 617 __fortified_attr_access (__write_only__, 1, 2); 618 #endif 619 620 621 #if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2) 622 /* Read up to (and including) a DELIMITER from STREAM into *LINEPTR 623 (and null-terminate it). *LINEPTR is a pointer returned from malloc (or 624 NULL), pointing to *N characters of space. It is realloc'd as 625 necessary. Returns the number of characters read (not including the 626 null terminator), or -1 on error or EOF. 627 628 These functions are not part of POSIX and therefore no official 629 cancellation point. But due to similarity with an POSIX interface 630 or due to the implementation they are cancellation points and 631 therefore not marked with __THROW. */ 632 extern __ssize_t __getdelim (char **__restrict __lineptr, 633 size_t *__restrict __n, int __delimiter, 634 FILE *__restrict __stream) __wur; 635 extern __ssize_t getdelim (char **__restrict __lineptr, 636 size_t *__restrict __n, int __delimiter, 637 FILE *__restrict __stream) __wur; 638 639 /* Like `getdelim', but reads up to a newline. 640 641 This function is not part of POSIX and therefore no official 642 cancellation point. But due to similarity with an POSIX interface 643 or due to the implementation it is a cancellation point and 644 therefore not marked with __THROW. */ 645 extern __ssize_t getline (char **__restrict __lineptr, 646 size_t *__restrict __n, 647 FILE *__restrict __stream) __wur; 648 #endif 649 650 651 /* Write a string to STREAM. 652 653 This function is a possible cancellation point and therefore not 654 marked with __THROW. */ 655 extern int fputs (const char *__restrict __s, FILE *__restrict __stream); 656 657 /* Write a string, followed by a newline, to stdout. 658 659 This function is a possible cancellation point and therefore not 660 marked with __THROW. */ 661 extern int puts (const char *__s); 662 663 664 /* Push a character back onto the input buffer of STREAM. 665 666 This function is a possible cancellation point and therefore not 667 marked with __THROW. */ 668 extern int ungetc (int __c, FILE *__stream); 669 670 671 /* Read chunks of generic data from STREAM. 672 673 This function is a possible cancellation point and therefore not 674 marked with __THROW. */ 675 extern size_t fread (void *__restrict __ptr, size_t __size, 676 size_t __n, FILE *__restrict __stream) __wur; 677 /* Write chunks of generic data to STREAM. 678 679 This function is a possible cancellation point and therefore not 680 marked with __THROW. */ 681 extern size_t fwrite (const void *__restrict __ptr, size_t __size, 682 size_t __n, FILE *__restrict __s); 683 684 #ifdef __USE_GNU 685 /* This function does the same as `fputs' but does not lock the stream. 686 687 This function is not part of POSIX and therefore no official 688 cancellation point. But due to similarity with an POSIX interface 689 or due to the implementation it is a cancellation point and 690 therefore not marked with __THROW. */ 691 extern int fputs_unlocked (const char *__restrict __s, 692 FILE *__restrict __stream); 693 #endif 694 695 #ifdef __USE_MISC 696 /* Faster versions when locking is not necessary. 697 698 These functions are not part of POSIX and therefore no official 699 cancellation point. But due to similarity with an POSIX interface 700 or due to the implementation they are cancellation points and 701 therefore not marked with __THROW. */ 702 extern size_t fread_unlocked (void *__restrict __ptr, size_t __size, 703 size_t __n, FILE *__restrict __stream) __wur; 704 extern size_t fwrite_unlocked (const void *__restrict __ptr, size_t __size, 705 size_t __n, FILE *__restrict __stream); 706 #endif 707 708 709 /* Seek to a certain position on STREAM. 710 711 This function is a possible cancellation point and therefore not 712 marked with __THROW. */ 713 extern int fseek (FILE *__stream, long int __off, int __whence); 714 /* Return the current position of STREAM. 715 716 This function is a possible cancellation point and therefore not 717 marked with __THROW. */ 718 extern long int ftell (FILE *__stream) __wur; 719 /* Rewind to the beginning of STREAM. 720 721 This function is a possible cancellation point and therefore not 722 marked with __THROW. */ 723 extern void rewind (FILE *__stream); 724 725 /* The Single Unix Specification, Version 2, specifies an alternative, 726 more adequate interface for the two functions above which deal with 727 file offset. `long int' is not the right type. These definitions 728 are originally defined in the Large File Support API. */ 729 730 #if defined __USE_LARGEFILE || defined __USE_XOPEN2K 731 # ifndef __USE_FILE_OFFSET64 732 /* Seek to a certain position on STREAM. 733 734 This function is a possible cancellation point and therefore not 735 marked with __THROW. */ 736 extern int fseeko (FILE *__stream, __off_t __off, int __whence); 737 /* Return the current position of STREAM. 738 739 This function is a possible cancellation point and therefore not 740 marked with __THROW. */ 741 extern __off_t ftello (FILE *__stream) __wur; 742 # else 743 # ifdef __REDIRECT 744 extern int __REDIRECT (fseeko, 745 (FILE *__stream, __off64_t __off, int __whence), 746 fseeko64); 747 extern __off64_t __REDIRECT (ftello, (FILE *__stream), ftello64); 748 # else 749 # define fseeko fseeko64 750 # define ftello ftello64 751 # endif 752 # endif 753 #endif 754 755 #ifndef __USE_FILE_OFFSET64 756 /* Get STREAM's position. 