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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64
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Current File : //etc/rc.d/netwait

#!/bin/sh

# $FreeBSD: release/9.1.0/etc/rc.d/netwait 231653 2012-02-14 10:16:56Z dougb $
#
# PROVIDE: netwait
# REQUIRE: NETWORKING
# KEYWORD: nojail
#
# The netwait script is intended to be used by systems which have
# statically-configured IP addresses in rc.conf(5).  If your system
# uses DHCP, you should use synchronous_dhclient="YES" in your
# /etc/rc.conf instead of using netwait.

. /etc/rc.subr

name="netwait"
rcvar="netwait_enable"

start_cmd="${name}_start"
stop_cmd=":"

netwait_start()
{
	local ip rc count output link

	if [ -z "${netwait_ip}" ]; then
		err 1 "You must define one or more IP addresses in netwait_ip"
	fi

	if [ ${netwait_timeout} -lt 1 ]; then
		err 1 "netwait_timeout must be >= 1"
	fi

	# Handle SIGINT (Ctrl-C); force abort of while() loop
	trap break SIGINT

	if [ -n "${netwait_if}" ]; then
		echo -n "Waiting for $netwait_if to have link"

		count=1
		while [ ${count} -le ${netwait_if_timeout} ]; do
			if output=`/sbin/ifconfig ${netwait_if} 2>/dev/null`; then
				link=`expr "${output}" : '.*[[:blank:]]status: \(no carrier\)'`
				if [ -z "${link}" ]; then
					echo '.'
					break
				fi
			else
				echo ''
				err 1 "ifconfig ${netwait_if} failed"
			fi
			sleep 1
			count=$((count+1))
		done
		if [ -n "${link}" ]; then
			# Restore default SIGINT handler
			trap - SIGINT

			echo ''
			warn "Interface still has no link.  Continuing with startup, but"
			warn "be aware you may not have a fully functional networking"
			warn "layer at this point."
			return
		fi
	fi

	# Handle SIGINT (Ctrl-C); force abort of while() loop
	trap break SIGINT

	for ip in ${netwait_ip}; do
		echo -n "Waiting for ${ip} to respond to ICMP"

		count=1
		while [ ${count} -le ${netwait_timeout} ]; do
			/sbin/ping -t 1 -c 1 -o ${ip} >/dev/null 2>&1
			rc=$?

			if [ $rc -eq 0 ]; then
				# Restore default SIGINT handler
				trap - SIGINT

				echo '.'
				return
			fi
			count=$((count+1))
		done
		echo ': No response from host.'
	done

	# Restore default SIGINT handler
	trap - SIGINT

	warn "Exhausted IP list.  Continuing with startup, but be aware you may"
	warn "not have a fully functional networking layer at this point."
}

load_rc_config $name
run_rc_command "$1"

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