libio/stdio.h

   1 /* Define ISO C stdio on top of C++ iostreams.
   2    Copyright (C) 1991,1994-2004, 2005 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, ...) __wur;
 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, ...) __wur;
 402 /* Read formatted input from S.  */
 403 extern int sscanf (__const char *__restrict __s,
 404                    __const char *__restrict __format, ...) __THROW __wur;
 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))) __wur;
 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))) __wur;
 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))) __wur;
 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      __wur;
 530
 531 /* Get a newline-terminated string from stdin, removing the newline.
 532    DO NOT USE THIS FUNCTION!!  There is no limit on how much it will read.
 533
 534    This function is a possible cancellation point and therefore not
 535    marked with __THROW.  */
 536 extern char *gets (char *__s) __wur;
 537 __END_NAMESPACE_STD
 538
 539 #ifdef __USE_GNU
 540 /* This function does the same as `fgets' but does not lock the stream.
 541
 542    This function is not part of POSIX and therefore no official
 543    cancellation point.  But due to similarity with an POSIX interface
 544    or due to the implementation it is a cancellation point and
 545    therefore not marked with __THROW.  */
 546 extern char *fgets_unlocked (char *__restrict __s, int __n,
 547                              FILE *__restrict __stream) __wur;
 548 #endif
 549
 550
 551 #ifdef  __USE_GNU
 552 /* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
 553    (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
 554    NULL), pointing to *N characters of space.  It is realloc'd as
 555    necessary.  Returns the number of characters read (not including the
 556    null terminator), or -1 on error or EOF.
 557
 558    These functions are not part of POSIX and therefore no official
 559    cancellation point.  But due to similarity with an POSIX interface
 560    or due to the implementation they are cancellation points and
 561    therefore not marked with __THROW.  */
 562 extern _IO_ssize_t __getdelim (char **__restrict __lineptr,
 563                                size_t *__restrict __n, int __delimiter,
 564                                FILE *__restrict __stream) __wur;
 565 extern _IO_ssize_t getdelim (char **__restrict __lineptr,
 566                              size_t *__restrict __n, int __delimiter,
 567                              FILE *__restrict __stream) __wur;
 568
 569 /* Like `getdelim', but reads up to a newline.
 570
 571    This function is not part of POSIX and therefore no official
 572    cancellation point.  But due to similarity with an POSIX interface
 573    or due to the implementation it is a cancellation point and
 574    therefore not marked with __THROW.  */
 575 extern _IO_ssize_t getline (char **__restrict __lineptr,
 576                             size_t *__restrict __n,
 577                             FILE *__restrict __stream) __wur;
 578 #endif
 579
 580
 581 __BEGIN_NAMESPACE_STD
 582 /* Write a string to STREAM.
 583
 584    This function is a possible cancellation points and therefore not
 585    marked with __THROW.  */
 586 extern int fputs (__const char *__restrict __s, FILE *__restrict __stream);
 587
 588 /* Write a string, followed by a newline, to stdout.
 589
 590    This function is a possible cancellation points and therefore not
 591    marked with __THROW.  */
 592 extern int puts (__const char *__s);
 593
 594
 595 /* Push a character back onto the input buffer of STREAM.
 596
 597    This function is a possible cancellation points and therefore not
 598    marked with __THROW.  */
 599 extern int ungetc (int __c, FILE *__stream) __wur;
 600
 601
 602 /* Read chunks of generic data from STREAM.
 603
 604    This function is a possible cancellation points and therefore not
 605    marked with __THROW.  */
 606 extern size_t fread (void *__restrict __ptr, size_t __size,
 607                      size_t __n, FILE *__restrict __stream) __wur;
 608 /* Write chunks of generic data to STREAM.
 609
 610    This function is a possible cancellation points and therefore not
 611    marked with __THROW.  */
 612 extern size_t fwrite (__const void *__restrict __ptr, size_t __size,
 613                       size_t __n, FILE *__restrict __s) __wur;
 614 __END_NAMESPACE_STD
 615
 616 #ifdef __USE_GNU
 617 /* This function does the same as `fputs' but does not lock the stream.
 618
 619    This function is not part of POSIX and therefore no official
 620    cancellation point.  But due to similarity with an POSIX interface
 621    or due to the implementation it is a cancellation point and
 622    therefore not marked with __THROW.  */
 623 extern int fputs_unlocked (__const char *__restrict __s,
 624                            FILE *__restrict __stream);
 625 #endif
 626
 627 #ifdef __USE_MISC
 628 /* Faster versions when locking is not necessary.
