libio/stdio.h

   1 /* Define ISO C stdio on top of C++ iostreams.
   2    Copyright (C) 1991, 1994-2007, 2008 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 /*
  21  *      ISO C99 Standard: 7.19 Input/output     <stdio.h>
  22  */
  23
  24 #ifndef _STDIO_H
  25
  26 #if !defined __need_FILE && !defined __need___FILE
  27 # define _STDIO_H       1
  28 # include <features.h>
  29
  30 __BEGIN_DECLS
  31
  32 # define __need_size_t
  33 # define __need_NULL
  34 # include <stddef.h>
  35
  36 # include <bits/types.h>
  37 # define __need_FILE
  38 # define __need___FILE
  39 #endif /* Don't need FILE.  */
  40
  41
  42 #if !defined __FILE_defined && defined __need_FILE
  43
  44 /* Define outside of namespace so the C++ is happy.  */
  45 struct _IO_FILE;
  46
  47 __BEGIN_NAMESPACE_STD
  48 /* The opaque type of streams.  This is the definition used elsewhere.  */
  49 typedef struct _IO_FILE FILE;
  50 __END_NAMESPACE_STD
  51 #if defined __USE_LARGEFILE64 || defined __USE_SVID || defined __USE_POSIX \
  52     || defined __USE_BSD || defined __USE_ISOC99 || defined __USE_XOPEN \
  53     || defined __USE_POSIX2
  54 __USING_NAMESPACE_STD(FILE)
  55 #endif
  56
  57 # define __FILE_defined 1
  58 #endif /* FILE not defined.  */
  59 #undef  __need_FILE
  60
  61
  62 #if !defined ____FILE_defined && defined __need___FILE
  63
  64 /* The opaque type of streams.  This is the definition used elsewhere.  */
  65 typedef struct _IO_FILE __FILE;
  66
  67 # define ____FILE_defined       1
  68 #endif /* __FILE not defined.  */
  69 #undef  __need___FILE
  70
  71
  72 #ifdef  _STDIO_H
  73 #define _STDIO_USES_IOSTREAM
  74
  75 #include <libio.h>
  76
  77 #ifdef __USE_XOPEN
  78 # ifdef __GNUC__
  79 #  ifndef _VA_LIST_DEFINED
  80 typedef _G_va_list va_list;
  81 #   define _VA_LIST_DEFINED
  82 #  endif
  83 # else
  84 #  include <stdarg.h>
  85 # endif
  86 #endif
  87
  88 /* The type of the second argument to `fgetpos' and `fsetpos'.  */
  89 __BEGIN_NAMESPACE_STD
  90 #ifndef __USE_FILE_OFFSET64
  91 typedef _G_fpos_t fpos_t;
  92 #else
  93 typedef _G_fpos64_t fpos_t;
  94 #endif
  95 __END_NAMESPACE_STD
  96 #ifdef __USE_LARGEFILE64
  97 typedef _G_fpos64_t fpos64_t;
  98 #endif
  99
 100 /* The possibilities for the third argument to `setvbuf'.  */
 101 #define _IOFBF 0                /* Fully buffered.  */
 102 #define _IOLBF 1                /* Line buffered.  */
 103 #define _IONBF 2                /* No buffering.  */
 104
 105
 106 /* Default buffer size.  */
 107 #ifndef BUFSIZ
 108 # define BUFSIZ _IO_BUFSIZ
 109 #endif
 110
 111
 112 /* End of file character.
 113    Some things throughout the library rely on this being -1.  */
 114 #ifndef EOF
 115 # define EOF (-1)
 116 #endif
 117
 118
 119 /* The possibilities for the third argument to `fseek'.
 120    These values should not be changed.  */
 121 #define SEEK_SET        0       /* Seek from beginning of file.  */
 122 #define SEEK_CUR        1       /* Seek from current position.  */
 123 #define SEEK_END        2       /* Seek from end of file.  */
 124
 125
 126 #if defined __USE_SVID || defined __USE_XOPEN
 127 /* Default path prefix for `tempnam' and `tmpnam'.  */
 128 # define P_tmpdir       "/tmp"
 129 #endif
 130
 131
 132 /* Get the values:
 133    L_tmpnam     How long an array of chars must be to be passed to `tmpnam'.
 134    TMP_MAX      The minimum number of unique filenames generated by tmpnam
 135                 (and tempnam when it uses tmpnam's name space),
 136                 or tempnam (the two are separate).
