libio/stdio.h

   1 /* Define ISO C stdio on top of C++ iostreams.
   2    Copyright (C) 1991,1994-2002,2003,2004 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 __BEGIN_NAMESPACE_STD
  45 /* The opaque type of streams.  This is the definition used elsewhere.  */
  46 typedef struct _IO_FILE FILE;
  47 __END_NAMESPACE_STD
  48 #if defined __USE_LARGEFILE64 || defined __USE_SVID || defined __USE_POSIX \
  49     || defined __USE_BSD || defined __USE_ISOC99 || defined __USE_XOPEN \
  50     || defined __USE_POSIX2
  51 __USING_NAMESPACE_STD(FILE)
  52 #endif
  53
  54 # define __FILE_defined 1
  55 #endif /* FILE not defined.  */
  56 #undef  __need_FILE
  57
  58
  59 #if !defined ____FILE_defined && defined __need___FILE
  60
  61 /* The opaque type of streams.  This is the definition used elsewhere.  */
  62 typedef struct _IO_FILE __FILE;
  63
  64 # define ____FILE_defined       1
  65 #endif /* __FILE not defined.  */
  66 #undef  __need___FILE
  67
  68
  69 #ifdef  _STDIO_H
  70 #define _STDIO_USES_IOSTREAM
  71
  72 #include <libio.h>
  73
  74 #ifdef __USE_XOPEN
  75 # ifdef __GNUC__
  76 #  ifndef _VA_LIST_DEFINED
  77 typedef _G_va_list va_list;
  78 #   define _VA_LIST_DEFINED
  79 #  endif
  80 # else
  81 #  include <stdarg.h>
  82 # endif
  83 #endif
  84
  85 /* The type of the second argument to `fgetpos' and `fsetpos'.  */
  86 __BEGIN_NAMESPACE_STD
  87 #ifndef __USE_FILE_OFFSET64
  88 typedef _G_fpos_t fpos_t;
  89 #else
  90 typedef _G_fpos64_t fpos_t;
  91 #endif
  92 __END_NAMESPACE_STD
  93 #ifdef __USE_LARGEFILE64
  94 typedef _G_fpos64_t fpos64_t;
  95 #endif
  96
  97 /* The possibilities for the third argument to `setvbuf'.  */
  98 #define _IOFBF 0                /* Fully buffered.  */
  99 #define _IOLBF 1                /* Line buffered.  */
 100 #define _IONBF 2                /* No buffering.  */
 101
 102
 103 /* Default buffer size.  */
 104 #ifndef BUFSIZ
 105 # define BUFSIZ _IO_BUFSIZ
 106 #endif
 107
 108
 109 /* End of file character.
 110    Some things throughout the library rely on this being -1.  */
 111 #ifndef EOF
 112 # define EOF (-1)
 113 #endif
 114
 115
 116 /* The possibilities for the third argument to `fseek'.
 117    These values should not be changed.  */
 118 #define SEEK_SET        0       /* Seek from beginning of file.  */
 119 #define SEEK_CUR        1       /* Seek from current position.  */
 120 #define SEEK_END        2       /* Seek from end of file.  */
 121
 122
 123 #if defined __USE_SVID || defined __USE_XOPEN
 124 /* Default path prefix for `tempnam' and `tmpnam'.  */
 125 # define P_tmpdir       "/tmp"
 126 #endif
 127
 128
 129 /* Get the values:
 130    L_tmpnam     How long an array of chars must be to be passed to `tmpnam'.
 131    TMP_MAX      The minimum number of unique filenames generated by tmpnam
 132                 (and tempnam when it uses tmpnam's name space),
 133                 or tempnam (the two are separate).
