libio/stdio.h

   1 /* Define ISO C stdio on top of C++ iostreams.
   2    Copyright (C) 1991, 1994-2012 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    <http://www.gnu.org/licenses/>.  */
  18
  19 /*
  20  *      ISO C99 Standard: 7.19 Input/output     <stdio.h>
  21  */
  22
  23 #ifndef _STDIO_H
  24
  25 #if !defined __need_FILE && !defined __need___FILE
  26 # define _STDIO_H       1
  27 # include <features.h>
  28
  29 __BEGIN_DECLS
  30
  31 # define __need_size_t
  32 # define __need_NULL
  33 # include <stddef.h>
  34
  35 # include <bits/types.h>
  36 # define __need_FILE
  37 # define __need___FILE
  38 #endif /* Don't need FILE.  */
  39
  40
  41 #if !defined __FILE_defined && defined __need_FILE
  42
  43 /* Define outside of namespace so the C++ is happy.  */
  44 struct _IO_FILE;
  45
  46 __BEGIN_NAMESPACE_STD
  47 /* The opaque type of streams.  This is the definition used elsewhere.  */
  48 typedef struct _IO_FILE FILE;
  49 __END_NAMESPACE_STD
  50 #if defined __USE_LARGEFILE64 || defined __USE_SVID || defined __USE_POSIX \
  51     || defined __USE_BSD || defined __USE_ISOC99 || defined __USE_XOPEN \
  52     || defined __USE_POSIX2
  53 __USING_NAMESPACE_STD(FILE)
  54 #endif
  55
  56 # define __FILE_defined 1
  57 #endif /* FILE not defined.  */
  58 #undef  __need_FILE
  59
  60
  61 #if !defined ____FILE_defined && defined __need___FILE
  62
  63 /* The opaque type of streams.  This is the definition used elsewhere.  */
  64 typedef struct _IO_FILE __FILE;
  65
  66 # define ____FILE_defined       1
  67 #endif /* __FILE not defined.  */
  68 #undef  __need___FILE
  69
  70
  71 #ifdef  _STDIO_H
  72 #define _STDIO_USES_IOSTREAM
  73
  74 #include <libio.h>
  75
  76 #if defined __USE_XOPEN || defined __USE_XOPEN2K8
  77 # ifdef __GNUC__
  78 #  ifndef _VA_LIST_DEFINED
  79 typedef _G_va_list va_list;
  80 #   define _VA_LIST_DEFINED
  81 #  endif
  82 # else
  83 #  include <stdarg.h>
  84 # endif
  85 #endif
  86
  87 #ifdef __USE_XOPEN2K8
  88 # ifndef __off_t_defined
  89 # ifndef __USE_FILE_OFFSET64
  90 typedef __off_t off_t;
  91 # else
  92 typedef __off64_t off_t;
  93 # endif
  94 # define __off_t_defined
  95 # endif
  96 # if defined __USE_LARGEFILE64 && !defined __off64_t_defined
  97 typedef __off64_t off64_t;
  98 # define __off64_t_defined
  99 # endif
 100
 101 # ifndef __ssize_t_defined
 102 typedef __ssize_t ssize_t;
 103 # define __ssize_t_defined
 104 # endif
 105 #endif
 106
 107 /* The type of the second argument to `fgetpos' and `fsetpos'.  */
 108 __BEGIN_NAMESPACE_STD
 109 #ifndef __USE_FILE_OFFSET64
 110 typedef _G_fpos_t fpos_t;
 111 #else
 112 typedef _G_fpos64_t fpos_t;
 113 #endif
 114 __END_NAMESPACE_STD
 115 #ifdef __USE_LARGEFILE64
 116 typedef _G_fpos64_t fpos64_t;
 117 #endif
 118
 119 /* The possibilities for the third argument to `setvbuf'.  */
 120 #define _IOFBF 0                /* Fully buffered.  */
 121 #define _IOLBF 1                /* Line buffered.  */
 122 #define _IONBF 2                /* No buffering.  */
 123
 124
 125 /* Default buffer size.  */
 126 #ifndef BUFSIZ
 127 # define BUFSIZ _IO_BUFSIZ
 128 #endif
 129
 130
 131 /* End of file character.
 132    Some things throughout the library rely on this being -1.  */
 133 #ifndef EOF
 134 # define EOF (-1)
 135 #endif
 136
 137
 138 /* The possibilities for the third argument to `fseek'.
