creds: improve message about unknown user

Before:
$ build/systemd-creds --uid=asdf
Failed to resolve user 'asdf': No such process
Now:
$ build/systemd-creds --uid=asdf
Failed to resolve user 'asdf': Unknown user

diff --git a/src/creds/creds.c b/src/creds/creds.c
index 383ef268b857aefbf6f8a73f1450ce8f0753d2dc..bcdf3d30384b00f40a6c928ddaf0c01494dea678 100644 (file)
--- a/src/creds/creds.c
+++ b/src/creds/creds.c
@@ -1062,7 +1062,8 @@ static int parse_argv(int argc, char *argv[]) {
                                                 /* ret_shell= */ NULL,
                                                 /* flags= */ 0);
                                 if (r < 0)
-                                        return log_error_errno(r, "Failed to resolve user '%s': %m", optarg);
+                                        return log_error_errno(r, "Failed to resolve user '%s': %s",
+                                                               optarg, STRERROR_USER(r));
                         }
                         break;