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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 /*
  21  *      ISO C99 Standard: 7.19 Input/output     <stdio.h>
  22  */
  23
  24 #ifndef _STDIO_H
  25
  26 #if !defined __need_FILE && !defined __need___FILE
  27 # define _STDIO_H       1
  28 # include <features.h>
  29
  30 __BEGIN_DECLS
  31
  32 # define __need_size_t
  33 # define __need_NULL
  34 # include <stddef.h>
  35
  36 # include <bits/types.h>
  37 # define __need_FILE
  38 # define __need___FILE
  39 #endif /* Don't need FILE.  */
  40
  41
  42 #if !defined __FILE_defined && defined __need_FILE
  43
  44 /* Define outside of namespace so the C++ is happy.  */
  45 struct _IO_FILE;
  46
  47 __BEGIN_NAMESPACE_STD
  48 /* The opaque type of streams.  This is the definition used elsewhere.  */
  49 typedef struct _IO_FILE FILE;
  50 __END_NAMESPACE_STD
  51 #if defined __USE_LARGEFILE64 || defined __USE_SVID || defined __USE_POSIX \
  52     || defined __USE_BSD || defined __USE_ISOC99 || defined __USE_XOPEN \
  53     || defined __USE_POSIX2
  54 __USING_NAMESPACE_STD(FILE)
  55 #endif
  56
  57 # define __FILE_defined 1
  58 #endif /* FILE not defined.  */
  59 #undef  __need_FILE
  60
  61
  62 #if !defined ____FILE_defined && defined __need___FILE
  63
  64 /* The opaque type of streams.  This is the definition used elsewhere.  */
  65 typedef struct _IO_FILE __FILE;
  66
  67 # define ____FILE_defined       1
  68 #endif /* __FILE not defined.  */
  69 #undef  __need___FILE
  70
  71
  72 #ifdef  _STDIO_H
  73 #define _STDIO_USES_IOSTREAM
  74
  75 #include <libio.h>
  76
  77 #if defined __USE_XOPEN || defined __USE_XOPEN2K8
  78 # ifdef __GNUC__
  79 #  ifndef _VA_LIST_DEFINED
  80 typedef _G_va_list va_list;
  81 #   define _VA_LIST_DEFINED
  82 #  endif
  83 # else
  84 #  include <stdarg.h>
  85 # endif
  86 #endif
  87
  88 #ifdef __USE_XOPEN2K8
  89 # ifndef __off_t_defined
  90 # ifndef __USE_FILE_OFFSET64
  91 typedef __off_t off_t;
  92 # else
  93 typedef __off64_t off_t;
  94 # endif
  95 # define __off_t_defined
  96 # endif
  97 # if defined __USE_LARGEFILE64 && !defined __off64_t_defined
  98 typedef __off64_t off64_t;
  99 # define __off64_t_defined
 100 # endif
 101
 102 # ifndef __ssize_t_defined
 103 typedef __ssize_t ssize_t;
 104 # define __ssize_t_defined
 105 # endif
 106 #endif
 107
 108 /* The type of the second argument to `fgetpos' and `fsetpos'.  */
 109 __BEGIN_NAMESPACE_STD
 110 #ifndef __USE_FILE_OFFSET64
 111 typedef _G_fpos_t fpos_t;
 112 #else
 113 typedef _G_fpos64_t fpos_t;
 114 #endif
 115 __END_NAMESPACE_STD
 116 #ifdef __USE_LARGEFILE64
 117 typedef _G_fpos64_t fpos64_t;
 118 #endif
 119
 120 /* The possibilities for the third argument to `setvbuf'.  */
 121 #define _IOFBF 0                /* Fully buffered.  */
 122 #define _IOLBF 1                /* Line buffered.  */
 123 #define _IONBF 2                /* No buffering.  */
 124
 125
 126 /* Default buffer size.  */
 127 #ifndef BUFSIZ
 128 # define BUFSIZ _IO_BUFSIZ
 129 #endif
 130
 131
 132 /* End of file character.
 133    Some things throughout the library rely on this being -1.  */
 134 #ifndef EOF
 135 # define EOF (-1)
 136 #endif
 137
 138
 139 /* The possibilities for the third argument to `fseek'.
 140    These values should not be changed.  */
 141 #define SEEK_SET        0       /* Seek from beginning of file.  */
 142 #define SEEK_CUR        1       /* Seek from current position.  */
 143 #define SEEK_END        2       /* Seek from end of file.  */
 144 #ifdef __USE_GNU
 145 # define SEEK_DATA      3       /* Seek to next data.  */
 146 # define SEEK_HOLE      4       /* Seek to next hole.  */
 147 #endif
 148
 149
 150 #if defined __USE_SVID || defined __USE_XOPEN
 151 /* Default path prefix for `tempnam' and `tmpnam'.  */
 152 # define P_tmpdir       "/tmp"
 153 #endif
 154
 155
 156 /* Get the values:
 157    L_tmpnam     How long an array of chars must be to be passed to `tmpnam'.
 158    TMP_MAX      The minimum number of unique filenames generated by tmpnam
 159                 (and tempnam when it uses tmpnam's name space),
 160                 or tempnam (the two are separate).
