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fd10995478
This function is equivalent to fclose(3) function except that it does not close the underlying file descriptor. fdclose(3) is step forward to make FILE structure private. Reviewed by: wblock, jilles, jhb, pjd Approved by: pjd (mentor) Differential Revision: https://reviews.freebsd.org/D2697
525 lines
16 KiB
C
525 lines
16 KiB
C
/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)stdio.h 8.5 (Berkeley) 4/29/95
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* $FreeBSD$
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*/
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#ifndef _STDIO_H_
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#define _STDIO_H_
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#include <sys/cdefs.h>
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#include <sys/_null.h>
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#include <sys/_types.h>
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typedef __off_t fpos_t;
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#ifndef _SIZE_T_DECLARED
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typedef __size_t size_t;
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#define _SIZE_T_DECLARED
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#endif
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#if __POSIX_VISIBLE >= 200809
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#ifndef _OFF_T_DECLARED
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#define _OFF_T_DECLARED
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typedef __off_t off_t;
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#endif
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#ifndef _SSIZE_T_DECLARED
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#define _SSIZE_T_DECLARED
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typedef __ssize_t ssize_t;
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#endif
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#endif
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#if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
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#ifndef _VA_LIST_DECLARED
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typedef __va_list va_list;
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#define _VA_LIST_DECLARED
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#endif
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#endif
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#define _FSTDIO /* Define for new stdio with functions. */
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/*
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* NB: to fit things in six character monocase externals, the stdio
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* code uses the prefix `__s' for stdio objects, typically followed
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* by a three-character attempt at a mnemonic.
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*/
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/* stdio buffers */
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struct __sbuf {
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unsigned char *_base;
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int _size;
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};
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/*
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* stdio state variables.
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*
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* The following always hold:
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*
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* if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
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* _lbfsize is -_bf._size, else _lbfsize is 0
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* if _flags&__SRD, _w is 0
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* if _flags&__SWR, _r is 0
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*
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* This ensures that the getc and putc macros (or inline functions) never
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* try to write or read from a file that is in `read' or `write' mode.
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* (Moreover, they can, and do, automatically switch from read mode to
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* write mode, and back, on "r+" and "w+" files.)
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*
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* _lbfsize is used only to make the inline line-buffered output stream
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* code as compact as possible.
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*
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* _ub, _up, and _ur are used when ungetc() pushes back more characters
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* than fit in the current _bf, or when ungetc() pushes back a character
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* that does not match the previous one in _bf. When this happens,
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* _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
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* _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
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*
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* Certain members of __sFILE are accessed directly via macros or
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* inline functions. To preserve ABI compat, these members must not
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* be disturbed. These members are marked below with (*).
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*/
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struct __sFILE {
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unsigned char *_p; /* (*) current position in (some) buffer */
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int _r; /* (*) read space left for getc() */
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int _w; /* (*) write space left for putc() */
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short _flags; /* (*) flags, below; this FILE is free if 0 */
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short _file; /* (*) fileno, if Unix descriptor, else -1 */
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struct __sbuf _bf; /* (*) the buffer (at least 1 byte, if !NULL) */
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int _lbfsize; /* (*) 0 or -_bf._size, for inline putc */
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/* operations */
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void *_cookie; /* (*) cookie passed to io functions */
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int (*_close)(void *);
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int (*_read)(void *, char *, int);
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fpos_t (*_seek)(void *, fpos_t, int);
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int (*_write)(void *, const char *, int);
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/* separate buffer for long sequences of ungetc() */
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struct __sbuf _ub; /* ungetc buffer */
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unsigned char *_up; /* saved _p when _p is doing ungetc data */
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int _ur; /* saved _r when _r is counting ungetc data */
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/* tricks to meet minimum requirements even when malloc() fails */
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unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */
