1 /* Define ISO C stdio on top of C++ iostreams.
2 Copyright (C) 1991,1994-2002,2003 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 * ISO C99 Standard: 7.19 Input/output <stdio.h>
26 #if !defined __need_FILE && !defined __need___FILE
28 # include <features.h>
32 # define __need_size_t
36 # include <bits/types.h>
38 # define __need___FILE
39 #endif /* Don't need FILE. */
42 #if !defined __FILE_defined && defined __need_FILE
45 /* The opaque type of streams. This is the definition used elsewhere. */
46 typedef struct _IO_FILE
FILE;
48 #if defined __USE_LARGEFILE64 || defined __USE_SVID || defined __USE_POSIX \
49 || defined __USE_BSD || defined __USE_ISOC99 || defined __USE_XOPEN \
50 || defined __USE_POSIX2
51 __USING_NAMESPACE_STD(FILE)
54 # define __FILE_defined 1
55 #endif /* FILE not defined. */
59 #if !defined ____FILE_defined && defined __need___FILE
61 /* The opaque type of streams. This is the definition used elsewhere. */
62 typedef struct _IO_FILE __FILE
;
64 # define ____FILE_defined 1
65 #endif /* __FILE not defined. */
70 #define _STDIO_USES_IOSTREAM
76 # ifndef _VA_LIST_DEFINED
77 typedef _G_va_list
va_list;
78 # define _VA_LIST_DEFINED
85 /* The type of the second argument to `fgetpos' and `fsetpos'. */
87 #ifndef __USE_FILE_OFFSET64
88 typedef _G_fpos_t
fpos_t;
90 typedef _G_fpos64_t
fpos_t;
93 #ifdef __USE_LARGEFILE64
94 typedef _G_fpos64_t fpos64_t
;
97 /* The possibilities for the third argument to `setvbuf'. */
98 #define _IOFBF 0 /* Fully buffered. */
99 #define _IOLBF 1 /* Line buffered. */
100 #define _IONBF 2 /* No buffering. */
103 /* Default buffer size. */
105 # define BUFSIZ _IO_BUFSIZ
109 /* End of file character.
110 Some things throughout the library rely on this being -1. */
116 /* The possibilities for the third argument to `fseek'.
117 These values should not be changed. */
118 #define SEEK_SET 0 /* Seek from beginning of file. */
119 #define SEEK_CUR 1 /* Seek from current position. */
120 #define SEEK_END 2 /* Seek from end of file. */
123 #if defined __USE_SVID || defined __USE_XOPEN
124 /* Default path prefix for `tempnam' and `tmpnam'. */
125 # define P_tmpdir "/tmp"
130 L_tmpnam How long an array of chars must be to be passed to `tmpnam'.
131 TMP_MAX The minimum number of unique filenames generated by tmpnam
132 (and tempnam when it uses tmpnam's name space),
133 or tempnam (the two are separate).
134 L_ctermid How long an array to pass to `ctermid'.
135 L_cuserid How long an array to pass to `cuserid'.
136 FOPEN_MAX Minimum number of files that can be open at once.
137 FILENAME_MAX Maximum length of a filename. */
138 #include <bits/stdio_lim.h>
141 /* Standard streams. */
142 extern struct _IO_FILE
*stdin
; /* Standard input stream. */
143 extern struct _IO_FILE
*stdout
; /* Standard output stream. */
144 extern struct _IO_FILE
*stderr
; /* Standard error output stream. */
145 /* C89/C99 say they're macros. Make them happy. */
147 #define stdout stdout
148 #define stderr stderr
150 __BEGIN_NAMESPACE_STD
151 /* Remove file FILENAME. */
152 extern int remove (__const
char *__filename
) __THROW
;
153 /* Rename file OLD to NEW. */
154 extern int rename (__const
char *__old
, __const
char *__new
) __THROW
;
158 __BEGIN_NAMESPACE_STD
159 /* Create a temporary file and open it read/write.
