Process API Updates (JEP 102)
fweimer at redhat.com
Tue Mar 25 12:18:10 UTC 2014
On 03/24/2014 10:11 PM, roger riggs wrote:
> From the scope of the JEP, a fairly simple API seems sufficient.
> - Enumerate the direct children
> - The rest of the functions are similar to Process
> - to terminate a process, forcibly and normally
> - to destroy a process and all of its children recursively
> - to check if one is alive
> - to waitFor for termination and retrieve the exit status
On Linux, I think you need to use obscure mechanisms to make this
iteration reliable (cgroups perhaps). There is no openpid() or similar
mechanism that allows you to obtain a stable handle.
Somewhat relatedly, it would make sense to make Process auto-closeable,
so that you can make sure that no non-Java resources are retained.
Right now, this seems to require calling destroyForcibly().waitFor().
It would be nice if there was a way to directly pipe the output of one
process to the input of another process. I think that even with Java 8,
this still needs an explicit copy loop.
Florian Weimer / Red Hat Product Security Team
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