Sinit, a small static sysv-style init with services

Question

So yeah, one more init implementation. Because no way my systems will be running systemd.
https://github.com/arsv/sinit (tarball)
Key features:
* Runlevels for process management
* Starting and stopping individual processes manually: "telinit stop httpd" and so on
* Sleep/suspend/hibernate as runlevels
* Support for initdirs (one file per process) in addition to sysvinit inittab (one line per process)
* Small size, static linkage, dietlibc, no external dependencies
* Simplified memory management; no malloc, memory allocation only while reconfiguring
I've been re-thinking the design of common startup scripts, pm-utils, laptop-utils, and basically those ideas ended up as a base for sinit. And I needed replacement for sysvinit in my router, because having to edit inittab to stop a process was really annoying. And, of course, systemd.
This is how sinit inittab looks like:
# Environment for spawned processes
PATH=/bin:/sbin:/usr/bin
LOCALE=C
# System initialization
::wait:/sbin/mount -o remount,rw /
syslog:::/sbin/syslogd -n
::once:/sbin/hwlock -s
# VTs
su:1::/sbin/sulogin
tty1:2345::/sbin/agetty --noclear -8 -s 38400 tty1 linux
tty2:2345::/sbin/agetty -8 -s 38400 tty2 linux
# Service directory
@2345:/etc/rc
# Sleep
:8:wait:/sbin/sleep-hooks
:8:wait:!echo mem > /sys/power/state
:~8:wait:/sbin/wakeup-hooks
Service file, /etc/rc/httpd (note @ line in inittab):
#!/bin/sh
#::log
# The equivalent initline is
# httpd:2345:log:!/sbin/httpd
exec /sbin/httpd
Telinit:
telinit q
telinit stop httpd
telinit start httpd
telinit poweroff
telinit sleep
Unlike other minimalistic init implementations (well, minit and derivatives), sinit is not really minimalistic as far as features go.
It is more like an extended sysvinit derivative, despite being significantly smaller than sysvinit.
As usual, it's a work-in-progress, so future changes are possible.
At present it should be usable, so anyone interested is welcome to try it.
Not related to this sinit. Oh my. Talk about name collision.
Last edited by axs (2014-03-02 21:20:46)

Answer 1

rebootl wrote:
Wow, it's raining inits big_smile
But as you realized already, the name collision is quite bad.
You name it
As for the name maybe svinit since it's sysv-style and it seems to have some supervise capabilities could be read as this as well...
There is already an svinit. Maybe call it rinit because sleep, suspend and hibernate are runlevels?