161 This function is a possible cancellation points and therefore not
162 marked with __THROW. */
163 #ifndef __USE_FILE_OFFSET64
164 extern FILE *tmpfile (void);
167 extern FILE *__REDIRECT (tmpfile
, (void), tmpfile64
);
169 # define tmpfile tmpfile64
173 #ifdef __USE_LARGEFILE64
174 extern FILE *tmpfile64 (void);
177 /* Generate a temporary filename. */
178 extern char *tmpnam (char *__s
) __THROW
;
182 /* This is the reentrant variant of `tmpnam'. The only difference is
183 that it does not allow S to be NULL. */
184 extern char *tmpnam_r (char *__s
) __THROW
;
188 #if defined __USE_SVID || defined __USE_XOPEN
189 /* Generate a unique temporary filename using up to five characters of PFX
190 if it is not NULL. The directory to put this file in is searched for
191 as follows: First the environment variable "TMPDIR" is checked.
192 If it contains the name of a writable directory, that directory is used.
193 If not and if DIR is not NULL, that value is checked. If that fails,
194 P_tmpdir is tried and finally "/tmp". The storage for the filename
195 is allocated by `malloc'. */
196 extern char *tempnam (__const
char *__dir
, __const
char *__pfx
)
197 __THROW __attribute_malloc__
;
201 __BEGIN_NAMESPACE_STD
204 This function is a possible cancellation point and therefore not
205 marked with __THROW. */
206 extern int fclose (FILE *__stream
);
207 /* Flush STREAM, or all streams if STREAM is NULL.
209 This function is a possible cancellation point and therefore not
210 marked with __THROW. */
211 extern int fflush (FILE *__stream
);
215 /* Faster versions when locking is not required.
217 This function is not part of POSIX and therefore no official
218 cancellation point. But due to similarity with an POSIX interface
219 or due to the implementation it is a cancellation point and
220 therefore not marked with __THROW. */
221 extern int fflush_unlocked (FILE *__stream
);
225 /* Close all streams.
227 This function is not part of POSIX and therefore no official
228 cancellation point. But due to similarity with an POSIX interface
229 or due to the implementation it is a cancellation point and
230 therefore not marked with __THROW. */
231 extern int fcloseall (void);
235 __BEGIN_NAMESPACE_STD
236 #ifndef __USE_FILE_OFFSET64
237 /* Open a file and create a new stream for it.
239 This function is a possible cancellation point and therefore not
240 marked with __THROW. */
241 extern FILE *fopen (__const
char *__restrict __filename
,
242 __const
char *__restrict __modes
);
243 /* Open a file, replacing an existing stream with it.
245 This function is a possible cancellation point and therefore not
246 marked with __THROW. */
247 extern FILE *freopen (__const
char *__restrict __filename
,
248 __const
char *__restrict __modes
,
249 FILE *__restrict __stream
);
252 extern FILE *__REDIRECT (fopen
, (__const
char *__restrict __filename
,
253 __const
char *__restrict __modes
), fopen64
);
254 extern FILE *__REDIRECT (freopen
, (__const
char *__restrict __filename
,
255 __const
char *__restrict __modes
,
256 FILE *__restrict __stream
), freopen64
);
258 # define fopen fopen64
259 # define freopen freopen64
263 #ifdef __USE_LARGEFILE64
264 extern FILE *fopen64 (__const
char *__restrict __filename
,
265 __const
char *__restrict __modes
);
266 extern FILE *freopen64 (__const
char *__restrict __filename
,
267 __const
char *__restrict __modes
,
268 FILE *__restrict __stream
);
272 /* Create a new stream that refers to an existing system file descriptor. */
273 extern FILE *fdopen (int __fd
, __const
char *__modes
) __THROW
;
277 /* Create a new stream that refers to the given magic cookie,
278 and uses the given functions for input and output. */
279 extern FILE *fopencookie (void *__restrict __magic_cookie
,
280 __const
char *__restrict __modes
,
281 _IO_cookie_io_functions_t __io_funcs
) __THROW
;
283 /* Create a new stream that refers to a memory buffer. */
284 extern FILE *fmemopen (void *__s
, size_t __len
, __const
char *__modes
) __THROW
;
286 /* Open a stream that writes into a malloc'd buffer that is expanded as
287 necessary. *BUFLOC and *SIZELOC are updated with the buffer's location
288 and the number of characters written on fflush or fclose. */
289 extern FILE *open_memstream (char **__restrict __bufloc
,
290 size_t *__restrict __sizeloc
) __THROW
;
294 __BEGIN_NAMESPACE_STD
295 /* If BUF is NULL, make STREAM unbuffered.