 137    L_ctermid    How long an array to pass to `ctermid'.
 138    L_cuserid    How long an array to pass to `cuserid'.
 139    FOPEN_MAX    Minimum number of files that can be open at once.
 140    FILENAME_MAX Maximum length of a filename.  */
 141 #include <bits/stdio_lim.h>
 142
 143
 144 /* Standard streams.  */
 145 extern struct _IO_FILE *stdin;          /* Standard input stream.  */
 146 extern struct _IO_FILE *stdout;         /* Standard output stream.  */
 147 extern struct _IO_FILE *stderr;         /* Standard error output stream.  */
 148 /* C89/C99 say they're macros.  Make them happy.  */
 149 #define stdin stdin
 150 #define stdout stdout
 151 #define stderr stderr
 152
 153 __BEGIN_NAMESPACE_STD
 154 /* Remove file FILENAME.  */
 155 extern int remove (__const char *__filename) __THROW;
 156 /* Rename file OLD to NEW.  */
 157 extern int rename (__const char *__old, __const char *__new) __THROW;
 158 __END_NAMESPACE_STD
 159
 160 #ifdef __USE_ATFILE
 161 /* Rename file OLD relative to OLDFD to NEW relative to NEWFD.  */
 162 extern int renameat (int __oldfd, __const char *__old, int __newfd,
 163                      __const char *__new) __THROW;
 164 #endif
 165
 166 __BEGIN_NAMESPACE_STD
 167 /* Create a temporary file and open it read/write.
 168
 169    This function is a possible cancellation points and therefore not
 170    marked with __THROW.  */
 171 #ifndef __USE_FILE_OFFSET64
 172 extern FILE *tmpfile (void) __wur;
 173 #else
 174 # ifdef __REDIRECT
 175 extern FILE *__REDIRECT (tmpfile, (void), tmpfile64) __wur;
 176 # else
 177 #  define tmpfile tmpfile64
 178 # endif
 179 #endif
 180
 181 #ifdef __USE_LARGEFILE64
 182 extern FILE *tmpfile64 (void) __wur;
 183 #endif
 184
 185 /* Generate a temporary filename.  */
 186 extern char *tmpnam (char *__s) __THROW __wur;
 187 __END_NAMESPACE_STD
 188
 189 #ifdef __USE_MISC
 190 /* This is the reentrant variant of `tmpnam'.  The only difference is
 191    that it does not allow S to be NULL.  */
 192 extern char *tmpnam_r (char *__s) __THROW __wur;
 193 #endif
 194
 195
 196 #if defined __USE_SVID || defined __USE_XOPEN
 197 /* Generate a unique temporary filename using up to five characters of PFX
 198    if it is not NULL.  The directory to put this file in is searched for
 199    as follows: First the environment variable "TMPDIR" is checked.
 200    If it contains the name of a writable directory, that directory is used.
 201    If not and if DIR is not NULL, that value is checked.  If that fails,
 202    P_tmpdir is tried and finally "/tmp".  The storage for the filename
 203    is allocated by `malloc'.  */
 204 extern char *tempnam (__const char *__dir, __const char *__pfx)
 205      __THROW __attribute_malloc__ __wur;
 206 #endif
 207
 208
 209 __BEGIN_NAMESPACE_STD
 210 /* Close STREAM.
 211
 212    This function is a possible cancellation point and therefore not
 213    marked with __THROW.  */
 214 extern int fclose (FILE *__stream);
 215 /* Flush STREAM, or all streams if STREAM is NULL.
 216
 217    This function is a possible cancellation point and therefore not
 218    marked with __THROW.  */
 219 extern int fflush (FILE *__stream);
 220 __END_NAMESPACE_STD
 221
 222 #ifdef __USE_MISC
 223 /* Faster versions when locking is not required.
 224
 225    This function is not part of POSIX and therefore no official
 226    cancellation point.  But due to similarity with an POSIX interface
 227    or due to the implementation it is a cancellation point and
 228    therefore not marked with __THROW.  */
 229 extern int fflush_unlocked (FILE *__stream);
 230 #endif
 231
 232 #ifdef __USE_GNU
 233 /* Close all streams.
 234
 235    This function is not part of POSIX and therefore no official
 236    cancellation point.  But due to similarity with an POSIX interface
 237    or due to the implementation it is a cancellation point and
 238    therefore not marked with __THROW.  */
 239 extern int fcloseall (void);
 240 #endif
 241
 242
 243 __BEGIN_NAMESPACE_STD
 244 #ifndef __USE_FILE_OFFSET64
 245 /* Open a file and create a new stream for it.
 246
 247    This function is a possible cancellation point and therefore not
 248    marked with __THROW.  */
 249 extern FILE *fopen (__const char *__restrict __filename,
 250                     __const char *__restrict __modes) __wur;
 251 /* Open a file, replacing an existing stream with it.
