Question

I am currently trying to make a bash testing script that will…

1) Go into many peoples folders

2) Compile their two java files

3) Run two quick tests for the the compiled results and send the output to a file to be saved in their folder

4) Take the results of those four result files, and dump them into one result file with a template at the top for me to input the results

… and I currently have most of this done. My only issue is that their program asks for a couple lines of input, for example…

Input num 1:

Input num 2:

Input num 3:

… and so on, and I am not sure how to get it to continue putting input into their program. Do I need an EOF after my hard coded input in my bash file?? Here is what I have so far…

#! /bin/bash


for i in $(find . -maxdepth 1 -type d)
do

    pwd
    pushd "$i"
    pwd

    if [ -f "First.java" ];
    then
        javac -cp . First.java
        echo easyFirst.txt | java -cp . First - > easyFirstResult
        echo hardFirst.txt | java -cp . First - > hardFirstResult
    fi

    if [ -f "Second.java" ];
    then
        javac -cp . Second.java
        echo easySecond | java -cp . Second - > easySecondResult
        echo hardSecond | java -cp . Second - > hardSecondResult
    fi


    printf "easyFirstResult\t: \hardFirstResult\t: \easySecondResult\t: \hardSecondResult\t: " > lab5grade.txt

    popd

done

P.S. Everything is working besides the multi-line input, and I have two text files with my hard coded input to test the code.

Thanks!

Answer 1

I see commands like

echo easyFirst.txt | java -cp . First - > easyFirstResult

apparently supplying a line of input to the java programs; but echo commands like that don’t transfer file contents, they merely copy text like “easyFirst.txt” to stdout. To pipe the contents of file easyFirst.txt into First, use a command like

java -cp . First - < easyFirst.txt > easyFirstResult

(Note, the above supposes classpath is ., class is First, and - is an unexplained command line argument to First.)