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systemctl: introduce try-restart and reload-or-restart commands

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This commit is contained in:
Lennart Poettering 2010-07-13 20:20:36 +02:00
parent 3dda9fc3a7
commit 6f28c033ec
5 changed files with 100 additions and 21 deletions
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34
man/systemctl.xml
View File

@ -193,13 +193,6 @@
specified on the command
line.</para></listitem>
</varlistentry>
<varlistentry>
<term><command>restart [NAME...]</command></term>
<listitem><para>Restart one or more
units specified on the command
line.</para></listitem>
</varlistentry>
<varlistentry>
<term><command>reload [NAME...]</command></term>
@ -226,6 +219,33 @@
commands.</para></listitem>
</varlistentry>
<varlistentry>
<term><command>restart [NAME...]</command></term>
<listitem><para>Restart one or more
units specified on the command
line. If the units are not running yet
they will be
started.</para></listitem>
</varlistentry>
<varlistentry>
<term><command>try-restart [NAME...]</command></term>
<listitem><para>Restart one or more
units specified on the command
line. If the units are not running yet
the operation will
fail.</para></listitem>
</varlistentry>
<varlistentry>
<term><command>reload-or-restart [NAME...]</command></term>
<term><command>reload-or-try-restart [NAME...]</command></term>
<listitem><para>Reload one or more
units if they support it. If not
restart them
instead.</para></listitem>
</varlistentry>
<varlistentry>
<term><command>isolate [NAME]</command></term>

26
src/dbus-manager.c
View File

@ -62,6 +62,16 @@
" <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"job\" type=\"o\" direction=\"out\"/>\n" \
" </method>\n" \
" <method name=\"ReloadOrRestartUnit\">\n" \
" <arg name=\"name\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"job\" type=\"o\" direction=\"out\"/>\n" \
" </method>\n" \
" <method name=\"ReloadOrTryRestartUnit\">\n" \
" <arg name=\"name\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"job\" type=\"o\" direction=\"out\"/>\n" \
" </method>\n" \
" <method name=\"GetJob\">\n" \
" <arg name=\"id\" type=\"u\" direction=\"in\"/>\n" \
" <arg name=\"job\" type=\"o\" direction=\"out\"/>\n" \
@ -239,6 +249,7 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
DBusMessage *reply = NULL;
char * path = NULL;
JobType job_type = _JOB_TYPE_INVALID;
bool reload_if_possible = false;
assert(connection);
assert(message);
@ -310,7 +321,13 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
job_type = JOB_RESTART;
else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "TryRestartUnit"))
job_type = JOB_TRY_RESTART;
else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrRestartUnit")) {
reload_if_possible = true;
job_type = JOB_RESTART;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrTryRestartUnit")) {
reload_if_possible = true;
job_type = JOB_TRY_RESTART;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
uint32_t id;
Job *j;
@ -739,6 +756,13 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
return bus_send_error_reply(m, connection, message, &error, r);
if (reload_if_possible && unit_can_reload(u)) {
if (job_type == JOB_RESTART)
job_type = JOB_RELOAD_OR_START;
else if (job_type == JOB_TRY_RESTART)
job_type = JOB_RELOAD;
}
if (job_type == JOB_START && u->meta.only_by_dependency) {
dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Unit may be activated by dependency only.");
return bus_send_error_reply(m, connection, message, &error, -EPERM);

16
src/dbus-unit.c
View File

@ -260,6 +260,7 @@ static DBusHandlerResult bus_unit_message_dispatch(Unit *u, DBusConnection *conn
DBusError error;
JobType job_type = _JOB_TYPE_INVALID;
char *path = NULL;
bool reload_if_possible = false;
dbus_error_init(&error);
@ -273,7 +274,13 @@ static DBusHandlerResult bus_unit_message_dispatch(Unit *u, DBusConnection *conn
job_type = JOB_RESTART;
else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "TryRestart"))
job_type = JOB_TRY_RESTART;
else if (UNIT_VTABLE(u)->bus_message_handler)
else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "ReloadOrRestart")) {
reload_if_possible = true;
job_type = JOB_RESTART;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "ReloadOrTryRestart")) {
reload_if_possible = true;
job_type = JOB_TRY_RESTART;
} else if (UNIT_VTABLE(u)->bus_message_handler)
return UNIT_VTABLE(u)->bus_message_handler(u, connection, message);
else
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
@ -296,6 +303,13 @@ static DBusHandlerResult bus_unit_message_dispatch(Unit *u, DBusConnection *conn
DBUS_TYPE_INVALID))
return bus_send_error_reply(m, connection, message, &error, -EINVAL);
if (reload_if_possible && unit_can_reload(u)) {
if (job_type == JOB_RESTART)
job_type = JOB_RELOAD_OR_START;
else if (job_type == JOB_TRY_RESTART)
job_type = JOB_RELOAD;
}
if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
return bus_send_error_reply(m, connection, message, &error, -EINVAL);

