Avoid pathological behavior in OpenBSD's fread.

Bug: https://code.google.com/p/android/issues/detail?id=81155
Bug: 18556607
Change-Id: Idc60976b79610e2202cc42dc393dcb4ca6c42e05

1 files changed, 0 insertions, 88 deletions

diff --git a/libc/upstream-openbsd/lib/libc/stdio/fread.c b/libc/upstream-openbsd/lib/libc/stdio/fread.c
deleted file mode 100644
index 8a592f6..0000000
--- a/libc/upstream-openbsd/lib/libc/stdio/fread.c
+++ /dev/null
@@ -1,88 +0,0 @@
-/*	$OpenBSD: fread.c,v 1.12 2014/05/01 16:40:36 deraadt Exp $ */
-/*-
- * Copyright (c) 1990, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Chris Torek.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. 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.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.h>
-#include <string.h>
-#include <stdint.h>
-#include <errno.h>
-#include "local.h"
-
-#define MUL_NO_OVERFLOW	(1UL << (sizeof(size_t) * 4))
-
-size_t
-fread(void *buf, size_t size, size_t count, FILE *fp)
-{
-	size_t resid;
-	char *p;
-	int r;
-	size_t total;
-
-	/*
-	 * Extension:  Catch integer overflow
-	 */
-	if ((size >= MUL_NO_OVERFLOW || count >= MUL_NO_OVERFLOW) &&
-	    size > 0 && SIZE_MAX / size < count) {
-		errno = EOVERFLOW;
-		fp->_flags |= __SERR;
-		return (0);
-	}
-
-	/*
-	 * ANSI and SUSv2 require a return value of 0 if size or count are 0.
-	 */
-	if ((resid = count * size) == 0)
-		return (0);
-	FLOCKFILE(fp);
-	_SET_ORIENTATION(fp, -1);
-	if (fp->_r < 0)
-		fp->_r = 0;
-	total = resid;
-	p = buf;
-	while (resid > (r = fp->_r)) {
-		(void)memcpy((void *)p, (void *)fp->_p, (size_t)r);
-		fp->_p += r;
-		/* fp->_r = 0 ... done in __srefill */
-		p += r;
-		resid -= r;
-		if (__srefill(fp)) {
-			/* no more input: return partial result */
-			FUNLOCKFILE(fp);
-			return ((total - resid) / size);
-		}
-	}
-	(void)memcpy((void *)p, (void *)fp->_p, resid);
-	fp->_r -= resid;
-	fp->_p += resid;
-	FUNLOCKFILE(fp);
-	return (count);
-}