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/** @file
*
* VirtualBox Timesync using temporary Backdoor
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#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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