libio/stdio.h

   1 /* Define ISO C stdio on top of C++ iostreams.
   2    Copyright (C) 1991, 1994-2011, 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
 413    These functions are not part of POSIX and therefore no official
 414    cancellation point.  But due to similarity with an POSIX interface
 415    or due to the implementation they are cancellation points and
 416    therefore not marked with __THROW.  */
 417 extern int vdprintf (int __fd, const char *__restrict __fmt,
 418                      _G_va_list __arg)
 419      __attribute__ ((__format__ (__printf__, 2, 0)));
 420 extern int dprintf (int __fd, const char *__restrict __fmt, ...)
 421      __attribute__ ((__format__ (__printf__, 2, 3)));
 422 #endif
 423
 424
 425 __BEGIN_NAMESPACE_STD
 426 /* Read formatted input from STREAM.
 427
 428    This function is a possible cancellation point and therefore not
 429    marked with __THROW.  */
 430 extern int fscanf (FILE *__restrict __stream,
 431                    const char *__restrict __format, ...) __wur;
 432 /* Read formatted input from stdin.
 433
 434    This function is a possible cancellation point and therefore not
 435    marked with __THROW.  */
 436 extern int scanf (const char *__restrict __format, ...) __wur;
 437 /* Read formatted input from S.  */
 438 extern int sscanf (const char *__restrict __s,
 439                    const char *__restrict __format, ...) __THROW;
 440
 441 #if defined __USE_ISOC99 && !defined __USE_GNU \
 442     && (!defined __LDBL_COMPAT || !defined __REDIRECT) \
 443     && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K)
 444 # ifdef __REDIRECT
 445 /* For strict ISO C99 or POSIX compliance disallow %as, %aS and %a[
 446    GNU extension which conflicts with valid %a followed by letter
 447    s, S or [.  */
 448 extern int __REDIRECT (fscanf, (FILE *__restrict __stream,
 449                                 const char *__restrict __format, ...),
 450                        __isoc99_fscanf) __wur;
 451 extern int __REDIRECT (scanf, (const char *__restrict __format, ...),
 452                        __isoc99_scanf) __wur;
 453 extern int __REDIRECT_NTH (sscanf, (const char *__restrict __s,
 454                                     const char *__restrict __format, ...),
 455                            __isoc99_sscanf);
 456 # else
 457 extern int __isoc99_fscanf (FILE *__restrict __stream,
 458                             const char *__restrict __format, ...) __wur;
 459 extern int __isoc99_scanf (const char *__restrict __format, ...) __wur;
 460 extern int __isoc99_sscanf (const char *__restrict __s,
 461                             const char *__restrict __format, ...) __THROW;
 462 #  define fscanf __isoc99_fscanf
 463 #  define scanf __isoc99_scanf
 464 #  define sscanf __isoc99_sscanf
 465 # endif
 466 #endif
 467
 468 __END_NAMESPACE_STD
 469
 470 #ifdef  __USE_ISOC99
 471 __BEGIN_NAMESPACE_C99
 472 /* Read formatted input from S into argument list ARG.
 473
 474    This function is a possible cancellation point and therefore not
 475    marked with __THROW.  */
 476 extern int vfscanf (FILE *__restrict __s, const char *__restrict __format,
 477                     _G_va_list __arg)
 478      __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
 479
 480 /* Read formatted input from stdin into argument list ARG.
 481
 482    This function is a possible cancellation point and therefore not
 483    marked with __THROW.  */
 484 extern int vscanf (const char *__restrict __format, _G_va_list __arg)
 485      __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
 486
 487 /* Read formatted input from S into argument list ARG.  */
 488 extern int vsscanf (const char *__restrict __s,
 489                     const char *__restrict __format, _G_va_list __arg)
 490      __THROW __attribute__ ((__format__ (__scanf__, 2, 0)));
 491
 492 # if !defined __USE_GNU \
 493      && (!defined __LDBL_COMPAT || !defined __REDIRECT) \
 494      && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K)
 495 #  ifdef __REDIRECT
 496 /* For strict ISO C99 or POSIX compliance disallow %as, %aS and %a[
 497    GNU extension which conflicts with valid %a followed by letter
 498    s, S or [.  */
 499 extern int __REDIRECT (vfscanf,
 500                        (FILE *__restrict __s,
 501                         const char *__restrict __format, _G_va_list __arg),
 502                        __isoc99_vfscanf)
 503      __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
 504 extern int __REDIRECT (vscanf, (const char *__restrict __format,
 505                                 _G_va_list __arg), __isoc99_vscanf)
 506      __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
 507 extern int __REDIRECT_NTH (vsscanf,
 508                            (const char *__restrict __s,
 509                             const char *__restrict __format,
 510                             _G_va_list __arg), __isoc99_vsscanf)
 511      __attribute__ ((__format__ (__scanf__, 2, 0)));
 512 #  else
 513 extern int __isoc99_vfscanf (FILE *__restrict __s,
 514                              const char *__restrict __format,
 515                              _G_va_list __arg) __wur;
 516 extern int __isoc99_vscanf (const char *__restrict __format,
 517                             _G_va_list __arg) __wur;
 518 extern int __isoc99_vsscanf (const char *__restrict __s,
 519                              const char *__restrict __format,
 520                              _G_va_list __arg) __THROW;
 521 #   define vfscanf __isoc99_vfscanf
 522 #   define vscanf __isoc99_vscanf
 523 #   define vsscanf __isoc99_vsscanf
 524 #  endif
 525 # endif
 526
 527 __END_NAMESPACE_C99
 528 #endif /* Use ISO C9x.  */
 529
 530
 531 __BEGIN_NAMESPACE_STD
 532 /* Read a character from STREAM.
