libink/finit: properties, and org.finit on the system bus

Runlevel and version are state, not actions, so they belong behind
org.freedesktop.DBus.Properties rather than another method each.

Finit also claims org.finit on the system bus when it finds one, so
ordinary D-Bus clients can reach it without knowing about
/run/finit/bus.  Opportunistic on purpose: no dbus-daemon is a normal
state for the systems Finit runs on, not an error to report.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

test/dbus-initctl.sh

@@ -66,3 +66,31 @@ case "$(cat /tmp/dbus-initctl-cond.out)" in
     *)
         fail "initctl cond set didn't produce expected signal: $(cat /tmp/dbus-initctl-cond.out)" ;;
 esac
+
+# ---------- arc B: signal + reload <svc> routing ----------
+
+# initctl signal exits 0 iff the bus call succeeded.  We send SIGCONT
+# (no observable side-effect on a healthy daemon) so the test stays
+# benign regardless of how keventd handles it.
+say "initctl signal routes through Manager1.Signal"
+texec initctl signal keventd CONT >/dev/null \
+    || fail "initctl signal returned non-zero"
+assert "initctl signal ok" 0 -eq 0
+
+say "initctl signal on a bogus identity reports NoSuchService"
+set +e
+texec initctl signal no-such-svc-anywhere CONT >/tmp/dbus-sig-bad.out 2>&1
+sigbad_rc=$?
+set -e
+assert "Bogus signal target rejected (rc=$sigbad_rc)" "$sigbad_rc" -ne 0
+case "$(cat /tmp/dbus-sig-bad.out)" in
+    *"no such task or service"*)
+        assert "Error message mentions missing service" 0 -eq 0 ;;
+    *)
+        fail "Unexpected initctl signal output: $(cat /tmp/dbus-sig-bad.out)" ;;
+esac
+
+say "initctl reload <svc> routes through Service1.Reload"
+texec initctl reload keventd >/dev/null \
+    || fail "initctl reload keventd returned non-zero"
+assert "Per-service reload ok" 0 -eq 0