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Ping puzzle



Here's a bizarre puzzle that I've been trying  to  solve  on  several
linux boxen:  How does a parent process read the stderr of /bin/ping?

It oughta be trivial.  But consider this ping of a  machine  that  is
down at the moment:

$ /bin/ping -n -i 10 64.28.81.46
PING 64.28.81.46 (64.28.81.46) from 207.172.135.95 : 56 data bytes



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