diff options
Diffstat (limited to 'man/systemd.device.xml')
| -rw-r--r-- | man/systemd.device.xml | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/man/systemd.device.xml b/man/systemd.device.xml index 255ca3373b..596d334d5d 100644 --- a/man/systemd.device.xml +++ b/man/systemd.device.xml @@ -26,11 +26,10 @@ <refsect1> <title>Description</title> - <para>A unit configuration file whose name ends in - <literal>.device</literal> encodes information about a device unit - as exposed in the - sysfs/<citerefentry><refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum></citerefentry> - device tree.</para> + <para>A unit configuration file whose name ends in <literal>.device</literal> encodes information about a + device unit as exposed in the + sysfs/<citerefentry><refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum></citerefentry> device + tree. This may be used to define dependencies between devices and other units.</para> <para>This unit type has no specific options. See <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> @@ -40,14 +39,10 @@ sections. A separate [Device] section does not exist, since no device-specific options may be configured.</para> - <para>systemd will dynamically create device units for all kernel - devices that are marked with the "systemd" udev tag (by default - all block and network devices, and a few others). This may be used - to define dependencies between devices and other units. To tag a - udev device, use <literal>TAG+="systemd"</literal> in the udev - rules file, see - <citerefentry><refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum></citerefentry> - for details.</para> + <para>systemd will dynamically create device units for all kernel devices that are marked with the + <literal>systemd</literal> udev tag (by default all block and network devices, and a few others). Note + that <emphasis>if <filename>systemd-udev.service</filename> is not running, no device units will be + available (for example in a typical container)</emphasis>.</para> <para>Device units are named after the <filename>/sys/</filename> and <filename>/dev/</filename> paths they control. Example: the @@ -57,6 +52,10 @@ name see <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para> + <para>To tag a udev device, use <literal>TAG+="systemd"</literal> in the udev rules file, see + <citerefentry><refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum></citerefentry> for details. + </para> + <para>Device units will be reloaded by systemd whenever the corresponding device generates a <literal>changed</literal> event. Other units can use <varname>ReloadPropagatedFrom=</varname> to react |