ubus running key status

[Paul D]

On 2024-02-29 12:56, Ravi Paluri (QUIC) wrote:
> Thanks, Paul for the reply.
> Can you help us with a sample usage of "ubus subscribe" OR "ubus listen" OR "ubus monitor", which helps us to learn, "running" flag change to false from true.
> 


I know not whether such is even possible. Start here: 
https://git.openwrt.org/project/ubus.git

> We are polling the status of "running" flag as below.
> ubus call service list '{"name":"test*.init","verbose":"True"}' | grep -i \"running\"

Is * even supposed to work?
this shows the unetd instance:

ubus call service list '{"name":"unetd"}'

this does not:

ubus call service list '{"name":"unet*"}'



ubus call service list '{"name":"unetd"}' | jsonfilter -q -e 
"@['unetd'].instances[*].running"

returns simply: true



> This is working when script execution takes some time.
> For some scripts that take very less time (for e.g, a single instruction such as "uci set .."), we are not able to detect the transition of "running" flag to false from true as the flag changes it's value quickly.

How about using the return code of the script?

> 
> Thanks,
> Ravi
> -----Original Message-----
> From: openwrt-devel <openwrt-devel-bounces at lists.openwrt.org> On Behalf Of Paul D
> Sent: Friday, February 23, 2024 7:35 PM
> To: openwrt-devel at lists.openwrt.org
> Subject: Re: ubus running key status
> 
> WARNING: This email originated from outside of Qualcomm. Please be wary of any links or attachments, and do not enable macros.
> 
> On 2024-02-23 13:43, Ravi Paluri (QUIC) wrote:
>> Can you let us know, is there a way to get a notification when the "running" key value moves to "false" from "true"?
>> OR is there any ubus API to which we can register a callback, which will then be invoked when the execution is complete?
> 
> Not certain about callbacks - but there is "ubus monitor" "ubus subscribe" "ubus listen" and "ubus wait_for"
> 
> They're blocking calls, at least.
> 
>