EMFILE handling for child_process

[solmsted]

While graceful-fs does a terrific job of handling EMFILE errors for fs operations, when a process is at its open file descriptor limit nothing is handling the EMFILE errors from child_process operations. Since graceful-fs already has the enqueue and retry mechanism in place when file descriptors are closed, would it be possible to offer a patched child_process object that uses the same queue?

Alternatively, is it possible to receive an event from the queue so my application can be notified when there are free file descriptors available to the process?