libio/stdio.h

   1 /* Define ISO C stdio on top of C++ iostreams.
   2    Copyright (C) 1991, 1994, 1995, 1996, 1997 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 # define __need___va_list
  36 # include <stdarg.h>
  37
  38 # include <bits/types.h>
  39 #endif /* Don't need FILE.  */
  40 #undef  __need_FILE
  41
  42
  43 #ifndef __FILE_defined
  44
  45 /* The opaque type of streams.  */
  46 typedef struct _IO_FILE FILE;
  47
  48 # define __FILE_defined 1
  49 #endif /* FILE not defined.  */
  50
  51
  52 #ifdef  _STDIO_H
  53 #define _STDIO_USES_IOSTREAM
  54
  55 #include <libio.h>
  56
  57 #ifdef __cplusplus
  58 # define __STDIO_INLINE inline
  59 #else
  60 # define __STDIO_INLINE extern __inline
  61 #endif
  62
  63 /* The type of the second argument to `fgetpos' and `fsetpos'.  */
  64 #ifndef __USE_FILE_OFFSET64
  65 typedef _G_fpos_t fpos_t;
  66 #else
  67 typedef _G_fpos64_t fpos_t;
  68 #endif
  69 #ifdef __USE_LARGEFILE64
  70 typedef _G_fpos64_t fpos64_t;
  71 #endif
  72
  73 /* Generate a unique file name (and possibly open it with mode "w+b").  */
  74 extern char *__stdio_gen_tempname __P ((char *__buf, size_t __bufsize,
  75                                         __const char *__dir,
  76                                         __const char *__pfx,
  77                                         int __dir_search,
  78                                         size_t *__lenptr,
  79                                         FILE **__streamptr,
  80                                         int __large_file));
  81
  82
  83 /* Print out MESSAGE on the error output and abort.  */
  84 extern void __libc_fatal __P ((__const char *__message))
  85      __attribute__ ((__noreturn__));
  86
  87
  88 /* The possibilities for the third argument to `setvbuf'.  */
  89 #define _IOFBF 0                /* Fully buffered.  */
  90 #define _IOLBF 1                /* Line buffered.  */
  91 #define _IONBF 2                /* No buffering.  */
  92
  93
  94 /* Default buffer size.  */
  95 #ifndef BUFSIZ
  96 # define BUFSIZ _IO_BUFSIZ
  97 #endif
  98
  99
 100 /* End of file character.
 101    Some things throughout the library rely on this being -1.  */
 102 #ifndef EOF
 103 # define EOF (-1)
 104 #endif
 105
 106
 107 /* The possibilities for the third argument to `fseek'.
 108    These values should not be changed.  */
 109 #define SEEK_SET        0       /* Seek from beginning of file.  */
 110 #define SEEK_CUR        1       /* Seek from current position.  */
 111 #define SEEK_END        2       /* Seek from end of file.  */
 112
 113
 114 #ifdef  __USE_SVID
 115 /* Default path prefix for `tempnam' and `tmpnam'.  */
 116 # define P_tmpdir       "/tmp"
 117 #endif
 118
 119
 120 /* Get the values:
 121    L_tmpnam     How long an array of chars must be to be passed to `tmpnam'.
 122    TMP_MAX      The minimum number of unique filenames generated by tmpnam
 123                 (and tempnam when it uses tmpnam's name space),
 124                 or tempnam (the two are separate).
