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udev,network: use standard paths for .network and .link files

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This centralizes the configuration to one header file.
/usr/local/lib is now included in the search list, and documentation is
updated accordingly.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek
2019-02-18 10:29:33 +01:00
parent eb5f4dde96
commit dc0d407851
7 changed files with 29 additions and 45 deletions
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man/systemd.network.xml
+12 -14
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@@ -37,17 +37,17 @@
<para>The main network file must have the extension <filename>.network</filename>; other
extensions are ignored. Networks are applied to links whenever the links appear.</para>
<para>The <filename>.network</filename> files are read from the files located in the system
network directory <filename>/usr/lib/systemd/network</filename>, the volatile runtime network
directory <filename>/run/systemd/network</filename> and the local administration network
directory <filename>/etc/systemd/network</filename>. All configuration files are collectively
sorted and processed in lexical order, regardless of the directories in which they live.
However, files with identical filenames replace each other. Files in <filename>/etc</filename>
have the highest priority, files in <filename>/run</filename> take precedence over files with
the same name in <filename>/usr/lib</filename>. This can be used to override a system-supplied
configuration file with a local file if needed. As a special case, an empty file (file size 0)
or symlink with the same name pointing to <filename>/dev/null</filename> disables the
configuration file entirely (it is "masked").</para>
<para>The <filename>.network</filename> files are read from the files located in the system network
directories <filename>/usr/lib/systemd/network</filename> and
<filename>/usr/local/lib/systemd/network</filename>, the volatile runtime network directory
<filename>/run/systemd/network</filename> and the local administration network directory
<filename>/etc/systemd/network</filename>. All configuration files are collectively sorted and processed
in lexical order, regardless of the directories in which they live. However, files with identical
filenames replace each other. Files in <filename>/etc</filename> have the highest priority, files in
<filename>/run</filename> take precedence over files with the same name under
<filename>/usr</filename>. This can be used to override a system-supplied configuration file with a local
file if needed. As a special case, an empty file (file size 0) or symlink with the same name pointing to
<filename>/dev/null</filename> disables the configuration file entirely (it is "masked").</para>
<para>Along with the network file <filename>foo.network</filename>, a "drop-in" directory
<filename>foo.network.d/</filename> may exist. All files with the suffix
@@ -60,9 +60,7 @@
<filename>/run/systemd/network</filename> directories. Drop-in files in
<filename>/etc</filename> take precedence over those in <filename>/run</filename> which in turn
take precedence over those in <filename>/usr/lib</filename>. Drop-in files under any of these
directories take precedence over the main netdev file wherever located. (Of course, since
<filename>/run</filename> is temporary and <filename>/usr/lib</filename> is for vendors, it is
unlikely drop-ins should be used in either of those places.)</para>
directories take precedence over the main netdev file wherever located.</para>
<para>Note that an interface without any static IPv6 addresses configured, and neither DHCPv6
nor IPv6LL enabled, shall be considered to have no IPv6 support. IPv6 will be automatically