core: add transient units

Transient units can be created via the bus API. They are configured via
the method call parameters rather than on-disk files. They are subject
to normal GC. Transient units currently may only be created for
services (however, we will extend this), and currently only ExecStart=
and the cgroup parameters can be configured (also to be extended).

Transient units require a unique name, that previously had no
configuration file on disk.

A tool systemd-run is added that makes use of this functionality to run
arbitrary command lines as transient services:

$ systemd-run /bin/ping www.heise.de

Will cause systemd to create a new transient service and run ping in it.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/core/dbus-unit.h b/src/core/dbus-unit.h
index 1b42757b4..18f7c4f08 100644
--- a/src/core/dbus-unit.h
+++ b/src/core/dbus-unit.h
@@ -128,6 +128,7 @@
         "  <property name=\"ConditionResult\" type=\"b\" access=\"read\"/>\n" \
         "  <property name=\"LoadError\" type=\"(ss)\" access=\"read\"/>\n" \
         "  <property name=\"ControlGroup\" type=\"s\" access=\"read\"/>\n" \
+        "  <property name=\"Transient\" type=\"b\" access=\"read\"/>\n" \
         " </interface>\n"
 
 #define BUS_UNIT_INTERFACES_LIST                \
@@ -141,7 +142,7 @@ void bus_unit_send_removed_signal(Unit *u);
 
 DBusHandlerResult bus_unit_queue_job(DBusConnection *connection, DBusMessage *message, Unit *u, JobType type, JobMode mode, bool reload_if_possible);
 
-int bus_unit_set_properties(Unit *u, DBusMessageIter *i, UnitSetPropertiesMode mode, DBusError *error);
+int bus_unit_set_properties(Unit *u, DBusMessageIter *i, UnitSetPropertiesMode mode, bool commit, DBusError *error);
 
 extern const DBusObjectPathVTable bus_unit_vtable;