 533
 534    These functions are possible cancellation points and therefore not
 535    marked with __THROW.  */
 536 extern int fgetc (FILE *__stream);
 537 extern int getc (FILE *__stream);
 538
 539 /* Read a character from stdin.
 540
 541    This function is a possible cancellation point and therefore not
 542    marked with __THROW.  */
 543 extern int getchar (void);
 544 __END_NAMESPACE_STD
 545
 546 /* The C standard explicitly says this is a macro, so we always do the
 547    optimization for it.  */
 548 #define getc(_fp) _IO_getc (_fp)
 549
 550 #if defined __USE_POSIX || defined __USE_MISC
 551 /* These are defined in POSIX.1:1996.
 552
 553    These functions are possible cancellation points and therefore not
 554    marked with __THROW.  */
 555 extern int getc_unlocked (FILE *__stream);
 556 extern int getchar_unlocked (void);
 557 #endif /* Use POSIX or MISC.  */
 558
 559 #ifdef __USE_MISC
 560 /* Faster version when locking is not necessary.
 561
 562    This function is not part of POSIX and therefore no official
 563    cancellation point.  But due to similarity with an POSIX interface
 564    or due to the implementation it is a cancellation point and
 565    therefore not marked with __THROW.  */
 566 extern int fgetc_unlocked (FILE *__stream);
 567 #endif /* Use MISC.  */
 568
 569
 570 __BEGIN_NAMESPACE_STD
 571 /* Write a character to STREAM.
 572
 573    These functions are possible cancellation points and therefore not
 574    marked with __THROW.
 575
 576    These functions is a possible cancellation point and therefore not
 577    marked with __THROW.  */
 578 extern int fputc (int __c, FILE *__stream);
 579 extern int putc (int __c, FILE *__stream);
 580
 581 /* Write a character to stdout.
 582
 583    This function is a possible cancellation point and therefore not
 584    marked with __THROW.  */
 585 extern int putchar (int __c);
 586 __END_NAMESPACE_STD
 587
 588 /* The C standard explicitly says this can be a macro,
 589    so we always do the optimization for it.  */
 590 #define putc(_ch, _fp) _IO_putc (_ch, _fp)
 591
 592 #ifdef __USE_MISC
 593 /* Faster version when locking is not necessary.
 594
 595    This function is not part of POSIX and therefore no official
 596    cancellation point.  But due to similarity with an POSIX interface
 597    or due to the implementation it is a cancellation point and
 598    therefore not marked with __THROW.  */
 599 extern int fputc_unlocked (int __c, FILE *__stream);
 600 #endif /* Use MISC.  */
 601
 602 #if defined __USE_POSIX || defined __USE_MISC
 603 /* These are defined in POSIX.1:1996.
 604
 605    These functions are possible cancellation points and therefore not
 606    marked with __THROW.  */
 607 extern int putc_unlocked (int __c, FILE *__stream);
 608 extern int putchar_unlocked (int __c);
 609 #endif /* Use POSIX or MISC.  */
 610
 611
 612 #if defined __USE_SVID || defined __USE_MISC \
 613     || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
 614 /* Get a word (int) from STREAM.  */
 615 extern int getw (FILE *__stream);
 616
 617 /* Write a word (int) to STREAM.  */
 618 extern int putw (int __w, FILE *__stream);
 619 #endif
 620
 621
 622 __BEGIN_NAMESPACE_STD
 623 /* Get a newline-terminated string of finite length from STREAM.