 252
 253    This function is a possible cancellation point and therefore not
 254    marked with __THROW.  */
 255 extern FILE *freopen (__const char *__restrict __filename,
 256                       __const char *__restrict __modes,
 257                       FILE *__restrict __stream) __wur;
 258 #else
 259 # ifdef __REDIRECT
 260 extern FILE *__REDIRECT (fopen, (__const char *__restrict __filename,
 261                                  __const char *__restrict __modes), fopen64)
 262   __wur;
 263 extern FILE *__REDIRECT (freopen, (__const char *__restrict __filename,
 264                                    __const char *__restrict __modes,
 265                                    FILE *__restrict __stream), freopen64)
 266   __wur;
 267 # else
 268 #  define fopen fopen64
 269 #  define freopen freopen64
 270 # endif
 271 #endif
 272 __END_NAMESPACE_STD
 273 #ifdef __USE_LARGEFILE64
 274 extern FILE *fopen64 (__const char *__restrict __filename,
 275                       __const char *__restrict __modes) __wur;
 276 extern FILE *freopen64 (__const char *__restrict __filename,
 277                         __const char *__restrict __modes,
 278                         FILE *__restrict __stream) __wur;
 279 #endif
 280
 281 #ifdef  __USE_POSIX
 282 /* Create a new stream that refers to an existing system file descriptor.  */
 283 extern FILE *fdopen (int __fd, __const char *__modes) __THROW __wur;
 284 #endif
 285
 286 #ifdef  __USE_GNU
 287 /* Create a new stream that refers to the given magic cookie,
 288    and uses the given functions for input and output.  */
 289 extern FILE *fopencookie (void *__restrict __magic_cookie,
 290                           __const char *__restrict __modes,
 291                           _IO_cookie_io_functions_t __io_funcs) __THROW __wur;
 292
 293 /* Create a new stream that refers to a memory buffer.  */
 294 extern FILE *fmemopen (void *__s, size_t __len, __const char *__modes)
 295   __THROW __wur;
 296
 297 /* Open a stream that writes into a malloc'd buffer that is expanded as
 298    necessary.  *BUFLOC and *SIZELOC are updated with the buffer's location
 299    and the number of characters written on fflush or fclose.  */
 300 extern FILE *open_memstream (char **__bufloc, size_t *__sizeloc) __THROW __wur;
 301 #endif
 302
 303
 304 __BEGIN_NAMESPACE_STD
 305 /* If BUF is NULL, make STREAM unbuffered.
 306    Else make it use buffer BUF, of size BUFSIZ.  */
 307 extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __THROW;
 308 /* Make STREAM use buffering mode MODE.
 309    If BUF is not NULL, use N bytes of it for buffering;
 310    else allocate an internal buffer N bytes long.  */
 311 extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf,
 312                     int __modes, size_t __n) __THROW;
 313 __END_NAMESPACE_STD
 314
 315 #ifdef  __USE_BSD
 316 /* If BUF is NULL, make STREAM unbuffered.
 317    Else make it use SIZE bytes of BUF for buffering.  */
 318 extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf,
 319                        size_t __size) __THROW;
 320
 321 /* Make STREAM line-buffered.  */
 322 extern void setlinebuf (FILE *__stream) __THROW;
 323 #endif
 324
 325
 326 __BEGIN_NAMESPACE_STD
 327 /* Write formatted output to STREAM.
 328
 329    This function is a possible cancellation point and therefore not
 330    marked with __THROW.  */
 331 extern int fprintf (FILE *__restrict __stream,
 332                     __const char *__restrict __format, ...);
 333 /* Write formatted output to stdout.
 334
 335    This function is a possible cancellation point and therefore not
 336    marked with __THROW.  */
 337 extern int printf (__const char *__restrict __format, ...);
 338 /* Write formatted output to S.  */
 339 extern int sprintf (char *__restrict __s,
 340                     __const char *__restrict __format, ...) __THROW;
 341
 342 /* Write formatted output to S from argument list ARG.
 343
 344    This function is a possible cancellation point and therefore not
 345    marked with __THROW.  */
 346 extern int vfprintf (FILE *__restrict __s, __const char *__restrict __format,
 347                      _G_va_list __arg);
 348 /* Write formatted output to stdout from argument list ARG.
 349
 350    This function is a possible cancellation point and therefore not
 351    marked with __THROW.  */
 352 extern int vprintf (__const char *__restrict __format, _G_va_list __arg);
 353 /* Write formatted output to S from argument list ARG.  */
 354 extern int vsprintf (char *__restrict __s, __const char *__restrict __format,
 355                      _G_va_list __arg) __THROW;
 356 __END_NAMESPACE_STD
 357
 358 #if defined __USE_BSD || defined __USE_ISOC99 || defined __USE_UNIX98
 359 __BEGIN_NAMESPACE_C99
 360 /* Maximum chars of output to write in MAXLEN.  */
 361 extern int snprintf (char *__restrict __s, size_t __maxlen,
 362                      __const char *__restrict __format, ...)