 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 size_t fread_unlocked (void *__restrict __ptr, size_t __size,
 635                               size_t __n, FILE *__restrict __stream) __wur;
 636 extern size_t fwrite_unlocked (__const void *__restrict __ptr, size_t __size,
 637                                size_t __n, FILE *__restrict __stream) __wur;
 638 #endif
 639
 640
 641 __BEGIN_NAMESPACE_STD
 642 /* Seek to a certain position on STREAM.
 643
 644    This function is a possible cancellation point and therefore not
 645    marked with __THROW.  */
 646 extern int fseek (FILE *__stream, long int __off, int __whence);
 647 /* Return the current position of STREAM.
 648
 649    This function is a possible cancellation point and therefore not
 650    marked with __THROW.  */
 651 extern long int ftell (FILE *__stream) __wur;
 652 /* Rewind to the beginning of STREAM.
 653
 654    This function is a possible cancellation point and therefore not
 655    marked with __THROW.  */
 656 extern void rewind (FILE *__stream);
 657 __END_NAMESPACE_STD
 658
 659 /* The Single Unix Specification, Version 2, specifies an alternative,
 660    more adequate interface for the two functions above which deal with
 661    file offset.  `long int' is not the right type.  These definitions
 662    are originally defined in the Large File Support API.  */
 663
 664 #if defined __USE_LARGEFILE || defined __USE_XOPEN2K
 665 # ifndef __USE_FILE_OFFSET64
 666 /* Seek to a certain position on STREAM.
 667
 668    This function is a possible cancellation point and therefore not
 669    marked with __THROW.  */
 670 extern int fseeko (FILE *__stream, __off_t __off, int __whence);
 671 /* Return the current position of STREAM.
 672
 673    This function is a possible cancellation point and therefore not
 674    marked with __THROW.  */
 675 extern __off_t ftello (FILE *__stream) __wur;
 676 # else
 677 #  ifdef __REDIRECT
 678 extern int __REDIRECT (fseeko,
 679                        (FILE *__stream, __off64_t __off, int __whence),
 680                        fseeko64);
 681 extern __off64_t __REDIRECT (ftello, (FILE *__stream), ftello64);
 682 #  else
 683 #   define fseeko fseeko64
 684 #   define ftello ftello64
 685 #  endif
 686 # endif
 687 #endif
 688
 689 __BEGIN_NAMESPACE_STD
 690 #ifndef __USE_FILE_OFFSET64
 691 /* Get STREAM's position.
 692
 693    This function is a possible cancellation point and therefore not
 694    marked with __THROW.  */
 695 extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos);
 696 /* Set STREAM's position.
 697
 698    This function is a possible cancellation point and therefore not
 699    marked with __THROW.  */
 700 extern int fsetpos (FILE *__stream, __const fpos_t *__pos);
 701 #else
 702 # ifdef __REDIRECT
 703 extern int __REDIRECT (fgetpos, (FILE *__restrict __stream,
 704                                  fpos_t *__restrict __pos), fgetpos64);
 705 extern int __REDIRECT (fsetpos,
 706                        (FILE *__stream, __const fpos_t *__pos), fsetpos64);
 707 # else
 708 #  define fgetpos fgetpos64
 709 #  define fsetpos fsetpos64
 710 # endif
 711 #endif
 712 __END_NAMESPACE_STD
 713
 714 #ifdef __USE_LARGEFILE64
 715 extern int fseeko64 (FILE *__stream, __off64_t __off, int __whence);
 716 extern __off64_t ftello64 (FILE *__stream) __wur;
 717 extern int fgetpos64 (FILE *__restrict __stream, fpos64_t *__restrict __pos);
 718 extern int fsetpos64 (FILE *__stream, __const fpos64_t *__pos);
 719 #endif
 720
 721 __BEGIN_NAMESPACE_STD
 722 /* Clear the error and EOF indicators for STREAM.  */
 723 extern void clearerr (FILE *__stream) __THROW;
 724 /* Return the EOF indicator for STREAM.  */
 725 extern int feof (FILE *__stream) __THROW;
 726 /* Return the error indicator for STREAM.  */
 727 extern int ferror (FILE *__stream) __THROW;
 728 __END_NAMESPACE_STD
 729
 730 #ifdef __USE_MISC
 731 /* Faster versions when locking is not required.  */
 732 extern void clearerr_unlocked (FILE *__stream) __THROW;
 733 extern int feof_unlocked (FILE *__stream) __THROW;
 734 extern int ferror_unlocked (FILE *__stream) __THROW;
 735 #endif
 736
 737
 738 __BEGIN_NAMESPACE_STD
 739 /* Print a message describing the meaning of the value of errno.
