systemd/man/systemd.kill.xml

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<refentry id="systemd.kill">
        <refentryinfo>
                <title>systemd.kill</title>
                <productname>systemd</productname>

                <authorgroup>
                        <author>
                                <contrib>Developer</contrib>
                                <firstname>Lennart</firstname>
                                <surname>Poettering</surname>
                                <email>lennart@poettering.net</email>
                        </author>
                </authorgroup>
        </refentryinfo>

        <refmeta>
                <refentrytitle>systemd.kill</refentrytitle>
                <manvolnum>5</manvolnum>
        </refmeta>

        <refnamediv>
                <refname>systemd.kill</refname>
                <refpurpose>Kill environment configuration</refpurpose>
        </refnamediv>

        <refsynopsisdiv>
                <para><filename><replaceable>service</replaceable>.service</filename>,
                <filename><replaceable>socket</replaceable>.socket</filename>,
                <filename><replaceable>mount</replaceable>.mount</filename>,
                <filename><replaceable>swap</replaceable>.swap</filename></para>
        </refsynopsisdiv>

        <refsect1>
                <title>Description</title>

                <para>Unit configuration files for services, sockets,
                mount points and swap devices share a subset of
                configuration options which define the process killing
                parameters of spawned processes.</para>

                <para>This man page lists the configuration options
                shared by these four unit types. See
                <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
                for the common options of all unit configuration
                files, and
                <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                <citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                <citerefentry><refentrytitle>systemd.swap</refentrytitle><manvolnum>5</manvolnum></citerefentry>
                and
                <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
                for more information on the specific unit
                configuration files. The execution specific
                configuration options are configured in the [Service],
                [Socket], [Mount], or [Swap] section, depending on the unit
                type.</para>
        </refsect1>

        <refsect1>
                <title>Options</title>

                <variablelist class='unit-directives'>

                        <varlistentry>
                                <term><varname>KillMode=</varname></term>
                                <listitem><para>Specifies how
                                processes of this service shall be
                                killed. One of
                                <option>control-group</option>,
                                <option>process</option>,
                                <option>none</option>.</para>

                                <para>If set to
                                <option>control-group</option>, all
                                remaining processes in the control
                                group of this unit will be terminated
                                on unit stop (for services: after the
                                stop command is executed, as
                                configured with
                                <varname>ExecStop=</varname>). If set
                                to <option>process</option>, only the
                                main process itself is killed. If set
                                to <option>none</option>, no process is
                                killed. In this case only the stop
                                command will be executed on unit
                                stop, but no process be killed
                                otherwise. Processes remaining alive
                                after stop are left in their control
                                group and the control group continues
                                to exist after stop unless it is
                                empty. Defaults to
                                <option>control-group</option>.</para>

                                <para>Processes will first be
                                terminated via
                                <constant>SIGTERM</constant> (unless
                                the signal to send is changed via
                                <varname>KillSignal=</varname>). Optionally,
                                this is immediately followed by a
                                <constant>SIGHUP</constant> (if
                                enabled with
                                <varname>SendSIGHUP=</varname>). If
                                then, after a delay (configured via the
                                <varname>TimeoutStopSec=</varname> option),
                                processes still remain, the
                                termination request is repeated with
                                the <constant>SIGKILL</constant>
                                signal (unless this is disabled via
                                the <varname>SendSIGKILL=</varname>
                                option). See
                                <citerefentry><refentrytitle>kill</refentrytitle><manvolnum>2</manvolnum></citerefentry>
                                for more
                                information.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><varname>KillSignal=</varname></term>
                                <listitem><para>Specifies which signal
                                to use when killing a
                                service. Defaults to <constant>SIGTERM</constant>.
                                </para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><varname>SendSIGHUP=</varname></term>
                                <listitem><para>Specifies whether to
                                send <constant>SIGHUP</constant> to
                                remaining processes immediately after
                                sending the signal configured with
                                <varname>KillSignal=</varname>. This
                                is useful to indicate to shells and
                                shell-like programs that their
                                connection has been severed. Takes a
                                boolean value. Defaults to "no".
                                </para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><varname>SendSIGKILL=</varname></term>
                                <listitem><para>Specifies whether to
                                send <constant>SIGKILL</constant> to remaining processes
                                after a timeout, if the normal
                                shutdown procedure left processes of
                                the service around. Takes a boolean
                                value. Defaults to "yes".
                                </para></listitem>
                        </varlistentry>

                </variablelist>
        </refsect1>

        <refsect1>
                  <title>See Also</title>
                  <para>
                          <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
                          <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
                          <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
                          <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                          <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                          <citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                          <citerefentry><refentrytitle>systemd.swap</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                          <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                          <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                          <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
                  </para>
        </refsect1>

</refentry>