 134    L_ctermid    How long an array to pass to `ctermid'.
 135    L_cuserid    How long an array to pass to `cuserid'.
 136    FOPEN_MAX    Minimum number of files that can be open at once.
 137    FILENAME_MAX Maximum length of a filename.  */
 138 #include <bits/stdio_lim.h>
 139
 140
 141 /* Standard streams.  */
 142 extern struct _IO_FILE *stdin;          /* Standard input stream.  */
 143 extern struct _IO_FILE *stdout;         /* Standard output stream.  */
 144 extern struct _IO_FILE *stderr;         /* Standard error output stream.  */
 145 #ifdef __STDC__
 146 /* C89/C99 say they're macros.  Make them happy.  */
 147 #define stdin stdin
 148 #define stdout stdout
 149 #define stderr stderr
 150 #endif
 151
 152 __BEGIN_NAMESPACE_STD
 153 /* Remove file FILENAME.  */
 154 extern int remove (__const char *__filename) __THROW;
 155 /* Rename file OLD to NEW.  */
 156 extern int rename (__const char *__old, __const char *__new) __THROW;
 157 __END_NAMESPACE_STD
 158
 159
 160 __BEGIN_NAMESPACE_STD
 161 /* Create a temporary file and open it read/write.
 162
 163    This function is a possible cancellation points and therefore not
 164    marked with __THROW.  */
 165 #ifndef __USE_FILE_OFFSET64
 166 extern FILE *tmpfile (void);
 167 #else
 168 # ifdef __REDIRECT
 169 extern FILE *__REDIRECT (tmpfile, (void), tmpfile64);
 170 # else
 171 #  define tmpfile tmpfile64
 172 # endif
 173 #endif
 174
 175 #ifdef __USE_LARGEFILE64
 176 extern FILE *tmpfile64 (void);
 177 #endif
 178
 179 /* Generate a temporary filename.  */
 180 extern char *tmpnam (char *__s) __THROW;
 181 __END_NAMESPACE_STD
 182
 183 #ifdef __USE_MISC
 184 /* This is the reentrant variant of `tmpnam'.  The only difference is
 185    that it does not allow S to be NULL.  */
 186 extern char *tmpnam_r (char *__s) __THROW;
 187 #endif
 188
 189
 190 #if defined __USE_SVID || defined __USE_XOPEN
 191 /* Generate a unique temporary filename using up to five characters of PFX
 192    if it is not NULL.  The directory to put this file in is searched for
 193    as follows: First the environment variable "TMPDIR" is checked.
 194    If it contains the name of a writable directory, that directory is used.
 195    If not and if DIR is not NULL, that value is checked.  If that fails,
 196    P_tmpdir is tried and finally "/tmp".  The storage for the filename
 197    is allocated by `malloc'.  */
 198 extern char *tempnam (__const char *__dir, __const char *__pfx)
 199      __THROW __attribute_malloc__;
 200 #endif
 201
 202
 203 __BEGIN_NAMESPACE_STD
 204 /* Close STREAM.
 205
 206    This function is a possible cancellation point and therefore not
 207    marked with __THROW.  */
 208 extern int fclose (FILE *__stream);
 209 /* Flush STREAM, or all streams if STREAM is NULL.
 210
 211    This function is a possible cancellation point and therefore not
 212    marked with __THROW.  */
 213 extern int fflush (FILE *__stream);
 214 __END_NAMESPACE_STD
 215
 216 #ifdef __USE_MISC
 217 /* Faster versions when locking is not required.
 218
 219    This function is not part of POSIX and therefore no official
 220    cancellation point.  But due to similarity with an POSIX interface
 221    or due to the implementation it is a cancellation point and
 222    therefore not marked with __THROW.  */
 223 extern int fflush_unlocked (FILE *__stream);
 224 #endif
 225
 226 #ifdef __USE_GNU
 227 /* Close all streams.
 228
 229    This function is not part of POSIX and therefore no official
 230    cancellation point.  But due to similarity with an POSIX interface
 231    or due to the implementation it is a cancellation point and
 232    therefore not marked with __THROW.  */
 233 extern int fcloseall (void);
 234 #endif
 235
 236
 237 __BEGIN_NAMESPACE_STD
 238 #ifndef __USE_FILE_OFFSET64
 239 /* Open a file and create a new stream for it.
 240
 241    This function is a possible cancellation point and therefore not
 242    marked with __THROW.  */
 243 extern FILE *fopen (__const char *__restrict __filename,
 244                     __const char *__restrict __modes);
 245 /* Open a file, replacing an existing stream with it.
