libio/stdio.h

   1 /* Define ISO C stdio on top of C++ iostreams.
   2    Copyright (C) 1991, 94, 95, 96, 97, 98 Free Software Foundation, Inc.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 /*
  20  *      ISO C Standard: 4.9 INPUT/OUTPUT        <stdio.h>
  21  */
  22
  23 #ifndef _STDIO_H
  24
  25 #ifndef __need_FILE
  26 # define _STDIO_H       1
  27 # include <features.h>
  28
  29 __BEGIN_DECLS
  30
  31 # define __need_size_t
  32 # define __need_NULL
  33 # include <stddef.h>
  34
  35 # ifndef __USE_XOPEN
  36 #  define __need___va_list
  37 # endif
  38 # include <stdarg.h>
  39
  40 # include <bits/types.h>
  41 #endif /* Don't need FILE.  */
  42 #undef  __need_FILE
  43
  44
  45 #ifndef __FILE_defined
  46
  47 /* The opaque type of streams.  */
  48 typedef struct _IO_FILE FILE;
  49
  50 # define __FILE_defined 1
  51 #endif /* FILE not defined.  */
  52
  53
  54 #ifdef  _STDIO_H
  55 #define _STDIO_USES_IOSTREAM
  56
  57 #include <libio.h>
  58
  59 #ifdef __cplusplus
  60 # define __STDIO_INLINE inline
  61 #else
  62 # define __STDIO_INLINE extern __inline
  63 #endif
  64
  65 /* The type of the second argument to `fgetpos' and `fsetpos'.  */
  66 #ifndef __USE_FILE_OFFSET64
  67 typedef _G_fpos_t fpos_t;
  68 #else
  69 typedef _G_fpos64_t fpos_t;
  70 #endif
  71 #ifdef __USE_LARGEFILE64
  72 typedef _G_fpos64_t fpos64_t;
  73 #endif
  74
  75 /* Generate a unique file name (and possibly open it).  */
  76 extern int __path_search __P ((char *__tmpl, size_t __tmpl_len,
  77                                __const char *__dir,
  78                                __const char *__pfx));
  79
  80 extern int __gen_tempname __P ((char *__tmpl, int __openit, int __large_file));
  81
  82 /* Print out MESSAGE on the error output and abort.  */
  83 extern void __libc_fatal __P ((__const char *__message))
  84      __attribute__ ((__noreturn__));
  85
  86
  87 /* The possibilities for the third argument to `setvbuf'.  */
  88 #define _IOFBF 0                /* Fully buffered.  */
  89 #define _IOLBF 1                /* Line buffered.  */
  90 #define _IONBF 2                /* No buffering.  */
  91
  92
  93 /* Default buffer size.  */
  94 #ifndef BUFSIZ
  95 # define BUFSIZ _IO_BUFSIZ
  96 #endif
  97
  98
  99 /* End of file character.
 100    Some things throughout the library rely on this being -1.  */
 101 #ifndef EOF
 102 # define EOF (-1)
 103 #endif
 104
 105
 106 /* The possibilities for the third argument to `fseek'.
 107    These values should not be changed.  */
 108 #define SEEK_SET        0       /* Seek from beginning of file.  */
 109 #define SEEK_CUR        1       /* Seek from current position.  */
 110 #define SEEK_END        2       /* Seek from end of file.  */
 111
 112
 113 #if defined __USE_SVID || defined __USE_XOPEN
 114 /* Default path prefix for `tempnam' and `tmpnam'.  */
 115 # define P_tmpdir       "/tmp"
 116 #endif
 117
 118
 119 /* Get the values:
 120    L_tmpnam     How long an array of chars must be to be passed to `tmpnam'.
 121    TMP_MAX      The minimum number of unique filenames generated by tmpnam
 122                 (and tempnam when it uses tmpnam's name space),
 123                 or tempnam (the two are separate).