 624
 625    This function is a possible cancellation point and therefore not
 626    marked with __THROW.  */
 627 extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
 628      __wur;
 629
 630 #if !defined __USE_ISOC11 \
 631     || (defined __cplusplus && __cplusplus <= 201103L && !defined __USE_GNU)
 632 /* Get a newline-terminated string from stdin, removing the newline.
 633    DO NOT USE THIS FUNCTION!!  There is no limit on how much it will read.
 634
 635    The function has been officially removed in ISO C11.  This opportunity
 636    is used to also remove it from the GNU feature list.  It is now only
 637    available when explicitly using an old ISO C, Unix, or POSIX standard.
 638    GCC defines _GNU_SOURCE when building C++ code and the function is still
 639    in C++11, so it is also available for C++.
 640
 641    This function is a possible cancellation point and therefore not
 642    marked with __THROW.  */
 643 extern char *gets (char *__s) __wur __attribute_deprecated__;
 644 #endif
 645 __END_NAMESPACE_STD
 646
 647 #ifdef __USE_GNU
 648 /* This function does the same as `fgets' but does not lock the stream.
 649
 650    This function is not part of POSIX and therefore no official
 651    cancellation point.  But due to similarity with an POSIX interface
 652    or due to the implementation it is a cancellation point and
 653    therefore not marked with __THROW.  */
 654 extern char *fgets_unlocked (char *__restrict __s, int __n,
 655                              FILE *__restrict __stream) __wur;
 656 #endif
 657
 658
 659 #ifdef  __USE_XOPEN2K8
 660 /* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
 661    (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
 662    NULL), pointing to *N characters of space.  It is realloc'd as
 663    necessary.  Returns the number of characters read (not including the
 664    null terminator), or -1 on error or EOF.
 665
 666    These functions are not part of POSIX and therefore no official
 667    cancellation point.  But due to similarity with an POSIX interface
 668    or due to the implementation they are cancellation points and
 669    therefore not marked with __THROW.  */
 670 extern _IO_ssize_t __getdelim (char **__restrict __lineptr,
 671                                size_t *__restrict __n, int __delimiter,
 672                                FILE *__restrict __stream) __wur;
 673 extern _IO_ssize_t getdelim (char **__restrict __lineptr,
 674                              size_t *__restrict __n, int __delimiter,
 675                              FILE *__restrict __stream) __wur;
 676
 677 /* Like `getdelim', but reads up to a newline.
 678
 679    This function is not part of POSIX and therefore no official
 680    cancellation point.  But due to similarity with an POSIX interface
 681    or due to the implementation it is a cancellation point and
 682    therefore not marked with __THROW.  */
 683 extern _IO_ssize_t getline (char **__restrict __lineptr,
 684                             size_t *__restrict __n,
 685                             FILE *__restrict __stream) __wur;
 686 #endif
 687
 688
 689 __BEGIN_NAMESPACE_STD
 690 /* Write a string to STREAM.
 691
 692    This function is a possible cancellation point and therefore not
 693    marked with __THROW.  */
 694 extern int fputs (const char *__restrict __s, FILE *__restrict __stream);
 695
 696 /* Write a string, followed by a newline, to stdout.
 697
 698    This function is a possible cancellation point and therefore not
 699    marked with __THROW.  */
 700 extern int puts (const char *__s);
 701
 702
 703 /* Push a character back onto the input buffer of STREAM.
 704
 705    This function is a possible cancellation point and therefore not
 706    marked with __THROW.  */
 707 extern int ungetc (int __c, FILE *__stream);
 708
 709
 710 /* Read chunks of generic data from STREAM.
 711
 712    This function is a possible cancellation point and therefore not
 713    marked with __THROW.  */
 714 extern size_t fread (void *__restrict __ptr, size_t __size,
 715                      size_t __n, FILE *__restrict __stream) __wur;
 716 /* Write chunks of generic data to STREAM.
 717
 718    This function is a possible cancellation point and therefore not
 719    marked with __THROW.  */
 720 extern size_t fwrite (const void *__restrict __ptr, size_t __size,
 721                       size_t __n, FILE *__restrict __s) __wur;
 722 __END_NAMESPACE_STD
 723
 724 #ifdef __USE_GNU
 725 /* This function does the same as `fputs' but does not lock the stream.
 726
 727    This function is not part of POSIX and therefore no official
 728    cancellation point.  But due to similarity with an POSIX interface
 729    or due to the implementation it is a cancellation point and
 730    therefore not marked with __THROW.  */
 731 extern int fputs_unlocked (const char *__restrict __s,
 732                            FILE *__restrict __stream);
 733 #endif
 734
 735 #ifdef __USE_MISC
 736 /* Faster versions when locking is not necessary.
