1/* Define ISO C stdio on top of C++ iostreams.
2 Copyright (C) 1991-2021 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, see
17 <https://www.gnu.org/licenses/>. */
18
19/*
20 * ISO C99 Standard: 7.19 Input/output <stdio.h>
21 */
22
23#ifndef _STDIO_H
24#define _STDIO_H 1
25
26#define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
27#include <bits/libc-header-start.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#include <bits/types/__fpos_t.h>
40#include <bits/types/__fpos64_t.h>
41#include <bits/types/__FILE.h>
42#include <bits/types/FILE.h>
43#include <bits/types/struct_FILE.h>
44
45#ifdef __USE_GNU
46# include <bits/types/cookie_io_functions_t.h>
47#endif
48
49#if defined __USE_XOPEN || defined __USE_XOPEN2K8
50# ifdef __GNUC__
51# ifndef _VA_LIST_DEFINED
52typedef __gnuc_va_list va_list;
53# define _VA_LIST_DEFINED
54# endif
55# else
56# include <stdarg.h>
57# endif
58#endif
59
60#if defined __USE_UNIX98 || defined __USE_XOPEN2K
61# ifndef __off_t_defined
62# ifndef __USE_FILE_OFFSET64
63typedef __off_t off_t;
64# else
65typedef __off64_t off_t;
66# endif
67# define __off_t_defined
68# endif
69# if defined __USE_LARGEFILE64 && !defined __off64_t_defined
70typedef __off64_t off64_t;
71# define __off64_t_defined
72# endif
73#endif
74
75#ifdef __USE_XOPEN2K8
76# ifndef __ssize_t_defined
77typedef __ssize_t ssize_t;
78# define __ssize_t_defined
79# endif
80#endif
81
82/* The type of the second argument to `fgetpos' and `fsetpos'. */
83#ifndef __USE_FILE_OFFSET64
84typedef __fpos_t fpos_t;
85#else
86typedef __fpos64_t fpos_t;
87#endif
88#ifdef __USE_LARGEFILE64
89typedef __fpos64_t fpos64_t;
90#endif
91
92/* The possibilities for the third argument to `setvbuf'. */
93#define _IOFBF 0 /* Fully buffered. */
94#define _IOLBF 1 /* Line buffered. */
95#define _IONBF 2 /* No buffering. */
96
97
98/* Default buffer size. */
99#define BUFSIZ 8192
100
101
102/* The value returned by fgetc and similar functions to indicate the
103 end of the file. */
104#define EOF (-1)
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#ifdef __USE_GNU
113# define SEEK_DATA 3 /* Seek to next data. */
114# define SEEK_HOLE 4 /* Seek to next hole. */
115#endif
116
117
118#if defined __USE_MISC || defined __USE_XOPEN
119/* Default path prefix for `tempnam' and `tmpnam'. */
120# define P_tmpdir "/tmp"
121#endif
122
123
124/* Get the values:
125 L_tmpnam How long an array of chars must be to be passed to `tmpnam'.
126 TMP_MAX The minimum number of unique filenames generated by tmpnam
127 (and tempnam when it uses tmpnam's name space),
128 or tempnam (the two are separate).