296 Else make it use buffer BUF, of size BUFSIZ. */
297 extern void setbuf (FILE *__restrict __stream
, char *__restrict __buf
) __THROW
;
298 /* Make STREAM use buffering mode MODE.
299 If BUF is not NULL, use N bytes of it for buffering;
300 else allocate an internal buffer N bytes long. */
301 extern int setvbuf (FILE *__restrict __stream
, char *__restrict __buf
,
302 int __modes
, size_t __n
) __THROW
;
306 /* If BUF is NULL, make STREAM unbuffered.
307 Else make it use SIZE bytes of BUF for buffering. */
308 extern void setbuffer (FILE *__restrict __stream
, char *__restrict __buf
,
309 size_t __size
) __THROW
;
311 /* Make STREAM line-buffered. */
312 extern void setlinebuf (FILE *__stream
) __THROW
;
316 __BEGIN_NAMESPACE_STD
317 /* Write formatted output to STREAM.
319 This function is a possible cancellation point and therefore not
320 marked with __THROW. */
321 extern int fprintf (FILE *__restrict __stream
,
322 __const
char *__restrict __format
, ...);
323 /* Write formatted output to stdout.
325 This function is a possible cancellation point and therefore not
326 marked with __THROW. */
327 extern int printf (__const
char *__restrict __format
, ...);
328 /* Write formatted output to S. */
329 extern int sprintf (char *__restrict __s
,
330 __const
char *__restrict __format
, ...) __THROW
;
332 /* Write formatted output to S from argument list ARG.
334 This function is a possible cancellation point and therefore not
335 marked with __THROW. */
336 extern int vfprintf (FILE *__restrict __s
, __const
char *__restrict __format
,
338 /* Write formatted output to stdout from argument list ARG.
340 This function is a possible cancellation point and therefore not
341 marked with __THROW. */
342 extern int vprintf (__const
char *__restrict __format
, _G_va_list __arg
);
343 /* Write formatted output to S from argument list ARG. */
344 extern int vsprintf (char *__restrict __s
, __const
char *__restrict __format
,
345 _G_va_list __arg
) __THROW
;
348 #if defined __USE_BSD || defined __USE_ISOC99 || defined __USE_UNIX98
349 __BEGIN_NAMESPACE_C99
350 /* Maximum chars of output to write in MAXLEN. */
351 extern int snprintf (char *__restrict __s
, size_t __maxlen
,
352 __const
char *__restrict __format
, ...)
353 __THROW
__attribute__ ((__format__ (__printf__
, 3, 4)));
355 extern int vsnprintf (char *__restrict __s
, size_t __maxlen
,
356 __const
char *__restrict __format
, _G_va_list __arg
)
357 __THROW
__attribute__ ((__format__ (__printf__
, 3, 0)));
362 /* Write formatted output to a string dynamically allocated with `malloc'.
363 Store the address of the string in *PTR. */
364 extern int vasprintf (char **__restrict __ptr
, __const
char *__restrict __f
,
366 __THROW
__attribute__ ((__format__ (__printf__
, 2, 0)));
367 extern int __asprintf (char **__restrict __ptr
,
368 __const
char *__restrict __fmt
, ...)
369 __THROW
__attribute__ ((__format__ (__printf__
, 2, 3)));
370 extern int asprintf (char **__restrict __ptr
,
371 __const
char *__restrict __fmt
, ...)
372 __THROW
__attribute__ ((__format__ (__printf__
, 2, 3)));
374 /* Write formatted output to a file descriptor.
