示例#1
0
int do_sys_settimeofday(struct timespec *tv, struct timezone *tz)
{
	static int firsttime = 1;
	int error = 0;

	if (tv && !timespec_valid(tv))
		return -EINVAL;

	error = security_settime(tv, tz);
	if (error)
		return error;

	if (tz) {
		/* SMP safe, global irq locking makes it work. */
		sys_tz = *tz;
		if (firsttime) {
			firsttime = 0;
			if (!tv)
				warp_clock();
		}
	}
	if (tv)
	{
		/* SMP safe, again the code in arch/foo/time.c should
		 * globally block out interrupts when it runs.
		 */
		return do_settimeofday(tv);
	}
	return 0;
}
示例#2
0
int do_sys_settimeofday(struct timeval *tv, struct timezone *tz)
{
	static int firsttime = 1;

	if (!capable(CAP_SYS_TIME))
		return -EPERM;
		
	if (tz) {
		/* SMP safe, global irq locking makes it work. */
		sys_tz = *tz;
		if (firsttime) {
			firsttime = 0;
			if (!tv)
				warp_clock();
		}
	}
	if (tv)
	{
		/* SMP safe, again the code in arch/foo/time.c should
		 * globally block out interrupts when it runs.
		 */
		do_settimeofday(tv);
	}
	return 0;
}
示例#3
0
/*
 * In case for some reason the CMOS clock has not already been running
 * in UTC, but in some local time: The first time we set the timezone,
 * we will warp the clock so that it is ticking UTC time instead of
 * local time. Presumably, if someone is setting the timezone then we
 * are running in an environment where the programs understand about
 * timezones. This should be done at boot time in the /etc/rc script,
 * as soon as possible, so that the clock can be set right. Otherwise,
 * various programs will get confused when the clock gets warped.
 */
asmlinkage int sys_settimeofday(struct timeval *tv, struct timezone *tz)
{
	static int	firsttime = 1;
	struct timeval	new_tv;
	struct timezone new_tz;

	if (!suser())
		return -EPERM;
	if (tv) {
		int error = verify_area(VERIFY_READ, tv, sizeof(*tv));
		if (error)
			return error;
		memcpy_fromfs(&new_tv, tv, sizeof(*tv));
	}
	if (tz) {
		int error = verify_area(VERIFY_READ, tz, sizeof(*tz));
		if (error)
			return error;
		memcpy_fromfs(&new_tz, tz, sizeof(*tz));
	}
	if (tz) {
		sys_tz = new_tz;
		if (firsttime) {
			firsttime = 0;
			if (!tv)
				warp_clock();
		}
	}
	if (tv)
		do_settimeofday(&new_tv);
	return 0;
}
示例#4
0
文件: time.c 项目: hozmaster/octaneos
/*
 * The first time we set the timezone, we will warp the clock so that
 * it is ticking GMT time instead of local time.  Presumably, 
 * if someone is setting the timezone then we are running in an
 * environment where the programs understand about timezones.
 * This should be done at boot time in the /etc/rc script, as
 * soon as possible, so that the clock can be set right.  Otherwise,
 * various programs will get confused when the clock gets warped.
 */
asmlinkage int sys_settimeofday(struct timeval *tv, struct timezone *tz)
{
	static int	firsttime = 1;

	//if (!suser())
	//	return -EPERM;

	if (tz) {
		sys_tz.tz_minuteswest = get_fs_long((unsigned long *) tz);
		sys_tz.tz_dsttime = get_fs_long(((unsigned long *) tz)+1);
		if (firsttime) {
			firsttime = 0;
			if (!tv)
				warp_clock();
		}
	}
	if (tv) {
		int sec, usec;

		sec = get_fs_long((unsigned long *)tv);
		usec = get_fs_long(((unsigned long *)tv)+1);
	
		cli();
		/* This is revolting. We need to set the xtime.tv_usec
		 * correctly. However, the value in this location is
		 * is value at the last tick.
		 * Discover what correction gettimeofday
		 * would have done, and then undo it!
		 */
		usec -= do_gettimeoffset();

		if (usec < 0)
		{
			usec += 1000000;
			sec--;
		}
		xtime.tv_sec = sec;
		xtime.tv_usec = usec;
		time_status = TIME_BAD;
		time_maxerror = 0x70000000;
		time_esterror = 0x70000000;
		sti();
	}
	return 0;
}