 246
 247    This function is a possible cancellation point and therefore not
 248    marked with __THROW.  */
 249 extern FILE *freopen (__const char *__restrict __filename,
 250                       __const char *__restrict __modes,
 251                       FILE *__restrict __stream);
 252 #else
 253 # ifdef __REDIRECT
 254 extern FILE *__REDIRECT (fopen, (__const char *__restrict __filename,
 255                                  __const char *__restrict __modes), fopen64);
 256 extern FILE *__REDIRECT (freopen, (__const char *__restrict __filename,
 257                                    __const char *__restrict __modes,
 258                                    FILE *__restrict __stream), freopen64);
 259 # else
 260 #  define fopen fopen64
 261 #  define freopen freopen64
 262 # endif
 263 #endif
 264 __END_NAMESPACE_STD
 265 #ifdef __USE_LARGEFILE64
 266 extern FILE *fopen64 (__const char *__restrict __filename,
 267                       __const char *__restrict __modes);
 268 extern FILE *freopen64 (__const char *__restrict __filename,
 269                         __const char *__restrict __modes,
 270                         FILE *__restrict __stream);
 271 #endif
 272
 273 #ifdef  __USE_POSIX
 274 /* Create a new stream that refers to an existing system file descriptor.  */
 275 extern FILE *fdopen (int __fd, __const char *__modes) __THROW;
 276 #endif
 277
 278 #ifdef  __USE_GNU
 279 /* Create a new stream that refers to the given magic cookie,
 280    and uses the given functions for input and output.  */
 281 extern FILE *fopencookie (void *__restrict __magic_cookie,
 282                           __const char *__restrict __modes,
 283                           _IO_cookie_io_functions_t __io_funcs) __THROW;
 284
 285 /* Create a new stream that refers to a memory buffer.  */
 286 extern FILE *fmemopen (void *__s, size_t __len, __const char *__modes) __THROW;
 287
 288 /* Open a stream that writes into a malloc'd buffer that is expanded as
 289    necessary.  *BUFLOC and *SIZELOC are updated with the buffer's location
 290    and the number of characters written on fflush or fclose.  */
 291 extern FILE *open_memstream (char **__restrict __bufloc,
 292                              size_t *__restrict __sizeloc) __THROW;
 293 #endif
 294
 295
 296 __BEGIN_NAMESPACE_STD
 297 /* If BUF is NULL, make STREAM unbuffered.
 298    Else make it use buffer BUF, of size BUFSIZ.  */
 299 extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __THROW;
 300 /* Make STREAM use buffering mode MODE.
 301    If BUF is not NULL, use N bytes of it for buffering;
 302    else allocate an internal buffer N bytes long.  */
 303 extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf,
 304                     int __modes, size_t __n) __THROW;
 305 __END_NAMESPACE_STD
 306
 307 #ifdef  __USE_BSD
 308 /* If BUF is NULL, make STREAM unbuffered.
 309    Else make it use SIZE bytes of BUF for buffering.  */
 310 extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf,
 311                        size_t __size) __THROW;
 312
 313 /* Make STREAM line-buffered.  */
 314 extern void setlinebuf (FILE *__stream) __THROW;
 315 #endif
 316
 317
 318 __BEGIN_NAMESPACE_STD
 319 /* Write formatted output to STREAM.
 320
 321    This function is a possible cancellation point and therefore not
 322    marked with __THROW.  */
 323 extern int fprintf (FILE *__restrict __stream,
 324                     __const char *__restrict __format, ...);
 325 /* Write formatted output to stdout.
 326
 327    This function is a possible cancellation point and therefore not
 328    marked with __THROW.  */
 329 extern int printf (__const char *__restrict __format, ...);
 330 /* Write formatted output to S.  */
 331 extern int sprintf (char *__restrict __s,
 332                     __const char *__restrict __format, ...) __THROW;
 333
 334 /* Write formatted output to S from argument list ARG.
 335
 336    This function is a possible cancellation point and therefore not
 337    marked with __THROW.  */
 338 extern int vfprintf (FILE *__restrict __s, __const char *__restrict __format,
 339                      _G_va_list __arg);
 340 /* Write formatted output to stdout from argument list ARG.