 139    These values should not be changed.  */
 140 #define SEEK_SET        0       /* Seek from beginning of file.  */
 141 #define SEEK_CUR        1       /* Seek from current position.  */
 142 #define SEEK_END        2       /* Seek from end of file.  */
 143 #ifdef __USE_GNU
 144 # define SEEK_DATA      3       /* Seek to next data.  */
 145 # define SEEK_HOLE      4       /* Seek to next hole.  */
 146 #endif
 147
 148
 149 #if defined __USE_SVID || defined __USE_XOPEN
 150 /* Default path prefix for `tempnam' and `tmpnam'.  */
 151 # define P_tmpdir       "/tmp"
 152 #endif
 153
 154
 155 /* Get the values:
 156    L_tmpnam     How long an array of chars must be to be passed to `tmpnam'.
 157    TMP_MAX      The minimum number of unique filenames generated by tmpnam
 158                 (and tempnam when it uses tmpnam's name space),
 159                 or tempnam (the two are separate).
 160    L_ctermid    How long an array to pass to `ctermid'.
 161    L_cuserid    How long an array to pass to `cuserid'.
 162    FOPEN_MAX    Minimum number of files that can be open at once.
 163    FILENAME_MAX Maximum length of a filename.  */
 164 #include <bits/stdio_lim.h>
 165
 166
 167 /* Standard streams.  */
 168 extern struct _IO_FILE *stdin;          /* Standard input stream.  */
 169 extern struct _IO_FILE *stdout;         /* Standard output stream.  */
 170 extern struct _IO_FILE *stderr;         /* Standard error output stream.  */
 171 /* C89/C99 say they're macros.  Make them happy.  */
 172 #define stdin stdin
 173 #define stdout stdout
 174 #define stderr stderr
 175
 176 __BEGIN_NAMESPACE_STD
 177 /* Remove file FILENAME.  */
 178 extern int remove (const char *__filename) __THROW;
 179 /* Rename file OLD to NEW.  */
 180 extern int rename (const char *__old, const char *__new) __THROW;
 181 __END_NAMESPACE_STD
 182
 183 #ifdef __USE_ATFILE
 184 /* Rename file OLD relative to OLDFD to NEW relative to NEWFD.  */
 185 extern int renameat (int __oldfd, const char *__old, int __newfd,
 186                      const char *__new) __THROW;
 187 #endif
 188
 189 __BEGIN_NAMESPACE_STD
 190 /* Create a temporary file and open it read/write.
 191
 192    This function is a possible cancellation point and therefore not
 193    marked with __THROW.  */
 194 #ifndef __USE_FILE_OFFSET64
 195 extern FILE *tmpfile (void) __wur;
 196 #else
 197 # ifdef __REDIRECT
 198 extern FILE *__REDIRECT (tmpfile, (void), tmpfile64) __wur;
 199 # else
 200 #  define tmpfile tmpfile64
 201 # endif
 202 #endif
 203
 204 #ifdef __USE_LARGEFILE64
 205 extern FILE *tmpfile64 (void) __wur;
 206 #endif
 207
 208 /* Generate a temporary filename.  */
 209 extern char *tmpnam (char *__s) __THROW __wur;
 210 __END_NAMESPACE_STD
 211
 212 #ifdef __USE_MISC
 213 /* This is the reentrant variant of `tmpnam'.  The only difference is
 214    that it does not allow S to be NULL.  */
 215 extern char *tmpnam_r (char *__s) __THROW __wur;
 216 #endif
 217
 218
 219 #if defined __USE_SVID || defined __USE_XOPEN
 220 /* Generate a unique temporary filename using up to five characters of PFX
 221    if it is not NULL.  The directory to put this file in is searched for
 222    as follows: First the environment variable "TMPDIR" is checked.
 223    If it contains the name of a writable directory, that directory is used.
 224    If not and if DIR is not NULL, that value is checked.  If that fails,
 225    P_tmpdir is tried and finally "/tmp".  The storage for the filename
 226    is allocated by `malloc'.  */
 227 extern char *tempnam (const char *__dir, const char *__pfx)
 228      __THROW __attribute_malloc__ __wur;
 229 #endif
 230
 231
 232 __BEGIN_NAMESPACE_STD
 233 /* Close STREAM.
 234
 235    This function is a possible cancellation point and therefore not
 236    marked with __THROW.  */
 237 extern int fclose (FILE *__stream);
 238 /* Flush STREAM, or all streams if STREAM is NULL.
 239
 240    This function is a possible cancellation point and therefore not
 241    marked with __THROW.  */
 242 extern int fflush (FILE *__stream);
 243 __END_NAMESPACE_STD
 244
 245 #ifdef __USE_MISC
 246 /* Faster versions when locking is not required.
 247
 248    This function is not part of POSIX and therefore no official
 249    cancellation point.  But due to similarity with an POSIX interface
 250    or due to the implementation it is a cancellation point and
 251    therefore not marked with __THROW.  */
 252 extern int fflush_unlocked (FILE *__stream);
 253 #endif
 254
 255 #ifdef __USE_GNU
 256 /* Close all streams.
 257
 258    This function is not part of POSIX and therefore no official
 259    cancellation point.  But due to similarity with an POSIX interface
 260    or due to the implementation it is a cancellation point and
 261    therefore not marked with __THROW.  */
 262 extern int fcloseall (void);
 263 #endif
 264
 265
 266 __BEGIN_NAMESPACE_STD
 267 #ifndef __USE_FILE_OFFSET64
 268 /* Open a file and create a new stream for it.