757 758 This function is a possible cancellation point and therefore not 759 marked with __THROW. */ 760 extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos); 761 /* Set STREAM's position. 762 763 This function is a possible cancellation point and therefore not 764 marked with __THROW. */ 765 extern int fsetpos (FILE *__stream, const fpos_t *__pos); 766 #else 767 # ifdef __REDIRECT 768 extern int __REDIRECT (fgetpos, (FILE *__restrict __stream, 769 fpos_t *__restrict __pos), fgetpos64); 770 extern int __REDIRECT (fsetpos, 771 (FILE *__stream, const fpos_t *__pos), fsetpos64); 772 # else 773 # define fgetpos fgetpos64 774 # define fsetpos fsetpos64 775 # endif 776 #endif 777 778 #ifdef __USE_LARGEFILE64 779 extern int fseeko64 (FILE *__stream, __off64_t __off, int __whence); 780 extern __off64_t ftello64 (FILE *__stream) __wur; 781 extern int fgetpos64 (FILE *__restrict __stream, fpos64_t *__restrict __pos); 782 extern int fsetpos64 (FILE *__stream, const fpos64_t *__pos); 783 #endif 784 785 /* Clear the error and EOF indicators for STREAM. */ 786 extern void clearerr (FILE *__stream) __THROW; 787 /* Return the EOF indicator for STREAM. */ 788 extern int feof (FILE *__stream) __THROW __wur; 789 /* Return the error indicator for STREAM. */ 790 extern int ferror (FILE *__stream) __THROW __wur; 791 792 #ifdef __USE_MISC 793 /* Faster versions when locking is not required. */ 794 extern void clearerr_unlocked (FILE *__stream) __THROW; 795 extern int feof_unlocked (FILE *__stream) __THROW __wur; 796 extern int ferror_unlocked (FILE *__stream) __THROW __wur; 797 #endif 798 799 800 /* Print a message describing the meaning of the value of errno. 801 802 This function is a possible cancellation point and therefore not 803 marked with __THROW. */ 804 extern void perror (const char *__s); 805 806 807 #ifdef __USE_POSIX 808 /* Return the system file descriptor for STREAM. */ 809 extern int fileno (FILE *__stream) __THROW __wur; 810 #endif /* Use POSIX. */ 811 812 #ifdef __USE_MISC 813 /* Faster version when locking is not required. */ 814 extern int fileno_unlocked (FILE *__stream) __THROW __wur; 815 #endif 816 817 818 #ifdef __USE_POSIX2 819 /* Close a stream opened by popen and return the status of its child. 820 821 This function is a possible cancellation point and therefore not 822 marked with __THROW. */ 823 extern int pclose (FILE *__stream); 824 825 /* Create a new stream connected to a pipe running the given command. 826 827 This function is a possible cancellation point and therefore not 828 marked with __THROW. */ 829 extern FILE *popen (const char *__command, const char *__modes) 830 __attribute_malloc__ __attr_dealloc (pclose, 1) __wur; 831 832 #endif 833 834 835 #ifdef __USE_POSIX 836 /* Return the name of the controlling terminal. */ 837 extern char *ctermid (char *__s) __THROW 838 __attr_access ((__write_only__, 1)); 839 #endif /* Use POSIX. */ 840 841 842 #if (defined __USE_XOPEN && !defined __USE_XOPEN2K) || defined __USE_GNU 843 /* Return the name of the current user. */ 844 extern char *cuserid (char *__s) 845 __attr_access ((__write_only__, 1)); 846 #endif /* Use X/Open, but not issue 6. */ 847 848 849 #ifdef __USE_GNU 850 struct obstack; /* See <obstack.h>. */ 851 852 /* Write formatted output to an obstack. */ 853 extern int obstack_printf (struct obstack *__restrict __obstack, 854 const char *__restrict __format, ...) 855 __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))); 856 extern int obstack_vprintf (struct obstack *__restrict __obstack, 857 const char *__restrict __format, 858 __gnuc_va_list __args) 859 __THROWNL __attribute__ ((__format__ (__printf__, 2, 0))); 860 #endif /* Use GNU. */ 861 862 863 #ifdef __USE_POSIX199506 864 /* These are defined in POSIX.1:1996. */ 865 866 /* Acquire ownership of STREAM. */ 867 extern void flockfile (FILE *__stream) __THROW; 868 869 /* Try to acquire ownership of STREAM but do not block if it is not 870 possible. */ 871 extern int ftrylockfile (FILE *__stream) __THROW __wur; 872 873 /* Relinquish the ownership granted for STREAM. */ 874 extern void funlockfile (FILE *__stream) __THROW; 875 #endif /* POSIX */ 876 877 #if defined __USE_XOPEN && !defined __USE_XOPEN2K && !defined __USE_GNU 878 /* X/Open Issues 1-5 required getopt to be declared in this 879 header. It was removed in Issue 6. GNU follows Issue 6. */ 880 # include <bits/getopt_posix.h> 881 #endif 882 883 /* Slow-path routines used by the optimized inline functions in 884 bits/stdio.h. */ 885 extern int __uflow (FILE *); 886 extern int __overflow (FILE *, int); 887 888 #if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function 889 /* Declare all functions from bits/stdio2-decl.h first. */ 890 # include <bits/stdio2-decl.h> 891 #endif 892 893 /* The following headers provide asm redirections. These redirections must 894 appear before the first usage of these functions, e.g. in bits/stdio.h. */ 895 #if defined __LDBL_COMPAT || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1 896 # include <bits/stdio-ldbl.h> 897 #endif 898 899 /* If we are compiling with optimizing read this file. It contains 900 several optimizing inline functions and macros. */ 901 #ifdef __USE_EXTERN_INLINES 902 # include <bits/stdio.h> 903 #endif 904 #if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function 905 /* Now include the function definitions and redirects too. */ 906 # include <bits/stdio2.h> 907 #endif 908 909 __END_DECLS 910 911 #endif /* <stdio.h> included. */ 912