376 These functions are not part of POSIX and therefore no official
377 cancellation point. But due to similarity with an POSIX interface
378 or due to the implementation they are cancellation points and
379 therefore not marked with __THROW. */
380 extern int vdprintf (int __fd
, __const
char *__restrict __fmt
,
382 __attribute__ ((__format__ (__printf__
, 2, 0)));
383 extern int dprintf (int __fd
, __const
char *__restrict __fmt
, ...)
384 __attribute__ ((__format__ (__printf__
, 2, 3)));
388 __BEGIN_NAMESPACE_STD
389 /* Read formatted input from STREAM.
391 This function is a possible cancellation point and therefore not
392 marked with __THROW. */
393 extern int fscanf (FILE *__restrict __stream
,
394 __const
char *__restrict __format
, ...);
395 /* Read formatted input from stdin.
397 This function is a possible cancellation point and therefore not
398 marked with __THROW. */
399 extern int scanf (__const
char *__restrict __format
, ...);
400 /* Read formatted input from S. */
401 extern int sscanf (__const
char *__restrict __s
,
402 __const
char *__restrict __format
, ...) __THROW
;
406 __BEGIN_NAMESPACE_C99
407 /* Read formatted input from S into argument list ARG.
409 This function is a possible cancellation point and therefore not
410 marked with __THROW. */
411 extern int vfscanf (FILE *__restrict __s
, __const
char *__restrict __format
,
413 __attribute__ ((__format__ (__scanf__
, 2, 0)));
415 /* Read formatted input from stdin into argument list ARG.
417 This function is a possible cancellation point and therefore not
418 marked with __THROW. */
419 extern int vscanf (__const
char *__restrict __format
, _G_va_list __arg
)
420 __attribute__ ((__format__ (__scanf__
, 1, 0)));
422 /* Read formatted input from S into argument list ARG. */
423 extern int vsscanf (__const
char *__restrict __s
,
424 __const
char *__restrict __format
, _G_va_list __arg
)
425 __THROW
__attribute__ ((__format__ (__scanf__
, 2, 0)));
427 #endif /* Use ISO C9x. */
430 __BEGIN_NAMESPACE_STD
431 /* Read a character from STREAM.
433 These functions are possible cancellation points and therefore not
434 marked with __THROW. */
435 extern int fgetc (FILE *__stream
);
436 extern int getc (FILE *__stream
);
438 /* Read a character from stdin.
440 This function is a possible cancellation point and therefore not
441 marked with __THROW. */
442 extern int getchar (void);
445 /* The C standard explicitly says this is a macro, so we always do the
446 optimization for it. */
447 #define getc(_fp) _IO_getc (_fp)
449 #if defined __USE_POSIX || defined __USE_MISC
450 /* These are defined in POSIX.1:1996.
452 These functions are possible cancellation points and therefore not
453 marked with __THROW. */
454 extern int getc_unlocked (FILE *__stream
);
455 extern int getchar_unlocked (void);
456 #endif /* Use POSIX or MISC. */
459 /* Faster version when locking is not necessary.
461 This function is not part of POSIX and therefore no official
462 cancellation point. But due to similarity with an POSIX interface
463 or due to the implementation it is a cancellation point and
464 therefore not marked with __THROW. */
465 extern int fgetc_unlocked (FILE *__stream
);
466 #endif /* Use MISC. */
469 __BEGIN_NAMESPACE_STD
470 /* Write a character to STREAM.
472 These functions are possible cancellation points and therefore not
475 These functions is a possible cancellation point and therefore not
476 marked with __THROW. */
477 extern int fputc (int __c
, FILE *__stream
);
478 extern int putc (int __c
, FILE *__stream
);
480 /* Write a character to stdout.
482 This function is a possible cancellation point and therefore not
483 marked with __THROW. */
484 extern int putchar (int __c
);
487 /* The C standard explicitly says this can be a macro,
488 so we always do the optimization for it. */
489 #define putc(_ch, _fp) _IO_putc (_ch, _fp)
492 /* Faster version when locking is not necessary.
