nspawn: improve error message when we cannot resolve the root directory argument

diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c
index 81d17484ac6fabcfcb71e2b5372f6a2f93bd050a..cd757c497b73ee63867b855aba686c1f94e90ea9 100644 (file)
--- a/src/nspawn/nspawn.c
+++ b/src/nspawn/nspawn.c
@@ -192,7 +192,7 @@ static int parse_argv(int argc, char *argv[]) {
                         free(arg_directory);
                         arg_directory = canonicalize_file_name(optarg);
                         if (!arg_directory) {
-                                log_error("Failed to canonicalize root directory.");
+                                log_error("Invalid root directory: %m");
                                 return -ENOMEM;
                         }