Colin Booth:
As documented here: https://www.skarnet.org/software/s6/s6-svstat.html
s6-svstat -p /path/to/service | xargs kill SIGNAL
You can thank Jos Backus for similar functionality in the nosh toolset
since 2013, with program-readable output that one can use existing tools
to pull arbitrary fields from.
% svshow --json /var/sv/* 2>/dev/null | jq '."/var/sv/bcron-sched".MainPID'
1861
% svshow --json /var/sv/* 2>/dev/null | jq
'."/var/sv/bcron-sched".RunTimestamp'
4611686019976326000
% svshow --json /var/sv/* 2>/dev/null | jq
'."/var/sv/bcron-sched".DaemontoolsEncoreState'
"running"
% svshow --json /var/sv/* 2>/dev/null | jq
'."/var/sv/bcron-sched"."Wanted-By"'
[
"/etc/service-bundles/targets/server"
]
%