 269
 270    This function is a possible cancellation point and therefore not
 271    marked with __THROW.  */
 272 extern FILE *fopen (const char *__restrict __filename,
 273                     const char *__restrict __modes) __wur;
 274 /* Open a file, replacing an existing stream with it.
 275
 276    This function is a possible cancellation point and therefore not
 277    marked with __THROW.  */
 278 extern FILE *freopen (const char *__restrict __filename,
 279                       const char *__restrict __modes,
 280                       FILE *__restrict __stream) __wur;
 281 #else
 282 # ifdef __REDIRECT
 283 extern FILE *__REDIRECT (fopen, (const char *__restrict __filename,
 284                                  const char *__restrict __modes), fopen64)
 285   __wur;
 286 extern FILE *__REDIRECT (freopen, (const char *__restrict __filename,
 287                                    const char *__restrict __modes,
 288                                    FILE *__restrict __stream), freopen64)
 289   __wur;
 290 # else
 291 #  define fopen fopen64
 292 #  define freopen freopen64
 293 # endif
 294 #endif
 295 __END_NAMESPACE_STD
 296 #ifdef __USE_LARGEFILE64
 297 extern FILE *fopen64 (const char *__restrict __filename,
 298                       const char *__restrict __modes) __wur;
 299 extern FILE *freopen64 (const char *__restrict __filename,
 300                         const char *__restrict __modes,
 301                         FILE *__restrict __stream) __wur;
 302 #endif
 303
 304 #ifdef  __USE_POSIX
 305 /* Create a new stream that refers to an existing system file descriptor.  */
 306 extern FILE *fdopen (int __fd, const char *__modes) __THROW __wur;
 307 #endif
 308
 309 #ifdef  __USE_GNU
 310 /* Create a new stream that refers to the given magic cookie,
 311    and uses the given functions for input and output.  */
 312 extern FILE *fopencookie (void *__restrict __magic_cookie,
 313                           const char *__restrict __modes,
 314                           _IO_cookie_io_functions_t __io_funcs) __THROW __wur;
 315 #endif
 316
 317 #ifdef __USE_XOPEN2K8
 318 /* Create a new stream that refers to a memory buffer.  */
 319 extern FILE *fmemopen (void *__s, size_t __len, const char *__modes)
 320   __THROW __wur;
 321
 322 /* Open a stream that writes into a malloc'd buffer that is expanded as
 323    necessary.  *BUFLOC and *SIZELOC are updated with the buffer's location
 324    and the number of characters written on fflush or fclose.  */
 325 extern FILE *open_memstream (char **__bufloc, size_t *__sizeloc) __THROW __wur;
 326 #endif
 327
 328
 329 __BEGIN_NAMESPACE_STD
 330 /* If BUF is NULL, make STREAM unbuffered.
 331    Else make it use buffer BUF, of size BUFSIZ.  */
 332 extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __THROW;
 333 /* Make STREAM use buffering mode MODE.
 334    If BUF is not NULL, use N bytes of it for buffering;
 335    else allocate an internal buffer N bytes long.  */
 336 extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf,
 337                     int __modes, size_t __n) __THROW;
 338 __END_NAMESPACE_STD
 339
 340 #ifdef  __USE_BSD
 341 /* If BUF is NULL, make STREAM unbuffered.
 342    Else make it use SIZE bytes of BUF for buffering.  */
 343 extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf,
 344                        size_t __size) __THROW;
 345
 346 /* Make STREAM line-buffered.  */
 347 extern void setlinebuf (FILE *__stream) __THROW;
 348 #endif
 349
 350
 351 __BEGIN_NAMESPACE_STD
 352 /* Write formatted output to STREAM.
 353
 354    This function is a possible cancellation point and therefore not
 355    marked with __THROW.  */
 356 extern int fprintf (FILE *__restrict __stream,
 357                     const char *__restrict __format, ...);
 358 /* Write formatted output to stdout.
 359
 360    This function is a possible cancellation point and therefore not
 361    marked with __THROW.  */
 362 extern int printf (const char *__restrict __format, ...);
 363 /* Write formatted output to S.  */
 364 extern int sprintf (char *__restrict __s,
 365                     const char *__restrict __format, ...) __THROWNL;
 366
 367 /* Write formatted output to S from argument list ARG.
 368
 369    This function is a possible cancellation point and therefore not
 370    marked with __THROW.  */
 371 extern int vfprintf (FILE *__restrict __s, const char *__restrict __format,
 372                      _G_va_list __arg);
 373 /* Write formatted output to stdout from argument list ARG.