 737
 738    These functions are not part of POSIX and therefore no official
 739    cancellation point.  But due to similarity with an POSIX interface
 740    or due to the implementation they are cancellation points and
 741    therefore not marked with __THROW.  */
 742 extern size_t fread_unlocked (void *__restrict __ptr, size_t __size,
 743                               size_t __n, FILE *__restrict __stream) __wur;
 744 extern size_t fwrite_unlocked (const void *__restrict __ptr, size_t __size,
 745                                size_t __n, FILE *__restrict __stream) __wur;
 746 #endif
 747
 748
 749 __BEGIN_NAMESPACE_STD
 750 /* Seek to a certain position on STREAM.
 751
 752    This function is a possible cancellation point and therefore not
 753    marked with __THROW.  */
 754 extern int fseek (FILE *__stream, long int __off, int __whence);
 755 /* Return the current position of STREAM.
 756
 757    This function is a possible cancellation point and therefore not
 758    marked with __THROW.  */
 759 extern long int ftell (FILE *__stream) __wur;
 760 /* Rewind to the beginning of STREAM.
 761
 762    This function is a possible cancellation point and therefore not
 763    marked with __THROW.  */
 764 extern void rewind (FILE *__stream);
 765 __END_NAMESPACE_STD
 766
 767 /* The Single Unix Specification, Version 2, specifies an alternative,
 768    more adequate interface for the two functions above which deal with
 769    file offset.  `long int' is not the right type.  These definitions
 770    are originally defined in the Large File Support API.  */
 771
 772 #if defined __USE_LARGEFILE || defined __USE_XOPEN2K
 773 # ifndef __USE_FILE_OFFSET64
 774 /* Seek to a certain position on STREAM.
 775
 776    This function is a possible cancellation point and therefore not
 777    marked with __THROW.  */
 778 extern int fseeko (FILE *__stream, __off_t __off, int __whence);
 779 /* Return the current position of STREAM.
 780
 781    This function is a possible cancellation point and therefore not
 782    marked with __THROW.  */
 783 extern __off_t ftello (FILE *__stream) __wur;
 784 # else
 785 #  ifdef __REDIRECT
 786 extern int __REDIRECT (fseeko,
 787                        (FILE *__stream, __off64_t __off, int __whence),
 788                        fseeko64);
 789 extern __off64_t __REDIRECT (ftello, (FILE *__stream), ftello64);
 790 #  else
 791 #   define fseeko fseeko64
 792 #   define ftello ftello64
 793 #  endif
 794 # endif
 795 #endif
 796
 797 __BEGIN_NAMESPACE_STD
 798 #ifndef __USE_FILE_OFFSET64
 799 /* Get STREAM's position.
 800
 801    This function is a possible cancellation point and therefore not
 802    marked with __THROW.  */
 803 extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos);
 804 /* Set STREAM's position.
 805
 806    This function is a possible cancellation point and therefore not
 807    marked with __THROW.  */
 808 extern int fsetpos (FILE *__stream, const fpos_t *__pos);
 809 #else
 810 # ifdef __REDIRECT
 811 extern int __REDIRECT (fgetpos, (FILE *__restrict __stream,
 812                                  fpos_t *__restrict __pos), fgetpos64);
 813 extern int __REDIRECT (fsetpos,
 814                        (FILE *__stream, const fpos_t *__pos), fsetpos64);
 815 # else
 816 #  define fgetpos fgetpos64
 817 #  define fsetpos fsetpos64
 818 # endif
 819 #endif
 820 __END_NAMESPACE_STD
 821
 822 #ifdef __USE_LARGEFILE64
 823 extern int fseeko64 (FILE *__stream, __off64_t __off, int __whence);
 824 extern __off64_t ftello64 (FILE *__stream) __wur;
 825 extern int fgetpos64 (FILE *__restrict __stream, fpos64_t *__restrict __pos);
 826 extern int fsetpos64 (FILE *__stream, const fpos64_t *__pos);
 827 #endif
 828
 829 __BEGIN_NAMESPACE_STD
 830 /* Clear the error and EOF indicators for STREAM.  */
 831 extern void clearerr (FILE *__stream) __THROW;
 832 /* Return the EOF indicator for STREAM.  */
 833 extern int feof (FILE *__stream) __THROW __wur;
 834 /* Return the error indicator for STREAM.  */
 835 extern int ferror (FILE *__stream) __THROW __wur;
 836 __END_NAMESPACE_STD
 837
 838 #ifdef __USE_MISC
 839 /* Faster versions when locking is not required.  */
 840 extern void clearerr_unlocked (FILE *__stream) __THROW;
 841 extern int feof_unlocked (FILE *__stream) __THROW __wur;
 842 extern int ferror_unlocked (FILE *__stream) __THROW __wur;
 843 #endif
 844
 845
 846 __BEGIN_NAMESPACE_STD
 847 /* Print a message describing the meaning of the value of errno.
