From owner-freebsd-current  Sun Jun 13 18:22:11 1999
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To: The Hermit Hacker <scrappy@hub.org>
Cc: Matthew Dillon <dillon@apollo.backplane.com>,
	"David E. Cross" <crossd@cs.rpi.edu>, freebsd-current@FreeBSD.ORG,
	freebsd-stable@FreeBSD.ORG, crossd@cs.rpi.edu
Subject: Re: MMAP() in STABLE/CURRENT ... 
In-Reply-To: Message from The Hermit Hacker <scrappy@hub.org> 
   of "Sun, 13 Jun 1999 22:02:13 -0300." <Pine.BSF.4.05.9906132201400.49155-100000@thelab.hub.org> 
Date: Sun, 13 Jun 1999 21:22:00 -0400
From: "David E. Cross" <crossd@cs.rpi.edu>
Sender: owner-freebsd-current@FreeBSD.ORG
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X-Loop: FreeBSD.ORG

Here's the code:

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/mman.h>

#define DBSIZE 733055625

int main(void)
{
	int fd;
	unsigned char *dbp;

	fd=open(argv[1], O_CREAT | O_RDWR | O_TRUNC, 0600);
	lseek(fd, DBSIZE -1, SEEK_SET);
	write(fd, &fd, 1);
	dbp=mmap(NULL, DBSIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
	close (fd);
	memset(dbp, 0, DBSIZE);
	munmap(dbp, DBSIZE);
	return 0;
}
}


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