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| -rw-r--r-- | man/systemd.service.xml | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/man/systemd.service.xml b/man/systemd.service.xml index 0fe694ab7e..e26196323d 100644 --- a/man/systemd.service.xml +++ b/man/systemd.service.xml @@ -383,10 +383,21 @@ run, all processes remaining for a service are terminated according to the <varname>KillMode=</varname> setting (see <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>). - If this option is not specified, the process is terminated - immediately when service stop is requested. Specifier and - environment variable substitution is supported (including - <varname>$MAINPID</varname>, see above).</para></listitem> + If this option is not specified, the process is terminated by + sending the signal specified in <varname>KillSignal=</varname> + when service stop is requested. Specifier and environment + variable substitution is supported (including + <varname>$MAINPID</varname>, see above).</para> + + <para>Note that it is usually not sufficient to specify a + command for this setting that only asks the service to + terminate (for example by queuing some form of termination + signal for it), but does not wait for it to do so. Since the + remaining processes of the services are killed using + <constant>SIGKILL</constant> immediately after the command + exited this would not result in a clean stop. The specified + command should hence be a synchronous operation, not an + asynchronous one.</para></listitem> </varlistentry> <varlistentry> |