从Java ProcessBuilder运行的shell中显示提示

Question

I run a sh shell process like this:

ProcessBuilder pb = new ProcessBuilder();
pb.command("sh");
Process p = pb.start();

and then I push commands into its OutputStream and read output from its InputStream. All works fine - I have a shell.

However the shell has no prompt. If I run "sh" on the device through adb, I get a prompt. I can change the prompt using PS1=blah . But when sh is run from ProcessBuilder , no prompt.

How can I make the prompt appear please?

Answer 1

The trick is to force the shell to run in 'interactive' mode - equivalent to using sh -i :

ProcessBuilder pb = new ProcessBuilder();
pb.command("sh", "-i");
Process p = pb.start();

That works, but unfortunately complains about not being able to find a tty fd. I can live with that for now.