Skip to content
glaucus

Finit

  • Replaces s6 and s6-rc
  • finit version 4 is different and not compatible with 3.2
  • Long-run services are in finit.conf
  • Oneshots are in rc.local
  • finit probes all installed device managers so never have two installed
  • Fallback shell shouldn’t be used in production systems
  • It is recommended to enable auto reload
  • There are usually six levels that usually represent specific states of the system:
0 shutdown/halt
S/s/1 single-user, possibly all the same, possibly all mildly different, possibly only 1 exists
(s is n't a runlevel internally; it tells init "go to 1 but also do this specific thing")
used as a "everyone keep out while I fix low-level stuff" mode
2 multi-user mode, no networking (or same as 3)
3 graphical multi-user mode
4 not used (or same as 3)
5 multi-user mode graphical interface (or same as 3)
6 reboot
everything else is aliased to 3
  • In systemd you may find:
runlevel0.target is a link to poweroff.target
runlevel1.target is a link to rescue.target
runlevel2.target is a link to multi-user.target
runlevel3.target is a link to multi-user.target
runlevel4.target is a link to multi-user.target
runlevel5.target is a link to graphical.target
runlevel6.target is a link to reboot.target
  • Instructions for install on Alpine:
echo "/sbin/finit           - PID 1"
echo "/lib/finit/plugins/*  - All enabled Finit plugins"
echo "/etc/finit.conf       - Finit configuration file"
echo "/etc/finit.d/         - Finit services"
  • /bin/sh is run if no ttys are configured in /etc/finit.conf
  • By default all services, tasks, run commands and TTYs listed without a set of runlevels get a default set [234] assigned

References

Section titled “References”