 363      __THROW __attribute__ ((__format__ (__printf__, 3, 4)));
 364
 365 extern int vsnprintf (char *__restrict __s, size_t __maxlen,
 366                       __const char *__restrict __format, _G_va_list __arg)
 367      __THROW __attribute__ ((__format__ (__printf__, 3, 0)));
 368 __END_NAMESPACE_C99
 369 #endif
 370
 371 #ifdef __USE_GNU
 372 /* Write formatted output to a string dynamically allocated with `malloc'.
 373    Store the address of the string in *PTR.  */
 374 extern int vasprintf (char **__restrict __ptr, __const char *__restrict __f,
 375                       _G_va_list __arg)
 376      __THROW __attribute__ ((__format__ (__printf__, 2, 0))) __wur;
 377 extern int __asprintf (char **__restrict __ptr,
 378                        __const char *__restrict __fmt, ...)
 379      __THROW __attribute__ ((__format__ (__printf__, 2, 3))) __wur;
 380 extern int asprintf (char **__restrict __ptr,
 381                      __const char *__restrict __fmt, ...)
 382      __THROW __attribute__ ((__format__ (__printf__, 2, 3))) __wur;
 383
 384 /* Write formatted output to a file descriptor.
 385
 386    These functions are not part of POSIX and therefore no official
 387    cancellation point.  But due to similarity with an POSIX interface
 388    or due to the implementation they are cancellation points and
 389    therefore not marked with __THROW.  */
 390 extern int vdprintf (int __fd, __const char *__restrict __fmt,
 391                      _G_va_list __arg)
 392      __attribute__ ((__format__ (__printf__, 2, 0)));
 393 extern int dprintf (int __fd, __const char *__restrict __fmt, ...)
 394      __attribute__ ((__format__ (__printf__, 2, 3)));
 395 #endif
 396
 397
 398 __BEGIN_NAMESPACE_STD
 399 /* Read formatted input from STREAM.
 400
 401    This function is a possible cancellation point and therefore not
 402    marked with __THROW.  */
 403 extern int fscanf (FILE *__restrict __stream,
 404                    __const char *__restrict __format, ...) __wur;
 405 /* Read formatted input from stdin.
 406
 407    This function is a possible cancellation point and therefore not
 408    marked with __THROW.  */
 409 extern int scanf (__const char *__restrict __format, ...) __wur;
 410 /* Read formatted input from S.  */
 411 extern int sscanf (__const char *__restrict __s,
 412                    __const char *__restrict __format, ...) __THROW;
 413
 414 #if defined __USE_ISOC99 && !defined __USE_GNU \
 415     && (!defined __LDBL_COMPAT || !defined __REDIRECT) \
 416     && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K)
 417 # ifdef __REDIRECT
 418 /* For strict ISO C99 or POSIX compliance disallow %as, %aS and %a[
 419    GNU extension which conflicts with valid %a followed by letter
 420    s, S or [.  */
 421 extern int __REDIRECT (fscanf, (FILE *__restrict __stream,
 422                                 __const char *__restrict __format, ...),
 423                        __isoc99_fscanf) __wur;
 424 extern int __REDIRECT (scanf, (__const char *__restrict __format, ...),
 425                        __isoc99_scanf) __wur;
 426 extern int __REDIRECT (sscanf, (__const char *__restrict __s,
 427                                 __const char *__restrict __format, ...),
 428                        __isoc99_sscanf) __THROW;
 429 # else
 430 extern int __isoc99_fscanf (FILE *__restrict __stream,
 431                             __const char *__restrict __format, ...) __wur;
 432 extern int __isoc99_scanf (__const char *__restrict __format, ...) __wur;
 433 extern int __isoc99_sscanf (__const char *__restrict __s,
 434                             __const char *__restrict __format, ...) __THROW;
 435 #  define fscanf __isoc99_fscanf
 436 #  define scanf __isoc99_scanf
 437 #  define sscanf __isoc99_sscanf
 438 # endif
 439 #endif
 440
 441 __END_NAMESPACE_STD
 442
 443 #ifdef  __USE_ISOC99
 444 __BEGIN_NAMESPACE_C99
 445 /* Read formatted input from S into argument list ARG.
 446
 447    This function is a possible cancellation point and therefore not
 448    marked with __THROW.  */
 449 extern int vfscanf (FILE *__restrict __s, __const char *__restrict __format,
 450                     _G_va_list __arg)
 451      __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
 452
 453 /* Read formatted input from stdin into argument list ARG.