 124    L_ctermid    How long an array to pass to `ctermid'.
 125    L_cuserid    How long an array to pass to `cuserid'.
 126    FOPEN_MAX    Minimum number of files that can be open at once.
 127    FILENAME_MAX Maximum length of a filename.  */
 128 #include <bits/stdio_lim.h>
 129
 130
 131 /* Standard streams.  */
 132 extern FILE *stdin;             /* Standard input stream.  */
 133 extern FILE *stdout;            /* Standard output stream.  */
 134 extern FILE *stderr;            /* Standard error output stream.  */
 135
 136
 137 /* Remove file FILENAME.  */
 138 extern int remove __P ((__const char *__filename));
 139 /* Rename file OLD to NEW.  */
 140 extern int rename __P ((__const char *__old, __const char *__new));
 141
 142
 143 /* Create a temporary file and open it read/write.  */
 144 #ifndef __USE_FILE_OFFSET64
 145 extern FILE *tmpfile __P ((void));
 146 #else
 147 # ifdef __REDIRECT
 148 extern FILE *__REDIRECT (tmpfile, __P ((void)), tmpfile64);
 149 # else
 150 #  define tmpfile tmpfile64
 151 # endif
 152 #endif
 153 #ifdef __USE_LARGEFILE64
 154 extern FILE *tmpfile64 __P ((void));
 155 #endif
 156 /* Generate a temporary filename.  */
 157 extern char *tmpnam __P ((char *__s));
 158
 159 #ifdef __USE_MISC
 160 /* This is the reentrant variant of `tmpnam'.  The only difference is
 161    that it does not allow S to be NULL.  */
 162 extern char *tmpnam_r __P ((char *__s));
 163 #endif
 164
 165
 166 #if defined __USE_SVID || defined __USE_XOPEN
 167 /* Generate a unique temporary filename using up to five characters of PFX
 168    if it is not NULL.  The directory to put this file in is searched for
 169    as follows: First the environment variable "TMPDIR" is checked.
 170    If it contains the name of a writable directory, that directory is used.
 171    If not and if DIR is not NULL, that value is checked.  If that fails,
 172    P_tmpdir is tried and finally "/tmp".  The storage for the filename
 173    is allocated by `malloc'.  */
 174 extern char *tempnam __P ((__const char *__dir, __const char *__pfx));
 175 #endif
 176
 177
 178 /* Close STREAM.  */
 179 extern int fclose __P ((FILE *__stream));
 180 /* Flush STREAM, or all streams if STREAM is NULL.  */
 181 extern int fflush __P ((FILE *__stream));
 182
 183 #ifdef __USE_MISC
 184 /* Faster versions when locking is not required.  */
 185 extern int fflush_unlocked __P ((FILE *__stream));
 186 #endif
 187
 188 #ifdef __USE_GNU
 189 /* Close all streams.  */
 190 extern int fcloseall __P ((void));
 191 #endif
 192
 193
 194 #ifndef __USE_FILE_OFFSET64
 195 /* Open a file and create a new stream for it.  */
 196 extern FILE *fopen __P ((__const char *__restrict __filename,
 197                          __const char *__restrict __modes));
 198 /* Open a file, replacing an existing stream with it. */
 199 extern FILE *freopen __P ((__const char *__restrict __filename,
 200                            __const char *__restrict __modes,
 201                            FILE *__restrict __stream));
 202 #else
 203 # ifdef __REDIRECT
 204 extern FILE *__REDIRECT (fopen, __P ((__const char *__restrict __filename,
 205                                    __const char *__restrict __modes)),
 206                          fopen64);
 207 extern FILE *__REDIRECT (freopen, __P ((__const char *__restrict __filename,
 208                                         __const char *__restrict __modes,
 209                                         FILE *__restrict __stream)),
 210                          freopen64);
 211 # else
 212 #  define fopen fopen64
 213 #  define freopen freopen64
 214 # endif
 215 #endif
 216 #ifdef __USE_LARGEFILE64
 217 extern FILE *fopen64 __P ((__const char *__restrict __filename,
 218                            __const char *__restrict __modes));
 219 extern FILE *freopen64 __P ((__const char *__restrict __filename,
 220                              __const char *__restrict __modes,
 221                              FILE *__restrict __stream));
 222 #endif
 223
 224 #ifdef  __USE_POSIX
 225 /* Create a new stream that refers to an existing system file descriptor.  */
 226 extern FILE *fdopen __P ((int __fd, __const char *__modes));
 227 #endif
 228
 229 #ifdef  __USE_GNU
 230 /* Create a new stream that refers to the given magic cookie,
 231    and uses the given functions for input and output.  */
 232 extern FILE *fopencookie __P ((void *__magic_cookie, __const char *__modes,
 233                                _IO_cookie_io_functions_t __io_funcs));
 234
 235 /* Open a stream that writes into a malloc'd buffer that is expanded as
 236    necessary.  *BUFLOC and *SIZELOC are updated with the buffer's location
 237    and the number of characters written on fflush or fclose.  */
 238 extern FILE *open_memstream __P ((char **__bufloc, size_t *__sizeloc));
 239 #endif
 240
 241
 242 /* If BUF is NULL, make STREAM unbuffered.