 125    L_ctermid    How long an array to pass to `ctermid'.
 126    L_cuserid    How long an array to pass to `cuserid'.
 127    FOPEN_MAX    Minimum number of files that can be open at once.
 128    FILENAME_MAX Maximum length of a filename.  */
 129 #include <bits/stdio_lim.h>
 130
 131
 132 /* Standard streams.  */
 133 extern FILE *stdin;             /* Standard input stream.  */
 134 extern FILE *stdout;            /* Standard output stream.  */
 135 extern FILE *stderr;            /* Standard error output stream.  */
 136
 137
 138 /* Remove file FILENAME.  */
 139 extern int remove __P ((__const char *__filename));
 140 /* Rename file OLD to NEW.  */
 141 extern int rename __P ((__const char *__old, __const char *__new));
 142
 143
 144 /* Create a temporary file and open it read/write.  */
 145 #ifndef __USE_FILE_OFFSET64
 146 extern FILE *tmpfile __P ((void));
 147 #else
 148 extern FILE *tmpfile __P ((void)) __asm__ ("tmpfile64");
 149 #endif
 150 #ifdef __USE_LARGEFILE64
 151 extern FILE *tmpfile64 __P ((void));
 152 #endif
 153 /* Generate a temporary filename.  */
 154 extern char *tmpnam __P ((char *__s));
 155
 156 #ifdef __USE_MISC
 157 /* This is the reentrant variant of `tmpnam'.  The only difference is
 158    that it does not allow S to be NULL.  */
 159 extern char *tmpnam_r __P ((char *__s));
 160 #endif
 161
 162
 163 #if defined __USE_SVID || defined __USE_XOPEN
 164 /* Generate a unique temporary filename using up to five characters of PFX
 165    if it is not NULL.  The directory to put this file in is searched for
 166    as follows: First the environment variable "TMPDIR" is checked.
 167    If it contains the name of a writable directory, that directory is used.
 168    If not and if DIR is not NULL, that value is checked.  If that fails,
 169    P_tmpdir is tried and finally "/tmp".  The storage for the filename
 170    is allocated by `malloc'.  */
 171 extern char *tempnam __P ((__const char *__dir, __const char *__pfx));
 172 #endif
 173
 174
 175 /* Close STREAM.  */
 176 extern int fclose __P ((FILE *__stream));
 177 /* Flush STREAM, or all streams if STREAM is NULL.  */
 178 extern int fflush __P ((FILE *__stream));
 179
 180 #ifdef __USE_MISC
 181 /* Faster versions when locking is not required.  */
 182 extern int fclose_unlocked __P ((FILE *__stream));
 183 extern int fflush_unlocked __P ((FILE *__stream));
 184 #endif
 185
 186 #ifdef __USE_GNU
 187 /* Close all streams.  */
 188 extern int __fcloseall __P ((void));
 189 extern int fcloseall __P ((void));
 190 #endif
 191
 192
 193 /* Open a file and create a new stream for it.  */
 194 #ifndef __USE_FILE_OFFSET64
 195 extern FILE *fopen __P ((__const char *__restrict __filename,
 196                          __const char *__restrict __modes));
 197 #else
 198 extern FILE *fopen __P ((__const char *__restrict __filename,
 199                          __const char *__restrict __modes))
 200      __asm__ ("fopen64");
 201 #endif
 202 #ifdef __USE_LARGEFILE64
 203 extern FILE *fopen64 __P ((__const char *__restrict __filename,
 204                            __const char *__restrict __modes));
 205 #endif
 206 /* Open a file, replacing an existing stream with it. */
 207 #ifndef __USE_FILE_OFFSET64
 208 extern FILE *freopen __P ((__const char *__restrict __filename,
 209                            __const char *__restrict __modes,
 210                            FILE *__restrict __stream));
 211 #else
 212 extern FILE *freopen __P ((__const char *__restrict __filename,
 213                            __const char *__restrict __modes,
 214                            FILE *__restrict __stream)) __asm__ ("freopen64");
 215 #endif
 216 #ifdef __USE_LARGEFILE64
 217 extern FILE *freopen64 __P ((__const char *__restrict __filename,
 218                              __const char *__restrict __modes,
 219                              FILE *__restrict __stream));
 220 #endif
 221
 222 #ifdef  __USE_POSIX
 223 /* Create a new stream that refers to an existing system file descriptor.  */
 224 extern FILE *fdopen __P ((int __fd, __const char *__modes));
 225 #endif
 226
 227 #ifdef  __USE_GNU
 228 /* Create a new stream that refers to the given magic cookie,
 229    and uses the given functions for input and output.  */
 230 extern FILE *fopencookie __P ((void *__magic_cookie, __const char *__modes,
 231                                _IO_cookie_io_functions_t __io_funcs));
 232
 233 /* Open a stream that writes into a malloc'd buffer that is expanded as
 234    necessary.  *BUFLOC and *SIZELOC are updated with the buffer's location
 235    and the number of characters written on fflush or fclose.  */
 236 extern FILE *open_memstream __P ((char **__bufloc, size_t *__sizeloc));
 237 #endif
 238
 239
 240 /* If BUF is NULL, make STREAM unbuffered.