 374
 375    This function is a possible cancellation point and therefore not
 376    marked with __THROW.  */
 377 extern int vprintf (const char *__restrict __format, _G_va_list __arg);
 378 /* Write formatted output to S from argument list ARG.  */
 379 extern int vsprintf (char *__restrict __s, const char *__restrict __format,
 380                      _G_va_list __arg) __THROWNL;
 381 __END_NAMESPACE_STD
 382
 383 #if defined __USE_BSD || defined __USE_ISOC99 || defined __USE_UNIX98
 384 __BEGIN_NAMESPACE_C99
 385 /* Maximum chars of output to write in MAXLEN.  */
 386 extern int snprintf (char *__restrict __s, size_t __maxlen,
 387                      const char *__restrict __format, ...)
 388      __THROWNL __attribute__ ((__format__ (__printf__, 3, 4)));
 389
 390 extern int vsnprintf (char *__restrict __s, size_t __maxlen,
 391                       const char *__restrict __format, _G_va_list __arg)
 392      __THROWNL __attribute__ ((__format__ (__printf__, 3, 0)));
 393 __END_NAMESPACE_C99
 394 #endif
 395
 396 #ifdef __USE_GNU
 397 /* Write formatted output to a string dynamically allocated with `malloc'.
 398    Store the address of the string in *PTR.  */
 399 extern int vasprintf (char **__restrict __ptr, const char *__restrict __f,
 400                       _G_va_list __arg)
 401      __THROWNL __attribute__ ((__format__ (__printf__, 2, 0))) __wur;
 402 extern int __asprintf (char **__restrict __ptr,
 403                        const char *__restrict __fmt, ...)
 404      __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur;
 405 extern int asprintf (char **__restrict __ptr,
 406                      const char *__restrict __fmt, ...)
 407      __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur;
 408 #endif
 409
 410 #ifdef __USE_XOPEN2K8
 411 /* Write formatted output to a file descriptor.  */
 412 extern int vdprintf (int __fd, const char *__restrict __fmt,
 413                      _G_va_list __arg)
 414      __attribute__ ((__format__ (__printf__, 2, 0)));
 415 extern int dprintf (int __fd, const char *__restrict __fmt, ...)
 416      __attribute__ ((__format__ (__printf__, 2, 3)));
 417 #endif
 418
 419
 420 __BEGIN_NAMESPACE_STD
 421 /* Read formatted input from STREAM.
 422
 423    This function is a possible cancellation point and therefore not
 424    marked with __THROW.  */
 425 extern int fscanf (FILE *__restrict __stream,
 426                    const char *__restrict __format, ...) __wur;
 427 /* Read formatted input from stdin.
 428
 429    This function is a possible cancellation point and therefore not
 430    marked with __THROW.  */
 431 extern int scanf (const char *__restrict __format, ...) __wur;
 432 /* Read formatted input from S.  */
 433 extern int sscanf (const char *__restrict __s,
 434                    const char *__restrict __format, ...) __THROW;
 435
 436 #if defined __USE_ISOC99 && !defined __USE_GNU \
 437     && (!defined __LDBL_COMPAT || !defined __REDIRECT) \
 438     && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K)
 439 # ifdef __REDIRECT
 440 /* For strict ISO C99 or POSIX compliance disallow %as, %aS and %a[
 441    GNU extension which conflicts with valid %a followed by letter
 442    s, S or [.  */
 443 extern int __REDIRECT (fscanf, (FILE *__restrict __stream,
 444                                 const char *__restrict __format, ...),
 445                        __isoc99_fscanf) __wur;
 446 extern int __REDIRECT (scanf, (const char *__restrict __format, ...),
 447                        __isoc99_scanf) __wur;
 448 extern int __REDIRECT_NTH (sscanf, (const char *__restrict __s,
 449                                     const char *__restrict __format, ...),
 450                            __isoc99_sscanf);
 451 # else
 452 extern int __isoc99_fscanf (FILE *__restrict __stream,
 453                             const char *__restrict __format, ...) __wur;
 454 extern int __isoc99_scanf (const char *__restrict __format, ...) __wur;
 455 extern int __isoc99_sscanf (const char *__restrict __s,
 456                             const char *__restrict __format, ...) __THROW;
 457 #  define fscanf __isoc99_fscanf
 458 #  define scanf __isoc99_scanf
 459 #  define sscanf __isoc99_sscanf
 460 # endif
 461 #endif
 462
 463 __END_NAMESPACE_STD
 464
 465 #ifdef  __USE_ISOC99
 466 __BEGIN_NAMESPACE_C99
 467 /* Read formatted input from S into argument list ARG.
 468
 469    This function is a possible cancellation point and therefore not
 470    marked with __THROW.  */
 471 extern int vfscanf (FILE *__restrict __s, const char *__restrict __format,
 472                     _G_va_list __arg)
 473      __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
 474
 475 /* Read formatted input from stdin into argument list ARG.
