924888f977
__swrite() and __sseek() to higher level. According to funopen(3) they all are just wrappers to something like standard read(2), write(2) and lseek(2), i.e. must not touch stdio internals because they are replaceable with any other functions knows nothing about stdio internals. See example of funopen(3) usage in sendmail sources f.e. NOTE: this is original stdio bug, not result of my range checkin added.
116 lines
4.1 KiB
C
116 lines
4.1 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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* @(#)local.h 8.3 (Berkeley) 7/3/94
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*
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* $FreeBSD$
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*/
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#include <sys/types.h> /* for off_t */
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#include <pthread.h>
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/*
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* Information local to this implementation of stdio,
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* in particular, macros and private variables.
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*/
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extern fpos_t _sseek __P((FILE *, fpos_t, int));
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extern int _ftello __P((FILE *, fpos_t *));
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extern int _fseeko __P((FILE *, off_t, int, int));
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extern int __fflush __P((FILE *fp));
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extern int __sflush __P((FILE *));
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extern FILE *__sfp __P((void));
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extern int __srefill __P((FILE *));
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extern int __sread __P((void *, char *, int));
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extern int __swrite __P((void *, char const *, int));
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extern fpos_t __sseek __P((void *, fpos_t, int));
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extern int __sclose __P((void *));
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extern void __sinit __P((void));
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extern void _cleanup __P((void));
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extern void (*__cleanup) __P((void));
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extern void __smakebuf __P((FILE *));
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extern int __swhatbuf __P((FILE *, size_t *, int *));
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extern int _fwalk __P((int (*)(FILE *)));
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extern int __swsetup __P((FILE *));
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extern int __sflags __P((const char *, int *));
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extern int __ungetc __P((int, FILE *));
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extern int __vfprintf __P((FILE *, const char *, _BSD_VA_LIST_));
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extern int __sdidinit;
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/* hold a buncha junk that would grow the ABI */
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struct __sFILEX {
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unsigned char *_up; /* saved _p when _p is doing ungetc data */
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pthread_mutex_t fl_mutex; /* used for MT-safety */
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pthread_t fl_owner; /* current owner */
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int fl_count; /* recursive lock count */
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};
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/*
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* Return true iff the given FILE cannot be written now.
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*/
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#define cantwrite(fp) \
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((((fp)->_flags & __SWR) == 0 || \
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((fp)->_bf._base == NULL && ((fp)->_flags & __SSTR) == 0)) && \
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__swsetup(fp))
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/*
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* Test whether the given stdio file has an active ungetc buffer;
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* release such a buffer, without restoring ordinary unread data.
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*/
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#define HASUB(fp) ((fp)->_ub._base != NULL)
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#define FREEUB(fp) { \
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if ((fp)->_ub._base != (fp)->_ubuf) \
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free((char *)(fp)->_ub._base); \
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(fp)->_ub._base = NULL; \
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}
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/*
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* test for an fgetln() buffer.
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*/
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#define HASLB(fp) ((fp)->_lb._base != NULL)
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#define FREELB(fp) { \
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free((char *)(fp)->_lb._base); \
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(fp)->_lb._base = NULL; \
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}
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#define INITEXTRA(fp) { \
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(fp)->_extra->_up = NULL; \
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(fp)->_extra->fl_mutex = PTHREAD_MUTEX_INITIALIZER; \
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(fp)->_extra->fl_owner = NULL; \
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(fp)->_extra->fl_count = 0; \
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}
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