Hi,
On 11/17/2014 04:24 PM, Roger Lynn wrote:
> On 17/11/2014 11:12, Whoopie wrote:
>> It looks like hdapsd doesn't terminate in time, it get's KILLed after
>> 30 seconds, see the do_stop() function in /etc/init.d/hdapsd:
>> start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile
>> $PIDFILE --name $NAME
>>
>> strace shows:
>> 17912 --- SIGTERM {si_signo=SIGTERM, si_code=SI_USER, si_pid=18045,
>> si_uid=0} ---
>> 17912 rt_sigaction(SIGTERM, {0x402cb0, [TERM], SA_RESTORER|SA_RESTART,
>> 0x7f779b2aec30}, {0x402cb0, [TERM], SA_RESTORER|SA_RESTART,
>> 0x7f779b2aec30}, 8) = 0
>> 17912 rt_sigreturn() = 0
>> 17912 read(3, <unfinished ...>
>> 17912 +++ killed by SIGKILL +++
This is
ret = read(freefall_fd, &count, sizeof(count));
line 1249 from hdapsd.c
>> Adding some debugging output, the SIGTERM handler is called, but the
>> while loop is not stopped, as the new "running" value doesn't find its
>> way into the main process. But here, my coding skills stop, sorry.
read() blocks until there is something to read from /dev/freefall.
> I started looking at this yesterday, but ran out of time. I assume the
> code is getting stuck in a loop or function call, which means it never
> returns to the main while loop in main(). This is slightly worrying: if
> the main loop is not running does that meant the hard disc protection is
> not working?
No, it should be working, because in the case the hardware logic detects
a fall, the read will unblock.
> Should the instructions at:
> https://www.debian.org/doc/manuals/debian-reference/ch12.en.html#_debugging_the_debian_package
> build me a package with debugging enabled?
Yes, but I do not think this is needed anymore as we have found our
problem and now just need a proper fix.
Regards
Evgeni
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