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From: Doug Barton <dougb@FreeBSD.org>
Date: Sun, 19 Jun 2011 22:59:54 +0000 (UTC)
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Subject: svn commit: r223311 - head/etc/rc.d
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Author: dougb
Date: Sun Jun 19 22:59:54 2011
New Revision: 223311
URL: http://svn.freebsd.org/changeset/base/223311

Log:
  Blah, forgot to svn add the actual script from r223310

Added:
  head/etc/rc.d/netwait   (contents, props changed)

Added: head/etc/rc.d/netwait
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ head/etc/rc.d/netwait	Sun Jun 19 22:59:54 2011	(r223311)
@@ -0,0 +1,97 @@
+#!/bin/sh
+
+# $FreeBSD$
+#
+# 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"
+rc_var=`set_rcvar`
+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"