1/* Define ISO C stdio on top of C++ iostreams.
2 Copyright (C) 1991-2019 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 <http://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 is in
404 effect, this is handled in bits/stdio-ldbl.h. */
405#if !__GLIBC_USE (DEPRECATED_SCANF) && !defined __LDBL_COMPAT
406# ifdef __REDIRECT
407extern int __REDIRECT (fscanf, (FILE *__restrict __stream,
408 const char *__restrict __format, ...),
409 __isoc99_fscanf) __wur;
410extern int __REDIRECT (scanf, (const char *__restrict __format, ...),
411 __isoc99_scanf) __wur;
412extern int __REDIRECT_NTH (sscanf, (const char *__restrict __s,
413 const char *__restrict __format, ...),
414 __isoc99_sscanf);
415# else
416extern int __isoc99_fscanf (FILE *__restrict __stream,
417 const char *__restrict __format, ...) __wur;
418extern int __isoc99_scanf (const char *__restrict __format, ...) __wur;
419extern int __isoc99_sscanf (const char *__restrict __s,
420 const char *__restrict __format, ...) __THROW;
421# define fscanf __isoc99_fscanf
422# define scanf __isoc99_scanf
423# define sscanf __isoc99_sscanf
424# endif
425#endif
426
427#ifdef __USE_ISOC99
428/* Read formatted input from S into argument list ARG.
429
430 This function is a possible cancellation point and therefore not
431 marked with __THROW. */
432extern int vfscanf (FILE *__restrict __s, const char *__restrict __format,
433 __gnuc_va_list __arg)
434 __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
435
436/* Read formatted input from stdin into argument list ARG.
437
438 This function is a possible cancellation point and therefore not
439 marked with __THROW. */
440extern int vscanf (const char *__restrict __format, __gnuc_va_list __arg)
441 __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
442
443/* Read formatted input from S into argument list ARG. */
444extern int vsscanf (const char *__restrict __s,
445 const char *__restrict __format, __gnuc_va_list __arg)
446 __THROW __attribute__ ((__format__ (__scanf__, 2, 0)));
447
448/* Same redirection as above for the v*scanf family. */
449# if !__GLIBC_USE (DEPRECATED_SCANF)
450# if defined __REDIRECT && !defined __LDBL_COMPAT
451extern int __REDIRECT (vfscanf,
452 (FILE *__restrict __s,
453 const char *__restrict __format, __gnuc_va_list __arg),
454 __isoc99_vfscanf)
455 __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
456extern int __REDIRECT (vscanf, (const char *__restrict __format,
457 __gnuc_va_list __arg), __isoc99_vscanf)
458 __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
459extern int __REDIRECT_NTH (vsscanf,
460 (const char *__restrict __s,
461 const char *__restrict __format,
462 __gnuc_va_list __arg), __isoc99_vsscanf)
463 __attribute__ ((__format__ (__scanf__, 2, 0)));
464# elif !defined __REDIRECT
465extern int __isoc99_vfscanf (FILE *__restrict __s,
466 const char *__restrict __format,
467 __gnuc_va_list __arg) __wur;
468extern int __isoc99_vscanf (const char *__restrict __format,
469 __gnuc_va_list __arg) __wur;
470extern int __isoc99_vsscanf (const char *__restrict __s,
471 const char *__restrict __format,
472 __gnuc_va_list __arg) __THROW;
473# define vfscanf __isoc99_vfscanf
474# define vscanf __isoc99_vscanf
475# define vsscanf __isoc99_vsscanf
476# endif
477# endif
478#endif /* Use ISO C9x. */
479
480
481/* Read a character from STREAM.
482
483 These functions are possible cancellation points and therefore not
484 marked with __THROW. */
485extern int fgetc (FILE *__stream);
486extern int getc (FILE *__stream);
487
488/* Read a character from stdin.
489
490 This function is a possible cancellation point and therefore not
491 marked with __THROW. */
492extern int getchar (void);
493
494#ifdef __USE_POSIX199506
495/* These are defined in POSIX.1:1996.
496
497 These functions are possible cancellation points and therefore not
498 marked with __THROW. */
499extern int getc_unlocked (FILE *__stream);
500extern int getchar_unlocked (void);
501#endif /* Use POSIX. */
502
503#ifdef __USE_MISC
504/* Faster version when locking is not necessary.
