Date: Tue, 25 Oct 2011 11:20:12 +0200 From: Paul Schenkeveld <freebsd@psconsult.nl> To: freebsd-stable@freebsd.org Subject: Re: ntpd couldn't resolve host name on system boot Message-ID: <20111025092012.GA41065@psconsult.nl> In-Reply-To: <20111025010327.GA75437@icarus.home.lan> References: <4EA5EBB5.3090101@quip.cz> <20111024232750.GA74032@icarus.home.lan> <B26B1B7BC38B4479B103B78B2175234D@multiplay.co.uk> <20111025010327.GA75437@icarus.home.lan>
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On Mon, Oct 24, 2011 at 06:03:27PM -0700, Jeremy Chadwick wrote:
> The one shortcoming of netwait is that it doesn't support waiting for
> multiple NICs. Some people have dual-homed environments where they
> really would like to wait for both, say, em0 and em1, to come up and be
> functional before any more scripts are started. I left that as a
> project for someone else, but it's something that should be added given
> its importance.
How would you like to see multiple interfaces implemented:
- All interfaces must be up at the same time
- Probe interfaces one by one, proceed to the next when an interface
up or bail out when any interface stays down until the loop times
out
Another shortcoming: ipv6 support...
The patch below adds ipv6.
One caveat, ping6 is used if a word in netwait_ip contains at least a
colon so hostnames in netwait_ip are always pinged using ipv4.
Paul Schenkeveld
--- src/etc/rc.d/netwait.orig 2011-06-22 08:27:32.000000000 +0200
+++ src/etc/rc.d/netwait 2011-10-25 11:09:16.000000000 +0200
@@ -21,7 +21,7 @@
netwait_start()
{
- local ip rc count output link
+ local ip rc count output link ping_cmd
if [ -z "${netwait_ip}" ]; then
err 1 "You must define one or more IP addresses in netwait_ip"
@@ -72,7 +72,13 @@
count=1
while [ ${count} -le ${netwait_timeout} ]; do
- /sbin/ping -t 1 -c 1 -o ${ip} >/dev/null 2>&1
+ case ${ip} in
+ *:*)
+ ping_cmd="/sbin/ping6 -c 1 -o";;
+ *)
+ ping_cmd="/sbin/ping -t 1 -c 1 -o";;
+ esac
+ ${ping_cmd} ${ip} >/dev/null 2>&1
rc=$?
if [ $rc -eq 0 ]; then
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