129 L_ctermid How long an array to pass to `ctermid'.
130 L_cuserid How long an array to pass to `cuserid'.
131 FOPEN_MAX Minimum number of files that can be open at once.
132 FILENAME_MAX Maximum length of a filename. */
133#include <bits/stdio_lim.h>
134
135
136/* Standard streams. */
137extern FILE *stdin; /* Standard input stream. */
138extern FILE *stdout; /* Standard output stream. */
139extern FILE *stderr; /* Standard error output stream. */
140/* C89/C99 say they're macros. Make them happy. */
141#define stdin stdin
142#define stdout stdout
143#define stderr stderr
144
145/* Remove file FILENAME. */
146extern int remove (const char *__filename) __THROW;
147/* Rename file OLD to NEW. */
148extern int rename (const char *__old, const char *__new) __THROW;
149
150#ifdef __USE_ATFILE
151/* Rename file OLD relative to OLDFD to NEW relative to NEWFD. */
152extern int renameat (int __oldfd, const char *__old, int __newfd,
153 const char *__new) __THROW;
154#endif
155
156#ifdef __USE_GNU
157/* Flags for renameat2. */
158# define RENAME_NOREPLACE (1 << 0)
159# define RENAME_EXCHANGE (1 << 1)
160# define RENAME_WHITEOUT (1 << 2)
161
162/* Rename file OLD relative to OLDFD to NEW relative to NEWFD, with
163 additional flags. */
164extern int renameat2 (int __oldfd, const char *__old, int __newfd,
165 const char *__new, unsigned int __flags) __THROW;
166#endif
167
168/* Create a temporary file and open it read/write.
169
170 This function is a possible cancellation point and therefore not
171 marked with __THROW. */
172#ifndef __USE_FILE_OFFSET64
173extern FILE *tmpfile (void) __wur;
174#else
175# ifdef __REDIRECT
176extern FILE *__REDIRECT (tmpfile, (void), tmpfile64) __wur;
177# else
178# define tmpfile tmpfile64
179# endif
180#endif
181
182#ifdef __USE_LARGEFILE64
183extern FILE *tmpfile64 (void) __wur;
184#endif
185
186/* Generate a temporary filename. */
187extern char *tmpnam (char *__s) __THROW __wur;
188
189#ifdef __USE_MISC
190/* This is the reentrant variant of `tmpnam'. The only difference is
191 that it does not allow S to be NULL. */
192extern char *tmpnam_r (char *__s) __THROW __wur;
193#endif
194
195
196#if defined __USE_MISC || defined __USE_XOPEN
197/* Generate a unique temporary filename using up to five characters of PFX
198 if it is not NULL. The directory to put this file in is searched for
199 as follows: First the environment variable "TMPDIR" is checked.
200 If it contains the name of a writable directory, that directory is used.
201 If not and if DIR is not NULL, that value is checked. If that fails,
202 P_tmpdir is tried and finally "/tmp". The storage for the filename
203 is allocated by `malloc'. */
204extern char *tempnam (const char *__dir, const char *__pfx)
205 __THROW __attribute_malloc__ __wur;
206#endif
207
208
209/* Close STREAM.
210
211 This function is a possible cancellation point and therefore not
212 marked with __THROW. */
213extern int fclose (FILE *__stream);
214/* Flush STREAM, or all streams if STREAM is NULL.
215
216 This function is a possible cancellation point and therefore not
217 marked with __THROW. */
218extern int fflush (FILE *__stream);
219
220#ifdef __USE_MISC
221/* Faster versions when locking is not required.
222
223 This function is not part of POSIX and therefore no official
224 cancellation point. But due to similarity with an POSIX interface
225 or due to the implementation it is a cancellation point and
226 therefore not marked with __THROW. */
227extern int fflush_unlocked (FILE *__stream);
228#endif
229
230#ifdef __USE_GNU
231/* Close all streams.
232
233 This function is not part of POSIX and therefore no official
234 cancellation point. But due to similarity with an POSIX interface
235 or due to the implementation it is a cancellation point and
236 therefore not marked with __THROW. */
237extern int fcloseall (void);
238#endif
239
240
241#ifndef __USE_FILE_OFFSET64
242/* Open a file and create a new stream for it.
243
244 This function is a possible cancellation point and therefore not
245 marked with __THROW. */
246extern FILE *fopen (const char *__restrict __filename,
247 const char *__restrict __modes) __wur;
248/* Open a file, replacing an existing stream with it.
