unit-printf: before resolving exec context specifiers check whether the object actually has an exec context

1 files changed, 11 insertions, 0 deletions

diff --git a/src/core/unit.c b/src/core/unit.c
index 4eea5b57ae..1e33936346 100644
--- a/src/core/unit.c
+++ b/src/core/unit.c
@@ -2684,6 +2684,17 @@ int unit_exec_context_defaults(Unit *u, ExecContext *c) {
         return 0;
 }
 
+ExecContext *unit_get_exec_context(Unit *u) {
+        size_t offset;
+        assert(u);
+
+        offset = UNIT_VTABLE(u)->exec_context_offset;
+        if (offset <= 0)
+                return NULL;
+
+        return (ExecContext*) ((uint8_t*) u + offset);
+}
+
 static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = {
         [UNIT_ACTIVE] = "active",
         [UNIT_RELOADING] = "reloading",