82be76b5a2
At the time I added <stdio_ext.h>, I just added what was on the man page (which matched glibc), not realizing that musl and glibc had slightly different functionality in their headers. The toybox maintainer came up with a legitimate use case for this, for which there is no portable workaround, so I'm adding it here. I'm not adding the other functions that are in musl but not glibc for lack of a motivating use case. Bug: http://lists.landley.net/htdig.cgi/toybox-landley.net/2022-April/020864.html Test: treehugger Change-Id: I073baa86ff0271064d4e2f20a584d38787ead6b0
98 lines
2.8 KiB
C++
98 lines
2.8 KiB
C++
/*
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* Copyright (C) 2014 The Android Open Source Project
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* All rights reserved.
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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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* * 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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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* 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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#include <stdio_ext.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <async_safe/log.h>
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#include "local.h"
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size_t __fbufsize(FILE* fp) {
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return fp->_bf._size;
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}
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int __freading(FILE* fp) {
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return (fp->_flags & __SRD) != 0;
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}
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int __fwriting(FILE* fp) {
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return (fp->_flags & __SWR) != 0;
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}
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int __freadable(FILE* fp) {
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return (fp->_flags & (__SRD|__SRW)) != 0;
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}
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int __fwritable(FILE* fp) {
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return (fp->_flags & (__SWR|__SRW)) != 0;
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}
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int __flbf(FILE* fp) {
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return (fp->_flags & __SLBF) != 0;
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}
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void __fpurge(FILE* fp) {
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fpurge(fp);
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}
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size_t __fpending(FILE* fp) {
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return fp->_p - fp->_bf._base;
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}
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size_t __freadahead(FILE* fp) {
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// Normally _r is the amount of input already available.
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// When there's ungetc() data, _r counts that and _ur is the previous _r.
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return fp->_r + (HASUB(fp) ? fp->_ur : 0);
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}
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void _flushlbf() {
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// If we flush all streams, we know we've flushed all the line-buffered streams.
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fflush(nullptr);
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}
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void __fseterr(FILE* fp) {
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fp->_flags |= __SERR;
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}
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int __fsetlocking(FILE* fp, int type) {
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int old_state = _EXT(fp)->_caller_handles_locking ? FSETLOCKING_BYCALLER : FSETLOCKING_INTERNAL;
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if (type == FSETLOCKING_QUERY) {
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return old_state;
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}
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if (type != FSETLOCKING_INTERNAL && type != FSETLOCKING_BYCALLER) {
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// The API doesn't let us report an error, so blow up.
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async_safe_fatal("Bad type (%d) passed to __fsetlocking", type);
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}
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_EXT(fp)->_caller_handles_locking = (type == FSETLOCKING_BYCALLER);
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return old_state;
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}
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