> I only tried this with 1.6.1 and 2.1, but it sems that /sbin/ping
> blocks if it is dropped into background, complaining about "tty
> output" even when stdout and stderr are redirected on the command
> line.  I see no option to turn this behaviour off and I need it so I
> can use ping in a daemon script to establish connectivity.

For all that it says "tty output", try redirecting stdin as well.  I've
had that work, sometimes.  (By which I mean, I can't recall whether it
works with ping, but I've had it work with somke programs that stop
themselves when they "shouldn't" in that kind of way.)

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