tests: Avoid xargs, for FreeBSD compatibility.

The FreeBSD version of xargs does not run the utility argument on empty
input, while GNU xargs runs it at least once, even with empty input.  As
a result on FreeBSD VSCTL_CHECK_FIND returned no output for an empty
bridge list while on Linux it returned a single blank line.

Signed-off-by: Ed Maste <emaste@freebsd.org>
Signed-off-by: Ben Pfaff <blp@nicira.com>

diff --git a/tests/ovs-vsctl.at b/tests/ovs-vsctl.at
index 71c46cd419610ce45eb80dd96aea8068fa01c3c5..a6c67498175dfb4fca95a79fd2efbe8072046756 100644 (file)
--- a/tests/ovs-vsctl.at
+++ b/tests/ovs-vsctl.at
@@ -769,7 +769,7 @@ AT_CHECK(
 
 ])
 m4_define([VSCTL_CHECK_FIND],
-  [AT_CHECK([ovs-vsctl --bare --timeout=5 --no-wait -vreconnect:emer --db=unix:socket -- --columns=name find bridge '$1' | sort | xargs echo], [0], [$2
+  [AT_CHECK([echo `ovs-vsctl --bare --timeout=5 --no-wait -vreconnect:emer --db=unix:socket -- --columns=name find bridge '$1' | sort`], [0], [$2
 ])])
 
 # Arithmetic relational operators without keys.