 161    L_ctermid    How long an array to pass to `ctermid'.
 162    L_cuserid    How long an array to pass to `cuserid'.
 163    FOPEN_MAX    Minimum number of files that can be open at once.
 164    FILENAME_MAX Maximum length of a filename.  */
 165 #include <bits/stdio_lim.h>
 166
 167
 168 /* Standard streams.  */
 169 extern struct _IO_FILE *stdin;          /* Standard input stream.  */
 170 extern struct _IO_FILE *stdout;         /* Standard output stream.  */
 171 extern struct _IO_FILE *stderr;         /* Standard error output stream.  */
 172 /* C89/C99 say they're macros.  Make them happy.  */
 173 #define stdin stdin
 174 #define stdout stdout
 175 #define stderr stderr
 176
 177 __BEGIN_NAMESPACE_STD
 178 /* Remove file FILENAME.  */
 179 extern int remove (const char *__filename) __THROW;
 180 /* Rename file OLD to NEW.  */
 181 extern int rename (const char *__old, const char *__new) __THROW;
 182 __END_NAMESPACE_STD
 183
 184 #ifdef __USE_ATFILE
 185 /* Rename file OLD relative to OLDFD to NEW relative to NEWFD.  */
 186 extern int renameat (int __oldfd, const char *__old, int __newfd,
 187                      const char *__new) __THROW;
 188 #endif
 189
 190 __BEGIN_NAMESPACE_STD
 191 /* Create a temporary file and open it read/write.
 192
 193    This function is a possible cancellation point and therefore not
 194    marked with __THROW.  */
 195 #ifndef __USE_FILE_OFFSET64
 196 extern FILE *tmpfile (void) __wur;
 197 #else
 198 # ifdef __REDIRECT
 199 extern FILE *__REDIRECT (tmpfile, (void), tmpfile64) __wur;
 200 # else
 201 #  define tmpfile tmpfile64
 202 # endif
 203 #endif
 204
 205 #ifdef __USE_LARGEFILE64
 206 extern FILE *tmpfile64 (void) __wur;
 207 #endif
 208
 209 /* Generate a temporary filename.  */
 210 extern char *tmpnam (char *__s) __THROW __wur;
 211 __END_NAMESPACE_STD
 212
 213 #ifdef __USE_MISC
 214 /* This is the reentrant variant of `tmpnam'.  The only difference is
 215    that it does not allow S to be NULL.  */
 216 extern char *tmpnam_r (char *__s) __THROW __wur;
 217 #endif
 218
 219
 220 #if defined __USE_SVID || defined __USE_XOPEN
 221 /* Generate a unique temporary filename using up to five characters of PFX
 222    if it is not NULL.  The directory to put this file in is searched for
 223    as follows: First the environment variable "TMPDIR" is checked.
 224    If it contains the name of a writable directory, that directory is used.
 225    If not and if DIR is not NULL, that value is checked.  If that fails,
 226    P_tmpdir is tried and finally "/tmp".  The storage for the filename
 227    is allocated by `malloc'.  */
 228 extern char *tempnam (const char *__dir, const char *__pfx)
 229      __THROW __attribute_malloc__ __wur;
 230 #endif
 231
 232
 233 __BEGIN_NAMESPACE_STD
 234 /* Close STREAM.
 235
 236    This function is a possible cancellation point and therefore not
 237    marked with __THROW.  */
 238 extern int fclose (FILE *__stream);
 239 /* Flush STREAM, or all streams if STREAM is NULL.
 240
 241    This function is a possible cancellation point and therefore not
 242    marked with __THROW.  */
 243 extern int fflush (FILE *__stream);
 244 __END_NAMESPACE_STD
 245
 246 #ifdef __USE_MISC
 247 /* Faster versions when locking is not required.
 248
 249    This function is not part of POSIX and therefore no official
 250    cancellation point.  But due to similarity with an POSIX interface
 251    or due to the implementation it is a cancellation point and
 252    therefore not marked with __THROW.  */
 253 extern int fflush_unlocked (FILE *__stream);
 254 #endif
 255
 256 #ifdef __USE_GNU
 257 /* Close all streams.
 258
 259    This function is not part of POSIX and therefore no official
 260    cancellation point.  But due to similarity with an POSIX interface
 261    or due to the implementation it is a cancellation point and
 262    therefore not marked with __THROW.  */
 263 extern int fcloseall (void);
 264 #endif
 265
 266
 267 __BEGIN_NAMESPACE_STD
 268 #ifndef __USE_FILE_OFFSET64
 269 /* Open a file and create a new stream for it.