249
250 This function is a possible cancellation point and therefore not
251 marked with __THROW. */
252extern FILE *freopen (const char *__restrict __filename,
253 const char *__restrict __modes,
254 FILE *__restrict __stream) __wur;
255#else
256# ifdef __REDIRECT
257extern FILE *__REDIRECT (fopen, (const char *__restrict __filename,
258 const char *__restrict __modes), fopen64)
259 __wur;
260extern FILE *__REDIRECT (freopen, (const char *__restrict __filename,
261 const char *__restrict __modes,
262 FILE *__restrict __stream), freopen64)
263 __wur;
264# else
265# define fopen fopen64
266# define freopen freopen64
267# endif
268#endif
269#ifdef __USE_LARGEFILE64
270extern FILE *fopen64 (const char *__restrict __filename,
271 const char *__restrict __modes) __wur;
272extern FILE *freopen64 (const char *__restrict __filename,
273 const char *__restrict __modes,
274 FILE *__restrict __stream) __wur;
275#endif
276
277#ifdef __USE_POSIX
278/* Create a new stream that refers to an existing system file descriptor. */
279extern FILE *fdopen (int __fd, const char *__modes) __THROW __wur;
280#endif
281
282#ifdef __USE_GNU
283/* Create a new stream that refers to the given magic cookie,
284 and uses the given functions for input and output. */
285extern FILE *fopencookie (void *__restrict __magic_cookie,
286 const char *__restrict __modes,
287 cookie_io_functions_t __io_funcs) __THROW __wur;
288#endif
289
290#if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2)
291/* Create a new stream that refers to a memory buffer. */
292extern FILE *fmemopen (void *__s, size_t __len, const char *__modes)
293 __THROW __wur;
294
295/* Open a stream that writes into a malloc'd buffer that is expanded as
296 necessary. *BUFLOC and *SIZELOC are updated with the buffer's location
297 and the number of characters written on fflush or fclose. */
298extern FILE *open_memstream (char **__bufloc, size_t *__sizeloc) __THROW __wur;
299#endif
300
301
302/* If BUF is NULL, make STREAM unbuffered.
303 Else make it use buffer BUF, of size BUFSIZ. */
304extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __THROW;
305/* Make STREAM use buffering mode MODE.
306 If BUF is not NULL, use N bytes of it for buffering;
307 else allocate an internal buffer N bytes long. */
308extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf,
309 int __modes, size_t __n) __THROW;
310
311#ifdef __USE_MISC
312/* If BUF is NULL, make STREAM unbuffered.
313 Else make it use SIZE bytes of BUF for buffering. */
314extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf,
315 size_t __size) __THROW;
316
317/* Make STREAM line-buffered. */
318extern void setlinebuf (FILE *__stream) __THROW;
319#endif
320
321
322/* Write formatted output to STREAM.
323
324 This function is a possible cancellation point and therefore not
325 marked with __THROW. */
326extern int fprintf (FILE *__restrict __stream,
327 const char *__restrict __format, ...);
328/* Write formatted output to stdout.
329
330 This function is a possible cancellation point and therefore not
331 marked with __THROW. */
332extern int printf (const char *__restrict __format, ...);
333/* Write formatted output to S. */
334extern int sprintf (char *__restrict __s,
335 const char *__restrict __format, ...) __THROWNL;
336
337/* Write formatted output to S from argument list ARG.
338
339 This function is a possible cancellation point and therefore not
340 marked with __THROW. */
341extern int vfprintf (FILE *__restrict __s, const char *__restrict __format,
342 __gnuc_va_list __arg);
343/* Write formatted output to stdout from argument list ARG.
344
345 This function is a possible cancellation point and therefore not
346 marked with __THROW. */
347extern int vprintf (const char *__restrict __format, __gnuc_va_list __arg);
348/* Write formatted output to S from argument list ARG. */
349extern int vsprintf (char *__restrict __s, const char *__restrict __format,
350 __gnuc_va_list __arg) __THROWNL;
351
352#if defined __USE_ISOC99 || defined __USE_UNIX98
353/* Maximum chars of output to write in MAXLEN. */
354extern int snprintf (char *__restrict __s, size_t __maxlen,
355 const char *__restrict __format, ...)
