diff options
| -rw-r--r-- | man/systemctl.xml | 3 | ||||
| -rw-r--r-- | man/systemd.preset.xml | 4 | ||||
| -rw-r--r-- | man/systemd.unit.xml | 36 |
3 files changed, 29 insertions, 14 deletions
diff --git a/man/systemctl.xml b/man/systemctl.xml index 0ad0ad6d7e..78607c9ba3 100644 --- a/man/systemctl.xml +++ b/man/systemctl.xml @@ -1092,7 +1092,8 @@ kobject-uevent 1 systemd-udevd-kernel.socket systemd-udevd.service enabled and disabled, or only enabled, or only disabled.</para> <para>If the unit carries no install information, it will be silently ignored - by this command.</para> + by this command. <replaceable>NAME</replaceable> must be the real unit name, + any alias names are ignored silently.</para> <para>For more information on the preset policy format, see <citerefentry><refentrytitle>systemd.preset</refentrytitle><manvolnum>5</manvolnum></citerefentry>. diff --git a/man/systemd.preset.xml b/man/systemd.preset.xml index b7164014f0..d09167baaf 100644 --- a/man/systemd.preset.xml +++ b/man/systemd.preset.xml @@ -98,6 +98,10 @@ Empty lines and lines whose first non-whitespace character is # or ; are ignored.</para> + <para>Presets must refer to the "real" unit file, and not to any aliases. See + <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> + for a description of unit aliasing.</para> + <para>Two different directives are understood: <literal>enable</literal> may be used to enable units by default, <literal>disable</literal> to disable units by default.</para> diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml index 85a7b12d76..f818e772a9 100644 --- a/man/systemd.unit.xml +++ b/man/systemd.unit.xml @@ -144,21 +144,31 @@ <option>false</option> and <option>off</option> are equivalent.</para> - <para>Time span values encoded in unit files can be written in - various formats. A stand-alone number specifies a time in seconds. - If suffixed with a time unit, the unit is honored. A concatenation - of multiple values with units is supported, in which case the - values are added up. Example: "50" refers to 50 seconds; "2min - 200ms" refers to 2 minutes plus 200 milliseconds, i.e. 120200ms. - The following time units are understood: s, min, h, d, w, ms, us. - For details see + <para>Time span values encoded in unit files can be written in various formats. A stand-alone number specifies a + time in seconds. If suffixed with a time unit, the unit is honored. A concatenation of multiple values with units + is supported, in which case the values are added up. Example: <literal>50</literal> refers to 50 seconds; + <literal>2min 200ms</literal> refers to 2 minutes and 200 milliseconds, i.e. 120200 ms. The following time units + are understood: <literal>s</literal>, <literal>min</literal>, <literal>h</literal>, <literal>d</literal>, + <literal>w</literal>, <literal>ms</literal>, <literal>us</literal>. For details see <citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para> - <para>Empty lines and lines starting with # or ; are - ignored. This may be used for commenting. Lines ending - in a backslash are concatenated with the following - line while reading and the backslash is replaced by a - space character. This may be used to wrap long lines.</para> + <para>Empty lines and lines starting with <literal>#</literal> or <literal>;</literal> are ignored. This may be + used for commenting. Lines ending in a backslash are concatenated with the following line while reading and the + backslash is replaced by a space character. This may be used to wrap long lines.</para> + + <para>Units can be aliased (have an alternative name), by creating a symlink from the new name to the existing name + in one of the unit search paths. For example, <filename>systemd-networkd.service</filename> has the alias + <filename>dbus-org.freedesktop.network1.service</filename>, created during installation as the symlink + <filename>/usr/lib/systemd/system/dbus-org.freedesktop.network1.service</filename>. In addition, unit files may + specify aliases through the <varname>Alias=</varname> directive in the [Install] section; those aliases are only + effective when the unit is enabled. When the unit is enabled, symlinks will be created for those names, and removed + when the unit is disabled. For example, <filename>reboot.target</filename> specifies + <varname>Alias=ctrl-alt-del.target</varname>, so when enabled it will be invoked whenever CTRL+ALT+DEL is + pressed. Alias names may be used in commands like <command>enable</command>, <command>disable</command>, + <command>start</command>, <command>stop</command>, <command>status</command>, …, and in unit dependency directives + <varname>Wants=</varname>, <varname>Requires=</varname>, <varname>Before=</varname>, <varname>After=</varname>, …, + with the limitation that aliases specified through <varname>Alias=</varname> are only effective when the unit is + enabled. Aliases cannot be used with the <command>preset</command> command.</para> <para>Along with a unit file <filename>foo.service</filename>, the directory <filename>foo.service.wants/</filename> may exist. All |