 270
 271    This function is a possible cancellation point and therefore not
 272    marked with __THROW.  */
 273 extern FILE *fopen (const char *__restrict __filename,
 274                     const char *__restrict __modes) __wur;
 275 /* Open a file, replacing an existing stream with it.
 276
 277    This function is a possible cancellation point and therefore not
 278    marked with __THROW.  */
 279 extern FILE *freopen (const char *__restrict __filename,
 280                       const char *__restrict __modes,
 281                       FILE *__restrict __stream) __wur;
 282 #else
 283 # ifdef __REDIRECT
 284 extern FILE *__REDIRECT (fopen, (const char *__restrict __filename,
 285                                  const char *__restrict __modes), fopen64)
 286   __wur;
 287 extern FILE *__REDIRECT (freopen, (const char *__restrict __filename,
 288                                    const char *__restrict __modes,
 289                                    FILE *__restrict __stream), freopen64)
 290   __wur;
 291 # else
 292 #  define fopen fopen64
 293 #  define freopen freopen64
 294 # endif
 295 #endif
 296 __END_NAMESPACE_STD
 297 #ifdef __USE_LARGEFILE64
 298 extern FILE *fopen64 (const char *__restrict __filename,
 299                       const char *__restrict __modes) __wur;
 300 extern FILE *freopen64 (const char *__restrict __filename,
 301                         const char *__restrict __modes,
 302                         FILE *__restrict __stream) __wur;
 303 #endif
 304
 305 #ifdef  __USE_POSIX
 306 /* Create a new stream that refers to an existing system file descriptor.  */
 307 extern FILE *fdopen (int __fd, const char *__modes) __THROW __wur;
 308 #endif
 309
 310 #ifdef  __USE_GNU
 311 /* Create a new stream that refers to the given magic cookie,
 312    and uses the given functions for input and output.  */
 313 extern FILE *fopencookie (void *__restrict __magic_cookie,
 314                           const char *__restrict __modes,
 315                           _IO_cookie_io_functions_t __io_funcs) __THROW __wur;
 316 #endif
 317
 318 #ifdef __USE_XOPEN2K8
 319 /* Create a new stream that refers to a memory buffer.  */
 320 extern FILE *fmemopen (void *__s, size_t __len, const char *__modes)
 321   __THROW __wur;
 322
 323 /* Open a stream that writes into a malloc'd buffer that is expanded as
 324    necessary.  *BUFLOC and *SIZELOC are updated with the buffer's location
 325    and the number of characters written on fflush or fclose.  */
 326 extern FILE *open_memstream (char **__bufloc, size_t *__sizeloc) __THROW __wur;
 327 #endif
 328
 329
 330 __BEGIN_NAMESPACE_STD
 331 /* If BUF is NULL, make STREAM unbuffered.
 332    Else make it use buffer BUF, of size BUFSIZ.  */
 333 extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __THROW;
 334 /* Make STREAM use buffering mode MODE.
 335    If BUF is not NULL, use N bytes of it for buffering;
 336    else allocate an internal buffer N bytes long.  */
 337 extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf,
 338                     int __modes, size_t __n) __THROW;
 339 __END_NAMESPACE_STD
 340
 341 #ifdef  __USE_BSD
 342 /* If BUF is NULL, make STREAM unbuffered.
 343    Else make it use SIZE bytes of BUF for buffering.  */
 344 extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf,
 345                        size_t __size) __THROW;
 346
 347 /* Make STREAM line-buffered.  */
 348 extern void setlinebuf (FILE *__stream) __THROW;
 349 #endif
 350
 351
 352 __BEGIN_NAMESPACE_STD
 353 /* Write formatted output to STREAM.
 354
 355    This function is a possible cancellation point and therefore not
 356    marked with __THROW.  */
 357 extern int fprintf (FILE *__restrict __stream,
 358                     const char *__restrict __format, ...);
 359 /* Write formatted output to stdout.
 360
 361    This function is a possible cancellation point and therefore not
 362    marked with __THROW.  */
 363 extern int printf (const char *__restrict __format, ...);
 364 /* Write formatted output to S.  */
 365 extern int sprintf (char *__restrict __s,
 366                     const char *__restrict __format, ...) __THROWNL;
 367
 368 /* Write formatted output to S from argument list ARG.
 369
 370    This function is a possible cancellation point and therefore not
 371    marked with __THROW.  */
 372 extern int vfprintf (FILE *__restrict __s, const char *__restrict __format,
 373                      _G_va_list __arg);
 374 /* Write formatted output to stdout from argument list ARG.