356 __THROWNL __attribute__ ((__format__ (__printf__, 3, 4)));
357
358extern int vsnprintf (char *__restrict __s, size_t __maxlen,
359 const char *__restrict __format, __gnuc_va_list __arg)
360 __THROWNL __attribute__ ((__format__ (__printf__, 3, 0)));
361#endif
362
363#if __GLIBC_USE (LIB_EXT2)
364/* Write formatted output to a string dynamically allocated with `malloc'.
365 Store the address of the string in *PTR. */
366extern int vasprintf (char **__restrict __ptr, const char *__restrict __f,
367 __gnuc_va_list __arg)
368 __THROWNL __attribute__ ((__format__ (__printf__, 2, 0))) __wur;
369extern int __asprintf (char **__restrict __ptr,
370 const char *__restrict __fmt, ...)
371 __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur;
372extern int asprintf (char **__restrict __ptr,
373 const char *__restrict __fmt, ...)
374 __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur;
375#endif
376
377#ifdef __USE_XOPEN2K8
378/* Write formatted output to a file descriptor. */
379extern int vdprintf (int __fd, const char *__restrict __fmt,
380 __gnuc_va_list __arg)
381 __attribute__ ((__format__ (__printf__, 2, 0)));
382extern int dprintf (int __fd, const char *__restrict __fmt, ...)
383 __attribute__ ((__format__ (__printf__, 2, 3)));
384#endif
385
386
387/* Read formatted input from STREAM.
388
389 This function is a possible cancellation point and therefore not
390 marked with __THROW. */
391extern int fscanf (FILE *__restrict __stream,
392 const char *__restrict __format, ...) __wur;
393/* Read formatted input from stdin.
394
395 This function is a possible cancellation point and therefore not
396 marked with __THROW. */
397extern int scanf (const char *__restrict __format, ...) __wur;
398/* Read formatted input from S. */
399extern int sscanf (const char *__restrict __s,
400 const char *__restrict __format, ...) __THROW;
401
402/* For historical reasons, the C99-compliant versions of the scanf
403 functions are at alternative names. When __LDBL_COMPAT or
404 __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI are in effect, this is handled in
405 bits/stdio-ldbl.h. */
406#include <bits/floatn.h>
407#if !__GLIBC_USE (DEPRECATED_SCANF) && !defined __LDBL_COMPAT \
408 && __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 0
409# ifdef __REDIRECT
410extern int __REDIRECT (fscanf, (FILE *__restrict __stream,
411 const char *__restrict __format, ...),
412 __isoc99_fscanf) __wur;
413extern int __REDIRECT (scanf, (const char *__restrict __format, ...),
414 __isoc99_scanf) __wur;
415extern int __REDIRECT_NTH (sscanf, (const char *__restrict __s,
416 const char *__restrict __format, ...),
417 __isoc99_sscanf);
418# else
419extern int __isoc99_fscanf (FILE *__restrict __stream,
420 const char *__restrict __format, ...) __wur;
421extern int __isoc99_scanf (const char *__restrict __format, ...) __wur;
422extern int __isoc99_sscanf (const char *__restrict __s,
423 const char *__restrict __format, ...) __THROW;
424# define fscanf __isoc99_fscanf
425# define scanf __isoc99_scanf
426# define sscanf __isoc99_sscanf
427# endif
428#endif
429
430#ifdef __USE_ISOC99
431/* Read formatted input from S into argument list ARG.
432
433 This function is a possible cancellation point and therefore not
434 marked with __THROW. */
435extern int vfscanf (FILE *__restrict __s, const char *__restrict __format,
436 __gnuc_va_list __arg)
437 __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
438
439/* Read formatted input from stdin into argument list ARG.
