21 Jul
2015
21 Jul
'15
11:55 a.m.
Hey hey everyone,
is there a way to do it? I tried, but didnt get any sound. I suspect, that
cron doesn't use the user, who defined the task to be run?
My system is Debian Squeeze, my JACK is 0.121.3 . My scheduler is anacron
version 2.3. JACK applications normally run just fine under my user.
any hints and suggestions are welcome and appreciated! Thank you!
Ta-ta
----
Ffanci
* Homepage: https://freeshell.de/~silvain
* Twitter: http://twitter.com/ffanci_silvain
* GitHub: https://github.com/fsilvain
21 Jul
21 Jul
4:33 p.m.
On Tue, July 21, 2015 1:16 am, F. Silvain wrote:
is there a way to do it? I tried, but didnt get any
sound. I suspect, that
cron doesn't use the user, who defined the task to be run?
According to the crontab man page, there should be a crontab file per
user, and the tasks will be run as the user who owns the crontab:
A crontab file contains instructions to the cron(8) daemon of the general
form: "run this command at this time on this date". Each user has their
own crontab, and commands in any given crontab will be executed as the
user who owns the crontab.
My system is Debian Squeeze, my JACK is 0.121.3 .
My scheduler is anacron
This is in the "Disadvantages" paragraph in the Wikipedia description of
anacron:
Only the system administrator can configure anacron tasks. In contrast,
cron allows non-admin users to configure scheduled tasks.
Probably you will have to go to the Debian user group to find distribution
specific advice, but my first guess is that you could either replace
anacron with something like cronie which has the original behavior of
allowing per user crontab files, or you could try to make anacron run a
shell script, and that shell script executed something like su fsilvain -c
"jack_program"
--
Chris Caudle
5:07 p.m.
On Tue, 21 Jul 2015, Chris Caudle wrote:
So far as I know anacron uses cron, so if you have one you have the
other... at least with my ubuntustudio setup that is true.
My question becomes why stop jack? I run jack 24/7 here with no problems.
I have done so for over 2 years now. Pulse audio sees jack as it's audio
interface and jack allows changing latency as it runs (well jack 2 does
for sure, but I have not seen anything that says jack1 doesn't). If I
lower the latency past what pulse deals well with, I unload the pulse
bridge and pulse "quietly" uses it's dummy sink till I reload the bridge.
Pulse uses very little cpu in this mode... even less if you don't stream
audio at it.
--
Len Ovens
www.ovenwerks.net
On Tue, July 21, 2015 1:16 am, F. Silvain wrote:
That is my understanding as well. The user just types crontab -e to edit
their crontab.
is there a way to do it? I tried, but didnt get
any sound. I suspect, that
cron doesn't use the user, who defined the task to be run?
According to the crontab man page, there should be a crontab file per
user, and the tasks will be run as the user who owns the crontab:
A crontab file contains instructions to the cron(8) daemon of the general
form: "run this command at this time on this date". Each user has their
own crontab, and commands in any given crontab will be executed as the
user who owns the crontab. My system is Debian Squeeze, my JACK is 0.121.3
.
My scheduler is anacron
This is in the "Disadvantages" paragraph in the Wikipedia description of
anacron:
Only the system administrator can configure anacron tasks. In contrast,
cron allows non-admin users to configure scheduled tasks. 
5:11 p.m.
On 21 July 2015 at 16:32, Chris Caudle <chris(a)chriscaudle.org> wrote:
On Tue, July 21, 2015 1:16 am, F. Silvain wrote:
Might run as other users if you prepend something like "su - username
&& " to whatever you tell anacron to run?
Arve
My system is Debian Squeeze, my JACK is 0.121.3
.
My scheduler is anacron
This is in the "Disadvantages" paragraph in the Wikipedia description of
anacron:
Only the system administrator can configure anacron tasks. In contrast,
cron allows non-admin users to configure scheduled tasks.
5:38 p.m.
Hi,
On 21 July 2015 at 07:16, F. Silvain <silvain(a)freeshell.de> wrote:
Hey hey everyone,
is there a way to do it? I tried, but didnt get any sound. I suspect, that
cron doesn't use the user, who defined the task to be run?
This may not be because of a different user but down to the fact that
cron runs under a more limited environment - eg. limited path,
environment variables not set, no X, etc.
ie.
http://serverfault.com/questions/337631/crontab-execution-doesnt-have-the-s…
I had some fun setting up an interactive audio installation some time
ago that ran off cron(*) in a shed for 4 years ... *in fact, may have
given up and used another solution in the end .. can't remember .. had
a sleep since then ;-)
Good luck with it!
Neil
--
Neil C Smith
Artist : Technologist : Adviser
http://neilcsmith.net
Praxis LIVE - hybrid visual IDE for live creative coding - www.praxislive.org
Digital Prisoners - interactive spaces and projections -
www.digitalprisoners.co.uk
5:51 p.m.
On 07/21/2015 08:16 AM, F. Silvain wrote:
Hey hey everyone,
is there a way to do it? I tried, but didnt get any sound. I suspect,
that cron doesn't use the user, who defined the task to be run?
My system is Debian Squeeze, my JACK is 0.121.3 . My scheduler is
anacron version 2.3. JACK applications normally run just fine under my
user.
any hints and suggestions are welcome and appreciated! Thank you!
You might want to try to uncomment the following line in /etc/pam.d/su:
# session required pam_limits.so
Jeremy
Ta-ta
----
Ffanci
* Homepage: https://freeshell.de/~silvain
* Twitter: http://twitter.com/ffanci_silvain
* GitHub: https://github.com/fsilvain
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6:49 p.m.
Hey hey all,
thank you for your quick and ready answers. With some skulduggery I managed my
problem. It must have been a user issue after all, since it worked, when using
su .
Thank you once more!wq!
Ta-ta
----
Ffanci
* Homepage: https://freeshell.de/~silvain
* Twitter: http://twitter.com/ffanci_silvain
* GitHub: https://github.com/fsilvain
7:22 p.m.
Ralf Mardorf, Jul 21 2015:
On Tue, 21 Jul 2015 18:58:35 +0200, Jeremy Jongepier
wrote:
Oops, that shouldn't have happened, but thanks for the
tips. :)
...
Ta-ta
----
Ffanci
* Homepage: https://freeshell.de/~silvain
* Twitter: http://twitter.com/ffanci_silvain
* GitHub: https://github.com/fsilvain
On 07/21/2015 06:49 PM, F. Silvain wrote:
wq!
:x! is faster ;)
^o ^x is relaxing :p 
7:37 p.m.
On Tue, 21 Jul 2015 19:22:33 +0200 (CEST), F. Silvain wrote:
Ralf Mardorf, Jul 21 2015:
> On Tue, 21 Jul 2015 18:58:35 +0200, Jeremy Jongepier wrote:
>> On 07/21/2015 06:49 PM, F. Silvain wrote:
>> wq!
>>
>> :x! is faster ;)
>
> ^o ^x is relaxing :p
^^^^^ You are aware that I'm using another editor
;)? I'm kidding,
this works for nano, not for vi(m).
Oops, that shouldn't have happened, but thanks for
the tips. :)
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10 comments
7 participants
participants (7)
-
Arve Barsnes -
Chris Caudle -
F. Silvain -
Jeremy Jongepier -
Len Ovens -
Neil C Smith -
Ralf Mardorf