Bruno Melo wrote in
<g7EJelBCZlm3Y4JxNh1J9f2guqWnLrf9HljjW41O2j7QBQwl9bNtkSOAr3WNrbc1QwRGXSf\
brlg2YyD6USd_p8nbTai_GXUR-nk2dl_UlZs=@protonmail.com>:
|> I am Qingyao Sun, a student looking forward to participating in a GSoC
|> project for NetBSD this year. One project I am interested in is "Port
|> launchd" http://wiki.netbsd.org/projects/project/launchd-port/. I have
|> reached out to Christos Zoulas, the prospective mentor of that project, \
|> but
|> he said that replacing init/rc with launchd could be a little
|> controversial, and suggested me ask your opinions on the list.
|>
|
|I think non-controversials options are importing classic daemontools \
|or importing runit like Void Linux does. Relaunchd is a good idea, \
I personally use something scripted that polls periodically
instead (for most). It is pretty easy (most of the time), like
sshd__init() {
name=sshd
pid=/run/${name}.pid
prog=$(command -v ${name} 2>/dev/null)
}
sshd_start() {
sshd__init
if [ -f /root/hosts/${HOSTNAME}/sshd-ed25519 ]; then :; else
ssh-keygen -q -t ed25519 -N '' -f /root/hosts/${HOSTNAME}/sshd-ed25519
fi
eval ${ssd} --start --pidfile ${pid} --exec ${prog} -- ${SSHD_ARGS}
}
sshd_stop() { sshd__init; ${ssd} --stop --retry 10 --pidfile ${pid}; }
sshd_status() { sshd__init; daemons__stat_and_dog n; }
sshd_watchdog() { sshd__init; daemons__stat_and_dog y; }
where ssd is start-stop-daemon (of busybox, or Debian, where the
former complicates thinfs a bit; and namespace / unshare boxes do,
too).
I personally think UNIX should be as easy as the above.
runit is very interesting, but i think being able to redirect
deaths of daemonized programs to another process like init(8) is
a real improvement that Linux has with PR_SET_CHILD_SUBREAPER and
PR_SET_PDEATHSIG of prctl(2), and the FreeBSD approach is even
more fine-grained. But i personally again really admire
unshare(1) of Linux with CLONE_NEWPID.
I think what i mean is, isn't it better to have the possibilities
in the kernel to provide such, and then the freedom to use shell
scripts, than something like systemd?
|but need to be more stable to replace classic init. Launchd itself \
|is now closed source and full of Mach dependencies as far as I looked \
|the code, you would need to implement Mach microkernel as a kernel \
|module like NextBSD did and like previous NetBSD had. I still prefer \
|the daemontools or runit options (runit runs not being the PID1 too).
--End of <g7EJelBCZlm3Y4JxNh1J9f2guqWnLrf9HljjW41O2j7QBQwl9bNtkSOAr3WNrb\
c1QwRGXSfbrlg2YyD6USd_p8nbTai_GXUR-nk2dl_UlZs=@protonmail.com>
--steffen
|
|Der Kragenbaer, The moon bear,
|der holt sich munter he cheerfully and one by one
|einen nach dem anderen runter wa.ks himself off
|(By Robert Gernhardt)