505
506 This function is not part of POSIX and therefore no official
507 cancellation point. But due to similarity with an POSIX interface
508 or due to the implementation it is a cancellation point and
509 therefore not marked with __THROW. */
510extern int fgetc_unlocked (FILE *__stream);
511#endif /* Use MISC. */
512
513
514/* Write a character to STREAM.
515
516 These functions are possible cancellation points and therefore not
517 marked with __THROW.
518
519 These functions is a possible cancellation point and therefore not
520 marked with __THROW. */
521extern int fputc (int __c, FILE *__stream);
522extern int putc (int __c, FILE *__stream);
523
524/* Write a character to stdout.
525
526 This function is a possible cancellation point and therefore not
527 marked with __THROW. */
528extern int putchar (int __c);
529
530#ifdef __USE_MISC
531/* Faster version when locking is not necessary.
532
533 This function is not part of POSIX and therefore no official
534 cancellation point. But due to similarity with an POSIX interface
535 or due to the implementation it is a cancellation point and
536 therefore not marked with __THROW. */
537extern int fputc_unlocked (int __c, FILE *__stream);
538#endif /* Use MISC. */
539
540#ifdef __USE_POSIX199506
541/* These are defined in POSIX.1:1996.
542
543 These functions are possible cancellation points and therefore not
544 marked with __THROW. */
545extern int putc_unlocked (int __c, FILE *__stream);
546extern int putchar_unlocked (int __c);
547#endif /* Use POSIX. */
548
549
550#if defined __USE_MISC \
551 || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
552/* Get a word (int) from STREAM. */
553extern int getw (FILE *__stream);
554
555/* Write a word (int) to STREAM. */
556extern int putw (int __w, FILE *__stream);
557#endif
558
559
560/* Get a newline-terminated string of finite length from STREAM.
561
562 This function is a possible cancellation point and therefore not
563 marked with __THROW. */
564extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
565 __wur;
566
567#if __GLIBC_USE (DEPRECATED_GETS)
568/* Get a newline-terminated string from stdin, removing the newline.
569
570 This function is impossible to use safely. It has been officially
571 removed from ISO C11 and ISO C++14, and we have also removed it
572 from the _GNU_SOURCE feature list. It remains available when
573 explicitly using an old ISO C, Unix, or POSIX standard.
574
575 This function is a possible cancellation point and therefore not
576 marked with __THROW. */
577extern char *gets (char *__s) __wur __attribute_deprecated__;
578#endif
579
580#ifdef __USE_GNU
581/* This function does the same as `fgets' but does not lock the stream.
582
583 This function is not part of POSIX and therefore no official
584 cancellation point. But due to similarity with an POSIX interface
585 or due to the implementation it is a cancellation point and
586 therefore not marked with __THROW. */
587extern char *fgets_unlocked (char *__restrict __s, int __n,
588 FILE *__restrict __stream) __wur;
589#endif
590
591
592#if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2)
593/* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
594 (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
595 NULL), pointing to *N characters of space. It is realloc'd as
596 necessary. Returns the number of characters read (not including the
597 null terminator), or -1 on error or EOF.
598
599 These functions are not part of POSIX and therefore no official
600 cancellation point. But due to similarity with an POSIX interface
601 or due to the implementation they are cancellation points and
602 therefore not marked with __THROW. */
603extern __ssize_t __getdelim (char **__restrict __lineptr,
604 size_t *__restrict __n, int __delimiter,
605 FILE *__restrict __stream) __wur;
606extern __ssize_t getdelim (char **__restrict __lineptr,
607 size_t *__restrict __n, int __delimiter,
608 FILE *__restrict __stream) __wur;
609
610/* Like `getdelim', but reads up to a newline.
611
612 This function is not part of POSIX and therefore no official
613 cancellation point. But due to similarity with an POSIX interface
614 or due to the implementation it is a cancellation point and
615 therefore not marked with __THROW. */
616extern __ssize_t getline (char **__restrict __lineptr,
617 size_t *__restrict __n,
618 FILE *__restrict __stream) __wur;
619#endif
620
621
622/* Write a string to STREAM.
623
624 This function is a possible cancellation point and therefore not
625 marked with __THROW. */
626extern int fputs (const char *__restrict __s, FILE *__restrict __stream);
627
628/* Write a string, followed by a newline, to stdout.
629
630 This function is a possible cancellation point and therefore not
631 marked with __THROW. */
632extern int puts (const char *__s);
633
634
635/* Push a character back onto the input buffer of STREAM.