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unsigned char _nbuf[1]; /* guarantee a getc() buffer */
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/* separate buffer for fgetln() when line crosses buffer boundary */
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struct __sbuf _lb; /* buffer for fgetln() */
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/* Unix stdio files get aligned to block boundaries on fseek() */
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int _blksize; /* stat.st_blksize (may be != _bf._size) */
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fpos_t _offset; /* current lseek offset */
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struct pthread_mutex *_fl_mutex; /* used for MT-safety */
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struct pthread *_fl_owner; /* current owner */
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int _fl_count; /* recursive lock count */
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int _orientation; /* orientation for fwide() */
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__mbstate_t _mbstate; /* multibyte conversion state */
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};
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#ifndef _STDFILE_DECLARED
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#define _STDFILE_DECLARED
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typedef struct __sFILE FILE;
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#endif
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#ifndef _STDSTREAM_DECLARED
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__BEGIN_DECLS
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extern FILE *__stdinp;
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extern FILE *__stdoutp;
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extern FILE *__stderrp;
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__END_DECLS
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#define _STDSTREAM_DECLARED
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#endif
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#define __SLBF 0x0001 /* line buffered */
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#define __SNBF 0x0002 /* unbuffered */
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#define __SRD 0x0004 /* OK to read */
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#define __SWR 0x0008 /* OK to write */
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/* RD and WR are never simultaneously asserted */
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#define __SRW 0x0010 /* open for reading & writing */
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#define __SEOF 0x0020 /* found EOF */
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#define __SERR 0x0040 /* found error */
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#define __SMBF 0x0080 /* _bf._base is from malloc */
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#define __SAPP 0x0100 /* fdopen()ed in append mode */
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#define __SSTR 0x0200 /* this is an sprintf/snprintf string */
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#define __SOPT 0x0400 /* do fseek() optimization */
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#define __SNPT 0x0800 /* do not do fseek() optimization */
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#define __SOFF 0x1000 /* set iff _offset is in fact correct */
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#define __SMOD 0x2000 /* true => fgetln modified _p text */
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#define __SALC 0x4000 /* allocate string space dynamically */
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#define __SIGN 0x8000 /* ignore this file in _fwalk */
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/*
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* The following three definitions are for ANSI C, which took them
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* from System V, which brilliantly took internal interface macros and
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* made them official arguments to setvbuf(), without renaming them.
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* Hence, these ugly _IOxxx names are *supposed* to appear in user code.
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*
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* Although numbered as their counterparts above, the implementation
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* does not rely on this.
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*/
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#define _IOFBF 0 /* setvbuf should set fully buffered */
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#define _IOLBF 1 /* setvbuf should set line buffered */
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#define _IONBF 2 /* setvbuf should set unbuffered */
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#define BUFSIZ 1024 /* size of buffer used by setbuf */
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#define EOF (-1)
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/*
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* FOPEN_MAX is a minimum maximum, and is the number of streams that
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* stdio can provide without attempting to allocate further resources
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* (which could fail). Do not use this for anything.
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*/
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/* must be == _POSIX_STREAM_MAX <limits.h> */
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#ifndef FOPEN_MAX
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#define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */
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#endif
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#define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */
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/* System V/ANSI C; this is the wrong way to do this, do *not* use these. */
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#if __XSI_VISIBLE
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#define P_tmpdir "/tmp/"
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#endif
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#define L_tmpnam 1024 /* XXX must be == PATH_MAX */
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#define TMP_MAX 308915776
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#ifndef SEEK_SET
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#define SEEK_SET 0 /* set file offset to offset */
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#endif
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#ifndef SEEK_CUR
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#define SEEK_CUR 1 /* set file offset to current plus offset */
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#endif
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#ifndef SEEK_END
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#define SEEK_END 2 /* set file offset to EOF plus offset */
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#endif
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#define stdin __stdinp
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#define stdout __stdoutp
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#define stderr __stderrp
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__BEGIN_DECLS
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#ifdef _XLOCALE_H_
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#include <xlocale/_stdio.h>
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#endif
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/*
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* Functions defined in ANSI C standard.
