1 files changed, 106 insertions, 0 deletions
diff --git a/src/machine/machined-core.c b/src/machine/machined-core.c
new file mode 100644
index 0000000..ffca209
--- /dev/null
+++ b/src/machine/machined-core.c
@@ -0,0 +1,106 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "machined.h"
+#include "nscd-flush.h"
+#include "strv.h"
+#include "user-util.h"
+
+#if ENABLE_NSCD
+static int on_nscd_cache_flush_event(sd_event_source *s, void *userdata) {
+        /* Let's ask glibc's nscd daemon to flush its caches. We request this for the three database machines may show
+         * up in: the hosts database (for resolvable machine names) and the user and group databases (for the user ns
+         * ranges). */
+
+        (void) nscd_flush_cache(STRV_MAKE("passwd", "group", "hosts"));
+        return 0;
+}
+
+int manager_enqueue_nscd_cache_flush(Manager *m) {
+        int r;
+
+        assert(m);
+
+        if (!m->nscd_cache_flush_event) {
+                r = sd_event_add_defer(m->event, &m->nscd_cache_flush_event, on_nscd_cache_flush_event, m);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to allocate NSCD cache flush event: %m");
+
+                sd_event_source_set_description(m->nscd_cache_flush_event, "nscd-cache-flush");
+        }
+
+        r = sd_event_source_set_enabled(m->nscd_cache_flush_event, SD_EVENT_ONESHOT);
+        if (r < 0) {
+                m->nscd_cache_flush_event = sd_event_source_unref(m->nscd_cache_flush_event);
+                return log_error_errno(r, "Failed to enable NSCD cache flush event: %m");
+        }
+
+        return 0;
+}
+#endif
+
+int manager_find_machine_for_uid(Manager *m, uid_t uid, Machine **ret_machine, uid_t *ret_internal_uid) {
+        Machine *machine;
+        int r;
+
+        assert(m);
+        assert(uid_is_valid(uid));
+
+        /* Finds the machine for the specified host UID and returns it along with the UID translated into the
+         * internal UID inside the machine */
+
+        HASHMAP_FOREACH(machine, m->machines) {
+                uid_t converted;
+
+                r = machine_owns_uid(machine, uid, &converted);
+                if (r < 0)
+                        return r;
+                if (r) {
+                        if (ret_machine)
+                                *ret_machine = machine;
+
+                        if (ret_internal_uid)
+                                *ret_internal_uid = converted;
+
+                        return true;
+                }
+        }
+
+        if (ret_machine)
+                *ret_machine = NULL;
+        if (ret_internal_uid)
+                *ret_internal_uid = UID_INVALID;
+
+        return false;
+}
+
+int manager_find_machine_for_gid(Manager *m, gid_t gid, Machine **ret_machine, gid_t *ret_internal_gid) {
+        Machine *machine;
+        int r;
+
+        assert(m);
+        assert(gid_is_valid(gid));
+
+        HASHMAP_FOREACH(machine, m->machines) {
+                gid_t converted;
+
+                r = machine_owns_gid(machine, gid, &converted);
+                if (r < 0)
+                        return r;
+                if (r) {
+                        if (ret_machine)
+                                *ret_machine = machine;
+
+                        if (ret_internal_gid)
+                                *ret_internal_gid = converted;
+
+                        return true;
+                }
+        }
+
+        if (ret_machine)
+                *ret_machine = NULL;
+        if (ret_internal_gid)
+                *ret_internal_gid = GID_INVALID;
+
+        return false;
+}