I have two .jar file in a pipeline. 1.jar will output two lines, both of which will be the input of 2.jar. Now I want to store the each line of the intermediate output of 1.jar to variables A and B, while allowing 2.jar to take both lines as input.
java -jar 1.jar | XXX | java -jar 2.jar
As a detour, I could do
java -jar 1.jar | tee out | java -jar 2.jar
and read the file to save the variables, but I'd like a more straight-forward way of doing it.
The final version, with refinements by Jonathan Leffler:
IFS=$'\n' a=($(java -jar 1.jar)); printf "%s\n" "${a[@]}" | java -jar 2.jar
echo ${a[0]} # line 1
echo ${a[1]} # line 2
echo "$a" so that the newline is preserved. Consider: a=($(java -jar 1.jar)); printf "%s\n" "${a[@]}" | java -jar 2.jar. This gives you the two lines in two separate array elements. I was working around to an array based solution, but hadn't got there yet.3>&1 etc (and failing, I might add), but you simplified the process by capturing the output and then feeding it. All I did was help a little with refining that important idea!
${a[@]} seems to store each token instead of each line. Instead of "token11 token12 token13\ntoken21 token22\n", "%s\n" "${a[@]}" is printing "token11\ntoken12\ntoken13\ntoken21\ntoken22\n"