* s6 supervision
@ 2021-01-29 5:47 billa chaitanya
2021-01-29 8:18 ` Colin Booth
0 siblings, 1 reply; 2+ messages in thread
From: billa chaitanya @ 2021-01-29 5:47 UTC (permalink / raw)
To: supervision
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Hi Team,
Is there an API/ command in s6 code to get the information of a process and
its pid by giving the service name that has started the process?
And does s6-svscan/s6-supervise have the knowledge of service-name&
process name & process pid so that it can be fetched to another process
using IPC?
Thanks,
Chaitanya
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: s6 supervision
2021-01-29 5:47 s6 supervision billa chaitanya
@ 2021-01-29 8:18 ` Colin Booth
0 siblings, 0 replies; 2+ messages in thread
From: Colin Booth @ 2021-01-29 8:18 UTC (permalink / raw)
To: supervision
On Fri, Jan 29, 2021 at 11:17:00AM +0530, billa chaitanya wrote:
> Hi Team,
>
> Is there an API/ command in s6 code to get the information of a process and
> its pid by giving the service name that has started the process?
>
I might be misreading your question but s6-svstat /path/to/servicedir I
believe answers your question, at least as far as reading what
s6-supervise knows about (pid, status, time in status, a few other
details). If you're on a system with a functional procfs you can then
use the pid to query most information from /proc/$pid.
>
> And does s6-svscan/s6-supervise have the knowledge of service-name&
> process name & process pid so that it can be fetched to another process
> using IPC?
>
s6-supervise knows the process id of its primary child and as I
mentioned above you can ask it for that information via s6-svstat. It
does not know anything else about the process because it doesn't need
to. However, there are several options to s6-svstat that make output
information in easy-to-parse formats which make follow-on queries to
/proc trivial.
--
Colin Booth
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