636
637 This function is a possible cancellation point and therefore not
638 marked with __THROW. */
639extern int ungetc (int __c, FILE *__stream);
640
641
642/* Read chunks of generic data from STREAM.
643
644 This function is a possible cancellation point and therefore not
645 marked with __THROW. */
646extern size_t fread (void *__restrict __ptr, size_t __size,
647 size_t __n, FILE *__restrict __stream) __wur;
648/* Write chunks of generic data to STREAM.
649
650 This function is a possible cancellation point and therefore not
651 marked with __THROW. */
652extern size_t fwrite (const void *__restrict __ptr, size_t __size,
653 size_t __n, FILE *__restrict __s);
654
655#ifdef __USE_GNU
656/* This function does the same as `fputs' but does not lock the stream.
657
658 This function is not part of POSIX and therefore no official
659 cancellation point. But due to similarity with an POSIX interface
660 or due to the implementation it is a cancellation point and
661 therefore not marked with __THROW. */
662extern int fputs_unlocked (const char *__restrict __s,
663 FILE *__restrict __stream);
664#endif
665
666#ifdef __USE_MISC
667/* Faster versions when locking is not necessary.
668
669 These functions are not part of POSIX and therefore no official
670 cancellation point. But due to similarity with an POSIX interface
671 or due to the implementation they are cancellation points and
672 therefore not marked with __THROW. */
673extern size_t fread_unlocked (void *__restrict __ptr, size_t __size,
674 size_t __n, FILE *__restrict __stream) __wur;
675extern size_t fwrite_unlocked (const void *__restrict __ptr, size_t __size,
676 size_t __n, FILE *__restrict __stream);
677#endif
678
679
680/* Seek to a certain position on STREAM.
681
682 This function is a possible cancellation point and therefore not
683 marked with __THROW. */
684extern int fseek (FILE *__stream, long int __off, int __whence);
685/* Return the current position of STREAM.
686
687 This function is a possible cancellation point and therefore not
688 marked with __THROW. */
689extern long int ftell (FILE *__stream) __wur;
690/* Rewind to the beginning of STREAM.
691
692 This function is a possible cancellation point and therefore not
693 marked with __THROW. */
694extern void rewind (FILE *__stream);
695
696/* The Single Unix Specification, Version 2, specifies an alternative,
697 more adequate interface for the two functions above which deal with
698 file offset. `long int' is not the right type. These definitions
699 are originally defined in the Large File Support API. */
700
701#if defined __USE_LARGEFILE || defined __USE_XOPEN2K
702# ifndef __USE_FILE_OFFSET64
703/* Seek to a certain position on STREAM.
704
705 This function is a possible cancellation point and therefore not
706 marked with __THROW. */
707extern int fseeko (FILE *__stream, __off_t __off, int __whence);
708/* Return the current position of STREAM.
709
710 This function is a possible cancellation point and therefore not
711 marked with __THROW. */
712extern __off_t ftello (FILE *__stream) __wur;
713# else
714# ifdef __REDIRECT
715extern int __REDIRECT (fseeko,
716 (FILE *__stream, __off64_t __off, int __whence),
717 fseeko64);
718extern __off64_t __REDIRECT (ftello, (FILE *__stream), ftello64);
719# else
720# define fseeko fseeko64
721# define ftello ftello64
722# endif
723# endif
724#endif
725
726#ifndef __USE_FILE_OFFSET64
727/* Get STREAM's position.
728
729 This function is a possible cancellation point and therefore not
730 marked with __THROW. */
731extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos);
732/* Set STREAM's position.
733
734 This function is a possible cancellation point and therefore not
735 marked with __THROW. */
736extern int fsetpos (FILE *__stream, const fpos_t *__pos);
737#else
738# ifdef __REDIRECT
739extern int __REDIRECT (fgetpos, (FILE *__restrict __stream,
740 fpos_t *__restrict __pos), fgetpos64);
741extern int __REDIRECT (fsetpos,
742 (FILE *__stream, const fpos_t *__pos), fsetpos64);
743# else
744# define fgetpos fgetpos64
745# define fsetpos fsetpos64
746# endif
747#endif
748
749#ifdef __USE_LARGEFILE64
750extern int fseeko64 (FILE *__stream, __off64_t __off, int __whence);
751extern __off64_t ftello64 (FILE *__stream) __wur;
752extern int fgetpos64 (FILE *__restrict __stream, fpos64_t *__restrict __pos);
753extern int fsetpos64 (FILE *__stream, const fpos64_t *__pos);
754#endif
755
756/* Clear the error and EOF indicators for STREAM. */
757extern void clearerr (FILE *__stream) __THROW;
758/* Return the EOF indicator for STREAM. */
759extern int feof (FILE *__stream) __THROW __wur;
760/* Return the error indicator for STREAM. */
761extern int ferror (FILE *__stream) __THROW __wur;
762
763#ifdef __USE_MISC
764/* Faster versions when locking is not required. */
765extern void clearerr_unlocked (FILE *__stream) __THROW;
766extern int feof_unlocked (FILE *__stream) __THROW __wur;
767extern int ferror_unlocked (FILE *__stream) __THROW __wur;
768#endif
769
770
771/* Print a message describing the meaning of the value of errno.