 241    Else make it use buffer BUF, of size BUFSIZ.  */
 242 extern void setbuf __P ((FILE *__restrict __stream, char *__restrict __buf));
 243 /* Make STREAM use buffering mode MODE.
 244    If BUF is not NULL, use N bytes of it for buffering;
 245    else allocate an internal buffer N bytes long.  */
 246 extern int setvbuf __P ((FILE *__restrict __stream, char *__restrict __buf,
 247                          int __modes, size_t __n));
 248
 249 #ifdef  __USE_BSD
 250 /* If BUF is NULL, make STREAM unbuffered.
 251    Else make it use SIZE bytes of BUF for buffering.  */
 252 extern void setbuffer __P ((FILE *__stream, char *__buf, size_t __size));
 253
 254 /* Make STREAM line-buffered.  */
 255 extern void setlinebuf __P ((FILE *__stream));
 256 #endif
 257
 258
 259 /* Write formatted output to STREAM.  */
 260 extern int fprintf __P ((FILE *__restrict __stream,
 261                          __const char *__restrict __format, ...));
 262 /* Write formatted output to stdout.  */
 263 extern int printf __P ((__const char *__restrict __format, ...));
 264 /* Write formatted output to S.  */
 265 extern int sprintf __P ((char *__restrict __s,
 266                          __const char *__restrict __format, ...));
 267
 268 /* Write formatted output to S from argument list ARG.  */
 269 extern int vfprintf __P ((FILE *__restrict __s,
 270                           __const char *__restrict __format,
 271                           _G_va_list __arg));
 272 /* Write formatted output to stdout from argument list ARG.  */
 273 extern int vprintf __P ((__const char *__restrict __format,
 274                          _G_va_list __arg));
 275 /* Write formatted output to S from argument list ARG.  */
 276 extern int vsprintf __P ((char *__restrict __s,
 277                           __const char *__restrict __format,
 278                           _G_va_list __arg));
 279
 280 #ifdef  __OPTIMIZE__
 281 __STDIO_INLINE int
 282 vprintf (__const char *__restrict __fmt, _G_va_list __arg)
 283 {
 284   return vfprintf (stdout, __fmt, __arg);
 285 }
 286 #endif /* Optimizing.  */
 287
 288 #if defined __USE_BSD || defined __USE_ISOC9X || defined __USE_UNIX98
 289 /* Maximum chars of output to write in MAXLEN.  */
 290 extern int __snprintf __P ((char *__restrict __s, size_t __maxlen,
 291                             __const char *__restrict __format, ...))
 292      __attribute__ ((__format__ (__printf__, 3, 4)));
 293 extern int snprintf __P ((char *__restrict __s, size_t __maxlen,
 294                           __const char *__restrict __format, ...))
 295      __attribute__ ((__format__ (__printf__, 3, 4)));
 296
 297 extern int __vsnprintf __P ((char *__restrict __s, size_t __maxlen,
 298                              __const char *__restrict __format,
 299                              _G_va_list __arg))
 300      __attribute__ ((__format__ (__printf__, 3, 0)));
 301 extern int vsnprintf __P ((char *__restrict __s, size_t __maxlen,
 302                            __const char *__restrict __format,
 303                            _G_va_list __arg))
 304      __attribute__ ((__format__ (__printf__, 3, 0)));
 305 #endif
 306
 307 #ifdef __USE_GNU
 308 /* Write formatted output to a string dynamically allocated with `malloc'.
 309    Store the address of the string in *PTR.  */
 310 extern int vasprintf __P ((char **__restrict __ptr,
 311                            __const char *__restrict __f, _G_va_list __arg))
 312      __attribute__ ((__format__ (__printf__, 2, 0)));
 313 extern int asprintf __P ((char **__restrict __ptr,
 314                           __const char *__restrict __fmt, ...))
