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maggie

Member

Registered: 2011-02-12

Posts: 255

Need to delay the start of a script with systemd

I want to run /usr/local/bin/myscript from systemd as a oneshot but I want to have the service file I create wait 10 sec before it runs that. I can add a sleep 10s to my script itself but wanted to know if there is a proper way to do it within systemd. I did not find the answer in the man pages.

sistematico

Member

From: Campo Grande / MS / Brasil

Registered: 2008-07-26

Posts: 97

Website

Re: Need to delay the start of a script with systemd

https://bbs.archlinux.org/viewtopic.php … 6#p1310606

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WonderWoofy

Member

From: Los Gatos, CA

Registered: 2012-05-19

Posts: 8,414

Re: Need to delay the start of a script with systemd

I want to run /usr/local/bin/myscript from systemd as a oneshot but I want to have the service file I create wait 10 sec before it runs that. I can add a sleep 10s to my script itself but wanted to know if there is a proper way to do it within systemd. I did not find the answer in the man pages.

What does the script do?  Or I guess, more importantly, what is the 10 second delay waiting for?

If you just want to have it wait a bit before it runs, you can use a systemd.timer unit to achieve this.  But if you are waiting for a particular device to show up and be ready, I think you would want to use BindsTo=sys-devices-whatever-thing.device (or possibly After=sys-device-whatever-thing.device).

qinohe

Member

From: Netherlands

Registered: 2012-06-20

Posts: 1,496

Re: Need to delay the start of a script with systemd

I did not find the answer in the man pages.

Hi, have a look at 'man systemd.service'  and specifically  'man systemd.service|grep -A 1000 TimeoutStartSec='
Should do the trick..

falconindy

Developer

From: New York, USA

Registered: 2009-10-22

Posts: 4,111

Website

Re: Need to delay the start of a script with systemd

I did not find the answer in the man pages.

Hi, have a look at 'man systemd.service'  and specifically  'man systemd.service|grep -A 1000 TimeoutStartSec='
Should do the trick..

No, no it does not. This is about how long systemd will wait for a service to finish startup, not about delaying it.

OP is asking an XY question.

Last edited by falconindy (2014-08-11 12:18:35)

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emeres

Member

Registered: 2013-10-08

Posts: 1,570

Re: Need to delay the start of a script with systemd

@maggie You can use a timer for that. OnActiveSec is the directive. The timer file should be executed by systemctl or services you want it to, and after the time specified it will start the service. For more information check 'man systemd.timer'.

Trilby

Inspector Parrot

Registered: 2011-11-29

Posts: 30,330

Website

Re: Need to delay the start of a script with systemd

OP is asking an XY question.

Indeed.  Maggie, how about telling is what "myscript" is and why you think it needs to wait 10 seconds?  Is 10 seconds just a guess or an estimate of how long it takes for the conditions required for your script to be ready?  If so, you'll never know when that guess will not be quite right.  I suspect you should be using service file Requires and/or After directives.

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"UNIX is simple and coherent" - Dennis Ritchie; "GNU's Not Unix" - Richard Stallman

qinohe

Member

From: Netherlands

Registered: 2012-06-20

Posts: 1,496

Re: Need to delay the start of a script with systemd

I did not find the answer in the man pages.

Hi, have a look at 'man systemd.service'  and specifically  'man systemd.service|grep -A 1000 TimeoutStartSec='
Should do the trick..

No, no it does not. This is about how long systemd will wait for a service to finish startup, not about delaying it.

OP is asking an XY question.

I have completely misinterpreted that part of the man page, thanks for pointing me at it.