X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Funit.c;h=5a451c57c2a038c1cc297c7d3658f96527ab206e;hp=001d7659c430d745e26881890bc9f40ab6b5fe1c;hb=1b39d4b9d271f2309a193d4e4fae6633248b0e94;hpb=5ed9f5d65e7a7636936f9265093ba44b48e562c9

diff --git a/src/unit.c b/src/unit.c
index 001d7659c..5a451c57c 100644
--- a/src/unit.c
+++ b/src/unit.c
@@ -440,6 +440,7 @@ static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) {
         assert(other);
         assert(d < _UNIT_DEPENDENCY_MAX);
 
+        /* Fix backwards pointers */
         SET_FOREACH(back, other->meta.dependencies[d], i) {
                 UnitDependency k;
 
@@ -725,6 +726,48 @@ int unit_load_fragment_and_dropin_optional(Unit *u) {
         return 0;
 }
 
+int unit_add_default_target_dependency(Unit *u, Unit *target) {
+        assert(u);
+        assert(target);
+
+        if (target->meta.type != UNIT_TARGET)
+                return 0;
+
+        /* Only add the dependency if boths units are loaded, so that
+         * that loop check below is reliable */
+        if (u->meta.load_state != UNIT_LOADED ||
+            target->meta.load_state != UNIT_LOADED)
+                return 0;
+
+        /* Don't create loops */
+        if (set_get(target->meta.dependencies[UNIT_BEFORE], u))
+                return 0;
+
+        return unit_add_dependency(target, UNIT_AFTER, u, true);
+}
+
+static int unit_add_default_dependencies(Unit *u) {
+        Unit *target;
+        Iterator i;
+        int r;
+
+        assert(u);
+
+        SET_FOREACH(target, u->meta.dependencies[UNIT_REQUIRED_BY], i)
+                if ((r = unit_add_default_target_dependency(u, target)) < 0)
+                        return r;
+
+        SET_FOREACH(target, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
+                if ((r = unit_add_default_target_dependency(u, target)) < 0)
+                        return r;
+
+        SET_FOREACH(target, u->meta.dependencies[UNIT_WANTED_BY], i)
+                if ((r = unit_add_default_target_dependency(u, target)) < 0)
+                        return r;
+
+        return 0;
+}
+
 int unit_load(Unit *u) {
         int r;
 
@@ -750,6 +793,11 @@ int unit_load(Unit *u) {
                 goto fail;
         }
 
+        if (u->meta.load_state == UNIT_LOADED &&
+            u->meta.default_dependencies)
+                if ((r = unit_add_default_dependencies(u)) < 0)
+                        goto fail;
+
         assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into);
 
         unit_add_to_dbus_queue(unit_follow_merge(u));