 243    Else make it use buffer BUF, of size BUFSIZ.  */
 244 extern void setbuf __P ((FILE *__restrict __stream, char *__restrict __buf));
 245 /* Make STREAM use buffering mode MODE.
 246    If BUF is not NULL, use N bytes of it for buffering;
 247    else allocate an internal buffer N bytes long.  */
 248 extern int setvbuf __P ((FILE *__restrict __stream, char *__restrict __buf,
 249                          int __modes, size_t __n));
 250
 251 #ifdef  __USE_BSD
 252 /* If BUF is NULL, make STREAM unbuffered.
 253    Else make it use SIZE bytes of BUF for buffering.  */
 254 extern void setbuffer __P ((FILE *__stream, char *__buf, size_t __size));
 255
 256 /* Make STREAM line-buffered.  */
 257 extern void setlinebuf __P ((FILE *__stream));
 258 #endif
 259
 260
 261 /* Write formatted output to STREAM.  */
 262 extern int fprintf __P ((FILE *__restrict __stream,
 263                          __const char *__restrict __format, ...));
 264 /* Write formatted output to stdout.  */
 265 extern int printf __P ((__const char *__restrict __format, ...));
 266 /* Write formatted output to S.  */
 267 extern int sprintf __P ((char *__restrict __s,
 268                          __const char *__restrict __format, ...));
 269
 270 /* Write formatted output to S from argument list ARG.  */
 271 extern int vfprintf __P ((FILE *__restrict __s,
 272                           __const char *__restrict __format,
 273                           _G_va_list __arg));
 274 /* Write formatted output to stdout from argument list ARG.  */
 275 extern int vprintf __P ((__const char *__restrict __format,
 276                          _G_va_list __arg));
 277 /* Write formatted output to S from argument list ARG.  */
 278 extern int vsprintf __P ((char *__restrict __s,
 279                           __const char *__restrict __format,
 280                           _G_va_list __arg));
 281
 282 #if defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__
 283 __STDIO_INLINE int
 284 vprintf (__const char *__restrict __fmt, _G_va_list __arg)
 285 {
 286   return vfprintf (stdout, __fmt, __arg);
 287 }
 288 #endif /* Optimizing.  */
 289
 290 #if defined __USE_BSD || defined __USE_ISOC9X || defined __USE_UNIX98
 291 /* Maximum chars of output to write in MAXLEN.  */
 292 extern int snprintf __P ((char *__restrict __s, size_t __maxlen,
 293                           __const char *__restrict __format, ...))
 294      __attribute__ ((__format__ (__printf__, 3, 4)));
 295
 296 extern int __vsnprintf __P ((char *__restrict __s, size_t __maxlen,
 297                              __const char *__restrict __format,
 298                              _G_va_list __arg))
 299      __attribute__ ((__format__ (__printf__, 3, 0)));
 300 extern int vsnprintf __P ((char *__restrict __s, size_t __maxlen,
 301                            __const char *__restrict __format,
 302                            _G_va_list __arg))
 303      __attribute__ ((__format__ (__printf__, 3, 0)));
 304 #endif
 305
 306 #ifdef __USE_GNU
 307 /* Write formatted output to a string dynamically allocated with `malloc'.
 308    Store the address of the string in *PTR.  */
 309 extern int vasprintf __P ((char **__restrict __ptr,
 310                            __const char *__restrict __f, _G_va_list __arg))
 311      __attribute__ ((__format__ (__printf__, 2, 0)));
 312 extern int __asprintf __P ((char **__restrict __ptr,
 313                             __const char *__restrict __fmt, ...))
 314      __attribute__ ((__format__ (__printf__, 2, 3)));
 315 extern int asprintf __P ((char **__restrict __ptr,
 316                           __const char *__restrict __fmt, ...))
