1/* Define ISO C stdio on top of C++ iostreams. 
2 Copyright (C) 1991-2020 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 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