494 This function is not part of POSIX and therefore no official
495 cancellation point. But due to similarity with an POSIX interface
496 or due to the implementation it is a cancellation point and
497 therefore not marked with __THROW. */
498 extern int fputc_unlocked (int __c
, FILE *__stream
);
499 #endif /* Use MISC. */
501 #if defined __USE_POSIX || defined __USE_MISC
502 /* These are defined in POSIX.1:1996.
504 These functions are possible cancellation points and therefore not
505 marked with __THROW. */
506 extern int putc_unlocked (int __c
, FILE *__stream
);
507 extern int putchar_unlocked (int __c
);
508 #endif /* Use POSIX or MISC. */
511 #if defined __USE_SVID || defined __USE_MISC \
512 || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
513 /* Get a word (int) from STREAM. */
514 extern int getw (FILE *__stream
);
516 /* Write a word (int) to STREAM. */
517 extern int putw (int __w
, FILE *__stream
);
521 __BEGIN_NAMESPACE_STD
522 /* Get a newline-terminated string of finite length from STREAM.
524 This function is a possible cancellation point and therefore not
525 marked with __THROW. */
526 extern char *fgets (char *__restrict __s
, int __n
, FILE *__restrict __stream
);
528 /* Get a newline-terminated string from stdin, removing the newline.
529 DO NOT USE THIS FUNCTION!! There is no limit on how much it will read.
531 This function is a possible cancellation point and therefore not
532 marked with __THROW. */
533 extern char *gets (char *__s
);
537 /* This function does the same as `fgets' but does not lock the stream.
539 This function is not part of POSIX and therefore no official
540 cancellation point. But due to similarity with an POSIX interface
541 or due to the implementation it is a cancellation point and
542 therefore not marked with __THROW. */
543 extern char *fgets_unlocked (char *__restrict __s
, int __n
,
544 FILE *__restrict __stream
);
549 /* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
550 (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
551 NULL), pointing to *N characters of space. It is realloc'd as
552 necessary. Returns the number of characters read (not including the
553 null terminator), or -1 on error or EOF.
555 These functions are not part of POSIX and therefore no official
556 cancellation point. But due to similarity with an POSIX interface
557 or due to the implementation they are cancellation points and
558 therefore not marked with __THROW. */
559 extern _IO_ssize_t
__getdelim (char **__restrict __lineptr
,
560 size_t *__restrict __n
, int __delimiter
,
561 FILE *__restrict __stream
);
562 extern _IO_ssize_t
getdelim (char **__restrict __lineptr
,
563 size_t *__restrict __n
, int __delimiter
,
564 FILE *__restrict __stream
);
566 /* Like `getdelim', but reads up to a newline.
568 This function is not part of POSIX and therefore no official
569 cancellation point. But due to similarity with an POSIX interface
570 or due to the implementation it is a cancellation point and
571 therefore not marked with __THROW. */
572 extern _IO_ssize_t
getline (char **__restrict __lineptr
,
573 size_t *__restrict __n
,
574 FILE *__restrict __stream
);
578 __BEGIN_NAMESPACE_STD
579 /* Write a string to STREAM.
581 This function is a possible cancellation points and therefore not
582 marked with __THROW. */
583 extern int fputs (__const
char *__restrict __s
, FILE *__restrict __stream
);
585 /* Write a string, followed by a newline, to stdout.
587 This function is a possible cancellation points and therefore not
588 marked with __THROW. */
589 extern int puts (__const
char *__s
);
592 /* Push a character back onto the input buffer of STREAM.
594 This function is a possible cancellation points and therefore not
595 marked with __THROW. */
596 extern int ungetc (int __c
, FILE *__stream
);
599 /* Read chunks of generic data from STREAM.
601 This function is a possible cancellation points and therefore not
602 marked with __THROW. */
603 extern size_t fread (void *__restrict __ptr
, size_t __size
,
604 size_t __n
, FILE *__restrict __stream
);
605 /* Write chunks of generic data to STREAM.