 317      __attribute__ ((__format__ (__printf__, 2, 3)));
 318
 319 /* Write formatted output to a file descriptor.  */
 320 extern int vdprintf __P ((int __fd, __const char *__restrict __fmt,
 321                           _G_va_list __arg))
 322      __attribute__ ((__format__ (__printf__, 2, 0)));
 323 extern int dprintf __P ((int __fd, __const char *__restrict __fmt, ...))
 324      __attribute__ ((__format__ (__printf__, 2, 3)));
 325 #endif
 326
 327
 328 /* Read formatted input from STREAM.  */
 329 extern int fscanf __P ((FILE *__restrict __stream,
 330                         __const char *__restrict __format, ...));
 331 /* Read formatted input from stdin.  */
 332 extern int scanf __P ((__const char *__restrict __format, ...));
 333 /* Read formatted input from S.  */
 334 extern int sscanf __P ((__const char *__restrict __s,
 335                         __const char *__restrict __format, ...));
 336
 337 #ifdef  __USE_GNU
 338 /* Read formatted input from S into argument list ARG.  */
 339 extern int vfscanf __P ((FILE *__restrict __s,
 340                          __const char *__restrict __format,
 341                          _G_va_list __arg))
 342      __attribute__ ((__format__ (__scanf__, 2, 0)));
 343
 344 /* Read formatted input from stdin into argument list ARG.  */
 345 extern int vscanf __P ((__const char *__restrict __format, _G_va_list __arg))
 346      __attribute__ ((__format__ (__scanf__, 1, 0)));
 347
 348 /* Read formatted input from S into argument list ARG.  */
 349 extern int __vsscanf __P ((__const char *__restrict __s,
 350                            __const char *__restrict __format,
 351                            _G_va_list __arg))
 352      __attribute__ ((__format__ (__scanf__, 2, 0)));
 353 extern int vsscanf __P ((__const char *__restrict __s,
 354                          __const char *__restrict __format,
 355                          _G_va_list __arg))
 356      __attribute__ ((__format__ (__scanf__, 2, 0)));
 357 #endif /* Use GNU.  */
 358
 359
 360 /* Read a character from STREAM.  */
 361 extern int fgetc __P ((FILE *__stream));
 362 extern int getc __P ((FILE *__stream));
 363
 364 /* Read a character from stdin.  */
 365 extern int getchar __P ((void));
 366
 367 /* The C standard explicitly says this is a macro, so we always do the
 368    optimization for it.  */
 369 #define getc(_fp) _IO_getc (_fp)
 370
 371 #if defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__
 372 __STDIO_INLINE int
 373 getchar (void)
 374 {
 375   return _IO_getc (stdin);
 376 }
 377 #endif /* Optimizing.  */
 378
 379 #if defined __USE_POSIX || defined __USE_MISC
 380 /* These are defined in POSIX.1:1996.  */
 381 extern int getc_unlocked __P ((FILE *__stream));
 382 extern int getchar_unlocked __P ((void));
 383
 384 # ifdef __OPTIMIZE__
 385 __STDIO_INLINE int
 386 getc_unlocked (FILE *__fp)
 387 {
 388   return _IO_getc_unlocked (__fp);
 389 }
 390
 391 __STDIO_INLINE int
 392 getchar_unlocked (void)
 393 {
 394   return _IO_getc_unlocked (stdin);
 395 }
 396 # endif /* Optimizing.  */
 397 #endif /* Use POSIX or MISC.  */
 398
 399
 400 /* Write a character to STREAM.  */
 401 extern int fputc __P ((int __c, FILE *__stream));
 402 extern int putc __P ((int __c, FILE *__stream));
 403
 404 /* Write a character to stdout.  */
 405 extern int putchar __P ((int __c));
 406
 407 /* The C standard explicitly says this can be a macro,
 408    so we always do the optimization for it.  */
 409 #define putc(_ch, _fp) _IO_putc (_ch, _fp)
 410
 411 #if defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__
 412 __STDIO_INLINE int
 413 putchar (int __c)
 414 {
 415   return _IO_putc (__c, stdout);
 416 }
 417 #endif
 418
 419 #ifdef __USE_MISC
 420 /* Faster version when locking is not necessary.  */
