Error running linux command from java

Question

I am trying to run the below command from java code using Process process =Runtime.getRuntime().exec(command) but getting the error.

Command: repo forall -c 'pwd;git status'

Error:'pwd;git: -c: line 0: unexpected EOF while looking for matching''` I am able to run this command from linux terminal but when running from java the problem is with the space after pwd;git. Can anyone help me?

"I am able to run this command from linux terminal" <-- A Process is not a command interpreter! What is more, don't use Runtime.exec(), use a ProcessBuilder. — fge
– fge, Commented Sep 22, 2015 at 6:48
@fge: Do you mean I am getting this errir because of using Runtime.exec()? — Bhargav Kumar R
– Bhargav Kumar R, Commented Sep 22, 2015 at 6:52

fge · Accepted Answer · 2015-09-22 07:05:09Z

2

This is an ultra classical mistake and I am frankly surprised that you didn't find the answer to it by searching around.

A Process is not a command interpreter.

However, Runtime.exec() will still try and act as one if you pass it only one argument, and here you'll end up splitting like this:

repo
forall
-c
'pwd;git
status'

Which is obviously not what you want.

Use a ProcessBuilder. I won't do it all for you but here is how to start:

final Process p = new ProcessBuilder()
    .command("repo", "forall", "-c", "pwd; git status")
    // etc etc
    .start();

Link to the javadoc.

answered Sep 22, 2015 at 7:05

fge

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