10
src/dbus-unit.h
View File

@ -36,6 +36,10 @@
" <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"job\" type=\"o\" direction=\"out\"/>\n" \
" </method>\n" \
" <method name=\"Reload\">\n" \
" <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"job\" type=\"o\" direction=\"out\"/>\n" \
" </method>\n" \
" <method name=\"Restart\">\n" \
" <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"job\" type=\"o\" direction=\"out\"/>\n" \
@ -44,7 +48,11 @@
" <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"job\" type=\"o\" direction=\"out\"/>\n" \
" </method>\n" \
" <method name=\"Reload\">\n" \
" <method name=\"ReloadOrRestart\">\n" \
" <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"job\" type=\"o\" direction=\"out\"/>\n" \
" </method>\n" \
" <method name=\"ReloadOrTryRestart\">\n" \
" <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"job\" type=\"o\" direction=\"out\"/>\n" \
" </method>\n" \

35
src/systemctl.c
View File

@ -733,10 +733,13 @@ static int start_unit(DBusConnection *bus, char **args, unsigned n) {
if (arg_action == ACTION_SYSTEMCTL) {
method =
streq(args[0], "stop") ? "StopUnit" :
streq(args[0], "reload") ? "ReloadUnit" :
streq(args[0], "restart") ? "RestartUnit" :
"StartUnit";
streq(args[0], "stop") ? "StopUnit" :
streq(args[0], "reload") ? "ReloadUnit" :
streq(args[0], "restart") ? "RestartUnit" :
streq(args[0], "try-restart") ? "TryRestartUnit" :
streq(args[0], "reload-or-restart") ? "ReloadOrRestartUnit" :
streq(args[0], "reload-or-try-restart") ? "ReloadOrTryRestartUnit" :
"StartUnit";
mode =
(streq(args[0], "isolate") ||
@ -2497,7 +2500,8 @@ static int systemctl_help(void) {
" -t --type=TYPE List only units of a particular type\n"
" -p --property=NAME Show only properties by this name\n"
" -a --all Show all units/properties, including dead/empty ones\n"
" --fail When installing a new job, fail if conflicting jobs are pending\n"
" --fail When installing a new job, fail if conflicting jobs are\n"
" pending\n"
" --system Connect to system bus\n"
" --session Connect to session bus\n"
" -q --quiet Suppress output\n"
@ -2507,12 +2511,18 @@ static int systemctl_help(void) {
" list-units List units\n"
" start [NAME...] Start one or more units\n"
" stop [NAME...] Stop one or more units\n"
" restart [NAME...] Restart one or more units\n"
" reload [NAME...] Reload one or more units\n"
" restart [NAME...] Start or restart one or more units\n"
" try-restart [NAME...] Restart one or more units if active\n"
" reload-or-restart [NAME...] Reload one or more units is possible,\n"
" otherwise start or restart\n"
" reload-or-try-restart [NAME...] Reload one or more units is possible,\n"
" otherwise restart if active\n"
" isolate [NAME] Start one unit and stop all others\n"
" check [NAME...] Check whether any of the passed units are active\n"
" check [NAME...] Check whether units are active\n"
" status [NAME...] Show status of one or more units\n"
" show [NAME...|JOB...] Show properties of one or more units/jobs/manager\n"
" show [NAME...|JOB...] Show properties of one or more\n"
" units/jobs/manager\n"
" load [NAME...] Load one or more units\n"
" list-jobs List jobs\n"
" cancel [JOB...] Cancel one or more jobs\n"
@ -2530,9 +2540,9 @@ static int systemctl_help(void) {
" halt Shut down and halt the system\n"
" poweroff Shut down and power-off the system\n"
" reboot Shut down and reboot the system\n"
" default Enter default mode\n"
" rescue Enter rescue mode\n"
" emergency Enter emergency mode\n",
" rescue Enter system rescue mode\n"
" emergency Enter system emergency mode\n"
" default Enter system default mode\n",
program_invocation_short_name);
return 0;
@ -3193,6 +3203,9 @@ static int systemctl_main(DBusConnection *bus, int argc, char *argv[]) {
{ "stop", MORE, 2, start_unit },
{ "reload", MORE, 2, start_unit },
{ "restart", MORE, 2, start_unit },
{ "try-restart", MORE, 2, start_unit },
{ "reload-or-restart", MORE, 2, start_unit },
{ "reload-or-try-restart", MORE, 2, start_unit },
{ "isolate", EQUAL, 2, start_unit },
{ "check", MORE, 2, check_unit },
{ "show", MORE, 1, show },