 454
 455    This function is a possible cancellation point and therefore not
 456    marked with __THROW.  */
 457 extern int vscanf (__const char *__restrict __format, _G_va_list __arg)
 458      __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
 459
 460 /* Read formatted input from S into argument list ARG.  */
 461 extern int vsscanf (__const char *__restrict __s,
 462                     __const char *__restrict __format, _G_va_list __arg)
 463      __THROW __attribute__ ((__format__ (__scanf__, 2, 0)));
 464
 465 # if !defined __USE_GNU \
 466      && (!defined __LDBL_COMPAT || !defined __REDIRECT) \
 467      && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K)
 468 #  ifdef __REDIRECT
 469 /* For strict ISO C99 or POSIX compliance disallow %as, %aS and %a[
 470    GNU extension which conflicts with valid %a followed by letter
 471    s, S or [.  */
 472 extern int __REDIRECT (vfscanf,
 473                        (FILE *__restrict __s,
 474                         __const char *__restrict __format, _G_va_list __arg),
 475                        __isoc99_vfscanf)
 476      __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
 477 extern int __REDIRECT (vscanf, (__const char *__restrict __format,
 478                                 _G_va_list __arg), __isoc99_vfscanf)
 479      __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
 480 extern int __REDIRECT (vsscanf,
 481                        (__const char *__restrict __s,
 482                         __const char *__restrict __format, _G_va_list __arg),
 483                        __isoc99_vsscanf)
 484      __THROW __attribute__ ((__format__ (__scanf__, 2, 0)));
 485 #  else
 486 extern int __isoc99_vfscanf (FILE *__restrict __s,
 487                              __const char *__restrict __format,
 488                              _G_va_list __arg) __wur;
 489 extern int __isoc99_vscanf (__const char *__restrict __format,
 490                             _G_va_list __arg) __wur;
 491 extern int __isoc99_vsscanf (__const char *__restrict __s,
 492                              __const char *__restrict __format,
 493                              _G_va_list __arg) __THROW;
 494 #   define vfscanf __isoc99_vfscanf
 495 #   define vscanf __isoc99_vscanf
 496 #   define vsscanf __isoc99_vsscanf
 497 #  endif
 498 # endif
 499
 500 __END_NAMESPACE_C99
 501 #endif /* Use ISO C9x.  */
 502
 503
 504 __BEGIN_NAMESPACE_STD
 505 /* Read a character from STREAM.
 506
 507    These functions are possible cancellation points and therefore not
 508    marked with __THROW.  */
 509 extern int fgetc (FILE *__stream);
 510 extern int getc (FILE *__stream);
 511
 512 /* Read a character from stdin.
 513
 514    This function is a possible cancellation point and therefore not
 515    marked with __THROW.  */
 516 extern int getchar (void);
 517 __END_NAMESPACE_STD
 518
 519 /* The C standard explicitly says this is a macro, so we always do the
 520    optimization for it.  */
 521 #define getc(_fp) _IO_getc (_fp)
 522
 523 #if defined __USE_POSIX || defined __USE_MISC
 524 /* These are defined in POSIX.1:1996.
 525
 526    These functions are possible cancellation points and therefore not
 527    marked with __THROW.  */
 528 extern int getc_unlocked (FILE *__stream);
 529 extern int getchar_unlocked (void);
 530 #endif /* Use POSIX or MISC.  */
 531
 532 #ifdef __USE_MISC
 533 /* Faster version when locking is not necessary.
 534
 535    This function is not part of POSIX and therefore no official
 536    cancellation point.  But due to similarity with an POSIX interface
 537    or due to the implementation it is a cancellation point and
 538    therefore not marked with __THROW.  */
 539 extern int fgetc_unlocked (FILE *__stream);
 540 #endif /* Use MISC.  */
 541
 542
 543 __BEGIN_NAMESPACE_STD
 544 /* Write a character to STREAM.
 545
 546    These functions are possible cancellation points and therefore not
 547    marked with __THROW.
 548
 549    These functions is a possible cancellation point and therefore not
 550    marked with __THROW.  */
 551 extern int fputc (int __c, FILE *__stream);
 552 extern int putc (int __c, FILE *__stream);
 553
 554 /* Write a character to stdout.
 555
 556    This function is a possible cancellation point and therefore not
 557    marked with __THROW.  */
 558 extern int putchar (int __c);
 559 __END_NAMESPACE_STD
 560
 561 /* The C standard explicitly says this can be a macro,
 562    so we always do the optimization for it.  */
 563 #define putc(_ch, _fp) _IO_putc (_ch, _fp)
 564
 565 #ifdef __USE_MISC
 566 /* Faster version when locking is not necessary.
 567
 568    This function is not part of POSIX and therefore no official
 569    cancellation point.  But due to similarity with an POSIX interface
 570    or due to the implementation it is a cancellation point and
 571    therefore not marked with __THROW.  */
 572 extern int fputc_unlocked (int __c, FILE *__stream);
 573 #endif /* Use MISC.  */
 574
 575 #if defined __USE_POSIX || defined __USE_MISC
 576 /* These are defined in POSIX.1:1996.
