[jira] [Created] (MESOS-9175) `Subprocess::FD` can leak file descriptors into child processes

[James Peach (JIRA)]

James Peach created MESOS-9175:
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             Summary: `Subprocess::FD` can leak file descriptors into child 
processes
                 Key: MESOS-9175
                 URL: https://issues.apache.org/jira/browse/MESOS-9175
             Project: Mesos
          Issue Type: Bug
          Components: libprocess
            Reporter: James Peach


When you use the {{subprocess}} API, you can use {{Subprocess::FD()}} to define 
how the standard IO streams are attached to the child process. The default type 
argument is {{IO::DUPLICATED}}. In that case, the descriptors are duplicated 
with {{dup(2)}} in the parent process. The new file descriptors will have their 
close-on-exec flag cleared and could then be inherited to undefined child 
processes.



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