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Groups > comp.os.linux.misc > #12649
| From | not.socialnetwork@gmail.com |
|---|---|
| Newsgroups | comp.os.linux.misc, comp.sys.raspberry-pi |
| Subject | Re: background processes (was HOW2 capture time of power-failure?) |
| Followup-To | comp.os.linux.misc, comp.sys.raspberry-pi |
| Date | 2014-11-08 03:32 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <m3k2rn$nlu$1@dont-email.me> (permalink) |
| References | <m3ikud$dvn$1@dont-email.me> |
Cross-posted to 2 groups.
Followups directed to: comp.os.linux.misc, comp.sys.raspberry-pi
In article <m3ikud$dvn$1@dont-email.me>, Joe Beanfish <joebeanfish@nospam.duh> wrote:
> On Thu, 06 Nov 2014 19:19:01 +0000, not.socialnetwork wrote:
> > For my application, I want the player to be the boss - to start the
> > timer.
> > For 'civilised' code, the player would also switch-off the timer, which
> > would have recorded to LastTimeStamp.
> > For my application: cutting the power automatically syncronises the
> > <playEnd> and last-TimeStamp.
> > ...
> > So the background timer would need to be started before the `play`.
>
> Correct. Something like this perhaps:
>
> #!/bin/sh
> while :;do date > TimeStamp;sleep 5;done &
> bgpid=$!
> StartPlay
> kill $bgpid
> rm -f TimeStamp
> ---
That seems to test GOOD on the live-PC.
I'll test by power-cut on rPi later.
JB.sh ==
#!/bin/sh
echo "IF State=Skip THEN PlayFrom(TimeStamp)"
echo -n "Previous TimeStamp="; cat TimeStamp
while :;do date > TimeStamp;sleep 5;done &
bgpid=$!
echo StartPlay;sleep 25
echo StillPlaying;sleep 25
echo "After Play stop: kill BakPID"
kill $bgpid
echo "TimeStamp is used by next Start/PowerUp:"
echo -n "Currently="
cat TimeStamp
exit 0
log of 2 consecutive runs ==
IF State=Skip THEN PlayFrom(TimeStamp)
Previous TimeStamp=Sat Nov 8 05:08:19 SAST 2014
StartPlay
StillPlaying
After Play stop: kill BakPID
TimeStamp is used by next Start/PowerUp:
Currently=Sat Nov 8 05:12:19 SAST 2014
./JB.sh: line 13: 20334 Terminated while :; do
date >TimeStamp; sleep 5;
done
===
IF State=Skip THEN PlayFrom(TimeStamp)
Previous TimeStamp=Sat Nov 8 05:12:19 SAST 2014
StartPlay
StillPlaying
After Play stop: kill BakPID
TimeStamp is used by next Start/PowerUp:
Currently=Sat Nov 8 05:13:57 SAST 2014
./JB.sh: line 13: 20360 Terminated while :; do
date >TimeStamp; sleep 5;
done
===
Thanks, I'll report the rPi live-test-results.
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HOW2 capture time of power-failure? not.socialnetwork@gmail.com - 2014-10-26 17:38 +0000
Re: HOW2 capture time of power-failure? Ian Malcolm <See.My.Sig.for.email@totally.invalid> - 2014-10-26 18:26 +0000
Re: HOW2 capture time of power-failure? not.socialnetwork@gmail.com - 2014-10-27 18:10 +0000
Re: HOW2 capture time of power-failure? Gordon Henderson <gordon+usenet@drogon.net> - 2014-10-27 18:29 +0000
Re: HOW2 capture time of power-failure? not.socialnetwork@gmail.com - 2014-10-28 21:26 +0000
Re: HOW2 capture time of power-failure? William Unruh <unruh@invalid.ca> - 2014-10-28 04:56 +0000
Re: HOW2 capture time of power-failure? Dom <domafp@blueyonder.co.uk> - 2014-10-28 06:29 +0000
Re: HOW2 capture time of power-failure? William Unruh <unruh@invalid.ca> - 2014-10-28 06:41 +0000
Re: HOW2 capture time of power-failure? not.socialnetwork@gmail.com - 2014-10-29 00:12 +0000
Re: HOW2 capture time of power-failure? William Unruh <unruh@invalid.ca> - 2014-10-26 19:23 +0000
Re: HOW2 capture time of power-failure? spam-no-spam@Freeola.net.invalid (Windmill) - 2014-11-04 13:19 +0000
Re: HOW2 capture time of power-failure? William Unruh <unruh@invalid.ca> - 2014-11-05 21:56 +0000
Re: HOW2 capture time of power-failure? Joe Beanfish <joebeanfish@nospam.duh> - 2014-11-06 14:12 +0000
Re: HOW2 capture time of power-failure? nba@users.sourceforge.net (Niels Baggesen) - 2014-11-06 16:15 +0100
Re: HOW2 capture time of power-failure? William Unruh <unruh@invalid.ca> - 2014-11-06 16:00 +0000
Re: HOW2 capture time of power-failure? spam-no-spam@Freeola.net.invalid (Windmill) - 2014-11-06 20:37 +0000
Re: HOW2 capture time of power-failure? Joe Beanfish <joebeanfish@nospam.duh> - 2014-11-06 14:13 +0000
Re: HOW2 capture time of power-failure? andrew@cucumber.demon.co.uk (Andrew Gabriel) - 2014-10-26 20:28 +0000
Re: HOW2 capture time of power-failure? Joe Beanfish <joebeanfish@nospam.duh> - 2014-10-27 13:17 +0000
Re: HOW2 capture time of power-failure? Jean-David Beyer <jeandavid8@verizon.net> - 2014-10-28 13:43 -0400
Re: HOW2 capture time of power-failure? Ant <ant@zimage.comANT> - 2014-10-29 08:18 -0700
Re: HOW2 capture time of power-failure? Joe Beanfish <joebeanfish@nospam.duh> - 2014-10-29 13:28 +0000
Re: HOW2 capture time of power-failure? not.socialnetwork@gmail.com - 2014-10-30 08:32 +0000
background processes (was HOW2 capture time of power-failure?) Joe Beanfish <joebeanfish@nospam.duh> - 2014-10-30 13:16 +0000
Re: background processes (was HOW2 capture time of power-failure?) not.socialnetwork@gmail.com - 2014-11-03 03:25 +0000
Re: background processes (was HOW2 capture time of power-failure?) "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2014-11-02 23:34 -0500
Re: background processes (was HOW2 capture time of power-failure?) William Unruh <unruh@invalid.ca> - 2014-11-03 08:25 +0000
Re: background processes (was HOW2 capture time of power-failure?) Martin Gregorie <martin@address-in-sig.invalid> - 2014-11-03 12:56 +0000
Re: background processes (was HOW2 capture time of power-failure?) not.socialnetwork@gmail.com - 2014-11-06 19:19 +0000
Re: background processes (was HOW2 capture time of power-failure?) Martin Gregorie <martin@address-in-sig.invalid> - 2014-11-07 02:36 +0000
Re: background processes (was HOW2 capture time of power-failure?) Joe Beanfish <joebeanfish@nospam.duh> - 2014-11-07 14:28 +0000
Re: background processes (was HOW2 capture time of power-failure?) not.socialnetwork@gmail.com - 2014-11-08 03:32 +0000
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