772
773 This function is a possible cancellation point and therefore not
774 marked with __THROW. */
775extern void perror (const char *__s);
776
777/* Provide the declarations for `sys_errlist' and `sys_nerr' if they
778 are available on this system. Even if available, these variables
779 should not be used directly. The `strerror' function provides
780 all the necessary functionality. */
781#include <bits/sys_errlist.h>
782
783
784#ifdef __USE_POSIX
785/* Return the system file descriptor for STREAM. */
786extern int fileno (FILE *__stream) __THROW __wur;
787#endif /* Use POSIX. */
788
789#ifdef __USE_MISC
790/* Faster version when locking is not required. */
791extern int fileno_unlocked (FILE *__stream) __THROW __wur;
792#endif
793
794
795#ifdef __USE_POSIX2
796/* Create a new stream connected to a pipe running the given command.
797
798 This function is a possible cancellation point and therefore not
799 marked with __THROW. */
800extern FILE *popen (const char *__command, const char *__modes) __wur;
801
802/* Close a stream opened by popen and return the status of its child.
803
804 This function is a possible cancellation point and therefore not
805 marked with __THROW. */
806extern int pclose (FILE *__stream);
807#endif
808
809
810#ifdef __USE_POSIX
811/* Return the name of the controlling terminal. */
812extern char *ctermid (char *__s) __THROW;
813#endif /* Use POSIX. */
814
815
816#if (defined __USE_XOPEN && !defined __USE_XOPEN2K) || defined __USE_GNU
817/* Return the name of the current user. */
818extern char *cuserid (char *__s);
819#endif /* Use X/Open, but not issue 6. */
820
821
822#ifdef __USE_GNU
823struct obstack; /* See <obstack.h>. */
824
825/* Write formatted output to an obstack. */
826extern int obstack_printf (struct obstack *__restrict __obstack,
827 const char *__restrict __format, ...)
828 __THROWNL __attribute__ ((__format__ (__printf__, 2, 3)));
829extern int obstack_vprintf (struct obstack *__restrict __obstack,
830 const char *__restrict __format,
831 __gnuc_va_list __args)
832 __THROWNL __attribute__ ((__format__ (__printf__, 2, 0)));
833#endif /* Use GNU. */
834
835
836#ifdef __USE_POSIX199506
837/* These are defined in POSIX.1:1996. */
838
839/* Acquire ownership of STREAM. */
840extern void flockfile (FILE *__stream) __THROW;
841
842/* Try to acquire ownership of STREAM but do not block if it is not
843 possible. */
844extern int ftrylockfile (FILE *__stream) __THROW __wur;
845
846/* Relinquish the ownership granted for STREAM. */
847extern void funlockfile (FILE *__stream) __THROW;
848#endif /* POSIX */
849
850#if defined __USE_XOPEN && !defined __USE_XOPEN2K && !defined __USE_GNU
851/* X/Open Issues 1-5 required getopt to be declared in this
852 header. It was removed in Issue 6. GNU follows Issue 6. */
853# include <bits/getopt_posix.h>
854#endif
855
856/* Slow-path routines used by the optimized inline functions in
857 bits/stdio.h. */
858extern int __uflow (FILE *);
859extern int __overflow (FILE *, int);
860
861/* If we are compiling with optimizing read this file. It contains
862 several optimizing inline functions and macros. */
863#ifdef __USE_EXTERN_INLINES
864# include <bits/stdio.h>
865#endif
866#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
867# include <bits/stdio2.h>
868#endif
869#ifdef __LDBL_COMPAT
870# include <bits/stdio-ldbl.h>
871#endif
872
873__END_DECLS
874
875#endif /* <stdio.h> included. */
876