 375
 376    This function is a possible cancellation point and therefore not
 377    marked with __THROW.  */
 378 extern int vprintf (const char *__restrict __format, _G_va_list __arg);
 379 /* Write formatted output to S from argument list ARG.  */
 380 extern int vsprintf (char *__restrict __s, const char *__restrict __format,
 381                      _G_va_list __arg) __THROWNL;
 382 __END_NAMESPACE_STD
 383
 384 #if defined __USE_BSD || defined __USE_ISOC99 || defined __USE_UNIX98
 385 __BEGIN_NAMESPACE_C99
 386 /* Maximum chars of output to write in MAXLEN.  */
 387 extern int snprintf (char *__restrict __s, size_t __maxlen,
 388                      const char *__restrict __format, ...)
 389      __THROWNL __attribute__ ((__format__ (__printf__, 3, 4)));
 390
 391 extern int vsnprintf (char *__restrict __s, size_t __maxlen,
 392                       const char *__restrict __format, _G_va_list __arg)
 393      __THROWNL __attribute__ ((__format__ (__printf__, 3, 0)));
 394 __END_NAMESPACE_C99
 395 #endif
 396
 397 #ifdef __USE_GNU
 398 /* Write formatted output to a string dynamically allocated with `malloc'.
 399    Store the address of the string in *PTR.  */
 400 extern int vasprintf (char **__restrict __ptr, const char *__restrict __f,
 401                       _G_va_list __arg)
 402      __THROWNL __attribute__ ((__format__ (__printf__, 2, 0))) __wur;
 403 extern int __asprintf (char **__restrict __ptr,
 404                        const char *__restrict __fmt, ...)
 405      __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur;
 406 extern int asprintf (char **__restrict __ptr,
 407                      const char *__restrict __fmt, ...)
 408      __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur;
 409 #endif
 410
 411 #ifdef __USE_XOPEN2K8
 412 /* Write formatted output to a file descriptor.
 413
 414    These functions are not part of POSIX and therefore no official
 415    cancellation point.  But due to similarity with an POSIX interface
 416    or due to the implementation they are cancellation points and
 417    therefore not marked with __THROW.  */
 418 extern int vdprintf (int __fd, const char *__restrict __fmt,
 419                      _G_va_list __arg)
 420      __attribute__ ((__format__ (__printf__, 2, 0)));
 421 extern int dprintf (int __fd, const char *__restrict __fmt, ...)
 422      __attribute__ ((__format__ (__printf__, 2, 3)));
 423 #endif
 424
 425
 426 __BEGIN_NAMESPACE_STD
 427 /* Read formatted input from STREAM.
 428
 429    This function is a possible cancellation point and therefore not
 430    marked with __THROW.  */
 431 extern int fscanf (FILE *__restrict __stream,
 432                    const char *__restrict __format, ...) __wur;
 433 /* Read formatted input from stdin.
 434
 435    This function is a possible cancellation point and therefore not
 436    marked with __THROW.  */
 437 extern int scanf (const char *__restrict __format, ...) __wur;
 438 /* Read formatted input from S.  */
 439 extern int sscanf (const char *__restrict __s,
 440                    const char *__restrict __format, ...) __THROW;
 441
 442 #if defined __USE_ISOC99 && !defined __USE_GNU \
 443     && (!defined __LDBL_COMPAT || !defined __REDIRECT) \
 444     && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K)
 445 # ifdef __REDIRECT
 446 /* For strict ISO C99 or POSIX compliance disallow %as, %aS and %a[
 447    GNU extension which conflicts with valid %a followed by letter
 448    s, S or [.  */
 449 extern int __REDIRECT (fscanf, (FILE *__restrict __stream,
 450                                 const char *__restrict __format, ...),
 451                        __isoc99_fscanf) __wur;
 452 extern int __REDIRECT (scanf, (const char *__restrict __format, ...),
 453                        __isoc99_scanf) __wur;
 454 extern int __REDIRECT_NTH (sscanf, (const char *__restrict __s,
 455                                     const char *__restrict __format, ...),
 456                            __isoc99_sscanf);
 457 # else
 458 extern int __isoc99_fscanf (FILE *__restrict __stream,
 459                             const char *__restrict __format, ...) __wur;
 460 extern int __isoc99_scanf (const char *__restrict __format, ...) __wur;
 461 extern int __isoc99_sscanf (const char *__restrict __s,
 462                             const char *__restrict __format, ...) __THROW;
 463 #  define fscanf __isoc99_fscanf
 464 #  define scanf __isoc99_scanf
 465 #  define sscanf __isoc99_sscanf
 466 # endif
 467 #endif
 468
 469 __END_NAMESPACE_STD
 470
 471 #ifdef  __USE_ISOC99
 472 __BEGIN_NAMESPACE_C99
 473 /* Read formatted input from S into argument list ARG.
 474
 475    This function is a possible cancellation point and therefore not
 476    marked with __THROW.  */
 477 extern int vfscanf (FILE *__restrict __s, const char *__restrict __format,
 478                     _G_va_list __arg)
 479      __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
 480
 481 /* Read formatted input from stdin into argument list ARG.