607 This function is a possible cancellation points and therefore not
608 marked with __THROW. */
609 extern size_t fwrite (__const
void *__restrict __ptr
, size_t __size
,
610 size_t __n
, FILE *__restrict __s
);
614 /* This function does the same as `fputs' but does not lock the stream.
616 This function is not part of POSIX and therefore no official
617 cancellation point. But due to similarity with an POSIX interface
618 or due to the implementation it is a cancellation point and
619 therefore not marked with __THROW. */
620 extern int fputs_unlocked (__const
char *__restrict __s
,
621 FILE *__restrict __stream
);
625 /* Faster versions when locking is not necessary.
627 These functions are not part of POSIX and therefore no official
628 cancellation point. But due to similarity with an POSIX interface
629 or due to the implementation they are cancellation points and
630 therefore not marked with __THROW. */
631 extern size_t fread_unlocked (void *__restrict __ptr
, size_t __size
,
632 size_t __n
, FILE *__restrict __stream
);
633 extern size_t fwrite_unlocked (__const
void *__restrict __ptr
, size_t __size
,
634 size_t __n
, FILE *__restrict __stream
);
638 __BEGIN_NAMESPACE_STD
639 /* Seek to a certain position on STREAM.
641 This function is a possible cancellation point and therefore not
642 marked with __THROW. */
643 extern int fseek (FILE *__stream
, long int __off
, int __whence
);
644 /* Return the current position of STREAM.
646 This function is a possible cancellation point and therefore not
647 marked with __THROW. */
648 extern long int ftell (FILE *__stream
);
649 /* Rewind to the beginning of STREAM.
651 This function is a possible cancellation point and therefore not
652 marked with __THROW. */
653 extern void rewind (FILE *__stream
);
656 /* The Single Unix Specification, Version 2, specifies an alternative,
657 more adequate interface for the two functions above which deal with
658 file offset. `long int' is not the right type. These definitions
659 are originally defined in the Large File Support API. */
661 #ifdef __USE_LARGEFILE
662 # ifndef __USE_FILE_OFFSET64
663 /* Seek to a certain position on STREAM.
665 This function is a possible cancellation point and therefore not
666 marked with __THROW. */
667 extern int fseeko (FILE *__stream
, __off_t __off
, int __whence
);
668 /* Return the current position of STREAM.
670 This function is a possible cancellation point and therefore not
671 marked with __THROW. */
672 extern __off_t
ftello (FILE *__stream
);
675 extern int __REDIRECT (fseeko
,
676 (FILE *__stream
, __off64_t __off
, int __whence
),
678 extern __off64_t
__REDIRECT (ftello
, (FILE *__stream
), ftello64
);
680 # define fseeko fseeko64
681 # define ftello ftello64
686 __BEGIN_NAMESPACE_STD
687 #ifndef __USE_FILE_OFFSET64
688 /* Get STREAM's position.
690 This function is a possible cancellation point and therefore not
691 marked with __THROW. */
692 extern int fgetpos (FILE *__restrict __stream
, fpos_t *__restrict __pos
);
693 /* Set STREAM's position.
695 This function is a possible cancellation point and therefore not
696 marked with __THROW. */
697 extern int fsetpos (FILE *__stream
, __const
fpos_t *__pos
);
700 extern int __REDIRECT (fgetpos
, (FILE *__restrict __stream
,
701 fpos_t *__restrict __pos
), fgetpos64
);
702 extern int __REDIRECT (fsetpos
,
703 (FILE *__stream
, __const
fpos_t *__pos
), fsetpos64
);
705 # define fgetpos fgetpos64
706 # define fsetpos fsetpos64
711 #ifdef __USE_LARGEFILE64
712 extern int fseeko64 (FILE *__stream
, __off64_t __off
, int __whence
);
713 extern __off64_t
ftello64 (FILE *__stream
);
714 extern int fgetpos64 (FILE *__restrict __stream
, fpos64_t
*__restrict __pos
);
715 extern int fsetpos64 (FILE *__stream
, __const fpos64_t
*__pos
);
718 __BEGIN_NAMESPACE_STD
719 /* Clear the error and EOF indicators for STREAM. */
720 extern void clearerr (FILE *__stream
) __THROW
;
721 /* Return the EOF indicator for STREAM. */
722 extern int feof (FILE *__stream
) __THROW
;
723 /* Return the error indicator for STREAM. */
724 extern int ferror (FILE *__stream
) __THROW
;
728 /* Faster versions when locking is not required. */
729 extern void clearerr_unlocked (FILE *__stream
) __THROW
;
730 extern int feof_unlocked (FILE *__stream
) __THROW
;
731 extern int ferror_unlocked (FILE *__stream
) __THROW
;
735 __BEGIN_NAMESPACE_STD
736 /* Print a message describing the meaning of the value of errno.