 421 extern int fputc_unlocked __P ((int __c, FILE *__stream));
 422
 423 # ifdef __OPTIMIZE__
 424 __STDIO_INLINE int
 425 fputc_unlocked (int __c, FILE *__stream)
 426 {
 427   return _IO_putc_unlocked (__c, __stream);
 428 }
 429 # endif /* Optimizing.  */
 430 #endif /* Use MISC.  */
 431
 432 #if defined __USE_POSIX || defined __USE_MISC
 433 /* These are defined in POSIX.1:1996.  */
 434 extern int putc_unlocked __P ((int __c, FILE *__stream));
 435 extern int putchar_unlocked __P ((int __c));
 436
 437 # ifdef __OPTIMIZE__
 438 __STDIO_INLINE int
 439 putc_unlocked (int __c, FILE *__stream)
 440 {
 441   return _IO_putc_unlocked (__c, __stream);
 442 }
 443
 444 __STDIO_INLINE int
 445 putchar_unlocked (int __c)
 446 {
 447   return _IO_putc_unlocked (__c, stdout);
 448 }
 449 # endif /* Optimizing.  */
 450 #endif /* Use POSIX or MISC.  */
 451
 452
 453 #if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
 454 /* Get a word (int) from STREAM.  */
 455 extern int getw __P ((FILE *__stream));
 456
 457 /* Write a word (int) to STREAM.  */
 458 extern int putw __P ((int __w, FILE *__stream));
 459 #endif
 460
 461
 462 /* Get a newline-terminated string of finite length from STREAM.  */
 463 extern char *fgets __P ((char *__restrict __s, int __n,
 464                          FILE *__restrict __stream));
 465
 466 #ifdef __USE_GNU
 467 /* This function does the same as `fgets' but does not lock the stream.  */
 468 extern char *fgets_unlocked __P ((char *__restrict __s, int __n,
 469                                   FILE *__restrict __stream));
 470 #endif
 471
 472 /* Get a newline-terminated string from stdin, removing the newline.
 473    DO NOT USE THIS FUNCTION!!  There is no limit on how much it will read.  */
 474 extern char *gets __P ((char *__s));
 475
 476
 477 #ifdef  __USE_GNU
 478 /* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
 479    (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
 480    NULL), pointing to *N characters of space.  It is realloc'd as
 481    necessary.  Returns the number of characters read (not including the
 482    null terminator), or -1 on error or EOF.  */
 483 extern _IO_ssize_t __getdelim __P ((char **__lineptr, size_t *__n,
 484                                     int __delimiter, FILE *__stream));
 485 extern _IO_ssize_t getdelim __P ((char **__lineptr, size_t *__n,
 486                                   int __delimiter, FILE *__stream));
 487
 488 /* Like `getdelim', but reads up to a newline.  */
 489 extern _IO_ssize_t getline __P ((char **__lineptr, size_t *__n,
 490                                  FILE *__stream));
 491
 492 # if defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__
 493 __STDIO_INLINE _IO_ssize_t
 494 getline (char **__lineptr, size_t *__n, FILE *__stream)
 495 {
 496   return __getdelim (__lineptr, __n, '\n', __stream);
 497 }
 498 # endif /* Optimizing.  */
 499 #endif
 500
 501
 502 /* Write a string to STREAM.  */
 503 extern int fputs __P ((__const char *__restrict __s,
 504                        FILE *__restrict __stream));
 505
 506 #ifdef __USE_GNU
 507 /* This function does the same as `fputs' but does not lock the stream.  */
 508 extern int fputs_unlocked __P ((__const char *__restrict __s,
 509                                 FILE *__restrict __stream));
 510 #endif
 511
 512 /* Write a string, followed by a newline, to stdout.  */
 513 extern int puts __P ((__const char *__s));
 514
 515
 516 /* Push a character back onto the input buffer of STREAM.  */
 517 extern int ungetc __P ((int __c, FILE *__stream));
 518
 519
 520 /* Read chunks of generic data from STREAM.  */
 521 extern size_t fread __P ((void *__restrict __ptr, size_t __size,
 522                           size_t __n, FILE *__restrict __stream));
