sd-device: introduce device_enumerator_get_devices()

src/libsystemd/sd-device/device-enumerator-private.h

@@ -9,6 +9,7 @@ int device_enumerator_add_device(sd_device_enumerator *enumerator, sd_device *de
 int device_enumerator_add_match_is_initialized(sd_device_enumerator *enumerator);
 sd_device *device_enumerator_get_first(sd_device_enumerator *enumerator);
 sd_device *device_enumerator_get_next(sd_device_enumerator *enumerator);
+sd_device **device_enumerator_get_devices(sd_device_enumerator *enumerator, size_t *ret_n_devices);
 
 #define FOREACH_DEVICE_AND_SUBSYSTEM(enumerator, device)       \
         for (device = device_enumerator_get_first(enumerator); \

src/libsystemd/sd-device/device-enumerator.c

@@ -973,3 +973,14 @@ sd_device *device_enumerator_get_next(sd_device_enumerator *enumerator) {
 
         return enumerator->devices[++enumerator->current_device_index];
 }
+
+sd_device **device_enumerator_get_devices(sd_device_enumerator *enumerator, size_t *ret_n_devices) {
+        assert(enumerator);
+        assert(ret_n_devices);
+
+        if (!enumerator->scan_uptodate)
+                return NULL;
+
+        *ret_n_devices = enumerator->n_devices;
+        return enumerator->devices;
+}