 740
 741    This function is a possible cancellation point and therefore not
 742    marked with __THROW.  */
 743 extern void perror (__const char *__s);
 744 __END_NAMESPACE_STD
 745
 746 /* Provide the declarations for `sys_errlist' and `sys_nerr' if they
 747    are available on this system.  Even if available, these variables
 748    should not be used directly.  The `strerror' function provides
 749    all the necessary functionality.  */
 750 #include <bits/sys_errlist.h>
 751
 752
 753 #ifdef  __USE_POSIX
 754 /* Return the system file descriptor for STREAM.  */
 755 extern int fileno (FILE *__stream) __THROW;
 756 #endif /* Use POSIX.  */
 757
 758 #ifdef __USE_MISC
 759 /* Faster version when locking is not required.  */
 760 extern int fileno_unlocked (FILE *__stream) __THROW;
 761 #endif
 762
 763
 764 #if (defined __USE_POSIX2 || defined __USE_SVID  || defined __USE_BSD || \
 765      defined __USE_MISC)
 766 /* Create a new stream connected to a pipe running the given command.
 767
 768    This function is a possible cancellation point and therefore not
 769    marked with __THROW.  */
 770 extern FILE *popen (__const char *__command, __const char *__modes);
 771
 772 /* Close a stream opened by popen and return the status of its child.
 773
 774    This function is a possible cancellation point and therefore not
 775    marked with __THROW.  */
 776 extern int pclose (FILE *__stream);
 777 #endif
 778
 779
 780 #ifdef  __USE_POSIX
 781 /* Return the name of the controlling terminal.  */
 782 extern char *ctermid (char *__s) __THROW;
 783 #endif /* Use POSIX.  */
 784
 785
 786 #ifdef __USE_XOPEN
 787 /* Return the name of the current user.  */
 788 extern char *cuserid (char *__s);
 789 #endif /* Use X/Open, but not issue 6.  */
 790
 791
 792 #ifdef  __USE_GNU
 793 struct obstack;                 /* See <obstack.h>.  */
 794
 795 /* Write formatted output to an obstack.  */
 796 extern int obstack_printf (struct obstack *__restrict __obstack,
 797                            __const char *__restrict __format, ...)
 798      __THROW __attribute__ ((__format__ (__printf__, 2, 3)));
 799 extern int obstack_vprintf (struct obstack *__restrict __obstack,
 800                             __const char *__restrict __format,
 801                             _G_va_list __args)
 802      __THROW __attribute__ ((__format__ (__printf__, 2, 0)));
 803 #endif /* Use GNU.  */
 804
 805
 806 #if defined __USE_POSIX || defined __USE_MISC
 807 /* These are defined in POSIX.1:1996.  */
 808
 809 /* Acquire ownership of STREAM.  */
 810 extern void flockfile (FILE *__stream) __THROW;
 811
 812 /* Try to acquire ownership of STREAM but do not block if it is not
 813    possible.  */
 814 extern int ftrylockfile (FILE *__stream) __THROW __wur;
 815
 816 /* Relinquish the ownership granted for STREAM.  */
 817 extern void funlockfile (FILE *__stream) __THROW;
 818 #endif /* POSIX || misc */
 819
 820 #if defined __USE_XOPEN && !defined __USE_XOPEN2K && !defined __USE_GNU
 821 /* The X/Open standard requires some functions and variables to be
 822    declared here which do not belong into this header.  But we have to
 823    follow.  In GNU mode we don't do this nonsense.  */
 824 # define __need_getopt
 825 # include <getopt.h>
 826 #endif  /* X/Open, but not issue 6 and not for GNU.  */
 827
 828 /* If we are compiling with optimizing read this file.  It contains
 829    several optimizing inline functions and macros.  */
 830 #ifdef __USE_EXTERN_INLINES
 831 # include <bits/stdio.h>
 832 #endif
 833 #if __USE_FORTIFY_LEVEL > 0 && !defined __cplusplus
 834 # include <bits/stdio2.h>
 835 #endif
 836
 837 __END_DECLS
 838
 839 #endif /* <stdio.h> included.  */
 840
 841 #endif /* !_STDIO_H */