 523 /* Write chunks of generic data to STREAM.  */
 524 extern size_t fwrite __P ((__const void *__restrict __ptr, size_t __size,
 525                            size_t __n, FILE *__restrict __s));
 526
 527 #ifdef __USE_MISC
 528 /* Faster versions when locking is not necessary.  */
 529 extern size_t fread_unlocked __P ((void *__restrict __ptr, size_t __size,
 530                                    size_t __n, FILE *__restrict __stream));
 531 extern size_t fwrite_unlocked __P ((__const void *__restrict __ptr,
 532                                     size_t __size, size_t __n,
 533                                     FILE *__restrict __stream));
 534 #endif
 535
 536
 537 /* Seek to a certain position on STREAM.  */
 538 extern int fseek __P ((FILE *__stream, long int __off, int __whence));
 539 /* Return the current position of STREAM.  */
 540 extern long int ftell __P ((FILE *__stream));
 541 /* Rewind to the beginning of STREAM.  */
 542 extern void rewind __P ((FILE *__stream));
 543
 544 #if (defined __USE_LARGEFILE || defined __USE_LARGEFILE64 \
 545      || defined __USE_FILE_OFFSET64)
 546 /* The Single Unix Specification, Version 2, specifies an alternative,
 547    more adequate interface for the two functions above which deal with
 548    file offset.  `long int' is not the right type.  These definitions
 549    are originally defined in the Large File Support API.  */
 550
 551 /* Types needed in these functions.  */
 552 # ifndef off_t
 553 #  ifndef __USE_FILE_OFFSET64
 554 typedef __off_t off_t;
 555 #  else
 556 typedef __off64_t off_t;
 557 #  endif
 558 #  define off_t off_t
 559 # endif
 560
 561 # if defined __USE_LARGEFILE64 && !defined off64_t
 562 typedef __off64_t off64_t;
 563 #  define off64_t off64_t
 564 # endif
 565
 566
 567 # ifndef __USE_FILE_OFFSET64
 568 /* Seek to a certain position on STREAM.  */
 569 extern int fseeko __P ((FILE *__stream, __off_t __off, int __whence));
 570 /* Return the current position of STREAM.  */
 571 extern __off_t ftello __P ((FILE *__stream));
 572 /* Get STREAM's position.  */
 573 extern int fgetpos __P ((FILE *__restrict __stream,
 574                          fpos_t *__restrict __pos));
 575 /* Set STREAM's position.  */
 576 extern int fsetpos __P ((FILE *__stream, __const fpos_t *__pos));
 577 # else
 578 # ifdef __REDIRECT
 579 extern int __REDIRECT (fseeko,
 580                        __P ((FILE *__stream, __off64_t __off, int __whence)),
 581                        fseeko64);
 582 extern __off64_t __REDIRECT (ftello, __P ((FILE *__stream)), ftello64);
 583 extern int __REDIRECT (fgetpos, __P ((FILE *__restrict __stream,
 584                                       fpos_t *__restrict __pos)), fgetpos64);
 585 extern int __REDIRECT (fsetpos, __P ((FILE *__stream, __const fpos_t *__pos)),
 586                        fsetpos64);
 587 #  else
 588 #   define fseeko fseeko64
 589 #   define ftello ftello64
 590 #   define fgetpos fgetpos64
 591 #   define fsetpos fsetpos64
 592 #  endif
 593 # endif
 594
 595 # ifdef __USE_LARGEFILE64
 596 extern int fseeko64 __P ((FILE *__stream, __off64_t __off, int __whence));
 597 extern __off64_t ftello64 __P ((FILE *__stream));
 598 extern int fgetpos64 __P ((FILE *__restrict __stream,
 599                            fpos64_t *__restrict __pos));
 600 extern int fsetpos64 __P ((FILE *__stream, __const fpos64_t *__pos));
 601 # endif
 602 #endif
 603
 604 /* Clear the error and EOF indicators for STREAM.  */
 605 extern void clearerr __P ((FILE *__stream));
 606 /* Return the EOF indicator for STREAM.  */
 607 extern int feof __P ((FILE *__stream));
 608 /* Return the error indicator for STREAM.  */
 609 extern int ferror __P ((FILE *__stream));
 610
 611 #ifdef __USE_MISC
 612 /* Faster versions when locking is not required.  */
