rng-tools: start rngd early enough to actually be useful
lighttpd starts at priority 50, but promptly calls getrandom() on
initialization (li_rand_reseed() and li_rand_device_bytes() from
server_init()). If /dev/urandom (which getrandom() uses by default)
doesn't have sufficient entropy, this will block.
Since Openwrt runs the startup scripts serially, this can block
initialization indefinitely. I've seen 15-20 minutes typically.
Seeding the pool early on can quickly built sufficient entropy to
complete booting without blocking.
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
(cherry picked from commit 901ef617c7
)
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#!/bin/sh /etc/rc.common
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# Copyright (C) 2011-2014 OpenWrt.org
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START=98
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START=25
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USE_PROCD=1
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PROG=/sbin/rngd
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