 341
 342    This function is a possible cancellation point and therefore not
 343    marked with __THROW.  */
 344 extern int vprintf (__const char *__restrict __format, _G_va_list __arg);
 345 /* Write formatted output to S from argument list ARG.  */
 346 extern int vsprintf (char *__restrict __s, __const char *__restrict __format,
 347                      _G_va_list __arg) __THROW;
 348 __END_NAMESPACE_STD
 349
 350 #if defined __USE_BSD || defined __USE_ISOC99 || defined __USE_UNIX98
 351 __BEGIN_NAMESPACE_C99
 352 /* Maximum chars of output to write in MAXLEN.  */
 353 extern int snprintf (char *__restrict __s, size_t __maxlen,
 354                      __const char *__restrict __format, ...)
 355      __THROW __attribute__ ((__format__ (__printf__, 3, 4)));
 356
 357 extern int vsnprintf (char *__restrict __s, size_t __maxlen,
 358                       __const char *__restrict __format, _G_va_list __arg)
 359      __THROW __attribute__ ((__format__ (__printf__, 3, 0)));
 360 __END_NAMESPACE_C99
 361 #endif
 362
 363 #ifdef __USE_GNU
 364 /* Write formatted output to a string dynamically allocated with `malloc'.
 365    Store the address of the string in *PTR.  */
 366 extern int vasprintf (char **__restrict __ptr, __const char *__restrict __f,
 367                       _G_va_list __arg)
 368      __THROW __attribute__ ((__format__ (__printf__, 2, 0)));
 369 extern int __asprintf (char **__restrict __ptr,
 370                        __const char *__restrict __fmt, ...)
 371      __THROW __attribute__ ((__format__ (__printf__, 2, 3)));
 372 extern int asprintf (char **__restrict __ptr,
 373                      __const char *__restrict __fmt, ...)
 374      __THROW __attribute__ ((__format__ (__printf__, 2, 3)));
 375
 376 /* Write formatted output to a file descriptor.
 377
 378    These functions are not part of POSIX and therefore no official
 379    cancellation point.  But due to similarity with an POSIX interface
 380    or due to the implementation they are cancellation points and
 381    therefore not marked with __THROW.  */
 382 extern int vdprintf (int __fd, __const char *__restrict __fmt,
 383                      _G_va_list __arg)
 384      __attribute__ ((__format__ (__printf__, 2, 0)));
 385 extern int dprintf (int __fd, __const char *__restrict __fmt, ...)
 386      __attribute__ ((__format__ (__printf__, 2, 3)));
 387 #endif
 388
 389
 390 __BEGIN_NAMESPACE_STD
 391 /* Read formatted input from STREAM.
 392
 393    This function is a possible cancellation point and therefore not
 394    marked with __THROW.  */
 395 extern int fscanf (FILE *__restrict __stream,
 396                    __const char *__restrict __format, ...);
 397 /* Read formatted input from stdin.
 398
 399    This function is a possible cancellation point and therefore not
 400    marked with __THROW.  */
 401 extern int scanf (__const char *__restrict __format, ...);
 402 /* Read formatted input from S.  */
 403 extern int sscanf (__const char *__restrict __s,
 404                    __const char *__restrict __format, ...) __THROW;
 405 __END_NAMESPACE_STD
 406
 407 #ifdef  __USE_ISOC99
 408 __BEGIN_NAMESPACE_C99
 409 /* Read formatted input from S into argument list ARG.
 410
 411    This function is a possible cancellation point and therefore not
 412    marked with __THROW.  */
 413 extern int vfscanf (FILE *__restrict __s, __const char *__restrict __format,
 414                     _G_va_list __arg)
 415      __attribute__ ((__format__ (__scanf__, 2, 0)));
 416
 417 /* Read formatted input from stdin into argument list ARG.
 418
 419    This function is a possible cancellation point and therefore not
 420    marked with __THROW.  */
 421 extern int vscanf (__const char *__restrict __format, _G_va_list __arg)
 422      __attribute__ ((__format__ (__scanf__, 1, 0)));
 423
 424 /* Read formatted input from S into argument list ARG.  */
 425 extern int vsscanf (__const char *__restrict __s,
 426                     __const char *__restrict __format, _G_va_list __arg)
 427      __THROW __attribute__ ((__format__ (__scanf__, 2, 0)));
 428 __END_NAMESPACE_C99
 429 #endif /* Use ISO C9x.  */
 430
 431
 432 __BEGIN_NAMESPACE_STD
 433 /* Read a character from STREAM.
