diff options
Diffstat (limited to 'man/systemd.service.xml')
| -rw-r--r-- | man/systemd.service.xml | 50 |
1 files changed, 27 insertions, 23 deletions
diff --git a/man/systemd.service.xml b/man/systemd.service.xml index 875d368fcf..5c65957bda 100644 --- a/man/systemd.service.xml +++ b/man/systemd.service.xml @@ -96,9 +96,12 @@ <varname>After=</varname> on <filename>dbus.socket</filename>.</para> - <para>Socket activated service are automatically ordered after - their activated <filename>.socket</filename> units via an - automatic <varname>After=</varname> dependency.</para> + <para>Socket activated services are automatically ordered after + their activating <filename>.socket</filename> units via an + automatic <varname>After=</varname> dependency. + Services also pull in all <filename>.socket</filename> units + listed in <varname>Sockets=</varname> via automatic + <varname>Wants=</varname> and <varname>After=</varname> dependencies.</para> <para>Unless <varname>DefaultDependencies=</varname> in the <literal>[Unit]</literal> is set to <option>false</option>, service units will implicitly have dependencies of type <varname>Requires=</varname> and @@ -209,11 +212,11 @@ if used in combination with <varname>PrivateNetwork=</varname><option>yes</option>.</para> - <para>Behavior of <option>idle</option> is very similar to - <option>simple</option>; however, actual execution of the - service binary is delayed until all jobs are dispatched. This - may be used to avoid interleaving of output of shell services - with the status output on the console.</para> + <para>Behavior of <option>idle</option> is very similar to <option>simple</option>; however, actual execution + of the service binary is delayed until all active jobs are dispatched. This may be used to avoid interleaving + of output of shell services with the status output on the console. Note that this type is useful only to + improve console output, it is not useful as a general unit ordering tool, and the effect of this service type + is subject to a 5s time-out, after which the service binary is invoked anyway.</para> </listitem> </varlistentry> @@ -276,17 +279,12 @@ below (see section "Command Lines" below). </para> - <para>When <varname>Type=</varname> is not - <option>oneshot</option>, only one command may and must be - given. When <varname>Type=oneshot</varname> is used, zero or - more commands may be specified. This can be specified by - providing multiple command lines in the same directive, or - alternatively, this directive may be specified more than once - with the same effect. If the empty string is assigned to this - option, the list of commands to start is reset, prior - assignments of this option will have no effect. If no - <varname>ExecStart=</varname> is specified, then the service - must have <varname>RemainAfterExit=yes</varname> set.</para> + <para>Unless <varname>Type=</varname> is <option>oneshot</option>, exactly one command must be given. When + <varname>Type=oneshot</varname> is used, zero or more commands may be specified. Commands may be specified by + providing multiple command lines in the same directive, or alternatively, this directive may be specified more + than once with the same effect. If the empty string is assigned to this option, the list of commands to start + is reset, prior assignments of this option will have no effect. If no <varname>ExecStart=</varname> is + specified, then the service must have <varname>RemainAfterExit=yes</varname> set.</para> <para>For each of the specified commands, the first argument must be an absolute path to an executable. Optionally, if this file name is prefixed with <literal>@</literal>, the second token will be @@ -294,7 +292,7 @@ the absolute filename is prefixed with <literal>-</literal>, an exit code of the command normally considered a failure (i.e. non-zero exit status or abnormal exit due to signal) is ignored and considered success. If the absolute path is prefixed with <literal>+</literal> then it is executed with full - privileges. <literal>-</literal>, <literal>@</literal>, and <literal>+</literal> may be used together and they + privileges. <literal>@</literal>, <literal>-</literal>, and <literal>+</literal> may be used together and they can appear in any order.</para> <para>If more than one command is specified, the commands are @@ -429,7 +427,13 @@ service failed to start up correctly. Commands configured with this setting need to be able to operate even if the service failed starting up half-way and left incompletely initialized data around. As the service's processes have been terminated already when the commands specified with this setting are executed they should - not attempt to communicate with them.</para></listitem> + not attempt to communicate with them.</para> + + <para>Note that all commands that are configured with this setting are invoked with the result code of the + service, as well as the main process' exit code and status, set in the <varname>$SERVICE_RESULT</varname>, + <varname>$EXIT_CODE</varname> and <varname>$EXIT_STATUS</varname> environment variables, see + <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry> for + details.</para></listitem> </varlistentry> <varlistentry> @@ -848,13 +852,13 @@ serialized to <filename>/run</filename> and the file descriptors passed to the service manager, to allow restarts without losing state. Defaults to 0, i.e. no file descriptors - may be stored in the service manager by default. All file + may be stored in the service manager. All file descriptors passed to the service manager from a specific service are passed back to the service's main process on the next service restart. Any file descriptors passed to the service manager are automatically closed when POLLHUP or POLLERR is seen on them, or when the service is fully stopped - and no job queued or being executed for it.</para></listitem> + and no job is queued or being executed for it.</para></listitem> </varlistentry> <varlistentry> |