 476
 477    This function is a possible cancellation point and therefore not
 478    marked with __THROW.  */
 479 extern int vscanf (const char *__restrict __format, _G_va_list __arg)
 480      __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
 481
 482 /* Read formatted input from S into argument list ARG.  */
 483 extern int vsscanf (const char *__restrict __s,
 484                     const char *__restrict __format, _G_va_list __arg)
 485      __THROW __attribute__ ((__format__ (__scanf__, 2, 0)));
 486
 487 # if !defined __USE_GNU \
 488      && (!defined __LDBL_COMPAT || !defined __REDIRECT) \
 489      && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K)
 490 #  ifdef __REDIRECT
 491 /* For strict ISO C99 or POSIX compliance disallow %as, %aS and %a[
 492    GNU extension which conflicts with valid %a followed by letter
 493    s, S or [.  */
 494 extern int __REDIRECT (vfscanf,
 495                        (FILE *__restrict __s,
 496                         const char *__restrict __format, _G_va_list __arg),
 497                        __isoc99_vfscanf)
 498      __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
 499 extern int __REDIRECT (vscanf, (const char *__restrict __format,
 500                                 _G_va_list __arg), __isoc99_vscanf)
 501      __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
 502 extern int __REDIRECT_NTH (vsscanf,
 503                            (const char *__restrict __s,
 504                             const char *__restrict __format,
 505                             _G_va_list __arg), __isoc99_vsscanf)
 506      __attribute__ ((__format__ (__scanf__, 2, 0)));
 507 #  else
 508 extern int __isoc99_vfscanf (FILE *__restrict __s,
 509                              const char *__restrict __format,
 510                              _G_va_list __arg) __wur;
 511 extern int __isoc99_vscanf (const char *__restrict __format,
 512                             _G_va_list __arg) __wur;
 513 extern int __isoc99_vsscanf (const char *__restrict __s,
 514                              const char *__restrict __format,
 515                              _G_va_list __arg) __THROW;
 516 #   define vfscanf __isoc99_vfscanf
 517 #   define vscanf __isoc99_vscanf
 518 #   define vsscanf __isoc99_vsscanf
 519 #  endif
 520 # endif
 521
 522 __END_NAMESPACE_C99
 523 #endif /* Use ISO C9x.  */
 524
 525
 526 __BEGIN_NAMESPACE_STD
 527 /* Read a character from STREAM.
 528
 529    These functions are possible cancellation points and therefore not
 530    marked with __THROW.  */
 531 extern int fgetc (FILE *__stream);
 532 extern int getc (FILE *__stream);
 533
 534 /* Read a character from stdin.
 535
 536    This function is a possible cancellation point and therefore not
 537    marked with __THROW.  */
 538 extern int getchar (void);
 539 __END_NAMESPACE_STD
 540
 541 /* The C standard explicitly says this is a macro, so we always do the
 542    optimization for it.  */
 543 #define getc(_fp) _IO_getc (_fp)
 544
 545 #if defined __USE_POSIX || defined __USE_MISC
 546 /* These are defined in POSIX.1:1996.
 547
 548    These functions are possible cancellation points and therefore not
 549    marked with __THROW.  */
 550 extern int getc_unlocked (FILE *__stream);
 551 extern int getchar_unlocked (void);
 552 #endif /* Use POSIX or MISC.  */
 553
 554 #ifdef __USE_MISC
 555 /* Faster version when locking is not necessary.
 556
 557    This function is not part of POSIX and therefore no official
 558    cancellation point.  But due to similarity with an POSIX interface
 559    or due to the implementation it is a cancellation point and
 560    therefore not marked with __THROW.  */
 561 extern int fgetc_unlocked (FILE *__stream);
 562 #endif /* Use MISC.  */
 563
 564
 565 __BEGIN_NAMESPACE_STD
 566 /* Write a character to STREAM.
 567
 568    These functions are possible cancellation points and therefore not
 569    marked with __THROW.
 570
 571    These functions is a possible cancellation point and therefore not
 572    marked with __THROW.  */
 573 extern int fputc (int __c, FILE *__stream);
 574 extern int putc (int __c, FILE *__stream);
 575
 576 /* Write a character to stdout.
 577
 578    This function is a possible cancellation point and therefore not
 579    marked with __THROW.  */
 580 extern int putchar (int __c);
 581 __END_NAMESPACE_STD
 582
 583 /* The C standard explicitly says this can be a macro,
 584    so we always do the optimization for it.  */
 585 #define putc(_ch, _fp) _IO_putc (_ch, _fp)
 586
 587 #ifdef __USE_MISC
 588 /* Faster version when locking is not necessary.
 589
 590    This function is not part of POSIX and therefore no official
 591    cancellation point.  But due to similarity with an POSIX interface
 592    or due to the implementation it is a cancellation point and
 593    therefore not marked with __THROW.  */
 594 extern int fputc_unlocked (int __c, FILE *__stream);
 595 #endif /* Use MISC.  */
 596
 597 #if defined __USE_POSIX || defined __USE_MISC
 598 /* These are defined in POSIX.1:1996.