 434
 435    These functions are possible cancellation points and therefore not
 436    marked with __THROW.  */
 437 extern int fgetc (FILE *__stream);
 438 extern int getc (FILE *__stream);
 439
 440 /* Read a character from stdin.
 441
 442    This function is a possible cancellation point and therefore not
 443    marked with __THROW.  */
 444 extern int getchar (void);
 445 __END_NAMESPACE_STD
 446
 447 /* The C standard explicitly says this is a macro, so we always do the
 448    optimization for it.  */
 449 #define getc(_fp) _IO_getc (_fp)
 450
 451 #if defined __USE_POSIX || defined __USE_MISC
 452 /* These are defined in POSIX.1:1996.
 453
 454    These functions are possible cancellation points and therefore not
 455    marked with __THROW.  */
 456 extern int getc_unlocked (FILE *__stream);
 457 extern int getchar_unlocked (void);
 458 #endif /* Use POSIX or MISC.  */
 459
 460 #ifdef __USE_MISC
 461 /* Faster version when locking is not necessary.
 462
 463    This function is not part of POSIX and therefore no official
 464    cancellation point.  But due to similarity with an POSIX interface
 465    or due to the implementation it is a cancellation point and
 466    therefore not marked with __THROW.  */
 467 extern int fgetc_unlocked (FILE *__stream);
 468 #endif /* Use MISC.  */
 469
 470
 471 __BEGIN_NAMESPACE_STD
 472 /* Write a character to STREAM.
 473
 474    These functions are possible cancellation points and therefore not
 475    marked with __THROW.
 476
 477    These functions is a possible cancellation point and therefore not
 478    marked with __THROW.  */
 479 extern int fputc (int __c, FILE *__stream);
 480 extern int putc (int __c, FILE *__stream);
 481
 482 /* Write a character to stdout.
 483
 484    This function is a possible cancellation point and therefore not
 485    marked with __THROW.  */
 486 extern int putchar (int __c);
 487 __END_NAMESPACE_STD
 488
 489 /* The C standard explicitly says this can be a macro,
 490    so we always do the optimization for it.  */
 491 #define putc(_ch, _fp) _IO_putc (_ch, _fp)
 492
 493 #ifdef __USE_MISC
 494 /* Faster version when locking is not necessary.
 495
 496    This function is not part of POSIX and therefore no official
 497    cancellation point.  But due to similarity with an POSIX interface
 498    or due to the implementation it is a cancellation point and
 499    therefore not marked with __THROW.  */
 500 extern int fputc_unlocked (int __c, FILE *__stream);
 501 #endif /* Use MISC.  */
 502
 503 #if defined __USE_POSIX || defined __USE_MISC
 504 /* These are defined in POSIX.1:1996.
 505
 506    These functions are possible cancellation points and therefore not
 507    marked with __THROW.  */
 508 extern int putc_unlocked (int __c, FILE *__stream);
 509 extern int putchar_unlocked (int __c);
 510 #endif /* Use POSIX or MISC.  */
 511
 512
 513 #if defined __USE_SVID || defined __USE_MISC \
 514     || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
 515 /* Get a word (int) from STREAM.  */
 516 extern int getw (FILE *__stream);
 517
 518 /* Write a word (int) to STREAM.  */
 519 extern int putw (int __w, FILE *__stream);
 520 #endif
 521
 522
 523 __BEGIN_NAMESPACE_STD
 524 /* Get a newline-terminated string of finite length from STREAM.
 525
 526    This function is a possible cancellation point and therefore not
 527    marked with __THROW.  */
 528 extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream);
 529
 530 /* Get a newline-terminated string from stdin, removing the newline.
 531    DO NOT USE THIS FUNCTION!!  There is no limit on how much it will read.
 532
 533    This function is a possible cancellation point and therefore not
 534    marked with __THROW.  */
 535 extern char *gets (char *__s);
 536 __END_NAMESPACE_STD
 537
 538 #ifdef __USE_GNU
 539 /* This function does the same as `fgets' but does not lock the stream.