440
441 This function is a possible cancellation point and therefore not
442 marked with __THROW. */
443extern int vscanf (const char *__restrict __format, __gnuc_va_list __arg)
444 __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
445
446/* Read formatted input from S into argument list ARG. */
447extern int vsscanf (const char *__restrict __s,
448 const char *__restrict __format, __gnuc_va_list __arg)
449 __THROW __attribute__ ((__format__ (__scanf__, 2, 0)));
450
451/* Same redirection as above for the v*scanf family. */
452# if !__GLIBC_USE (DEPRECATED_SCANF)
453# if defined __REDIRECT && !defined __LDBL_COMPAT \
454 && __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 0
455extern int __REDIRECT (vfscanf,
456 (FILE *__restrict __s,
457 const char *__restrict __format, __gnuc_va_list __arg),
458 __isoc99_vfscanf)
459 __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
460extern int __REDIRECT (vscanf, (const char *__restrict __format,
461 __gnuc_va_list __arg), __isoc99_vscanf)
462 __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
463extern int __REDIRECT_NTH (vsscanf,
464 (const char *__restrict __s,
465 const char *__restrict __format,
466 __gnuc_va_list __arg), __isoc99_vsscanf)
467 __attribute__ ((__format__ (__scanf__, 2, 0)));
468# elif !defined __REDIRECT
469extern int __isoc99_vfscanf (FILE *__restrict __s,
470 const char *__restrict __format,
471 __gnuc_va_list __arg) __wur;
472extern int __isoc99_vscanf (const char *__restrict __format,
473 __gnuc_va_list __arg) __wur;
474extern int __isoc99_vsscanf (const char *__restrict __s,
475 const char *__restrict __format,
476 __gnuc_va_list __arg) __THROW;
477# define vfscanf __isoc99_vfscanf
478# define vscanf __isoc99_vscanf
479# define vsscanf __isoc99_vsscanf
480# endif
481# endif
482#endif /* Use ISO C9x. */
483
484
485/* Read a character from STREAM.
486
487 These functions are possible cancellation points and therefore not
488 marked with __THROW. */
489extern int fgetc (FILE *__stream);
490extern int getc (FILE *__stream);
491
492/* Read a character from stdin.
493
494 This function is a possible cancellation point and therefore not
495 marked with __THROW. */
496extern int getchar (void);
497
498#ifdef __USE_POSIX199506
499/* These are defined in POSIX.1:1996.
500
501 These functions are possible cancellation points and therefore not
502 marked with __THROW. */
503extern int getc_unlocked (FILE *__stream);
504extern int getchar_unlocked (void);
505#endif /* Use POSIX. */
506
507#ifdef __USE_MISC
508/* Faster version when locking is not necessary.
509
510 This function is not part of POSIX and therefore no official
511 cancellation point. But due to similarity with an POSIX interface
512 or due to the implementation it is a cancellation point and
513 therefore not marked with __THROW. */
514extern int fgetc_unlocked (FILE *__stream);
515#endif /* Use MISC. */
516
517
518/* Write a character to STREAM.
519
520 These functions are possible cancellation points and therefore not
521 marked with __THROW.
522
523 These functions is a possible cancellation point and therefore not
524 marked with __THROW. */
525extern int fputc (int __c, FILE *__stream);
526extern int putc (int __c, FILE *__stream);
527
528/* Write a character to stdout.
529
530 This function is a possible cancellation point and therefore not
531 marked with __THROW. */
532extern int putchar (int __c);
533
534#ifdef __USE_MISC
535/* Faster version when locking is not necessary.
536
537 This function is not part of POSIX and therefore no official
538 cancellation point. But due to similarity with an POSIX interface
539 or due to the implementation it is a cancellation point and
540 therefore not marked with __THROW. */
541extern int fputc_unlocked (int __c, FILE *__stream);
542#endif /* Use MISC. */
543
544#ifdef __USE_POSIX199506
545/* These are defined in POSIX.1:1996.