 482
 483    This function is a possible cancellation point and therefore not
 484    marked with __THROW.  */
 485 extern int vscanf (const char *__restrict __format, _G_va_list __arg)
 486      __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
 487
 488 /* Read formatted input from S into argument list ARG.  */
 489 extern int vsscanf (const char *__restrict __s,
 490                     const char *__restrict __format, _G_va_list __arg)
 491      __THROW __attribute__ ((__format__ (__scanf__, 2, 0)));
 492
 493 # if !defined __USE_GNU \
 494      && (!defined __LDBL_COMPAT || !defined __REDIRECT) \
 495      && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K)
 496 #  ifdef __REDIRECT
 497 /* For strict ISO C99 or POSIX compliance disallow %as, %aS and %a[
 498    GNU extension which conflicts with valid %a followed by letter
 499    s, S or [.  */
 500 extern int __REDIRECT (vfscanf,
 501                        (FILE *__restrict __s,
 502                         const char *__restrict __format, _G_va_list __arg),
 503                        __isoc99_vfscanf)
 504      __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
 505 extern int __REDIRECT (vscanf, (const char *__restrict __format,
 506                                 _G_va_list __arg), __isoc99_vscanf)
 507      __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
 508 extern int __REDIRECT_NTH (vsscanf,
 509                            (const char *__restrict __s,
 510                             const char *__restrict __format,
 511                             _G_va_list __arg), __isoc99_vsscanf)
 512      __attribute__ ((__format__ (__scanf__, 2, 0)));
 513 #  else
 514 extern int __isoc99_vfscanf (FILE *__restrict __s,
 515                              const char *__restrict __format,
 516                              _G_va_list __arg) __wur;
 517 extern int __isoc99_vscanf (const char *__restrict __format,
 518                             _G_va_list __arg) __wur;
 519 extern int __isoc99_vsscanf (const char *__restrict __s,
 520                              const char *__restrict __format,
 521                              _G_va_list __arg) __THROW;
 522 #   define vfscanf __isoc99_vfscanf
 523 #   define vscanf __isoc99_vscanf
 524 #   define vsscanf __isoc99_vsscanf
 525 #  endif
 526 # endif
 527
 528 __END_NAMESPACE_C99
 529 #endif /* Use ISO C9x.  */
 530
 531
 532 __BEGIN_NAMESPACE_STD
 533 /* Read a character from STREAM.
 534
 535    These functions are possible cancellation points and therefore not
 536    marked with __THROW.  */
 537 extern int fgetc (FILE *__stream);
 538 extern int getc (FILE *__stream);
 539
 540 /* Read a character from stdin.
 541
 542    This function is a possible cancellation point and therefore not
 543    marked with __THROW.  */
 544 extern int getchar (void);
 545 __END_NAMESPACE_STD
 546
 547 /* The C standard explicitly says this is a macro, so we always do the
 548    optimization for it.  */
 549 #define getc(_fp) _IO_getc (_fp)
 550
 551 #if defined __USE_POSIX || defined __USE_MISC
 552 /* These are defined in POSIX.1:1996.
 553
 554    These functions are possible cancellation points and therefore not
 555    marked with __THROW.  */
 556 extern int getc_unlocked (FILE *__stream);
 557 extern int getchar_unlocked (void);
 558 #endif /* Use POSIX or MISC.  */
 559
 560 #ifdef __USE_MISC
 561 /* Faster version when locking is not necessary.
 562
 563    This function is not part of POSIX and therefore no official
 564    cancellation point.  But due to similarity with an POSIX interface
 565    or due to the implementation it is a cancellation point and
 566    therefore not marked with __THROW.  */
 567 extern int fgetc_unlocked (FILE *__stream);
 568 #endif /* Use MISC.  */
 569
 570
 571 __BEGIN_NAMESPACE_STD
 572 /* Write a character to STREAM.
 573
 574    These functions are possible cancellation points and therefore not
 575    marked with __THROW.
 576
 577    These functions is a possible cancellation point and therefore not
 578    marked with __THROW.  */
 579 extern int fputc (int __c, FILE *__stream);
 580 extern int putc (int __c, FILE *__stream);
 581
 582 /* Write a character to stdout.
 583
 584    This function is a possible cancellation point and therefore not
 585    marked with __THROW.  */
 586 extern int putchar (int __c);
 587 __END_NAMESPACE_STD
 588
 589 /* The C standard explicitly says this can be a macro,
 590    so we always do the optimization for it.  */
 591 #define putc(_ch, _fp) _IO_putc (_ch, _fp)
 592
 593 #ifdef __USE_MISC
 594 /* Faster version when locking is not necessary.
 595
 596    This function is not part of POSIX and therefore no official
 597    cancellation point.  But due to similarity with an POSIX interface
 598    or due to the implementation it is a cancellation point and
 599    therefore not marked with __THROW.  */
 600 extern int fputc_unlocked (int __c, FILE *__stream);
 601 #endif /* Use MISC.  */
 602
 603 #if defined __USE_POSIX || defined __USE_MISC
 604 /* These are defined in POSIX.1:1996.
