log: introduce log_trace_errno()

diff --git a/src/basic/log.h b/src/basic/log.h
index 1e2bec16468cbc3614b9bb0955cfdeb7c903c293..0d927bfce976a8e122d5bfa35b08b92b0d4938a2 100644 (file)
--- a/src/basic/log.h
+++ b/src/basic/log.h
@@ -273,9 +273,11 @@ int log_emergency_level(void);
         })
 
 #if LOG_TRACE
-#  define log_trace(...) log_debug(__VA_ARGS__)
+#  define log_trace(...)          log_debug(__VA_ARGS__)
+#  define log_trace_errno(...)    log_debug_errno(__VA_ARGS__)
 #else
-#  define log_trace(...) do {} while (0)
+#  define log_trace(...)          do {} while (0)
+#  define log_trace_errno(e, ...) (-ERRNO_VALUE(e))
 #endif
 
 /* Structured logging */