 848
 849    This function is a possible cancellation point and therefore not
 850    marked with __THROW.  */
 851 extern void perror (const char *__s);
 852 __END_NAMESPACE_STD
 853
 854 /* Provide the declarations for `sys_errlist' and `sys_nerr' if they
 855    are available on this system.  Even if available, these variables
 856    should not be used directly.  The `strerror' function provides
 857    all the necessary functionality.  */
 858 #include <bits/sys_errlist.h>
 859
 860
 861 #ifdef  __USE_POSIX
 862 /* Return the system file descriptor for STREAM.  */
 863 extern int fileno (FILE *__stream) __THROW __wur;
 864 #endif /* Use POSIX.  */
 865
 866 #ifdef __USE_MISC
 867 /* Faster version when locking is not required.  */
 868 extern int fileno_unlocked (FILE *__stream) __THROW __wur;
 869 #endif
 870
 871
 872 #if (defined __USE_POSIX2 || defined __USE_SVID  || defined __USE_BSD || \
 873      defined __USE_MISC)
 874 /* Create a new stream connected to a pipe running the given command.
 875
 876    This function is a possible cancellation point and therefore not
 877    marked with __THROW.  */
 878 extern FILE *popen (const char *__command, const char *__modes) __wur;
 879
 880 /* Close a stream opened by popen and return the status of its child.
 881
 882    This function is a possible cancellation point and therefore not
 883    marked with __THROW.  */
 884 extern int pclose (FILE *__stream);
 885 #endif
 886
 887
 888 #ifdef  __USE_POSIX
 889 /* Return the name of the controlling terminal.  */
 890 extern char *ctermid (char *__s) __THROW;
 891 #endif /* Use POSIX.  */
 892
 893
 894 #ifdef __USE_XOPEN
 895 /* Return the name of the current user.  */
 896 extern char *cuserid (char *__s);
 897 #endif /* Use X/Open, but not issue 6.  */
 898
 899
 900 #ifdef  __USE_GNU
 901 struct obstack;                 /* See <obstack.h>.  */
 902
 903 /* Write formatted output to an obstack.  */
 904 extern int obstack_printf (struct obstack *__restrict __obstack,
 905                            const char *__restrict __format, ...)
 906      __THROWNL __attribute__ ((__format__ (__printf__, 2, 3)));
 907 extern int obstack_vprintf (struct obstack *__restrict __obstack,
 908                             const char *__restrict __format,
 909                             _G_va_list __args)
 910      __THROWNL __attribute__ ((__format__ (__printf__, 2, 0)));
 911 #endif /* Use GNU.  */
 912
 913
 914 #if defined __USE_POSIX || defined __USE_MISC
 915 /* These are defined in POSIX.1:1996.  */
 916
 917 /* Acquire ownership of STREAM.  */
 918 extern void flockfile (FILE *__stream) __THROW;
 919
 920 /* Try to acquire ownership of STREAM but do not block if it is not
 921    possible.  */
 922 extern int ftrylockfile (FILE *__stream) __THROW __wur;
 923
 924 /* Relinquish the ownership granted for STREAM.  */
 925 extern void funlockfile (FILE *__stream) __THROW;
 926 #endif /* POSIX || misc */
 927
 928 #if defined __USE_XOPEN && !defined __USE_XOPEN2K && !defined __USE_GNU
 929 /* The X/Open standard requires some functions and variables to be
 930    declared here which do not belong into this header.  But we have to
 931    follow.  In GNU mode we don't do this nonsense.  */
 932 # define __need_getopt
 933 # include <getopt.h>
 934 #endif  /* X/Open, but not issue 6 and not for GNU.  */
 935
 936 /* If we are compiling with optimizing read this file.  It contains
 937    several optimizing inline functions and macros.  */
 938 #ifdef __USE_EXTERN_INLINES
 939 # include <bits/stdio.h>
 940 #endif
 941 #if __USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline
 942 # include <bits/stdio2.h>
 943 #endif
 944 #ifdef __LDBL_COMPAT
 945 # include <bits/stdio-ldbl.h>
 946 #endif
 947
 948 __END_DECLS
 949
 950 #endif /* <stdio.h> included.  */
 951
 952 #endif /* !_STDIO_H */