Do not invoke gnuplot when there is nothing to plot

[can-benchmark.git] / gw-tests / lib.sh

diff --git a/gw-tests/lib.sh b/gw-tests/lib.sh
index 43afe6de213898e5b6a095b4d06e9ffe18c67051..467321de429e8c8b1be3214b658f84f1a18c20ff 100644 (file)
--- a/gw-tests/lib.sh
+++ b/gw-tests/lib.sh
@@ -27,7 +27,7 @@ PATH=$PWD/../_compiled/bin/:$PATH
 sshgw() {
     local socket="$HOME/.ssh/cangw-connection"
 
-    if [[ ! -S $socket ]]; then
+    if [[ ! -S $socket ]] || ! ssh -x -a -S $socket root@192.168.2.3 true; then
        # Create master connection to speed up subsequenct command.
        # The ssh is put into background and the connection is closed
        # after 10 minutes)
@@ -44,6 +44,7 @@ _plot() {
     local testname=`basename $0 .sh`
 
     plot_cmds | sed -e "/set title/ s/[\"']\(.*\)[\"']/\"\1\\\\n($kvers)\"/" > plot.gp
+    if [[ ! -s plot.gp ]]; then return; fi
     if [ -z "$OPT_NO_X11" ]; then
        echo "set terminal x11 enhanced; $(< plot.gp)" | gnuplot -persist
     fi