main process of the service. systemd will proceed with starting follow-up units as soon as the parent
process exits.</para></listitem>
- <listitem><para>Behavior of <option>oneshot</option> is similar to <option>simple</option>; however, the
- service manager will consider the unit started after the main process exits. It will then start follow-up
- units. <varname>RemainAfterExit=</varname> is particularly useful for this type of
- service. <varname>Type=</varname><option>oneshot</option> is the implied default if neither
- <varname>Type=</varname> nor <varname>ExecStart=</varname> are specified.</para></listitem>
+ <listitem><para>Behavior of <option>oneshot</option> is similar to <option>simple</option>;
+ however, the service manager will consider the unit up after the main process exits. It will then
+ start follow-up units. <varname>RemainAfterExit=</varname> is particularly useful for this type
+ of service. <varname>Type=</varname><option>oneshot</option> is the implied default if neither
+ <varname>Type=</varname> nor <varname>ExecStart=</varname> are specified. Note that if this
+ option is used without <varname>RemainAfterExit=</varname> the service will never enter
+ <literal>active</literal> unit state, but directly transition from <literal>activating</literal>
+ to <literal>deactivating</literal> or <literal>dead</literal> since no process is configured that
+ shall run continously. In particular this means that after a service of this type ran (and which
+ has <varname>RemainAfterExit=</varname> not set) it will not show up as started afterwards, but
+ as dead.</para></listitem>
<listitem><para>Behavior of <option>dbus</option> is similar to <option>simple</option>; however, it is
expected that the service acquires a name on the D-Bus bus, as configured by
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><varname>ExecCondition=</varname></term>
+ <listitem><para>Optional commands that are executed before the command(s) in <varname>ExecStartPre=</varname>.
+ Syntax is the same as for <varname>ExecStart=</varname>, except that multiple command lines are allowed and the
+ commands are executed one after the other, serially.</para>
+
+ <para>The behavior is like an <varname>ExecStartPre=</varname> and condition check hybrid: when an
+ <varname>ExecCondition=</varname> command exits with exit code 1 through 254 (inclusive), the remaining
+ commands are skipped and the unit is <emphasis>not</emphasis> marked as failed. However, if an
+ <varname>ExecCondition=</varname> command exits with 255 or abnormally (e.g. timeout, killed by a
+ signal, etc.), the unit will be considered failed (and remaining commands will be skipped). Exit code of 0 or
+ those matching <varname>SuccessExitStatus=</varname> will continue execution to the next command(s).</para>
+
+ <para>The same recommendations about not running long-running processes in <varname>ExecStartPre=</varname>
+ also applies to <varname>ExecCondition=</varname>. <varname>ExecCondition=</varname> will also run the commands
+ in <varname>ExecStopPost=</varname>, as part of stopping the service, in the case of any non-zero or abnormal
+ exits, like the ones described above.</para>
+ </listitem>
+ </varlistentry>
+
<varlistentry>
<term><varname>ExecReload=</varname></term>
<listitem><para>Commands to execute to trigger a configuration
</para></listitem>
</varlistentry>
- <varlistentry>
- <term><varname>TimeoutCleanSec=</varname></term>
- <listitem><para>Configures a timeout on the clean-up operation requested through <command>systemctl
- clean …</command>, see
- <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry> for
- details. Takes the usual time values and defaults to <constant>infinity</constant>, i.e. by default
- no time-out is applied. If a time-out is configured the clean operation will be aborted forcibly when
- the time-out is reached, potentially leaving resources on disk.</para></listitem>
- </varlistentry>
-
<varlistentry>
<term><varname>RuntimeMaxSec=</varname></term>
<varlistentry>
<term><varname>SuccessExitStatus=</varname></term>
- <listitem><para>Takes a list of exit status definitions that,
- when returned by the main service process, will be considered
- successful termination, in addition to the normal successful
- exit code 0 and the signals <constant>SIGHUP</constant>,
- <constant>SIGINT</constant>, <constant>SIGTERM</constant>, and
- <constant>SIGPIPE</constant>. Exit status definitions can
- either be numeric exit codes or termination signal names,
- separated by spaces. For example:
-
- <programlisting>SuccessExitStatus=1 2 8 SIGKILL</programlisting>
-
- ensures that exit codes 1, 2, 8 and
- the termination signal <constant>SIGKILL</constant> are
- considered clean service terminations.
- </para>
+ <listitem><para>Takes a list of exit status definitions that, when returned by the main service
+ process, will be considered successful termination, in addition to the normal successful exit code 0
+ and the signals <constant>SIGHUP</constant>, <constant>SIGINT</constant>,
+ <constant>SIGTERM</constant>, and <constant>SIGPIPE</constant>. Exit status definitions can be
+ numeric exit codes, termination code names, or termination signal names, separated by spaces. See the
+ Process Exit Codes section in
+ <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry> for
+ a list of termination codes names (for this setting only the part without the
+ <literal>EXIT_</literal> or <literal>EX_</literal> prefix should be used). See
+ <citerefentry project='man-pages'><refentrytitle>signal</refentrytitle><manvolnum>7</manvolnum></citerefentry> for
+ a list of signal names.</para>
<para>This option may appear more than once, in which case the
list of successful exit statuses is merged. If the empty
string is assigned to this option, the list is reset, all
prior assignments of this option will have no
- effect.</para></listitem>
+ effect.</para>
+
+ <example>
+ <title>A service with with the the <varname>SuccessExitStatus=</varname> setting</title>
+
+ <programlisting>SuccessExitStatus=TEMPFAIL 250 SIGUSR1</programlisting>
+
+ <para>Exit codes 75 (<constant>TEMPFAIL</constant>), 250, and the termination signal
+ <constant>SIGKILL</constant> are considered clean service terminations.</para>
+ </example>
+
+ <para>Note: <command>systemd-analyze exit-codes</command> may be used to list exit
+ codes and translate between numerical code values and names.</para></listitem>
</varlistentry>
<varlistentry>
projects / thirdparty / systemd.git / blobdiff