/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1999-2011 AT&T Intellectual Property *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* *
***********************************************************************/
#include "sftest.h"
/* Test for /dev/null and hole-preserving code */
tmain()
{
Sfio_t* null;
Sfio_t* f;
int k, n;
static char buf[256*1024], b[256*1024];
if(!(null = sfopen(NIL(Sfio_t*),"/dev/null","w")) )
terror("Opening /dev/null");
sfsetbuf(null,NIL(char*),(size_t)SF_UNBOUND);
if(!(f = sfopen(NIL(Sfio_t*), tstfile("sf", 0), "w+")) )
terror("Creating %s", tstfile("sf", 0));
sfwrite(f,"1234",4);
sfseek(f,(Sfoff_t)1,0);
sfsync(f);
sfsetfd(null,-1);
sfsetfd(null,sffileno(f));
sfsync(null);
sfseek(f,(Sfoff_t)0,0);
if(sfread(f,buf,4) != 4 || strncmp(buf,"1234",4) != 0)
terror("Bad data");
for(k = 0; k < sizeof(buf); ++k)
buf[k] = 1;
for(k = sizeof(buf)/4; k < sizeof(buf)/2; ++k) /* make a big hole */
buf[k] = 0;
if(!(f = sfopen(f, tstfile("sf", 0), "w+")) )
terror("Creating %s", tstfile("sf", 0));
n = sizeof(buf)-127;
if(sfwrite(f,buf,n) != n)
terror("Writing large buffer");
sfseek(f,(Sfoff_t)0,0);
if(sfread(f,b,n) != n)
terror("Reading large buffer");
for(k = 0; k < n; ++k)
if(b[k] != buf[k])
terror("Bad data");
texit(0);
}