man: Document ranges for distributions config files and local config files

Let's recommend that config files and drop-ins in /usr use the range
0-49 and config files in /etc and /run use the range 50-99 so that
files in /run and /etc will generally always override files from
/usr.
This commit is contained in:
Daan De Meyer 2024-01-24 12:24:11 +01:00 committed by Lennart Poettering
parent 368b2bccd3
commit 6811774510

View file

@ -35,7 +35,10 @@
packages) or <filename>/usr/local/lib/</filename> (local installs). Files in <filename>/etc/</filename>
are reserved for the local administrator, who may use this logic to override the configuration files
installed by vendor packages. It is recommended to prefix all filenames with a two-digit number and a
dash, to simplify the ordering of the files.</para>
dash, to simplify the ordering of the files. It is recommended to use the range 10-40 for configuration
files in <filename>/usr/</filename> and the range 60-90 for configuration files in
<filename>/etc/</filename> and <filename>/run/</filename>, to make sure that local and transient
configuration files will always take priority over configuration files shipped by the OS vendor.</para>
<para>If the administrator wants to disable a configuration file supplied by the vendor, the recommended
way is to place a symlink to <filename>/dev/null</filename> in the configuration directory in
@ -68,9 +71,12 @@
who may use this logic to override the configuration files installed by vendor packages. Drop-ins have to
be used to override package drop-ins, since the main configuration file has lower precedence. It is
recommended to prefix all filenames in those subdirectories with a two-digit number and a dash, to
simplify the ordering of the files. This also defined a concept of drop-in priority to allow
distributions to ship drop-ins within a specific range lower than the range used by users. This should
lower the risk of package drop-ins overriding accidentally drop-ins defined by users.</para>
simplify the ordering of the files. This also defines a concept of drop-in priorities to allow
OS vendors to ship drop-ins within a specific range lower than the range used by users. This should
lower the risk of package drop-ins overriding accidentally drop-ins defined by users. It is recommended
to use the range 10-40 for drop-ins in <filename>/usr/</filename> and the range 60-90 for drop-ins in
<filename>/etc/</filename> and <filename>/run/</filename>, to make sure that local and transient drop-ins
take priority over drop-ins shipped by the OS vendor.</para>
<para>To disable a configuration file supplied by the vendor, the recommended way is to place a symlink
to <filename>/dev/null</filename> in the configuration directory in <filename>/etc/</filename>, with the