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/** @file
*
* VirtualBox Timesync using temporary Backdoor
*/
/*
* Copyright (C) 2006-2017 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) 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.
*/
#include <unistd.h>
#include <asm/io.h>
#include <sys/time.h>
#include <time.h>
void usage()
{
printf("TimesyncBackdoor [-interval <seconds>]"
" [-daemonize]"
"\n");
}
int main(int argc, char *argv[])
{
int secInterval = 10;
int fDaemonize = 0;
int i;
for (i = 1; i < argc; i++)
{
if (strcmp(argv[i], "-interval") == 0)
{
if (argc <= i)
{
usage();
return 1;
}
secInterval = atoi(argv[i + 1]);
i++;
}
else if (strcmp(argv[i], "-daemonize") == 0)
{
fDaemonize = 1;
}
else
{
usage();
return 1;
}
}
/* get port IO permission */
if (iopl(3))
{
printf("Error: could not set IOPL to 3!\n");
return 1;
}
printf("VirtualBox timesync tool. Sync interval: %d seconds.\n", secInterval);
if (fDaemonize)
daemon(1, 0);
do
{
unsigned long long time;
/* get the high 32bit, this _must_ be done first */
outl(0, 0x505);
time = (unsigned long long)inl(0x505) << 32;
/* get the low 32bit */
outl(1, 0x505);
time |= inl(0x505);
/* set the system time */
struct timeval tv;
tv.tv_sec = time / (unsigned long long)1000;
tv.tv_usec = (time % (unsigned long long)1000) * 1000;
settimeofday(&tv, NULL);
/* wait for the next run */
sleep(secInterval);
} while (1);
return 0;
}
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