 577
 578    These functions are possible cancellation points and therefore not
 579    marked with __THROW.  */
 580 extern int putc_unlocked (int __c, FILE *__stream);
 581 extern int putchar_unlocked (int __c);
 582 #endif /* Use POSIX or MISC.  */
 583
 584
 585 #if defined __USE_SVID || defined __USE_MISC \
 586     || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
 587 /* Get a word (int) from STREAM.  */
 588 extern int getw (FILE *__stream);
 589
 590 /* Write a word (int) to STREAM.  */
 591 extern int putw (int __w, FILE *__stream);
 592 #endif
 593
 594
 595 __BEGIN_NAMESPACE_STD
 596 /* Get a newline-terminated string of finite length from STREAM.
 597
 598    This function is a possible cancellation point and therefore not
 599    marked with __THROW.  */
 600 extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
 601      __wur;
 602
 603 /* Get a newline-terminated string from stdin, removing the newline.
 604    DO NOT USE THIS FUNCTION!!  There is no limit on how much it will read.
 605
 606    This function is a possible cancellation point and therefore not
 607    marked with __THROW.  */
 608 extern char *gets (char *__s) __wur;
 609 __END_NAMESPACE_STD
 610
 611 #ifdef __USE_GNU
 612 /* This function does the same as `fgets' but does not lock the stream.
 613
 614    This function is not part of POSIX and therefore no official
 615    cancellation point.  But due to similarity with an POSIX interface
 616    or due to the implementation it is a cancellation point and
 617    therefore not marked with __THROW.  */
 618 extern char *fgets_unlocked (char *__restrict __s, int __n,
 619                              FILE *__restrict __stream) __wur;
 620 #endif
 621
 622
 623 #ifdef  __USE_GNU
 624 /* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
 625    (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
 626    NULL), pointing to *N characters of space.  It is realloc'd as
 627    necessary.  Returns the number of characters read (not including the
 628    null terminator), or -1 on error or EOF.
 629
 630    These functions are not part of POSIX and therefore no official
 631    cancellation point.  But due to similarity with an POSIX interface
 632    or due to the implementation they are cancellation points and
 633    therefore not marked with __THROW.  */
 634 extern _IO_ssize_t __getdelim (char **__restrict __lineptr,
 635                                size_t *__restrict __n, int __delimiter,
 636                                FILE *__restrict __stream) __wur;
 637 extern _IO_ssize_t getdelim (char **__restrict __lineptr,
 638                              size_t *__restrict __n, int __delimiter,
 639                              FILE *__restrict __stream) __wur;
 640
 641 /* Like `getdelim', but reads up to a newline.
 642
 643    This function is not part of POSIX and therefore no official
 644    cancellation point.  But due to similarity with an POSIX interface
 645    or due to the implementation it is a cancellation point and
 646    therefore not marked with __THROW.  */
 647 extern _IO_ssize_t getline (char **__restrict __lineptr,
 648                             size_t *__restrict __n,
 649                             FILE *__restrict __stream) __wur;
 650 #endif
 651
 652
 653 __BEGIN_NAMESPACE_STD
 654 /* Write a string to STREAM.
 655
 656    This function is a possible cancellation points and therefore not
 657    marked with __THROW.  */
 658 extern int fputs (__const char *__restrict __s, FILE *__restrict __stream);
 659
 660 /* Write a string, followed by a newline, to stdout.
 661
 662    This function is a possible cancellation points and therefore not
 663    marked with __THROW.  */
 664 extern int puts (__const char *__s);
 665
 666
 667 /* Push a character back onto the input buffer of STREAM.
 668
 669    This function is a possible cancellation points and therefore not
 670    marked with __THROW.  */
 671 extern int ungetc (int __c, FILE *__stream);
 672
 673
 674 /* Read chunks of generic data from STREAM.
 675
 676    This function is a possible cancellation points and therefore not
 677    marked with __THROW.  */
 678 extern size_t fread (void *__restrict __ptr, size_t __size,
 679                      size_t __n, FILE *__restrict __stream) __wur;
 680 /* Write chunks of generic data to STREAM.
 681
 682    This function is a possible cancellation points and therefore not
 683    marked with __THROW.  */
 684 extern size_t fwrite (__const void *__restrict __ptr, size_t __size,
 685                       size_t __n, FILE *__restrict __s) __wur;
 686 __END_NAMESPACE_STD
 687
 688 #ifdef __USE_GNU
 689 /* This function does the same as `fputs' but does not lock the stream.