 605
 606    These functions are possible cancellation points and therefore not
 607    marked with __THROW.  */
 608 extern int putc_unlocked (int __c, FILE *__stream);
 609 extern int putchar_unlocked (int __c);
 610 #endif /* Use POSIX or MISC.  */
 611
 612
 613 #if defined __USE_SVID || defined __USE_MISC \
 614     || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
 615 /* Get a word (int) from STREAM.  */
 616 extern int getw (FILE *__stream);
 617
 618 /* Write a word (int) to STREAM.  */
 619 extern int putw (int __w, FILE *__stream);
 620 #endif
 621
 622
 623 __BEGIN_NAMESPACE_STD
 624 /* Get a newline-terminated string of finite length from STREAM.
 625
 626    This function is a possible cancellation point and therefore not
 627    marked with __THROW.  */
 628 extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
 629      __wur;
 630
 631 #if !defined __USE_ISOC11 \
 632     || (defined __cplusplus && __cplusplus <= 201103L && !defined __USE_GNU)
 633 /* Get a newline-terminated string from stdin, removing the newline.
 634    DO NOT USE THIS FUNCTION!!  There is no limit on how much it will read.
 635
 636    The function has been officially removed in ISO C11.  This opportunity
 637    is used to also remove it from the GNU feature list.  It is now only
 638    available when explicitly using an old ISO C, Unix, or POSIX standard.
 639    GCC defines _GNU_SOURCE when building C++ code and the function is still
 640    in C++11, so it is also available for C++.
 641
 642    This function is a possible cancellation point and therefore not
 643    marked with __THROW.  */
 644 extern char *gets (char *__s) __wur __attribute_deprecated__;
 645 #endif
 646 __END_NAMESPACE_STD
 647
 648 #ifdef __USE_GNU
 649 /* This function does the same as `fgets' but does not lock the stream.
 650
 651    This function is not part of POSIX and therefore no official
 652    cancellation point.  But due to similarity with an POSIX interface
 653    or due to the implementation it is a cancellation point and
 654    therefore not marked with __THROW.  */
 655 extern char *fgets_unlocked (char *__restrict __s, int __n,
 656                              FILE *__restrict __stream) __wur;
 657 #endif
 658
 659
 660 #ifdef  __USE_XOPEN2K8
 661 /* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
 662    (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
 663    NULL), pointing to *N characters of space.  It is realloc'd as
 664    necessary.  Returns the number of characters read (not including the
 665    null terminator), or -1 on error or EOF.
 666
 667    These functions are not part of POSIX and therefore no official
 668    cancellation point.  But due to similarity with an POSIX interface
 669    or due to the implementation they are cancellation points and
 670    therefore not marked with __THROW.  */
 671 extern _IO_ssize_t __getdelim (char **__restrict __lineptr,
 672                                size_t *__restrict __n, int __delimiter,
 673                                FILE *__restrict __stream) __wur;
 674 extern _IO_ssize_t getdelim (char **__restrict __lineptr,
 675                              size_t *__restrict __n, int __delimiter,
 676                              FILE *__restrict __stream) __wur;
 677
 678 /* Like `getdelim', but reads up to a newline.
 679
 680    This function is not part of POSIX and therefore no official
 681    cancellation point.  But due to similarity with an POSIX interface
 682    or due to the implementation it is a cancellation point and
 683    therefore not marked with __THROW.  */
 684 extern _IO_ssize_t getline (char **__restrict __lineptr,
 685                             size_t *__restrict __n,
 686                             FILE *__restrict __stream) __wur;
 687 #endif
 688
 689
 690 __BEGIN_NAMESPACE_STD
 691 /* Write a string to STREAM.
 692
 693    This function is a possible cancellation point and therefore not
 694    marked with __THROW.  */
 695 extern int fputs (const char *__restrict __s, FILE *__restrict __stream);
 696
 697 /* Write a string, followed by a newline, to stdout.
 698
 699    This function is a possible cancellation point and therefore not
 700    marked with __THROW.  */
 701 extern int puts (const char *__s);
 702
 703
 704 /* Push a character back onto the input buffer of STREAM.
 705
 706    This function is a possible cancellation point and therefore not
 707    marked with __THROW.  */
 708 extern int ungetc (int __c, FILE *__stream);
 709
 710
 711 /* Read chunks of generic data from STREAM.
 712
 713    This function is a possible cancellation point and therefore not
 714    marked with __THROW.  */
 715 extern size_t fread (void *__restrict __ptr, size_t __size,
 716                      size_t __n, FILE *__restrict __stream) __wur;
 717 /* Write chunks of generic data to STREAM.
