Re: RTC wakealarm write-only, still has 644 permissions

[Pavel Machek <pavel@ucw.cz>]

Hi!

> > > ...should they be changed to 200? Or perhaps file should be readable?
> 
> No, mode 644 is fine.  No reason to prevent "other" people from
> reading the alarm time (is there?) and if you write a legal value,
> that will work.  So $SUBJECT is no problem at all.

Yep, agreed. I was confused by fact that it does not give invalid
values back. 

> > > root@amd:/sys/class/rtc/rtc0# cat wakealarm 
> > > root@amd:/sys/class/rtc/rtc0# echo 132719 > wakealarm 
> 
> At which point I'd expect
> 
> # echo $?
> 
> would indicate the write failed.  That's a LONG time in the
> past (January 2, 1970), so that setting would be rejected.

echo $? says 0 here :-(.

> > > root@amd:/sys/class/rtc/rtc0# 
> > > 
> > > ...standard PC with reasonably recent kernel...
> 
> Yeah, well a "standard PC" is chock full of fairly bizarrely
> glitchey hardware.  Clocks and timers have more than their
> fair share, or x86_64 NOHZ support would be merged by now!

:-). Ok. Thinkpad x60.
								Pavel


-- 
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