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Date: Thu, 20 Sep 2007 12:50:02 +0200 From: Pavel Machek <pavel@....cz> To: a.zummo@...ertech.it, rtc-linux@...glegroups.com, kernel list <linux-kernel@...r.kernel.org>, dbrownell@...rs.sourceforge.net Subject: Re: RTC wakealarm write-only, still has 644 permissions Hi! > ...should they be changed to 200? Or perhaps file should be readable? > > root@amd:/sys/class/rtc/rtc0# cat wakealarm > root@amd:/sys/class/rtc/rtc0# echo 132719 > wakealarm > root@amd:/sys/class/rtc/rtc0# ls -al wakealarm > -rw-r--r-- 1 root root 0 Sep 20 12:30 wakealarm > root@amd:/sys/class/rtc/rtc0# cat wakealarm > root@amd:/sys/class/rtc/rtc0# cat wakealarm > root@amd:/sys/class/rtc/rtc0# > > > ...standard PC with reasonably recent kernel... Hmm, something is definitely wrong in here. I sometimes _do_ get something back. root@amd:~# s2ram Switching from vt9 to vt1 switching back to vt9 root@amd:~# root@amd:~# root@amd:~# cd /sys/class/rtc/rtc0 root@amd:/sys/class/rtc/rtc0# ls date dev device@ name power/ since_epoch subsystem@ time uevent wakealarm root@amd:/sys/class/rtc/rtc0# cat wakealarm 2051629528 root@amd:/sys/class/rtc/rtc0# cat power/wakeup root@amd:/sys/class/rtc/rtc0# cat wakealarm 2051629528 root@amd:/sys/class/rtc/rtc0# date +%s 1190285030 root@amd:/sys/class/rtc/rtc0# echo 1190285050 > wakealarm root@amd:/sys/class/rtc/rtc0# s2ram Switching from vt9 to vt1 switching back to vt9 root@amd:/sys/class/rtc/rtc0# root@amd:/sys/class/rtc/rtc0# root@amd:/sys/class/rtc/rtc0# cat wakealarm root@amd:/sys/class/rtc/rtc0# cat wakealarm root@amd:/sys/class/rtc/rtc0# date +%s 1190285229 root@amd:/sys/class/rtc/rtc0# cat wakealarm root@amd:/sys/class/rtc/rtc0# Also, is there some documentation for wakealarm? sh-3.1$ cd Documentation/ sh-3.1$ grep -ri wakealarm . ...is it time in seconds? In UTC? In whatever timezone rtc clocks are using? It does not seem to work for me :-(. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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