923f165b29
BSD doesn't invalidate the fd stored in struct FILE, which can make it possible (via fileno(3), for example), to perform operations on an fd you didn't intend to (rather than just failing with EBADF). Fixing this makes the code slightly simpler anyway, and might help catch bad code before it ships. Bug: http://stackoverflow.com/questions/10816837/fclose-works-differently-on-android-and-linux Change-Id: I9db74584038229499197a2695c70b58ed0372a87
112 lines
3 KiB
C++
112 lines
3 KiB
C++
/*
|
|
* Copyright (C) 2014 The Android Open Source Project
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <stdio_ext.h>
|
|
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "local.h"
|
|
#include "private/libc_logging.h"
|
|
|
|
size_t __fbufsize(FILE* fp) {
|
|
return fp->_bf._size;
|
|
}
|
|
|
|
/* For a _SRW stream, we don't know whether we last read or wrote.
|
|
int __freading(FILE* fp) {
|
|
return (fp->_flags & _SRD) != 0 || ...;
|
|
}
|
|
*/
|
|
|
|
/* For a _SRW stream, we don't know whether we last read or wrote.
|
|
int __fwriting(FILE*) {
|
|
return (fp->_flags & _SWR) != 0 || ...;
|
|
}
|
|
*/
|
|
|
|
int __freadable(FILE* fp) {
|
|
return (fp->_flags & (__SRD|__SRW)) != 0;
|
|
}
|
|
|
|
int __fwritable(FILE* fp) {
|
|
return (fp->_flags & (__SWR|__SRW)) != 0;
|
|
}
|
|
|
|
int __flbf(FILE* fp) {
|
|
return (fp->_flags & __SLBF) != 0;
|
|
}
|
|
|
|
void __fpurge(FILE* fp) {
|
|
fpurge(fp);
|
|
}
|
|
|
|
size_t __fpending(FILE* fp) {
|
|
return fp->_p - fp->_bf._base;
|
|
}
|
|
|
|
void _flushlbf() {
|
|
// If we flush all streams, we know we've flushed all the line-buffered streams.
|
|
fflush(NULL);
|
|
}
|
|
|
|
int __fsetlocking(FILE* fp, int type) {
|
|
int old_state = _EXT(fp)->_caller_handles_locking ? FSETLOCKING_BYCALLER : FSETLOCKING_INTERNAL;
|
|
if (type == FSETLOCKING_QUERY) {
|
|
return old_state;
|
|
}
|
|
|
|
if (type != FSETLOCKING_INTERNAL && type != FSETLOCKING_BYCALLER) {
|
|
// The API doesn't let us report an error, so blow up.
|
|
__libc_fatal("Bad type (%d) passed to __fsetlocking", type);
|
|
}
|
|
|
|
_EXT(fp)->_caller_handles_locking = (type == FSETLOCKING_BYCALLER);
|
|
return old_state;
|
|
}
|
|
|
|
void clearerr_unlocked(FILE* fp) {
|
|
return __sclearerr(fp);
|
|
}
|
|
|
|
int feof_unlocked(FILE* fp) {
|
|
return __sfeof(fp);
|
|
}
|
|
|
|
int ferror_unlocked(FILE* fp) {
|
|
return __sferror(fp);
|
|
}
|
|
|
|
int fileno_unlocked(FILE* fp) {
|
|
int fd = fp->_file;
|
|
if (fd == -1) {
|
|
errno = EBADF;
|
|
return -1;
|
|
}
|
|
return fd;
|
|
}
|