main/busybox-initscripts: move udhcpc script from alpine-baselayout

Does not belong in the baselayout package

1 files changed, 108 insertions, 0 deletions

diff --git a/main/busybox-initscripts/default.script b/main/busybox-initscripts/default.script
new file mode 100644
index 000000000..c6cfbc5be
--- /dev/null
+++ b/main/busybox-initscripts/default.script
@@ -0,0 +1,108 @@
+#!/bin/sh
+
+# script for udhcpc
+# Copyright (c) 2008 Natanael Copa <natanael.copa@gmail.com>
+
+UDHCPC="/etc/udhcpc"
+UDHCPC_CONF="$UDHCPC/udhcpc.conf"
+
+RESOLV_CONF="/etc/resolv.conf"
+[ -f $UDHCPC_CONF ] && . $UDHCPC_CONF
+
+export broadcast
+export dns
+export domain
+export interface
+export ip
+export mask
+export metric
+export router
+export subnet
+
+export PATH=/usr/bin:/bin:/usr/sbin:/sbin
+
+run_scripts() {
+	local dir=$1
+	if [ -d $dir ]; then
+		for i in $dir/*; do
+			[ -f $i ] && $i
+		done
+	fi
+}
+
+deconfig() {
+	ip addr flush dev $interface
+}
+
+routes() {
+	[ -z "$router" ] && return
+	local gw metric
+	while ip route del default via dev $interface 2>/dev/null; do
+		:
+	done
+	metric=0
+	for gw in $router; do
+		route add default gw $gw dev $interface metric $metric
+		metric=$(( $metric + 1 ))
+	done
+}
+
+resolvconf() {
+	local i
+	if [ "$RESOLV_CONF" = "no" ] || [ "$RESOLV_CONF" = "NO" ] \
+			|| [ -z "$RESOLV_CONF" ]; then
+		return
+	fi
+	echo -n > "$RESOLV_CONF"
+	[ -n "$domain" ] && echo "search $domain" >> "$RESOLV_CONF"
+	for i in $dns; do
+		echo "nameserver $i" >> "$RESOLV_CONF"
+	done
+}
+
+bound() {
+	ip addr add $ip/$mask dev $interface
+	ip link set dev $interface up
+	routes
+	resolvconf
+}
+
+renew() {
+	if ! ip addr show dev $interface | grep $ip/$mask; then
+		ip addr flush dev $interface
+		ip addr add $ip/$mask dev $interface
+	fi
+
+	local i
+	for i in $router; do
+		if ! ip route show | grep ^default | grep $i; then
+			routes
+			break
+		fi
+	done
+
+	if ! grep "^search $domain"; then
+		resolvconf
+		return
+	fi
+	for i in $dns; do
+		if ! grep "^nameserver $i"; then
+			resolvconf
+			return
+		fi
+	done
+}
+
+case "$1" in
+	deconfig|renew|bound)
+		run_scripts $UDHCPC/pre-$1
+		$1
+		run_scripts $UDHCPC/post-$1
+		;;
+	*)
+		echo "Error: this script should be called from udhcpc" >&2
+		exit 1
+		;;
+esac
+exit 0
+