stroke: stop enumerating IKE_SAs in statusall if output stream gets closed

If the output stream is not interested in more information, it can close the
the stream. Checking for stream errors avoids useless enumeration of IKE_SAs,
saving resources. This allows to use "ipsec statusall | head" to monitor the
daemon, or stop enumerating IKE_SAs after a specific entry has been found.

diff --git a/src/libcharon/plugins/stroke/stroke_list.c b/src/libcharon/plugins/stroke/stroke_list.c
index e81f3fc3241b85ac788e4c00d89354d2a2229744..7431514b6f0c92de1405c893556f3c5d404be319 100644 (file)
--- a/src/libcharon/plugins/stroke/stroke_list.c
+++ b/src/libcharon/plugins/stroke/stroke_list.c
@@ -647,7 +647,7 @@ METHOD(stroke_list_t, status, void,
                half_open);
        enumerator = charon->controller->create_ike_sa_enumerator(
                                                                                                        charon->controller, wait);
-       while (enumerator->enumerate(enumerator, &ike_sa))
+       while (enumerator->enumerate(enumerator, &ike_sa) && ferror(out) == 0)
        {
                bool ike_printed = FALSE;
                enumerator_t *children = ike_sa->create_child_sa_enumerator(ike_sa);