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