unified preinit environment

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7173 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/brcm-2.4/base-files/default/etc/preinit.arch

@@ -0,0 +1,87 @@
+. /etc/functions.sh
+
+failsafe_ip() {
+	ifconfig $ifname 192.168.1.1 netmask 255.255.255.0 broadcast 192.168.1.255 up
+}
+
+failsafe() {
+	lock /tmp/.failsafe
+	failsafe_ip
+
+	echo "0 1 2 3 4 5u*" > /proc/switch/eth0/vlan/0/ports
+	
+	set_state failsafe
+	[ -x "/usr/sbin/nvram" ] && {
+		[ "$(nvram get boot_wait)" != "on" ] && {
+			nvram set boot_wait=on
+			nvram commit
+		}
+	}
+
+	netmsg 192.168.1.255 "Entering Failsafe!"
+	telnetd -l /bin/login <> /dev/null 2>&1
+
+	ash --login
+}
+
+mount none /proc -t proc
+
+if grep devfs /proc/filesystems > /dev/null; then
+	mount none /dev -t devfs
+	M0=/dev/pty/m0
+	M1=/dev/pty/m1
+	HOTPLUG=/sbin/hotplug-call
+else
+	mount -t sysfs none /sys
+	mount -t tmpfs tmpfs /dev -o size=512K
+	mknod /dev/console c 5 1
+	mkdir /dev/shm
+	/sbin/hotplug2 --no-persistent --coldplug --set-rules-file /etc/hotplug2-init.rules
+	M0=/dev/ptmx
+	M1=/dev/ptmx
+	HOTPLUG=
+fi
+mkdir -p /dev/pts
+mount none /dev/pts -t devpts
+
+# the shell really doesn't like having stdin/out closed
+# that's why we use /dev/pty/m0 and m1 as replacement
+# for /dev/console if there's no serial console available
+dd if=/dev/console of=/dev/null bs=1 count=0 >/dev/null 2>/dev/null || \
+	exec <$M0 >$M1 2>&0
+
+insmod diag
+set_state preinit
+trap 'FAILSAFE=true' USR1
+echo '/sbin/hotplug.failsafe' > /proc/sys/kernel/hotplug
+
+ifname=eth0
+
+# hardware specific overrides
+case "$(cat /proc/diag/model)" in
+	"Linksys WAP54G V1") ifname=eth1;;
+	"ASUS WL-HDD") ifname=eth1;;
+	"ASUS WL-300g") ifname=eth1;;
+	"ASUS (unknown, BCM4702)") ifname=eth1;;
+esac
+
+failsafe_ip
+
+insmod switch-core
+insmod switch-robo || insmod switch-adm || rmmod switch-core
+
+[ -d /proc/switch/eth0 ] && {
+	echo 1 > /proc/switch/eth0/reset
+
+	# this would be easier if we blasted the message across all ports
+	# but we don't want packets leaking across interfaces
+	for port in $(seq 0 4); do {
+		echo "$port 5u*" > /proc/switch/eth0/vlan/0/ports
+		netmsg 192.168.1.255 "Press reset now, to enter Failsafe!"
+	}; done
+} || netmsg 192.168.1.255 "Press reset now, to enter Failsafe!"
+
+sleep 2
+echo "$HOTPLUG" > /proc/sys/kernel/hotplug
+
+ifconfig $ifname 0.0.0.0 down