TimesyncBackdoor.c revision 677833bc953b6cb418c701facbdcf4aa18d6c44e
/** @file
*
* VirtualBox Timesync using temporary Backdoor
*/
/*
* Copyright (C) 2006 InnoTek Systemberatung GmbH
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* General Public License as published by the Free Software Foundation,
* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
* distribution. VirtualBox OSE is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY of any kind.
*
* If you received this file as part of a commercial VirtualBox
* distribution, then only the terms of your commercial VirtualBox
* license agreement apply instead of the previous paragraph.
*/
#include <unistd.h>
#include <time.h>
void usage()
{
printf("TimesyncBackdoor [-interval <seconds>]"
" [-daemonize]"
"\n");
}
{
int secInterval = 10;
int fDaemonize = 0;
int i;
for (i = 1; i < argc; i++)
{
{
if (argc <= i)
{
usage();
return 1;
}
i++;
}
{
fDaemonize = 1;
}
else
{
usage();
return 1;
}
}
/* get port IO permission */
if (iopl(3))
{
printf("Error: could not set IOPL to 3!\n");
return 1;
}
if (fDaemonize)
daemon(1, 0);
do
{
unsigned long long time;
/* get the high 32bit, this _must_ be done first */
outl(0, 0x505);
/* get the low 32bit */
/* set the system time */
/* wait for the next run */
} while (1);
return 0;
}