 599
 600    These functions are possible cancellation points and therefore not
 601    marked with __THROW.  */
 602 extern int putc_unlocked (int __c, FILE *__stream);
 603 extern int putchar_unlocked (int __c);
 604 #endif /* Use POSIX or MISC.  */
 605
 606
 607 #if defined __USE_SVID || defined __USE_MISC \
 608     || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
 609 /* Get a word (int) from STREAM.  */
 610 extern int getw (FILE *__stream);
 611
 612 /* Write a word (int) to STREAM.  */
 613 extern int putw (int __w, FILE *__stream);
 614 #endif
 615
 616
 617 __BEGIN_NAMESPACE_STD
 618 /* Get a newline-terminated string of finite length from STREAM.
 619
 620    This function is a possible cancellation point and therefore not
 621    marked with __THROW.  */
 622 extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
 623      __wur;
 624
 625 #if !defined __USE_ISOC11 \
 626     || (defined __cplusplus && __cplusplus <= 201103L)
 627 /* Get a newline-terminated string from stdin, removing the newline.
 628    DO NOT USE THIS FUNCTION!!  There is no limit on how much it will read.
 629
 630    The function has been officially removed in ISO C11.  This opportunity
 631    is used to also remove it from the GNU feature list.  It is now only
 632    available when explicitly using an old ISO C, Unix, or POSIX standard.
 633    GCC defines _GNU_SOURCE when building C++ code and the function is still
 634    in C++11, so it is also available for C++.
 635
 636    This function is a possible cancellation point and therefore not
 637    marked with __THROW.  */
 638 extern char *gets (char *__s) __wur __attribute_deprecated__;
 639 #endif
 640 __END_NAMESPACE_STD
 641
 642 #ifdef __USE_GNU
 643 /* This function does the same as `fgets' but does not lock the stream.
 644
 645    This function is not part of POSIX and therefore no official
 646    cancellation point.  But due to similarity with an POSIX interface
 647    or due to the implementation it is a cancellation point and
 648    therefore not marked with __THROW.  */
 649 extern char *fgets_unlocked (char *__restrict __s, int __n,
 650                              FILE *__restrict __stream) __wur;
 651 #endif
 652
 653
 654 #ifdef  __USE_XOPEN2K8
 655 /* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
 656    (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
 657    NULL), pointing to *N characters of space.  It is realloc'd as
 658    necessary.  Returns the number of characters read (not including the
 659    null terminator), or -1 on error or EOF.
 660
 661    These functions are not part of POSIX and therefore no official
 662    cancellation point.  But due to similarity with an POSIX interface
 663    or due to the implementation they are cancellation points and
 664    therefore not marked with __THROW.  */
 665 extern _IO_ssize_t __getdelim (char **__restrict __lineptr,
 666                                size_t *__restrict __n, int __delimiter,
 667                                FILE *__restrict __stream) __wur;
 668 extern _IO_ssize_t getdelim (char **__restrict __lineptr,
 669                              size_t *__restrict __n, int __delimiter,
 670                              FILE *__restrict __stream) __wur;
 671
 672 /* Like `getdelim', but reads up to a newline.
 673
 674    This function is not part of POSIX and therefore no official
 675    cancellation point.  But due to similarity with an POSIX interface
 676    or due to the implementation it is a cancellation point and
 677    therefore not marked with __THROW.  */
 678 extern _IO_ssize_t getline (char **__restrict __lineptr,
 679                             size_t *__restrict __n,
 680                             FILE *__restrict __stream) __wur;
 681 #endif
 682
 683
 684 __BEGIN_NAMESPACE_STD
 685 /* Write a string to STREAM.
 686
 687    This function is a possible cancellation point and therefore not
 688    marked with __THROW.  */
 689 extern int fputs (const char *__restrict __s, FILE *__restrict __stream);
 690
 691 /* Write a string, followed by a newline, to stdout.
 692
 693    This function is a possible cancellation point and therefore not
 694    marked with __THROW.  */
 695 extern int puts (const char *__s);
 696
 697
 698 /* Push a character back onto the input buffer of STREAM.
 699
 700    This function is a possible cancellation point and therefore not
 701    marked with __THROW.  */
 702 extern int ungetc (int __c, FILE *__stream);
 703
 704
 705 /* Read chunks of generic data from STREAM.
 706
 707    This function is a possible cancellation point and therefore not
 708    marked with __THROW.  */
 709 extern size_t fread (void *__restrict __ptr, size_t __size,
 710                      size_t __n, FILE *__restrict __stream) __wur;
 711 /* Write chunks of generic data to STREAM.