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*/
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void clearerr(FILE *);
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int fclose(FILE *);
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int feof(FILE *);
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int ferror(FILE *);
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int fflush(FILE *);
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int fgetc(FILE *);
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int fgetpos(FILE * __restrict, fpos_t * __restrict);
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char *fgets(char * __restrict, int, FILE * __restrict);
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FILE *fopen(const char * __restrict, const char * __restrict);
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int fprintf(FILE * __restrict, const char * __restrict, ...);
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int fputc(int, FILE *);
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int fputs(const char * __restrict, FILE * __restrict);
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size_t fread(void * __restrict, size_t, size_t, FILE * __restrict);
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FILE *freopen(const char * __restrict, const char * __restrict, FILE * __restrict);
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int fscanf(FILE * __restrict, const char * __restrict, ...);
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int fseek(FILE *, long, int);
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int fsetpos(FILE *, const fpos_t *);
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long ftell(FILE *);
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size_t fwrite(const void * __restrict, size_t, size_t, FILE * __restrict);
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int getc(FILE *);
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int getchar(void);
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char *gets(char *);
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void perror(const char *);
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int printf(const char * __restrict, ...);
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int putc(int, FILE *);
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int putchar(int);
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int puts(const char *);
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int remove(const char *);
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int rename(const char *, const char *);
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void rewind(FILE *);
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int scanf(const char * __restrict, ...);
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void setbuf(FILE * __restrict, char * __restrict);
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int setvbuf(FILE * __restrict, char * __restrict, int, size_t);
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int sprintf(char * __restrict, const char * __restrict, ...);
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int sscanf(const char * __restrict, const char * __restrict, ...);
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FILE *tmpfile(void);
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char *tmpnam(char *);
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int ungetc(int, FILE *);
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int vfprintf(FILE * __restrict, const char * __restrict,
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__va_list);
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int vprintf(const char * __restrict, __va_list);
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int vsprintf(char * __restrict, const char * __restrict,
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__va_list);
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#if __ISO_C_VISIBLE >= 1999
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int snprintf(char * __restrict, size_t, const char * __restrict,
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...) __printflike(3, 4);
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int vfscanf(FILE * __restrict, const char * __restrict, __va_list)
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__scanflike(2, 0);
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int vscanf(const char * __restrict, __va_list) __scanflike(1, 0);
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int vsnprintf(char * __restrict, size_t, const char * __restrict,
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__va_list) __printflike(3, 0);
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int vsscanf(const char * __restrict, const char * __restrict, __va_list)
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__scanflike(2, 0);
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#endif
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/*
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* Functions defined in all versions of POSIX 1003.1.
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*/
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#if __BSD_VISIBLE || (__POSIX_VISIBLE && __POSIX_VISIBLE <= 199506)
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#define L_cuserid 17 /* size for cuserid(3); MAXLOGNAME, legacy */
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#endif
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#if __POSIX_VISIBLE
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#define L_ctermid 1024 /* size for ctermid(3); PATH_MAX */
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char *ctermid(char *);
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FILE *fdopen(int, const char *);
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int fileno(FILE *);
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#endif /* __POSIX_VISIBLE */
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#if __POSIX_VISIBLE >= 199209
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int pclose(FILE *);
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FILE *popen(const char *, const char *);
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#endif
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#if __POSIX_VISIBLE >= 199506
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int ftrylockfile(FILE *);
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void flockfile(FILE *);
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void funlockfile(FILE *);
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/*
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* These are normally used through macros as defined below, but POSIX
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* requires functions as well.