546
547 These functions are possible cancellation points and therefore not
548 marked with __THROW. */
549extern int putc_unlocked (int __c, FILE *__stream);
550extern int putchar_unlocked (int __c);
551#endif /* Use POSIX. */
552
553
554#if defined __USE_MISC \
555 || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
556/* Get a word (int) from STREAM. */
557extern int getw (FILE *__stream);
558
559/* Write a word (int) to STREAM. */
560extern int putw (int __w, FILE *__stream);
561#endif
562
563
564/* Get a newline-terminated string of finite length from STREAM.
565
566 This function is a possible cancellation point and therefore not
567 marked with __THROW. */
568extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
569 __wur __attr_access ((__write_only__, 1, 2));
570
571#if __GLIBC_USE (DEPRECATED_GETS)
572/* Get a newline-terminated string from stdin, removing the newline.
573
574 This function is impossible to use safely. It has been officially
575 removed from ISO C11 and ISO C++14, and we have also removed it
576 from the _GNU_SOURCE feature list. It remains available when
577 explicitly using an old ISO C, Unix, or POSIX standard.
578
579 This function is a possible cancellation point and therefore not
580 marked with __THROW. */
581extern char *gets (char *__s) __wur __attribute_deprecated__;
582#endif
583
584#ifdef __USE_GNU
585/* This function does the same as `fgets' but does not lock the stream.
586
587 This function is not part of POSIX and therefore no official
588 cancellation point. But due to similarity with an POSIX interface
589 or due to the implementation it is a cancellation point and
590 therefore not marked with __THROW. */
591extern char *fgets_unlocked (char *__restrict __s, int __n,
592 FILE *__restrict __stream) __wur
593 __attr_access ((__write_only__, 1, 2));
594#endif
595
596
597#if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2)
598/* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
599 (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
600 NULL), pointing to *N characters of space. It is realloc'd as
601 necessary. Returns the number of characters read (not including the
602 null terminator), or -1 on error or EOF.
603
604 These functions are not part of POSIX and therefore no official
605 cancellation point. But due to similarity with an POSIX interface
606 or due to the implementation they are cancellation points and
607 therefore not marked with __THROW. */
608extern __ssize_t __getdelim (char **__restrict __lineptr,
609 size_t *__restrict __n, int __delimiter,
610 FILE *__restrict __stream) __wur;
611extern __ssize_t getdelim (char **__restrict __lineptr,
612 size_t *__restrict __n, int __delimiter,
613 FILE *__restrict __stream) __wur;
614
615/* Like `getdelim', but reads up to a newline.
616
617 This function is not part of POSIX and therefore no official
618 cancellation point. But due to similarity with an POSIX interface
619 or due to the implementation it is a cancellation point and
620 therefore not marked with __THROW. */
621extern __ssize_t getline (char **__restrict __lineptr,
622 size_t *__restrict __n,
623 FILE *__restrict __stream) __wur;
624#endif
625
626
627/* Write a string to STREAM.
628
629 This function is a possible cancellation point and therefore not
630 marked with __THROW. */
631extern int fputs (const char *__restrict __s, FILE *__restrict __stream);
632
633/* Write a string, followed by a newline, to stdout.
634
635 This function is a possible cancellation point and therefore not
636 marked with __THROW. */
637extern int puts (const char *__s);
638
639
640/* Push a character back onto the input buffer of STREAM.
641
642 This function is a possible cancellation point and therefore not
643 marked with __THROW. */
644extern int ungetc (int __c, FILE *__stream);
645
646
647/* Read chunks of generic data from STREAM.
648
649 This function is a possible cancellation point and therefore not
650 marked with __THROW. */
651extern size_t fread (void *__restrict __ptr, size_t __size,
652 size_t __n, FILE *__restrict __stream) __wur;
653/* Write chunks of generic data to STREAM.
654
655 This function is a possible cancellation point and therefore not
656 marked with __THROW. */
657extern size_t fwrite (const void *__restrict __ptr, size_t __size,
658 size_t __n, FILE *__restrict __s);
659
660#ifdef __USE_GNU
661/* This function does the same as `fputs' but does not lock the stream.
