diff options
Diffstat (limited to 'man/systemd.socket.xml')
| -rw-r--r-- | man/systemd.socket.xml | 46 |
1 files changed, 42 insertions, 4 deletions
diff --git a/man/systemd.socket.xml b/man/systemd.socket.xml index 410886f841..beac053bf0 100644 --- a/man/systemd.socket.xml +++ b/man/systemd.socket.xml @@ -134,6 +134,40 @@ </refsect1> <refsect1> + <title>Automatic Dependencies</title> + + <para>Socket units automatically gain a <varname>Before=</varname> + dependency on the service units they activate.</para> + + <para>Socket units referring to file system paths (such as AF_UNIX + sockets or FIFOs) implicitly gain <varname>Requires=</varname> and + <varname>After=</varname> dependencies on all mount units + necessary to access those paths.</para> + + <para>Socket units using the <varname>BindToDevice=</varname> + setting automatically gain a <varname>BindsTo=</varname> and + <varname>After=</varname> dependency on the device unit + encapsulating the specified network interface.</para> + + <para>If <varname>DefaultDependencies=yes</varname> is set (the + default), socket units automatically gain a + <varname>Before=</varname> dependency on + <filename>sockets.target</filename>. They also gain a pair of + <varname>After=</varname> and <varname>Requires=</varname> + dependency on <filename>sysinit.target</filename>, and a pair of + <varname>Before=</varname> and <varname>Conflicts=</varname> + dependencies on <filename>shutdown.target</filename>. These + dependencies ensure that the socket unit is started before normal + services at boot, and is stopped on shutdown.</para> + + <para>Additional implicit dependencies may be added as result of + execution and resource control parameters as documented in + <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry> + and + <citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para> + </refsect1> + + <refsect1> <title>Options</title> <para>Socket files must include a [Socket] section, which carries @@ -309,12 +343,14 @@ <listitem><para>Specifies a network interface name to bind this socket to. If set, traffic will only be accepted from the specified network interfaces. This controls the - SO_BINDTODEVICE socket option (see - <citerefentry project='man-pages'><refentrytitle>socket</refentrytitle><manvolnum>7</manvolnum></citerefentry> + SO_BINDTODEVICE socket option (see <citerefentry + project='man-pages'><refentrytitle>socket</refentrytitle><manvolnum>7</manvolnum></citerefentry> for details). If this option is used, an automatic dependency from this socket unit on the network interface device unit (<citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry> - is created.</para></listitem> + is created. Note that setting this parameter might result in + additional dependencies to be added to the unit (see + above).</para></listitem> </varlistentry> <varlistentry> @@ -719,7 +755,9 @@ with <varname>Accept=no</varname>. It defaults to the service that bears the same name as the socket (with the suffix replaced). In most cases, it should not be necessary to use - this option.</para></listitem> + this option. Note that setting this parameter might result in + additional dependencies to be added to the unit (see + above).</para></listitem> </varlistentry> <varlistentry> |