 540
 541    This function is not part of POSIX and therefore no official
 542    cancellation point.  But due to similarity with an POSIX interface
 543    or due to the implementation it is a cancellation point and
 544    therefore not marked with __THROW.  */
 545 extern char *fgets_unlocked (char *__restrict __s, int __n,
 546                              FILE *__restrict __stream);
 547 #endif
 548
 549
 550 #ifdef  __USE_GNU
 551 /* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
 552    (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
 553    NULL), pointing to *N characters of space.  It is realloc'd as
 554    necessary.  Returns the number of characters read (not including the
 555    null terminator), or -1 on error or EOF.
 556
 557    These functions are not part of POSIX and therefore no official
 558    cancellation point.  But due to similarity with an POSIX interface
 559    or due to the implementation they are cancellation points and
 560    therefore not marked with __THROW.  */
 561 extern _IO_ssize_t __getdelim (char **__restrict __lineptr,
 562                                size_t *__restrict __n, int __delimiter,
 563                                FILE *__restrict __stream);
 564 extern _IO_ssize_t getdelim (char **__restrict __lineptr,
 565                              size_t *__restrict __n, int __delimiter,
 566                              FILE *__restrict __stream);
 567
 568 /* Like `getdelim', but reads up to a newline.
 569
 570    This function is not part of POSIX and therefore no official
 571    cancellation point.  But due to similarity with an POSIX interface
 572    or due to the implementation it is a cancellation point and
 573    therefore not marked with __THROW.  */
 574 extern _IO_ssize_t getline (char **__restrict __lineptr,
 575                             size_t *__restrict __n,
 576                             FILE *__restrict __stream);
 577 #endif
 578
 579
 580 __BEGIN_NAMESPACE_STD
 581 /* Write a string to STREAM.
 582
 583    This function is a possible cancellation points and therefore not
 584    marked with __THROW.  */
 585 extern int fputs (__const char *__restrict __s, FILE *__restrict __stream);
 586
 587 /* Write a string, followed by a newline, to stdout.
 588
 589    This function is a possible cancellation points and therefore not
 590    marked with __THROW.  */
 591 extern int puts (__const char *__s);
 592
 593
 594 /* Push a character back onto the input buffer of STREAM.
 595
 596    This function is a possible cancellation points and therefore not
 597    marked with __THROW.  */
 598 extern int ungetc (int __c, FILE *__stream);
 599
 600
 601 /* Read chunks of generic data from STREAM.
 602
 603    This function is a possible cancellation points and therefore not
 604    marked with __THROW.  */
 605 extern size_t fread (void *__restrict __ptr, size_t __size,
 606                      size_t __n, FILE *__restrict __stream);
 607 /* Write chunks of generic data to STREAM.
 608
 609    This function is a possible cancellation points and therefore not
 610    marked with __THROW.  */
 611 extern size_t fwrite (__const void *__restrict __ptr, size_t __size,
 612                       size_t __n, FILE *__restrict __s);
 613 __END_NAMESPACE_STD
 614
 615 #ifdef __USE_GNU
 616 /* This function does the same as `fputs' but does not lock the stream.
 617
 618    This function is not part of POSIX and therefore no official
 619    cancellation point.  But due to similarity with an POSIX interface
 620    or due to the implementation it is a cancellation point and
 621    therefore not marked with __THROW.  */
 622 extern int fputs_unlocked (__const char *__restrict __s,
 623                            FILE *__restrict __stream);
 624 #endif
 625
 626 #ifdef __USE_MISC
 627 /* Faster versions when locking is not necessary.
 628
 629    These functions are not part of POSIX and therefore no official
 630    cancellation point.  But due to similarity with an POSIX interface
 631    or due to the implementation they are cancellation points and
 632    therefore not marked with __THROW.  */
 633 extern size_t fread_unlocked (void *__restrict __ptr, size_t __size,
 634                               size_t __n, FILE *__restrict __stream);
 635 extern size_t fwrite_unlocked (__const void *__restrict __ptr, size_t __size,
 636                                size_t __n, FILE *__restrict __stream);
 637 #endif
 638
 639
 640 __BEGIN_NAMESPACE_STD
 641 /* Seek to a certain position on STREAM.