738 This function is a possible cancellation point and therefore not
739 marked with __THROW. */
740 extern void perror (__const
char *__s
);
743 /* Provide the declarations for `sys_errlist' and `sys_nerr' if they
744 are available on this system. Even if available, these variables
745 should not be used directly. The `strerror' function provides
746 all the necessary functionality. */
747 #include <bits/sys_errlist.h>
751 /* Return the system file descriptor for STREAM. */
752 extern int fileno (FILE *__stream
) __THROW
;
753 #endif /* Use POSIX. */
756 /* Faster version when locking is not required. */
757 extern int fileno_unlocked (FILE *__stream
) __THROW
;
761 #if (defined __USE_POSIX2 || defined __USE_SVID || defined __USE_BSD || \
763 /* Create a new stream connected to a pipe running the given command.
765 This function is a possible cancellation point and therefore not
766 marked with __THROW. */
767 extern FILE *popen (__const
char *__command
, __const
char *__modes
);
769 /* Close a stream opened by popen and return the status of its child.
771 This function is a possible cancellation point and therefore not
772 marked with __THROW. */
773 extern int pclose (FILE *__stream
);
778 /* Return the name of the controlling terminal. */
779 extern char *ctermid (char *__s
) __THROW
;
780 #endif /* Use POSIX. */
784 /* Return the name of the current user. */
785 extern char *cuserid (char *__s
);
786 #endif /* Use X/Open, but not issue 6. */
790 struct obstack
; /* See <obstack.h>. */
792 /* Write formatted output to an obstack. */
793 extern int obstack_printf (struct obstack
*__restrict __obstack
,
794 __const
char *__restrict __format
, ...)
795 __THROW
__attribute__ ((__format__ (__printf__
, 2, 3)));
796 extern int obstack_vprintf (struct obstack
*__restrict __obstack
,
797 __const
char *__restrict __format
,
799 __THROW
__attribute__ ((__format__ (__printf__
, 2, 0)));
800 #endif /* Use GNU. */
803 #if defined __USE_POSIX || defined __USE_MISC
804 /* These are defined in POSIX.1:1996. */
806 /* Acquire ownership of STREAM. */
807 extern void flockfile (FILE *__stream
) __THROW
;
809 /* Try to acquire ownership of STREAM but do not block if it is not
811 extern int ftrylockfile (FILE *__stream
) __THROW
;
813 /* Relinquish the ownership granted for STREAM. */
814 extern void funlockfile (FILE *__stream
) __THROW
;
815 #endif /* POSIX || misc */
817 #if defined __USE_XOPEN && !defined __USE_XOPEN2K && !defined __USE_GNU
818 /* The X/Open standard requires some functions and variables to be
819 declared here which do not belong into this header. But we have to
820 follow. In GNU mode we don't do this nonsense. */
821 # define __need_getopt
823 #endif /* X/Open, but not issue 6 and not for GNU. */
825 /* If we are compiling with optimizing read this file. It contains
826 several optimizing inline functions and macros. */
827 #ifdef __USE_EXTERN_INLINES
828 # include <bits/stdio.h>
833 #endif /* <stdio.h> included. */
835 #endif /* !_STDIO_H */