 712
 713    This function is a possible cancellation point and therefore not
 714    marked with __THROW.  */
 715 extern size_t fwrite (const void *__restrict __ptr, size_t __size,
 716                       size_t __n, FILE *__restrict __s);
 717 __END_NAMESPACE_STD
 718
 719 #ifdef __USE_GNU
 720 /* This function does the same as `fputs' but does not lock the stream.
 721
 722    This function is not part of POSIX and therefore no official
 723    cancellation point.  But due to similarity with an POSIX interface
 724    or due to the implementation it is a cancellation point and
 725    therefore not marked with __THROW.  */
 726 extern int fputs_unlocked (const char *__restrict __s,
 727                            FILE *__restrict __stream);
 728 #endif
 729
 730 #ifdef __USE_MISC
 731 /* Faster versions when locking is not necessary.
 732
 733    These functions are not part of POSIX and therefore no official
 734    cancellation point.  But due to similarity with an POSIX interface
 735    or due to the implementation they are cancellation points and
 736    therefore not marked with __THROW.  */
 737 extern size_t fread_unlocked (void *__restrict __ptr, size_t __size,
 738                               size_t __n, FILE *__restrict __stream) __wur;
 739 extern size_t fwrite_unlocked (const void *__restrict __ptr, size_t __size,
 740                                size_t __n, FILE *__restrict __stream);
 741 #endif
 742
 743
 744 __BEGIN_NAMESPACE_STD
 745 /* Seek to a certain position on STREAM.
 746
 747    This function is a possible cancellation point and therefore not
 748    marked with __THROW.  */
 749 extern int fseek (FILE *__stream, long int __off, int __whence);
 750 /* Return the current position of STREAM.
 751
 752    This function is a possible cancellation point and therefore not
 753    marked with __THROW.  */
 754 extern long int ftell (FILE *__stream) __wur;
 755 /* Rewind to the beginning of STREAM.
 756
 757    This function is a possible cancellation point and therefore not
 758    marked with __THROW.  */
 759 extern void rewind (FILE *__stream);
 760 __END_NAMESPACE_STD
 761
 762 /* The Single Unix Specification, Version 2, specifies an alternative,
 763    more adequate interface for the two functions above which deal with
 764    file offset.  `long int' is not the right type.  These definitions
 765    are originally defined in the Large File Support API.  */
 766
 767 #if defined __USE_LARGEFILE || defined __USE_XOPEN2K
 768 # ifndef __USE_FILE_OFFSET64
 769 /* Seek to a certain position on STREAM.
 770
 771    This function is a possible cancellation point and therefore not
 772    marked with __THROW.  */
 773 extern int fseeko (FILE *__stream, __off_t __off, int __whence);
 774 /* Return the current position of STREAM.
 775
 776    This function is a possible cancellation point and therefore not
 777    marked with __THROW.  */
 778 extern __off_t ftello (FILE *__stream) __wur;
 779 # else
 780 #  ifdef __REDIRECT
 781 extern int __REDIRECT (fseeko,
 782                        (FILE *__stream, __off64_t __off, int __whence),
 783                        fseeko64);
 784 extern __off64_t __REDIRECT (ftello, (FILE *__stream), ftello64);
 785 #  else
 786 #   define fseeko fseeko64
 787 #   define ftello ftello64
 788 #  endif
 789 # endif
 790 #endif
 791
 792 __BEGIN_NAMESPACE_STD
 793 #ifndef __USE_FILE_OFFSET64
 794 /* Get STREAM's position.
 795
 796    This function is a possible cancellation point and therefore not
 797    marked with __THROW.  */
 798 extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos);
 799 /* Set STREAM's position.
 800
 801    This function is a possible cancellation point and therefore not
 802    marked with __THROW.  */
 803 extern int fsetpos (FILE *__stream, const fpos_t *__pos);
 804 #else
 805 # ifdef __REDIRECT
 806 extern int __REDIRECT (fgetpos, (FILE *__restrict __stream,
 807                                  fpos_t *__restrict __pos), fgetpos64);
 808 extern int __REDIRECT (fsetpos,
 809                        (FILE *__stream, const fpos_t *__pos), fsetpos64);
 810 # else
 811 #  define fgetpos fgetpos64
 812 #  define fsetpos fsetpos64
 813 # endif
 814 #endif
 815 __END_NAMESPACE_STD
 816
 817 #ifdef __USE_LARGEFILE64
 818 extern int fseeko64 (FILE *__stream, __off64_t __off, int __whence);
 819 extern __off64_t ftello64 (FILE *__stream) __wur;
 820 extern int fgetpos64 (FILE *__restrict __stream, fpos64_t *__restrict __pos);
 821 extern int fsetpos64 (FILE *__stream, const fpos64_t *__pos);
 822 #endif
 823
 824 __BEGIN_NAMESPACE_STD
 825 /* Clear the error and EOF indicators for STREAM.  */
 826 extern void clearerr (FILE *__stream) __THROW;
 827 /* Return the EOF indicator for STREAM.  */
 828 extern int feof (FILE *__stream) __THROW __wur;
 829 /* Return the error indicator for STREAM.  */
 830 extern int ferror (FILE *__stream) __THROW __wur;
 831 __END_NAMESPACE_STD
 832
 833 #ifdef __USE_MISC
 834 /* Faster versions when locking is not required.  */
 835 extern void clearerr_unlocked (FILE *__stream) __THROW;
 836 extern int feof_unlocked (FILE *__stream) __THROW __wur;
 837 extern int ferror_unlocked (FILE *__stream) __THROW __wur;
 838 #endif
 839
 840
 841 __BEGIN_NAMESPACE_STD
 842 /* Print a message describing the meaning of the value of errno.