 642
 643    This function is a possible cancellation point and therefore not
 644    marked with __THROW.  */
 645 extern int fseek (FILE *__stream, long int __off, int __whence);
 646 /* Return the current position of STREAM.
 647
 648    This function is a possible cancellation point and therefore not
 649    marked with __THROW.  */
 650 extern long int ftell (FILE *__stream);
 651 /* Rewind to the beginning of STREAM.
 652
 653    This function is a possible cancellation point and therefore not
 654    marked with __THROW.  */
 655 extern void rewind (FILE *__stream);
 656 __END_NAMESPACE_STD
 657
 658 /* The Single Unix Specification, Version 2, specifies an alternative,
 659    more adequate interface for the two functions above which deal with
 660    file offset.  `long int' is not the right type.  These definitions
 661    are originally defined in the Large File Support API.  */
 662
 663 #if defined __USE_LARGEFILE || defined __USE_XOPEN2K
 664 # ifndef __USE_FILE_OFFSET64
 665 /* Seek to a certain position on STREAM.
 666
 667    This function is a possible cancellation point and therefore not
 668    marked with __THROW.  */
 669 extern int fseeko (FILE *__stream, __off_t __off, int __whence);
 670 /* Return the current position of STREAM.
 671
 672    This function is a possible cancellation point and therefore not
 673    marked with __THROW.  */
 674 extern __off_t ftello (FILE *__stream);
 675 # else
 676 #  ifdef __REDIRECT
 677 extern int __REDIRECT (fseeko,
 678                        (FILE *__stream, __off64_t __off, int __whence),
 679                        fseeko64);
 680 extern __off64_t __REDIRECT (ftello, (FILE *__stream), ftello64);
 681 #  else
 682 #   define fseeko fseeko64
 683 #   define ftello ftello64
 684 #  endif
 685 # endif
 686 #endif
 687
 688 __BEGIN_NAMESPACE_STD
 689 #ifndef __USE_FILE_OFFSET64
 690 /* Get STREAM's position.
 691
 692    This function is a possible cancellation point and therefore not
 693    marked with __THROW.  */
 694 extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos);
 695 /* Set STREAM's position.
 696
 697    This function is a possible cancellation point and therefore not
 698    marked with __THROW.  */
 699 extern int fsetpos (FILE *__stream, __const fpos_t *__pos);
 700 #else
 701 # ifdef __REDIRECT
 702 extern int __REDIRECT (fgetpos, (FILE *__restrict __stream,
 703                                  fpos_t *__restrict __pos), fgetpos64);
 704 extern int __REDIRECT (fsetpos,
 705                        (FILE *__stream, __const fpos_t *__pos), fsetpos64);
 706 # else
 707 #  define fgetpos fgetpos64
 708 #  define fsetpos fsetpos64
 709 # endif
 710 #endif
 711 __END_NAMESPACE_STD
 712
 713 #ifdef __USE_LARGEFILE64
 714 extern int fseeko64 (FILE *__stream, __off64_t __off, int __whence);
 715 extern __off64_t ftello64 (FILE *__stream);
 716 extern int fgetpos64 (FILE *__restrict __stream, fpos64_t *__restrict __pos);
 717 extern int fsetpos64 (FILE *__stream, __const fpos64_t *__pos);
 718 #endif
 719
 720 __BEGIN_NAMESPACE_STD
 721 /* Clear the error and EOF indicators for STREAM.  */
 722 extern void clearerr (FILE *__stream) __THROW;
 723 /* Return the EOF indicator for STREAM.  */
 724 extern int feof (FILE *__stream) __THROW;
 725 /* Return the error indicator for STREAM.  */
 726 extern int ferror (FILE *__stream) __THROW;
 727 __END_NAMESPACE_STD
 728
 729 #ifdef __USE_MISC
 730 /* Faster versions when locking is not required.  */
 731 extern void clearerr_unlocked (FILE *__stream) __THROW;
 732 extern int feof_unlocked (FILE *__stream) __THROW;
 733 extern int ferror_unlocked (FILE *__stream) __THROW;
 734 #endif
 735
 736
 737 __BEGIN_NAMESPACE_STD
 738 /* Print a message describing the meaning of the value of errno.
