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-
- This directory contains the source code for a tiny init devised for
- the Pygos system.
-
- The main goal of this project is to create a simple framework for:
- - system boot up and initialization
- - service supervision
-
- With the additional aims of having something that:
- - simply works
- - is easy to understand
- - is easy to configure and maintain
-
-
- The init process is intended to run on top of Linux and makes use of some
- Linux specific features (e.g. signalfd), but if sufficient interest exists,
- it should still be possible to make it run on some BSDs or whatever else.
-
- The init system tries to mimic the concept of unit files from systemd as
- those were considered to be a good design choice.
-
- Right now, the system is in a "basically works" proof of concept stage and
- needs some more work to become usable.
-
- There are plans for *maybe* *eventually* adding support for Linux name
- spaces, seccomp filters and cgroups as needed in the medium future.
-
-
- There are already a bunch of similar projects out there that have been
- considered for use in the Pygos system. The reason for starting a new
- one was mainly dissatisfaction with the existing ones. Other Projects
- that have been considered include:
-
- - systemd
- Contains a lot of good ideas, but it is HUGE. It has tons of
- dependencies. It implements tons of things that it simply shouldn't.
- It has a horrid, "modern", python based, hipster build system.
- It's simply too damn large and complex.
-
- - SystemV init
- A bad combination of unnecessary complexity where it isn't needed and a
- complete lack of abstraction where it would be needed. Shell script
- copy and paste madness. There are reasons people started developing
- alternatives (other than "hurr-durr-parallel-boots").
-
- - upstart
- Seems nice overall, but needlessly big and complex for the intended
- use case in Pygos. Would have needlessly added D-Bus to the system.
-
- - OpenRC
- Was already integrated into Pygos. Things turned out to be broken.
- Upstream developers did not accept fixes (after ignoring them for weeks
- and preferring typo fixes instead). Complaints from other people who
- tried to contribute fixes were observed on Github. Complaints from
- package maintainers about deteriorating code quality were observed
- on the official IRC channel. Documentation is non-existent.
-
- - daemontools and similar (runnit, s6, minit, ...)
- The sixties are over. And even code from that era is more readable. The
- source code for those projects should better be tossed out the window and
- rewritten from scratch. If you are a first semester CS student and you
- hand something like this in as a homework, the best you might get is a
- well deserved slap on the back of your head.
-
- - busybox init
- Nice and simple. Probably the best fit if the rest of your user space is
- busybox as well.
-