 718
 719    This function is a possible cancellation point and therefore not
 720    marked with __THROW.  */
 721 extern size_t fwrite (const void *__restrict __ptr, size_t __size,
 722                       size_t __n, FILE *__restrict __s) __wur;
 723 __END_NAMESPACE_STD
 724
 725 #ifdef __USE_GNU
 726 /* This function does the same as `fputs' but does not lock the stream.
 727
 728    This function is not part of POSIX and therefore no official
 729    cancellation point.  But due to similarity with an POSIX interface
 730    or due to the implementation it is a cancellation point and
 731    therefore not marked with __THROW.  */
 732 extern int fputs_unlocked (const char *__restrict __s,
 733                            FILE *__restrict __stream);
 734 #endif
 735
 736 #ifdef __USE_MISC
 737 /* Faster versions when locking is not necessary.
 738
 739    These functions are not part of POSIX and therefore no official
 740    cancellation point.  But due to similarity with an POSIX interface
 741    or due to the implementation they are cancellation points and
 742    therefore not marked with __THROW.  */
 743 extern size_t fread_unlocked (void *__restrict __ptr, size_t __size,
 744                               size_t __n, FILE *__restrict __stream) __wur;
 745 extern size_t fwrite_unlocked (const void *__restrict __ptr, size_t __size,
 746                                size_t __n, FILE *__restrict __stream) __wur;
 747 #endif
 748
 749
 750 __BEGIN_NAMESPACE_STD
 751 /* Seek to a certain position on STREAM.
 752
 753    This function is a possible cancellation point and therefore not
 754    marked with __THROW.  */
 755 extern int fseek (FILE *__stream, long int __off, int __whence);
 756 /* Return the current position of STREAM.
 757
 758    This function is a possible cancellation point and therefore not
 759    marked with __THROW.  */
 760 extern long int ftell (FILE *__stream) __wur;
 761 /* Rewind to the beginning of STREAM.
 762
 763    This function is a possible cancellation point and therefore not
 764    marked with __THROW.  */
 765 extern void rewind (FILE *__stream);
 766 __END_NAMESPACE_STD
 767
 768 /* The Single Unix Specification, Version 2, specifies an alternative,
 769    more adequate interface for the two functions above which deal with
 770    file offset.  `long int' is not the right type.  These definitions
 771    are originally defined in the Large File Support API.  */
 772
 773 #if defined __USE_LARGEFILE || defined __USE_XOPEN2K
 774 # ifndef __USE_FILE_OFFSET64
 775 /* Seek to a certain position on STREAM.
 776
 777    This function is a possible cancellation point and therefore not
 778    marked with __THROW.  */
 779 extern int fseeko (FILE *__stream, __off_t __off, int __whence);
 780 /* Return the current position of STREAM.
 781
 782    This function is a possible cancellation point and therefore not
 783    marked with __THROW.  */
 784 extern __off_t ftello (FILE *__stream) __wur;
 785 # else
 786 #  ifdef __REDIRECT
 787 extern int __REDIRECT (fseeko,
 788                        (FILE *__stream, __off64_t __off, int __whence),
 789                        fseeko64);
 790 extern __off64_t __REDIRECT (ftello, (FILE *__stream), ftello64);
 791 #  else
 792 #   define fseeko fseeko64
 793 #   define ftello ftello64
 794 #  endif
 795 # endif
 796 #endif
 797
 798 __BEGIN_NAMESPACE_STD
 799 #ifndef __USE_FILE_OFFSET64
 800 /* Get STREAM's position.
 801
 802    This function is a possible cancellation point and therefore not
 803    marked with __THROW.  */
 804 extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos);
 805 /* Set STREAM's position.
 806
 807    This function is a possible cancellation point and therefore not
 808    marked with __THROW.  */
 809 extern int fsetpos (FILE *__stream, const fpos_t *__pos);
 810 #else
 811 # ifdef __REDIRECT
 812 extern int __REDIRECT (fgetpos, (FILE *__restrict __stream,
 813                                  fpos_t *__restrict __pos), fgetpos64);
 814 extern int __REDIRECT (fsetpos,
 815                        (FILE *__stream, const fpos_t *__pos), fsetpos64);
 816 # else
 817 #  define fgetpos fgetpos64
 818 #  define fsetpos fsetpos64
 819 # endif
 820 #endif
 821 __END_NAMESPACE_STD
 822
 823 #ifdef __USE_LARGEFILE64
 824 extern int fseeko64 (FILE *__stream, __off64_t __off, int __whence);
 825 extern __off64_t ftello64 (FILE *__stream) __wur;
 826 extern int fgetpos64 (FILE *__restrict __stream, fpos64_t *__restrict __pos);
 827 extern int fsetpos64 (FILE *__stream, const fpos64_t *__pos);
 828 #endif
 829
 830 __BEGIN_NAMESPACE_STD
 831 /* Clear the error and EOF indicators for STREAM.  */
 832 extern void clearerr (FILE *__stream) __THROW;
 833 /* Return the EOF indicator for STREAM.  */
 834 extern int feof (FILE *__stream) __THROW __wur;
 835 /* Return the error indicator for STREAM.  */
 836 extern int ferror (FILE *__stream) __THROW __wur;
 837 __END_NAMESPACE_STD
 838
 839 #ifdef __USE_MISC
 840 /* Faster versions when locking is not required.  */
 841 extern void clearerr_unlocked (FILE *__stream) __THROW;
 842 extern int feof_unlocked (FILE *__stream) __THROW __wur;
 843 extern int ferror_unlocked (FILE *__stream) __THROW __wur;
 844 #endif
 845
 846
 847 __BEGIN_NAMESPACE_STD
 848 /* Print a message describing the meaning of the value of errno.
