unit: add minimal condition checker for unit startup

1 files changed, 10 insertions, 0 deletions

diff --git a/src/unit.c b/src/unit.c
index 9fc9be5c79..07978134de 100644
--- a/src/unit.c
+++ b/src/unit.c
@@ -375,6 +375,8 @@ void unit_free(Unit *u) {
 
         set_free_free(u->meta.names);
 
+        condition_free_list(u->meta.conditions);
+
         free(u->meta.instance);
         free(u);
 }
@@ -639,6 +641,8 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
         if (u->meta.job_timeout > 0)
                 fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->meta.job_timeout));
 
+        condition_dump_list(u->meta.conditions, f, prefix);
+
         for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) {
                 Unit *other;
 
@@ -840,6 +844,12 @@ int unit_start(Unit *u) {
         if (!UNIT_VTABLE(u)->start)
                 return -EBADR;
 
+        /* If the conditions failed, don't do anything at all */
+        if (!condition_test_list(u->meta.conditions)) {
+                log_debug("Starting of %s requested but condition failed. Ignoring.", u->meta.id);
+                return -EALREADY;
+        }
+
         /* We don't suppress calls to ->start() here when we are
          * already starting, to allow this request to be used as a
          * "hurry up" call, for example when the unit is in some "auto