take a printf-like argument list, and also logs errors on stderr
when verbose is enabled. *)
+val trace : unit -> bool
+val set_trace_flag : unit -> unit
+ (** If this contains [true] then calls to libguestfs are traced.
+
+ This is set through the [-x] command line option. *)
+
+val connect_uri : unit -> string option
+val set_connect_uri : string option -> unit
+ (** The libvirt connection URI.
+
+ This is set through the [--connect] command line option. *)
+
val utf8_rarrow : string (** UTF-8 RIGHTWARDS ARROW *)
val human_size_1k : int64 -> string