 739
 740    This function is a possible cancellation point and therefore not
 741    marked with __THROW.  */
 742 extern void perror (__const char *__s);
 743 __END_NAMESPACE_STD
 744
 745 /* Provide the declarations for `sys_errlist' and `sys_nerr' if they
 746    are available on this system.  Even if available, these variables
 747    should not be used directly.  The `strerror' function provides
 748    all the necessary functionality.  */
 749 #include <bits/sys_errlist.h>
 750
 751
 752 #ifdef  __USE_POSIX
 753 /* Return the system file descriptor for STREAM.  */
 754 extern int fileno (FILE *__stream) __THROW;
 755 #endif /* Use POSIX.  */
 756
 757 #ifdef __USE_MISC
 758 /* Faster version when locking is not required.  */
 759 extern int fileno_unlocked (FILE *__stream) __THROW;
 760 #endif
 761
 762
 763 #if (defined __USE_POSIX2 || defined __USE_SVID  || defined __USE_BSD || \
 764      defined __USE_MISC)
 765 /* Create a new stream connected to a pipe running the given command.
 766
 767    This function is a possible cancellation point and therefore not
 768    marked with __THROW.  */
 769 extern FILE *popen (__const char *__command, __const char *__modes);
 770
 771 /* Close a stream opened by popen and return the status of its child.
 772
 773    This function is a possible cancellation point and therefore not
 774    marked with __THROW.  */
 775 extern int pclose (FILE *__stream);
 776 #endif
 777
 778
 779 #ifdef  __USE_POSIX
 780 /* Return the name of the controlling terminal.  */
 781 extern char *ctermid (char *__s) __THROW;
 782 #endif /* Use POSIX.  */
 783
 784
 785 #ifdef __USE_XOPEN
 786 /* Return the name of the current user.  */
 787 extern char *cuserid (char *__s);
 788 #endif /* Use X/Open, but not issue 6.  */
 789
 790
 791 #ifdef  __USE_GNU
 792 struct obstack;                 /* See <obstack.h>.  */
 793
 794 /* Write formatted output to an obstack.  */
 795 extern int obstack_printf (struct obstack *__restrict __obstack,
 796                            __const char *__restrict __format, ...)
 797      __THROW __attribute__ ((__format__ (__printf__, 2, 3)));
 798 extern int obstack_vprintf (struct obstack *__restrict __obstack,
 799                             __const char *__restrict __format,
 800                             _G_va_list __args)
 801      __THROW __attribute__ ((__format__ (__printf__, 2, 0)));
 802 #endif /* Use GNU.  */
 803
 804
 805 #if defined __USE_POSIX || defined __USE_MISC
 806 /* These are defined in POSIX.1:1996.  */
 807
 808 /* Acquire ownership of STREAM.  */
 809 extern void flockfile (FILE *__stream) __THROW;
 810
 811 /* Try to acquire ownership of STREAM but do not block if it is not
 812    possible.  */
 813 extern int ftrylockfile (FILE *__stream) __THROW;
 814
 815 /* Relinquish the ownership granted for STREAM.  */
 816 extern void funlockfile (FILE *__stream) __THROW;
 817 #endif /* POSIX || misc */
 818
 819 #if defined __USE_XOPEN && !defined __USE_XOPEN2K && !defined __USE_GNU
 820 /* The X/Open standard requires some functions and variables to be
 821    declared here which do not belong into this header.  But we have to
 822    follow.  In GNU mode we don't do this nonsense.  */
 823 # define __need_getopt
 824 # include <getopt.h>
 825 #endif  /* X/Open, but not issue 6 and not for GNU.  */
 826
 827 /* If we are compiling with optimizing read this file.  It contains
 828    several optimizing inline functions and macros.  */
 829 #ifdef __USE_EXTERN_INLINES
 830 # include <bits/stdio.h>
 831 #endif
 832 #if __USE_FORTIFY_LEVEL > 0 && !defined __cplusplus
 833 # include <bits/stdio2.h>
 834 #endif
 835
 836 __END_DECLS
 837
 838 #endif /* <stdio.h> included.  */
 839
 840 #endif /* !_STDIO_H */