 690
 691    This function is not part of POSIX and therefore no official
 692    cancellation point.  But due to similarity with an POSIX interface
 693    or due to the implementation it is a cancellation point and
 694    therefore not marked with __THROW.  */
 695 extern int fputs_unlocked (__const char *__restrict __s,
 696                            FILE *__restrict __stream);
 697 #endif
 698
 699 #ifdef __USE_MISC
 700 /* Faster versions when locking is not necessary.
 701
 702    These functions are not part of POSIX and therefore no official
 703    cancellation point.  But due to similarity with an POSIX interface
 704    or due to the implementation they are cancellation points and
 705    therefore not marked with __THROW.  */
 706 extern size_t fread_unlocked (void *__restrict __ptr, size_t __size,
 707                               size_t __n, FILE *__restrict __stream) __wur;
 708 extern size_t fwrite_unlocked (__const void *__restrict __ptr, size_t __size,
 709                                size_t __n, FILE *__restrict __stream) __wur;
 710 #endif
 711
 712
 713 __BEGIN_NAMESPACE_STD
 714 /* Seek to a certain position on STREAM.
 715
 716    This function is a possible cancellation point and therefore not
 717    marked with __THROW.  */
 718 extern int fseek (FILE *__stream, long int __off, int __whence);
 719 /* Return the current position of STREAM.
 720
 721    This function is a possible cancellation point and therefore not
 722    marked with __THROW.  */
 723 extern long int ftell (FILE *__stream) __wur;
 724 /* Rewind to the beginning of STREAM.
 725
 726    This function is a possible cancellation point and therefore not
 727    marked with __THROW.  */
 728 extern void rewind (FILE *__stream);
 729 __END_NAMESPACE_STD
 730
 731 /* The Single Unix Specification, Version 2, specifies an alternative,
 732    more adequate interface for the two functions above which deal with
 733    file offset.  `long int' is not the right type.  These definitions
 734    are originally defined in the Large File Support API.  */
 735
 736 #if defined __USE_LARGEFILE || defined __USE_XOPEN2K
 737 # ifndef __USE_FILE_OFFSET64
 738 /* Seek to a certain position on STREAM.
 739
 740    This function is a possible cancellation point and therefore not
 741    marked with __THROW.  */
 742 extern int fseeko (FILE *__stream, __off_t __off, int __whence);
 743 /* Return the current position of STREAM.
 744
 745    This function is a possible cancellation point and therefore not
 746    marked with __THROW.  */
 747 extern __off_t ftello (FILE *__stream) __wur;
 748 # else
 749 #  ifdef __REDIRECT
 750 extern int __REDIRECT (fseeko,
 751                        (FILE *__stream, __off64_t __off, int __whence),
 752                        fseeko64);
 753 extern __off64_t __REDIRECT (ftello, (FILE *__stream), ftello64);
 754 #  else
 755 #   define fseeko fseeko64
 756 #   define ftello ftello64
 757 #  endif
 758 # endif
 759 #endif
 760
 761 __BEGIN_NAMESPACE_STD
 762 #ifndef __USE_FILE_OFFSET64
 763 /* Get STREAM's position.
 764
 765    This function is a possible cancellation point and therefore not
 766    marked with __THROW.  */
 767 extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos);
 768 /* Set STREAM's position.
 769
 770    This function is a possible cancellation point and therefore not
 771    marked with __THROW.  */
 772 extern int fsetpos (FILE *__stream, __const fpos_t *__pos);
 773 #else
 774 # ifdef __REDIRECT
 775 extern int __REDIRECT (fgetpos, (FILE *__restrict __stream,
 776                                  fpos_t *__restrict __pos), fgetpos64);
 777 extern int __REDIRECT (fsetpos,
 778                        (FILE *__stream, __const fpos_t *__pos), fsetpos64);
 779 # else
 780 #  define fgetpos fgetpos64
 781 #  define fsetpos fsetpos64
 782 # endif
 783 #endif
 784 __END_NAMESPACE_STD
 785
 786 #ifdef __USE_LARGEFILE64
 787 extern int fseeko64 (FILE *__stream, __off64_t __off, int __whence);
 788 extern __off64_t ftello64 (FILE *__stream) __wur;
 789 extern int fgetpos64 (FILE *__restrict __stream, fpos64_t *__restrict __pos);
 790 extern int fsetpos64 (FILE *__stream, __const fpos64_t *__pos);
 791 #endif
 792
 793 __BEGIN_NAMESPACE_STD
 794 /* Clear the error and EOF indicators for STREAM.  */
 795 extern void clearerr (FILE *__stream) __THROW;
 796 /* Return the EOF indicator for STREAM.  */
 797 extern int feof (FILE *__stream) __THROW __wur;
 798 /* Return the error indicator for STREAM.  */
 799 extern int ferror (FILE *__stream) __THROW __wur;
 800 __END_NAMESPACE_STD
 801
 802 #ifdef __USE_MISC
 803 /* Faster versions when locking is not required.  */
 804 extern void clearerr_unlocked (FILE *__stream) __THROW;
 805 extern int feof_unlocked (FILE *__stream) __THROW __wur;
 806 extern int ferror_unlocked (FILE *__stream) __THROW __wur;
 807 #endif
 808
 809
 810 __BEGIN_NAMESPACE_STD
 811 /* Print a message describing the meaning of the value of errno.
