modify Dockerfile

Author: svonworl

Dockerfile

@@ -5,7 +5,8 @@ MAINTAINER Stephen Von Worley <svonworl@ucsc.edu>
 
 USER root
 RUN echo '#!/bin/bash' >> /usr/local/bin/grepc
-RUN echo 'grep -c $1 $2 > $3' >> /usr/local/bin/grepc
+RUN echo 'grep -c $1 $2 > out.txt' >> /usr/local/bin/grepc
+RUN echo '[ $? -le 1 ] && true' >> /usr/local/bin/grepc
 RUN chmod a+x /usr/local/bin/grepc
 
 CMD ["/bin/bash"]