nspawn: path_is_read_only_fs() may return negative errno

And we usually assume /sys is not read only on error.

diff --git a/src/nspawn/nspawn-network.c b/src/nspawn/nspawn-network.c
index 97e2756658bf3fc7f70627032841dc84ffc277a9..023b1e7e1a81b96c476e71f8f543f3ba5a19200b 100644 (file)
--- a/src/nspawn/nspawn-network.c
+++ b/src/nspawn/nspawn-network.c
@@ -469,7 +469,7 @@ int test_network_interface_initialized(const char *name) {
         _cleanup_(sd_device_unrefp) sd_device *d = NULL;
         int r;
 
-        if (path_is_read_only_fs("/sys"))
+        if (path_is_read_only_fs("/sys") > 0)
                 return 0;
 
         /* udev should be around. */