 812
 813    This function is a possible cancellation point and therefore not
 814    marked with __THROW.  */
 815 extern void perror (__const char *__s);
 816 __END_NAMESPACE_STD
 817
 818 /* Provide the declarations for `sys_errlist' and `sys_nerr' if they
 819    are available on this system.  Even if available, these variables
 820    should not be used directly.  The `strerror' function provides
 821    all the necessary functionality.  */
 822 #include <bits/sys_errlist.h>
 823
 824
 825 #ifdef  __USE_POSIX
 826 /* Return the system file descriptor for STREAM.  */
 827 extern int fileno (FILE *__stream) __THROW __wur;
 828 #endif /* Use POSIX.  */
 829
 830 #ifdef __USE_MISC
 831 /* Faster version when locking is not required.  */
 832 extern int fileno_unlocked (FILE *__stream) __THROW __wur;
 833 #endif
 834
 835
 836 #if (defined __USE_POSIX2 || defined __USE_SVID  || defined __USE_BSD || \
 837      defined __USE_MISC)
 838 /* Create a new stream connected to a pipe running the given command.
 839
 840    This function is a possible cancellation point and therefore not
 841    marked with __THROW.  */
 842 extern FILE *popen (__const char *__command, __const char *__modes) __wur;
 843
 844 /* Close a stream opened by popen and return the status of its child.
 845
 846    This function is a possible cancellation point and therefore not
 847    marked with __THROW.  */
 848 extern int pclose (FILE *__stream);
 849 #endif
 850
 851
 852 #ifdef  __USE_POSIX
 853 /* Return the name of the controlling terminal.  */
 854 extern char *ctermid (char *__s) __THROW;
 855 #endif /* Use POSIX.  */
 856
 857
 858 #ifdef __USE_XOPEN
 859 /* Return the name of the current user.  */
 860 extern char *cuserid (char *__s);
 861 #endif /* Use X/Open, but not issue 6.  */
 862
 863
 864 #ifdef  __USE_GNU
 865 struct obstack;                 /* See <obstack.h>.  */
 866
 867 /* Write formatted output to an obstack.  */
 868 extern int obstack_printf (struct obstack *__restrict __obstack,
 869                            __const char *__restrict __format, ...)
 870      __THROW __attribute__ ((__format__ (__printf__, 2, 3)));
 871 extern int obstack_vprintf (struct obstack *__restrict __obstack,
 872                             __const char *__restrict __format,
 873                             _G_va_list __args)
 874      __THROW __attribute__ ((__format__ (__printf__, 2, 0)));
 875 #endif /* Use GNU.  */
 876
 877
 878 #if defined __USE_POSIX || defined __USE_MISC
 879 /* These are defined in POSIX.1:1996.  */
 880
 881 /* Acquire ownership of STREAM.  */
 882 extern void flockfile (FILE *__stream) __THROW;
 883
 884 /* Try to acquire ownership of STREAM but do not block if it is not
 885    possible.  */
 886 extern int ftrylockfile (FILE *__stream) __THROW __wur;
 887
 888 /* Relinquish the ownership granted for STREAM.  */
 889 extern void funlockfile (FILE *__stream) __THROW;
 890 #endif /* POSIX || misc */
 891
 892 #if defined __USE_XOPEN && !defined __USE_XOPEN2K && !defined __USE_GNU
 893 /* The X/Open standard requires some functions and variables to be
 894    declared here which do not belong into this header.  But we have to
 895    follow.  In GNU mode we don't do this nonsense.  */
 896 # define __need_getopt
 897 # include <getopt.h>
 898 #endif  /* X/Open, but not issue 6 and not for GNU.  */
 899
 900 /* If we are compiling with optimizing read this file.  It contains
 901    several optimizing inline functions and macros.  */
 902 #ifdef __USE_EXTERN_INLINES
 903 # include <bits/stdio.h>
 904 #endif
 905 #if __USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline
 906 # include <bits/stdio2.h>
 907 #endif
 908 #ifdef __LDBL_COMPAT
 909 # include <bits/stdio-ldbl.h>
 910 #endif
 911
 912 __END_DECLS
 913
 914 #endif /* <stdio.h> included.  */
 915
 916 #endif /* !_STDIO_H */