check if smpirun has something to execute

diff --git a/src/smpi/smpirun.in b/src/smpi/smpirun.in
index 07c97f7..aea4116 100755 (executable)
--- a/src/smpi/smpirun.in
+++ b/src/smpi/smpirun.in
@@ -115,6 +115,13 @@ shift
 
 ##-----------------------------------
 
+# test if we have something to execute, otherwise show usage and exit
+if [ -z ${EXEC} ]
+then
+    echo "Program is missing"
+    usage
+    exit 1
+fi