James Peach created MESOS-8155:
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Summary: subprocess clone argument should return a Try<pid_r>
Key: MESOS-8155
URL: https://issues.apache.org/jira/browse/MESOS-8155
Project: Mesos
Issue Type: Bug
Components: libprocess
Reporter: James Peach
In libprocess, the {{subprocess}} API accepts a {{clone}} argument. This is
supposed to return a {{pid_t}} and set {{errno}} on error. However. Mesos
sometimes passes {{ns::clone}} as the {{clone}} argument, and this API does not
set {{errno}} which results in {{subprocess}} propagating a misleading error
message up the stack.
Since it is not at all obvious how to map all the {{ns::clone}} error
conditions to an expressive {{errno}}, we should just change the clone argument
to return a {{Try<pid_t>}}.
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