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*/
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int getc_unlocked(FILE *);
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int getchar_unlocked(void);
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int putc_unlocked(int, FILE *);
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int putchar_unlocked(int);
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#endif
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#if __BSD_VISIBLE
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void clearerr_unlocked(FILE *);
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int feof_unlocked(FILE *);
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int ferror_unlocked(FILE *);
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int fileno_unlocked(FILE *);
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#endif
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#if __POSIX_VISIBLE >= 200112
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int fseeko(FILE *, __off_t, int);
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__off_t ftello(FILE *);
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#endif
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#if __BSD_VISIBLE || __XSI_VISIBLE > 0 && __XSI_VISIBLE < 600
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int getw(FILE *);
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int putw(int, FILE *);
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#endif /* BSD or X/Open before issue 6 */
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#if __XSI_VISIBLE
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char *tempnam(const char *, const char *);
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#endif
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#if __POSIX_VISIBLE >= 200809
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FILE *fmemopen(void * __restrict, size_t, const char * __restrict);
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ssize_t getdelim(char ** __restrict, size_t * __restrict, int,
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FILE * __restrict);
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FILE *open_memstream(char **, size_t *);
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int renameat(int, const char *, int, const char *);
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int vdprintf(int, const char * __restrict, __va_list);
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/*
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* Every programmer and his dog wrote functions called getline() and dprintf()
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* before POSIX.1-2008 came along and decided to usurp the names, so we
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* don't prototype them by default unless one of the following is true:
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* a) the app has requested them specifically by defining _WITH_GETLINE or
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* _WITH_DPRINTF, respectively
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* b) the app has requested a POSIX.1-2008 environment via _POSIX_C_SOURCE
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* c) the app defines a GNUism such as _BSD_SOURCE or _GNU_SOURCE
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*/
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#ifndef _WITH_GETLINE
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#if defined(_BSD_SOURCE) || defined(_GNU_SOURCE)
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#define _WITH_GETLINE
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#elif defined(_POSIX_C_SOURCE)
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#if _POSIX_C_SOURCE >= 200809
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#define _WITH_GETLINE
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#endif
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#endif
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#endif
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#ifdef _WITH_GETLINE
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ssize_t getline(char ** __restrict, size_t * __restrict, FILE * __restrict);
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#endif
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#ifndef _WITH_DPRINTF
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#if defined(_BSD_SOURCE) || defined(_GNU_SOURCE)
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#define _WITH_DPRINTF
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#elif defined(_POSIX_C_SOURCE)
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#if _POSIX_C_SOURCE >= 200809
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#define _WITH_DPRINTF
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#endif
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#endif
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#endif
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#ifdef _WITH_DPRINTF
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int (dprintf)(int, const char * __restrict, ...);
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#endif
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#endif /* __POSIX_VISIBLE >= 200809 */
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/*
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* Routines that are purely local.
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*/
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#if __BSD_VISIBLE
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int asprintf(char **, const char *, ...) __printflike(2, 3);
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char *ctermid_r(char *);
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void fcloseall(void);
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int fdclose(FILE *, int *);
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char *fgetln(FILE *, size_t *);
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const char *fmtcheck(const char *, const char *) __format_arg(2);
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int fpurge(FILE *);
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void setbuffer(FILE *, char *, int);
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int setlinebuf(FILE *);
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int vasprintf(char **, const char *, __va_list)
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__printflike(2, 0);
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/*
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* The system error table contains messages for the first sys_nerr
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* positive errno values. Use strerror() or strerror_r() from <string.h>
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* instead.
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*/
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extern const int sys_nerr;
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extern const char * const sys_errlist[];
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/*
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* Stdio function-access interface.
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*/
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FILE *funopen(const void *,
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int (*)(void *, char *, int),
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int (*)(void *, const char *, int),
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fpos_t (*)(void *, fpos_t, int),
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int (*)(void *));
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#define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0)
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#define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0)
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/*
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* Portability hacks. See <sys/types.h>.