662
663 This function is not part of POSIX and therefore no official
664 cancellation point. But due to similarity with an POSIX interface
665 or due to the implementation it is a cancellation point and
666 therefore not marked with __THROW. */
667extern int fputs_unlocked (const char *__restrict __s,
668 FILE *__restrict __stream);
669#endif
670
671#ifdef __USE_MISC
672/* Faster versions when locking is not necessary.
673
674 These functions are not part of POSIX and therefore no official
675 cancellation point. But due to similarity with an POSIX interface
676 or due to the implementation they are cancellation points and
677 therefore not marked with __THROW. */
678extern size_t fread_unlocked (void *__restrict __ptr, size_t __size,
679 size_t __n, FILE *__restrict __stream) __wur;
680extern size_t fwrite_unlocked (const void *__restrict __ptr, size_t __size,
681 size_t __n, FILE *__restrict __stream);
682#endif
683
684
685/* Seek to a certain position on STREAM.
686
687 This function is a possible cancellation point and therefore not
688 marked with __THROW. */
689extern int fseek (FILE *__stream, long int __off, int __whence);
690/* Return the current position of STREAM.
691
692 This function is a possible cancellation point and therefore not
693 marked with __THROW. */
694extern long int ftell (FILE *__stream) __wur;
695/* Rewind to the beginning of STREAM.
696
697 This function is a possible cancellation point and therefore not
698 marked with __THROW. */
699extern void rewind (FILE *__stream);
700
701/* The Single Unix Specification, Version 2, specifies an alternative,
702 more adequate interface for the two functions above which deal with
703 file offset. `long int' is not the right type. These definitions
704 are originally defined in the Large File Support API. */
705
706#if defined __USE_LARGEFILE || defined __USE_XOPEN2K
707# ifndef __USE_FILE_OFFSET64
708/* Seek to a certain position on STREAM.
709
710 This function is a possible cancellation point and therefore not
711 marked with __THROW. */
712extern int fseeko (FILE *__stream, __off_t __off, int __whence);
713/* Return the current position of STREAM.
714
715 This function is a possible cancellation point and therefore not
716 marked with __THROW. */
717extern __off_t ftello (FILE *__stream) __wur;
718# else
719# ifdef __REDIRECT
720extern int __REDIRECT (fseeko,
721 (FILE *__stream, __off64_t __off, int __whence),
722 fseeko64);
723extern __off64_t __REDIRECT (ftello, (FILE *__stream), ftello64);
724# else
725# define fseeko fseeko64
726# define ftello ftello64
727# endif
728# endif
729#endif
730
731#ifndef __USE_FILE_OFFSET64
732/* Get STREAM's position.
733
734 This function is a possible cancellation point and therefore not
735 marked with __THROW. */
736extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos);
737/* Set STREAM's position.
738
739 This function is a possible cancellation point and therefore not
740 marked with __THROW. */
741extern int fsetpos (FILE *__stream, const fpos_t *__pos);
742#else
743# ifdef __REDIRECT
744extern int __REDIRECT (fgetpos, (FILE *__restrict __stream,
745 fpos_t *__restrict __pos), fgetpos64);
746extern int __REDIRECT (fsetpos,
747 (FILE *__stream, const fpos_t *__pos), fsetpos64);
748# else
749# define fgetpos fgetpos64
750# define fsetpos fsetpos64
751# endif
752#endif
753
754#ifdef __USE_LARGEFILE64
755extern int fseeko64 (FILE *__stream, __off64_t __off, int __whence);
756extern __off64_t ftello64 (FILE *__stream) __wur;
757extern int fgetpos64 (FILE *__restrict __stream, fpos64_t *__restrict __pos);
758extern int fsetpos64 (FILE *__stream, const fpos64_t *__pos);
759#endif
760
761/* Clear the error and EOF indicators for STREAM. */
762extern void clearerr (FILE *__stream) __THROW;
763/* Return the EOF indicator for STREAM. */
764extern int feof (FILE *__stream) __THROW __wur;
765/* Return the error indicator for STREAM. */
766extern int ferror (FILE *__stream) __THROW __wur;
767
768#ifdef __USE_MISC
769/* Faster versions when locking is not required. */
770extern void clearerr_unlocked (FILE *__stream) __THROW;
771extern int feof_unlocked (FILE *__stream) __THROW __wur;
772extern int ferror_unlocked (FILE *__stream) __THROW __wur;
773#endif
774
775
776/* Print a message describing the meaning of the value of errno.