 315      __attribute__ ((__format__ (__printf__, 2, 3)));
 316
 317 /* Write formatted output to a file descriptor.  */
 318 extern int vdprintf __P ((int __fd, __const char *__restrict __fmt,
 319                           _G_va_list __arg))
 320      __attribute__ ((__format__ (__printf__, 2, 0)));
 321 extern int dprintf __P ((int __fd, __const char *__restrict __fmt, ...))
 322      __attribute__ ((__format__ (__printf__, 2, 3)));
 323 #endif
 324
 325
 326 /* Read formatted input from STREAM.  */
 327 extern int fscanf __P ((FILE *__restrict __stream,
 328                         __const char *__restrict __format, ...));
 329 /* Read formatted input from stdin.  */
 330 extern int scanf __P ((__const char *__restrict __format, ...));
 331 /* Read formatted input from S.  */
 332 extern int sscanf __P ((__const char *__restrict __s,
 333                         __const char *__restrict __format, ...));
 334
 335 #ifdef  __USE_GNU
 336 /* Read formatted input from S into argument list ARG.  */
 337 extern int __vfscanf __P ((FILE *__restrict __s,
 338                            __const char *__restrict __format,
 339                            _G_va_list __arg))
 340      __attribute__ ((__format__ (__scanf__, 2, 0)));
 341 extern int vfscanf __P ((FILE *__restrict __s,
 342                          __const char *__restrict __format,
 343                          _G_va_list __arg))
 344      __attribute__ ((__format__ (__scanf__, 2, 0)));
 345
 346 /* Read formatted input from stdin into argument list ARG.  */
 347 extern int __vscanf __P ((__const char *__restrict __format,
 348                           _G_va_list __arg))
 349      __attribute__ ((__format__ (__scanf__, 1, 0)));
 350 extern int vscanf __P ((__const char *__restrict __format, _G_va_list __arg))
 351      __attribute__ ((__format__ (__scanf__, 1, 0)));
 352
 353 /* Read formatted input from S into argument list ARG.  */
 354 extern int __vsscanf __P ((__const char *__restrict __s,
 355                            __const char *__restrict __format,
 356                            _G_va_list __arg))
 357      __attribute__ ((__format__ (__scanf__, 2, 0)));
 358 extern int vsscanf __P ((__const char *__restrict __s,
 359                          __const char *__restrict __format,
 360                          _G_va_list __arg))
 361      __attribute__ ((__format__ (__scanf__, 2, 0)));
 362 #endif /* Use GNU.  */
 363
 364
 365 /* Read a character from STREAM.  */
 366 extern int fgetc __P ((FILE *__stream));
 367 extern int getc __P ((FILE *__stream));
 368
 369 /* Read a character from stdin.  */
 370 extern int getchar __P ((void));
 371
 372 /* The C standard explicitly says this is a macro, so we always do the
 373    optimization for it.  */
 374 #define getc(_fp) _IO_getc (_fp)
 375
 376 #ifdef  __OPTIMIZE__
 377 __STDIO_INLINE int
 378 getchar (void)
 379 {
 380   return _IO_getc (stdin);
 381 }
 382 #endif /* Optimizing.  */
 383
 384 #if defined __USE_POSIX || defined __USE_MISC
 385 /* These are defined in POSIX.1:1996.  */
 386 extern int getc_unlocked __P ((FILE *__stream));
 387 extern int getchar_unlocked __P ((void));
 388
 389 # ifdef __OPTIMIZE__
 390 __STDIO_INLINE int
 391 getc_unlocked (FILE *__fp)
 392 {
 393   return _IO_getc_unlocked (__fp);
 394 }
 395
 396 __STDIO_INLINE int
 397 getchar_unlocked (void)
 398 {
 399   return _IO_getc_unlocked (stdin);
 400 }
 401 # endif /* Optimizing.  */
 402 #endif /* Use POSIX or MISC.  */
 403
 404
 405 /* Write a character to STREAM.  */
 406 extern int fputc __P ((int __c, FILE *__stream));
 407 extern int putc __P ((int __c, FILE *__stream));