 613 extern void clearerr_unlocked __P ((FILE *__stream));
 614 extern int feof_unlocked __P ((FILE *__stream));
 615 extern int ferror_unlocked __P ((FILE *__stream));
 616
 617 # ifdef __OPTIMIZE__
 618 __STDIO_INLINE int
 619 feof_unlocked (FILE *__stream)
 620 {
 621   return _IO_feof_unlocked (__stream);
 622 }
 623
 624 __STDIO_INLINE int
 625 ferror_unlocked (FILE *__stream)
 626 {
 627   return _IO_ferror_unlocked (__stream);
 628 }
 629 # endif /* Optimizing.  */
 630 #endif
 631
 632
 633 /* Print a message describing the meaning of the value of errno.  */
 634 extern void perror __P ((__const char *__s));
 635
 636 /* These variables normally should not be used directly.  The `strerror'
 637    function provides all the needed functionality.  */
 638 #ifdef  __USE_BSD
 639 extern int sys_nerr;
 640 extern __const char *__const sys_errlist[];
 641 #endif
 642 #ifdef  __USE_GNU
 643 extern int _sys_nerr;
 644 extern __const char *__const _sys_errlist[];
 645 #endif
 646
 647
 648 #ifdef  __USE_POSIX
 649 /* Return the system file descriptor for STREAM.  */
 650 extern int fileno __P ((FILE *__stream));
 651 #endif /* Use POSIX.  */
 652
 653 #ifdef __USE_MISC
 654 /* Faster version when locking is not required.  */
 655 extern int fileno_unlocked __P ((FILE *__stream));
 656 #endif
 657
 658
 659 #if (defined __USE_POSIX2 || defined __USE_SVID  || defined __USE_BSD || \
 660      defined __USE_MISC)
 661 /* Create a new stream connected to a pipe running the given command.  */
 662 extern FILE *popen __P ((__const char *__command, __const char *__modes));
 663
 664 /* Close a stream opened by popen and return the status of its child.  */
 665 extern int pclose __P ((FILE *__stream));
 666 #endif
 667
 668
 669 #ifdef  __USE_POSIX
 670 /* Return the name of the controlling terminal.  */
 671 extern char *ctermid __P ((char *__s));
 672 #endif /* Use POSIX.  */
 673
 674
 675 #ifdef __USE_XOPEN
 676 /* Return the name of the current user.  */
 677 extern char *cuserid __P ((char *__s));
 678 #endif /* Use X/Open.  */
 679
 680
 681 #ifdef  __USE_GNU
 682 struct obstack;                 /* See <obstack.h>.  */
 683
 684 /* Write formatted output to an obstack.  */
 685 extern int obstack_printf __P ((struct obstack *__obstack,
 686                                 __const char *__format, ...));
 687 extern int obstack_vprintf __P ((struct obstack *__obstack,
 688                                  __const char *__format,
 689                                  _G_va_list __args));
 690 #endif /* Use GNU.  */
 691
 692
 693 #if defined __USE_POSIX || defined __USE_MISC
 694 /* These are defined in POSIX.1:1996.  */
 695
 696 /* Acquire ownership of STREAM.  */
 697 extern void flockfile __P ((FILE *__stream));
 698
 699 /* Try to acquire ownership of STREAM but do not block if it is not
 700    possible.  */
 701 extern int ftrylockfile __P ((FILE *__stream));
 702
 703 /* Relinquish the ownership granted for STREAM.  */
 704 extern void funlockfile __P ((FILE *__stream));
 705 #endif /* POSIX || misc */
 706
 707 #if defined __USE_XOPEN && !defined __USE_GNU
 708 /* The X/Open standard requires some functions and variables to be
 709    declared here which do not belong into this header.  But we have to
 710    follow.  In GNU mode we don't do this nonsense.  */
 711
 712 /* For more information on these symbols look in <getopt.h>.  */
 713 extern char *optarg;
 714 extern int optind;
 715 extern int opterr;
 716 extern int optopt;
 717
 718 extern int getopt __P ((int __argc, char *__const *__argv,
 719                         __const char *__shortopts));
 720 #endif
 721
 722 __END_DECLS
 723
 724 /* Define helper macro.  */
 725 #undef __STDIO_INLINE
 726
 727 #endif /* <stdio.h> included.  */
 728
 729 #endif /* !_STDIO_H */