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*/
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#ifndef _FTRUNCATE_DECLARED
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#define _FTRUNCATE_DECLARED
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int ftruncate(int, __off_t);
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#endif
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#ifndef _LSEEK_DECLARED
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#define _LSEEK_DECLARED
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__off_t lseek(int, __off_t, int);
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#endif
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#ifndef _MMAP_DECLARED
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#define _MMAP_DECLARED
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void *mmap(void *, size_t, int, int, int, __off_t);
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#endif
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#ifndef _TRUNCATE_DECLARED
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#define _TRUNCATE_DECLARED
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int truncate(const char *, __off_t);
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#endif
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#endif /* __BSD_VISIBLE */
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/*
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* Functions internal to the implementation.
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*/
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int __srget(FILE *);
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int __swbuf(int, FILE *);
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/*
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* The __sfoo macros are here so that we can
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* define function versions in the C library.
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*/
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#define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
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#if defined(__GNUC__) && defined(__STDC__)
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static __inline int __sputc(int _c, FILE *_p) {
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if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
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return (*_p->_p++ = _c);
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else
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return (__swbuf(_c, _p));
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|
}
|
|
#else
|
|
/*
|
|
* This has been tuned to generate reasonable code on the vax using pcc.
|
|
*/
|
|
#define __sputc(c, p) \
|
|
(--(p)->_w < 0 ? \
|
|
(p)->_w >= (p)->_lbfsize ? \
|
|
(*(p)->_p = (c)), *(p)->_p != '\n' ? \
|
|
(int)*(p)->_p++ : \
|
|
__swbuf('\n', p) : \
|
|
__swbuf((int)(c), p) : \
|
|
(*(p)->_p = (c), (int)*(p)->_p++))
|
|
#endif
|
|
|
|
extern int __isthreaded;
|
|
|
|
#ifndef __cplusplus
|
|
|
|
#define __sfeof(p) (((p)->_flags & __SEOF) != 0)
|
|
#define __sferror(p) (((p)->_flags & __SERR) != 0)
|
|
#define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
|
|
#define __sfileno(p) ((p)->_file)
|
|
|
|
|
|
#define feof(p) (!__isthreaded ? __sfeof(p) : (feof)(p))
|
|
#define ferror(p) (!__isthreaded ? __sferror(p) : (ferror)(p))
|
|
#define clearerr(p) (!__isthreaded ? __sclearerr(p) : (clearerr)(p))
|
|
|
|
#if __POSIX_VISIBLE
|
|
#define fileno(p) (!__isthreaded ? __sfileno(p) : (fileno)(p))
|
|
#endif
|
|
|
|
#define getc(fp) (!__isthreaded ? __sgetc(fp) : (getc)(fp))
|
|
#define putc(x, fp) (!__isthreaded ? __sputc(x, fp) : (putc)(x, fp))
|
|
|
|
#define getchar() getc(stdin)
|
|
#define putchar(x) putc(x, stdout)
|
|
|
|
#if __BSD_VISIBLE
|
|
/*
|
|
* See ISO/IEC 9945-1 ANSI/IEEE Std 1003.1 Second Edition 1996-07-12
|
|
* B.8.2.7 for the rationale behind the *_unlocked() macros.
|
|
*/
|
|
#define feof_unlocked(p) __sfeof(p)
|
|
#define ferror_unlocked(p) __sferror(p)
|
|
#define clearerr_unlocked(p) __sclearerr(p)
|
|
#define fileno_unlocked(p) __sfileno(p)
|
|
#endif
|
|
#if __POSIX_VISIBLE >= 199506
|
|
#define getc_unlocked(fp) __sgetc(fp)
|
|
#define putc_unlocked(x, fp) __sputc(x, fp)
|
|
|
|
#define getchar_unlocked() getc_unlocked(stdin)
|
|
#define putchar_unlocked(x) putc_unlocked(x, stdout)
|
|
#endif
|
|
#endif /* __cplusplus */
|
|
|
|
__END_DECLS
|
|
#endif /* !_STDIO_H_ */
|