ProcessBuilder support for pipelines

Martin Buchholz martinrb at
Tue Jul 28 16:46:54 UTC 2015

On Tue, Jul 28, 2015 at 2:36 AM, Florian Weimer <fweimer at> wrote:

> On 07/28/2015 02:48 AM, Martin Buchholz wrote:
> > In the past, when I contemplated doing this, I generally thought that
> there
> > wasn't enough value in such a feature for the effort, given that one can
> > start a subprocess shell that supports pipelines.  Does this feature pull
> > its weight?
> Feeding program arguments to command spawned by a shell is difficult.

You know what would actually be really useful?

String shellQuote(List<String> args)

but that is Unix-shell specific, so historically difficult to convince JDK
maintainers to add.  But culture has changed towards the pragmatic...

I've already written such a thing, but not in Java.

There is also no good way to obtain the exit status of the first command
> in the pipe.  The last command in the pipe determines the shell exit
> status, and earlier commands are ignored.

Well, bash does have the "pipefail" feature.

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