 408
 409 /* Write a character to stdout.  */
 410 extern int putchar __P ((int __c));
 411
 412 /* The C standard explicitly says this can be a macro,
 413    so we always do the optimization for it.  */
 414 #define putc(_ch, _fp) _IO_putc (_ch, _fp)
 415
 416 #ifdef __OPTIMIZE__
 417 __STDIO_INLINE int
 418 putchar (int __c)
 419 {
 420   return _IO_putc (__c, stdout);
 421 }
 422 #endif
 423
 424 #ifdef __USE_MISC
 425 /* Faster version when locking is not necessary.  */
 426 extern int fputc_unlocked __P ((int __c, FILE *__stream));
 427
 428 # ifdef __OPTIMIZE__
 429 __STDIO_INLINE int
 430 fputc_unlocked (int __c, FILE *__stream)
 431 {
 432   return _IO_putc_unlocked (__c, __stream);
 433 }
 434 # endif /* Optimizing.  */
 435 #endif /* Use MISC.  */
 436
 437 #if defined __USE_POSIX || defined __USE_MISC
 438 /* These are defined in POSIX.1:1996.  */
 439 extern int putc_unlocked __P ((int __c, FILE *__stream));
 440 extern int putchar_unlocked __P ((int __c));
 441
 442 # ifdef __OPTIMIZE__
 443 __STDIO_INLINE int
 444 putc_unlocked (int __c, FILE *__stream)
 445 {
 446   return _IO_putc_unlocked (__c, __stream);
 447 }
 448
 449 __STDIO_INLINE int
 450 putchar_unlocked (int __c)
 451 {
 452   return _IO_putc_unlocked (__c, stdout);
 453 }
 454 # endif /* Optimizing.  */
 455 #endif /* Use POSIX or MISc.  */
 456
 457
 458 #if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
 459 /* Get a word (int) from STREAM.  */
 460 extern int getw __P ((FILE *__stream));
 461
 462 /* Write a word (int) to STREAM.  */
 463 extern int putw __P ((int __w, FILE *__stream));
 464 #endif
 465
 466
 467 /* Get a newline-terminated string of finite length from STREAM.  */
 468 extern char *fgets __P ((char *__restrict __s, int __n,
 469                          FILE *__restrict __stream));
 470
 471 /* Get a newline-terminated string from stdin, removing the newline.
 472    DO NOT USE THIS FUNCTION!!  There is no limit on how much it will read.  */
 473 extern char *gets __P ((char *__s));
 474
 475
 476 #ifdef  __USE_GNU
 477 /* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
 478    (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
 479    NULL), pointing to *N characters of space.  It is realloc'd as
 480    necessary.  Returns the number of characters read (not including the
 481    null terminator), or -1 on error or EOF.  */
 482 _IO_ssize_t __getdelim __P ((char **__lineptr, size_t *__n,
 483                              int __delimiter, FILE *__stream));
 484 _IO_ssize_t getdelim __P ((char **__lineptr, size_t *__n,
 485                            int __delimiter, FILE *__stream));
 486
 487 /* Like `getdelim', but reads up to a newline.  */
 488 _IO_ssize_t __getline __P ((char **__lineptr, size_t *__n, FILE *__stream));
 489 _IO_ssize_t getline __P ((char **__lineptr, size_t *__n, FILE *__stream));
 490
 491 # ifdef __OPTIMIZE__
 492 __STDIO_INLINE _IO_ssize_t
 493 getline (char **__lineptr, size_t *__n, FILE *__stream)
 494 {
 495   return __getdelim (__lineptr, __n, '\n', __stream);
 496 }
 497 # endif /* Optimizing.  */
 498 #endif
 499
 500
 501 /* Write a string to STREAM.  */
 502 extern int fputs __P ((__const char *__restrict __s,
 503                        FILE *__restrict __stream));
 504 /* Write a string, followed by a newline, to stdout.  */
 505 extern int puts __P ((__const char *__s));
 506
 507
 508 /* Push a character back onto the input buffer of STREAM.  */
 509 extern int ungetc __P ((int __c, FILE *__stream));
 510
 511
 512 /* Read chunks of generic data from STREAM.  */
