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Porting systemd To New Distributions
HOWTO:
You need to make the follow changes to adapt systemd to your
distribution:
0) Make your distribution recognized via the autoconf checks
in configure.ac. Grep for the word "fedora" (case
insensitively) and you should be able to find the places where
you need to add/change things.
1) Patch src/hostname-setup.c so that systemd knows where to
read your host name from. You might also want to update
status_welcome() in util.c.
2) Check the unit files in units/ if they match your
distribution. Most likely you will have to make additions to
units/*.m4 and create a copy of units/fedora/ with changes for
your distribution.
3) Adjust Makefile.am to register the unit files you added in
step 2. Also you might need to update the m4 invocation in
Makefile.am. Grep for the word "fedora" (case insensitively)
and you should be able to find the places where you need to
add/change things.
4) Try it out. Play around with 'systemd --test --system' for
a test run of systemd without booting. This will read the unit
files and print the initial transaction it would execute
during boot-up. This will also inform you about ordering loops
and suchlike.
CONTRIBUTING UPSTREAM:
We are interested in merging your changes upstream, if they
are for a big, and well-known distribution. Unfortunately we
don't have the time and resources to maintain
distribution-specific patches for all distributions on the
planet, hence please do not send us patches that add systemd
support for non-mainstream or niche distributions.
Thank you for understanding.
BE CONSIDERATE:
We'd like to keep differences between the distributions
minimal. This both simplifies our maintenance work, as well
as it helps administrators to move from one distribution to
another.
Hence we'd like to ask you to keep your changes minimal, and
not rename any units without a very good reason (if you need a
particular name for compatibility reasons, consider using
alias names via symlinks). Before you make changes that change
semantics from upstream, please talk to us!
In SysV almost every distribution uses a different
nomenclature and different locations for the boot-up
scripts. We'd like to avoid chaos like that with systemd right
from the beginning. So please, be considerate!
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