 843
 844    This function is a possible cancellation point and therefore not
 845    marked with __THROW.  */
 846 extern void perror (const char *__s);
 847 __END_NAMESPACE_STD
 848
 849 /* Provide the declarations for `sys_errlist' and `sys_nerr' if they
 850    are available on this system.  Even if available, these variables
 851    should not be used directly.  The `strerror' function provides
 852    all the necessary functionality.  */
 853 #include <bits/sys_errlist.h>
 854
 855
 856 #ifdef  __USE_POSIX
 857 /* Return the system file descriptor for STREAM.  */
 858 extern int fileno (FILE *__stream) __THROW __wur;
 859 #endif /* Use POSIX.  */
 860
 861 #ifdef __USE_MISC
 862 /* Faster version when locking is not required.  */
 863 extern int fileno_unlocked (FILE *__stream) __THROW __wur;
 864 #endif
 865
 866
 867 #if (defined __USE_POSIX2 || defined __USE_SVID  || defined __USE_BSD || \
 868      defined __USE_MISC)
 869 /* Create a new stream connected to a pipe running the given command.
 870
 871    This function is a possible cancellation point and therefore not
 872    marked with __THROW.  */
 873 extern FILE *popen (const char *__command, const char *__modes) __wur;
 874
 875 /* Close a stream opened by popen and return the status of its child.
 876
 877    This function is a possible cancellation point and therefore not
 878    marked with __THROW.  */
 879 extern int pclose (FILE *__stream);
 880 #endif
 881
 882
 883 #ifdef  __USE_POSIX
 884 /* Return the name of the controlling terminal.  */
 885 extern char *ctermid (char *__s) __THROW;
 886 #endif /* Use POSIX.  */
 887
 888
 889 #ifdef __USE_XOPEN
 890 /* Return the name of the current user.  */
 891 extern char *cuserid (char *__s);
 892 #endif /* Use X/Open, but not issue 6.  */
 893
 894
 895 #ifdef  __USE_GNU
 896 struct obstack;                 /* See <obstack.h>.  */
 897
 898 /* Write formatted output to an obstack.  */
 899 extern int obstack_printf (struct obstack *__restrict __obstack,
 900                            const char *__restrict __format, ...)
 901      __THROWNL __attribute__ ((__format__ (__printf__, 2, 3)));
 902 extern int obstack_vprintf (struct obstack *__restrict __obstack,
 903                             const char *__restrict __format,
 904                             _G_va_list __args)
 905      __THROWNL __attribute__ ((__format__ (__printf__, 2, 0)));
 906 #endif /* Use GNU.  */
 907
 908
 909 #if defined __USE_POSIX || defined __USE_MISC
 910 /* These are defined in POSIX.1:1996.  */
 911
 912 /* Acquire ownership of STREAM.  */
 913 extern void flockfile (FILE *__stream) __THROW;
 914
 915 /* Try to acquire ownership of STREAM but do not block if it is not
 916    possible.  */
 917 extern int ftrylockfile (FILE *__stream) __THROW __wur;
 918
 919 /* Relinquish the ownership granted for STREAM.  */
 920 extern void funlockfile (FILE *__stream) __THROW;
 921 #endif /* POSIX || misc */
 922
 923 #if defined __USE_XOPEN && !defined __USE_XOPEN2K && !defined __USE_GNU
 924 /* The X/Open standard requires some functions and variables to be
 925    declared here which do not belong into this header.  But we have to
 926    follow.  In GNU mode we don't do this nonsense.  */
 927 # define __need_getopt
 928 # include <getopt.h>
 929 #endif  /* X/Open, but not issue 6 and not for GNU.  */
 930
 931 /* If we are compiling with optimizing read this file.  It contains
 932    several optimizing inline functions and macros.  */
 933 #ifdef __USE_EXTERN_INLINES
 934 # include <bits/stdio.h>
 935 #endif
 936 #if __USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline
 937 # include <bits/stdio2.h>
 938 #endif
 939 #ifdef __LDBL_COMPAT
 940 # include <bits/stdio-ldbl.h>
 941 #endif
 942
 943 __END_DECLS
 944
 945 #endif /* <stdio.h> included.  */
 946
 947 #endif /* !_STDIO_H */