777
778 This function is a possible cancellation point and therefore not
779 marked with __THROW. */
780extern void perror (const char *__s);
781
782
783#ifdef __USE_POSIX
784/* Return the system file descriptor for STREAM. */
785extern int fileno (FILE *__stream) __THROW __wur;
786#endif /* Use POSIX. */
787
788#ifdef __USE_MISC
789/* Faster version when locking is not required. */
790extern int fileno_unlocked (FILE *__stream) __THROW __wur;
791#endif
792
793
794#ifdef __USE_POSIX2
795/* Create a new stream connected to a pipe running the given command.
796
797 This function is a possible cancellation point and therefore not
798 marked with __THROW. */
799extern FILE *popen (const char *__command, const char *__modes) __wur;
800
801/* Close a stream opened by popen and return the status of its child.
802
803 This function is a possible cancellation point and therefore not
804 marked with __THROW. */
805extern int pclose (FILE *__stream);
806#endif
807
808
809#ifdef __USE_POSIX
810/* Return the name of the controlling terminal. */
811extern char *ctermid (char *__s) __THROW;
812#endif /* Use POSIX. */
813
814
815#if (defined __USE_XOPEN && !defined __USE_XOPEN2K) || defined __USE_GNU
816/* Return the name of the current user. */
817extern char *cuserid (char *__s);
818#endif /* Use X/Open, but not issue 6. */
819
820
821#ifdef __USE_GNU
822struct obstack; /* See <obstack.h>. */
823
824/* Write formatted output to an obstack. */
825extern int obstack_printf (struct obstack *__restrict __obstack,
826 const char *__restrict __format, ...)
827 __THROWNL __attribute__ ((__format__ (__printf__, 2, 3)));
828extern int obstack_vprintf (struct obstack *__restrict __obstack,
829 const char *__restrict __format,
830 __gnuc_va_list __args)
831 __THROWNL __attribute__ ((__format__ (__printf__, 2, 0)));
832#endif /* Use GNU. */
833
834
835#ifdef __USE_POSIX199506
836/* These are defined in POSIX.1:1996. */
837
838/* Acquire ownership of STREAM. */
839extern void flockfile (FILE *__stream) __THROW;
840
841/* Try to acquire ownership of STREAM but do not block if it is not
842 possible. */
843extern int ftrylockfile (FILE *__stream) __THROW __wur;
844
845/* Relinquish the ownership granted for STREAM. */
846extern void funlockfile (FILE *__stream) __THROW;
847#endif /* POSIX */
848
849#if defined __USE_XOPEN && !defined __USE_XOPEN2K && !defined __USE_GNU
850/* X/Open Issues 1-5 required getopt to be declared in this
851 header. It was removed in Issue 6. GNU follows Issue 6. */
852# include <bits/getopt_posix.h>
853#endif
854
855/* Slow-path routines used by the optimized inline functions in
856 bits/stdio.h. */
857extern int __uflow (FILE *);
858extern int __overflow (FILE *, int);
859
860/* If we are compiling with optimizing read this file. It contains
861 several optimizing inline functions and macros. */
862#ifdef __USE_EXTERN_INLINES
863# include <bits/stdio.h>
864#endif
865#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
866# include <bits/stdio2.h>
867#endif
868
869#include <bits/floatn.h>
870#if defined __LDBL_COMPAT || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1
871# include <bits/stdio-ldbl.h>
872#endif
873
874__END_DECLS
875
876#endif /* <stdio.h> included. */
877