 513 extern size_t fread __P ((void *__restrict __ptr, size_t __size,
 514                           size_t __n, FILE *__restrict __stream));
 515 /* Write chunks of generic data to STREAM.  */
 516 extern size_t fwrite __P ((__const void *__restrict __ptr, size_t __size,
 517                            size_t __n, FILE *__restrict __s));
 518
 519 #ifdef __USE_MISC
 520 /* Faster versions when locking is not necessary.  */
 521 extern size_t fread_unlocked __P ((void *__restrict __ptr, size_t __size,
 522                                    size_t __n, FILE *__restrict __stream));
 523 extern size_t fwrite_unlocked __P ((__const void *__restrict __ptr,
 524                                     size_t __size, size_t __n,
 525                                     FILE *__restrict __stream));
 526 #endif
 527
 528
 529 /* Seek to a certain position on STREAM.  */
 530 extern int fseek __P ((FILE *__stream, long int __off, int __whence));
 531 /* Return the current position of STREAM.  */
 532 extern long int ftell __P ((FILE *__stream));
 533 /* Rewind to the beginning of STREAM.  */
 534 extern void rewind __P ((FILE *__stream));
 535
 536 #if (defined __USE_LARGEFILE || defined __USE_LARGEFILE64 \
 537      || defined __USE_FILE_OFFSET64)
 538 /* The Single Unix Specification, Version 2, specifies an alternative,
 539    more adequate interface for the two functions above which deal with
 540    file offset.  `long int' is not the right type.  These definitions
 541    are originally defined in the Large File Support API.  */
 542
 543 /* Types needed in these functions.  */
 544 # ifndef off_t
 545 #  ifndef __USE_FILE_OFFSET64
 546 typedef __off_t off_t;
 547 #  else
 548 typedef __off64_t off_t;
 549 #  endif
 550 #  define off_t off_t
 551 # endif
 552
 553 # if defined __USE_LARGEFILE64 && !defined off64_t
 554 typedef __off64_t off64_t;
 555 #  define off64_t off64_t
 556 # endif
 557
 558 /* Seek to a certain position on STREAM.  */
 559 # ifndef __USE_FILE_OFFSET64
 560 extern int fseeko __P ((FILE *__stream, __off_t __off, int __whence));
 561 # else
 562 extern int fseeko __P ((FILE *__stream, __off_t __off, int __whence))
 563      __asm__ ("fseeko64");
 564 # endif
 565 # ifdef __USE_LARGEFILE64
 566 extern int fseeko64 __P ((FILE *__stream, __off64_t __off, int __whence));
 567 # endif
 568
 569 /* Return the current position of STREAM.  */
 570 # ifndef __USE_FILE_OFFSET64
 571 extern __off_t ftello __P ((FILE *__stream));
 572 # else
 573 extern __off_t ftello __P ((FILE *__stream)) __asm__ ("ftello");
 574 # endif
 575 # ifdef __USE_LARGEFILE64
 576 extern __off64_t ftello64 __P ((FILE *__stream));
 577 # endif
 578 #endif
 579
 580 /* Get STREAM's position.  */
 581 #ifndef __USE_FILE_OFFSET64
 582 extern int fgetpos __P ((FILE *__restrict __stream,
 583                          fpos_t *__restrict __pos));
 584 #else
 585 extern int fgetpos __P ((FILE *__restrict __stream,
 586                          fpos_t *__restrict __pos)) __asm__ ("fgetpos64");
 587 #endif
 588 #ifdef __USE_LARGEFILE64
 589 extern int fgetpos64 __P ((FILE *__restrict __stream,
 590                            fpos64_t *__restrict __pos));
 591 #endif
 592 /* Set STREAM's position.  */
 593 #ifndef __USE_FILE_OFFSET64
 594 extern int fsetpos __P ((FILE *__stream, __const fpos_t *__pos));
 595 #else
 596 extern int fsetpos __P ((FILE *__stream, __const fpos_t *__pos))
 597      __asm__ ("fsetpos64");
 598 #endif
 599 #ifdef __USE_LARGEFILE64
 600 extern int fsetpos64 __P ((FILE *__stream, __const fpos64_t *__pos));
 601 #endif
 602
 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 */