 849
 850    This function is a possible cancellation point and therefore not
 851    marked with __THROW.  */
 852 extern void perror (const char *__s);
 853 __END_NAMESPACE_STD
 854
 855 /* Provide the declarations for `sys_errlist' and `sys_nerr' if they
 856    are available on this system.  Even if available, these variables
 857    should not be used directly.  The `strerror' function provides
 858    all the necessary functionality.  */
 859 #include <bits/sys_errlist.h>
 860
 861
 862 #ifdef  __USE_POSIX
 863 /* Return the system file descriptor for STREAM.  */
 864 extern int fileno (FILE *__stream) __THROW __wur;
 865 #endif /* Use POSIX.  */
 866
 867 #ifdef __USE_MISC
 868 /* Faster version when locking is not required.  */
 869 extern int fileno_unlocked (FILE *__stream) __THROW __wur;
 870 #endif
 871
 872
 873 #if (defined __USE_POSIX2 || defined __USE_SVID  || defined __USE_BSD || \
 874      defined __USE_MISC)
 875 /* Create a new stream connected to a pipe running the given command.
 876
 877    This function is a possible cancellation point and therefore not
 878    marked with __THROW.  */
 879 extern FILE *popen (const char *__command, const char *__modes) __wur;
 880
 881 /* Close a stream opened by popen and return the status of its child.
 882
 883    This function is a possible cancellation point and therefore not
 884    marked with __THROW.  */
 885 extern int pclose (FILE *__stream);
 886 #endif
 887
 888
 889 #ifdef  __USE_POSIX
 890 /* Return the name of the controlling terminal.  */
 891 extern char *ctermid (char *__s) __THROW;
 892 #endif /* Use POSIX.  */
 893
 894
 895 #ifdef __USE_XOPEN
 896 /* Return the name of the current user.  */
 897 extern char *cuserid (char *__s);
 898 #endif /* Use X/Open, but not issue 6.  */
 899
 900
 901 #ifdef  __USE_GNU
 902 struct obstack;                 /* See <obstack.h>.  */
 903
 904 /* Write formatted output to an obstack.  */
 905 extern int obstack_printf (struct obstack *__restrict __obstack,
 906                            const char *__restrict __format, ...)
 907      __THROWNL __attribute__ ((__format__ (__printf__, 2, 3)));
 908 extern int obstack_vprintf (struct obstack *__restrict __obstack,
 909                             const char *__restrict __format,
 910                             _G_va_list __args)
 911      __THROWNL __attribute__ ((__format__ (__printf__, 2, 0)));
 912 #endif /* Use GNU.  */
 913
 914
 915 #if defined __USE_POSIX || defined __USE_MISC
 916 /* These are defined in POSIX.1:1996.  */
 917
 918 /* Acquire ownership of STREAM.  */
 919 extern void flockfile (FILE *__stream) __THROW;
 920
 921 /* Try to acquire ownership of STREAM but do not block if it is not
 922    possible.  */
 923 extern int ftrylockfile (FILE *__stream) __THROW __wur;
 924
 925 /* Relinquish the ownership granted for STREAM.  */
 926 extern void funlockfile (FILE *__stream) __THROW;
 927 #endif /* POSIX || misc */
 928
 929 #if defined __USE_XOPEN && !defined __USE_XOPEN2K && !defined __USE_GNU
 930 /* The X/Open standard requires some functions and variables to be
 931    declared here which do not belong into this header.  But we have to
 932    follow.  In GNU mode we don't do this nonsense.  */
 933 # define __need_getopt
 934 # include <getopt.h>
 935 #endif  /* X/Open, but not issue 6 and not for GNU.  */
 936
 937 /* If we are compiling with optimizing read this file.  It contains
 938    several optimizing inline functions and macros.  */
 939 #ifdef __USE_EXTERN_INLINES
 940 # include <bits/stdio.h>
 941 #endif
 942 #if __USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline
 943 # include <bits/stdio2.h>
 944 #endif
 945 #ifdef __LDBL_COMPAT
 946 # include <bits/stdio-ldbl.h>
 947 #endif
 948
 949 __END_DECLS
 950
 951 #endif /* <stdio.h> included.  */
 952
 953 #endif /* !_STDIO_H */