common: add support for 'factory' to reset /rw/infix to defaults

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

board/common/rootfs/bin/help

@@ -25,6 +25,7 @@ ${H2}Services:${H0}
 
 ${H2}Tools:${H0}
   date    [-h]         Display current time, or sets the system date
+  factory              Factory reset the device (on the next boot)
   hwclock [-h]         Query or set the hardware clock (RTC)
   logout | Ctrl-D      Log out from TTY
   mdio | mvls          Low-level MDIO access, also for Marvell switch status

board/common/rootfs/etc/profile.d/factory.sh

@@ -0,0 +1 @@
+alias factory='read -N 1 -p "Factory reset requires a reboot, continue (y/N)? " yorn; echo; if [ "$yorn" = "y" ]; then touch /rw/infix/.reset; reboot; fi'

board/common/rootfs/lib/infix/mount-rw

@@ -12,7 +12,9 @@
 
 set -e
 
+nm=$(basename $0)
 err=0
+opt="-k"
 
 mount_rw()
 {
@@ -28,13 +30,25 @@ mount_rw()
 if ! mount_rw; then
     err=1
 
-    logger -k -p user.crit -t "$(basename $0)" \
+    logger $opt -p user.crit -t "$nm" \
 	   "No persistent storage found for /rw, falling back to tmpfs."
 
     mount tmpfs-rw
 fi
 
+# fall back to console logging if sysklogd is too old
+if ! logger -? |grep -q "Log to kernel"; then
+    opt="-c"
+fi
+
 # Allow users in wheel group to write to /rw
 chgrp wheel /rw && chmod g+w   /rw
 
+# Check for factory reset
+if [ -f /rw/infix/.reset ]; then
+	logger $opt -p user.crit -t "$nm" "Resetting to factory defaults."
+	rm -rf /rw/infix/* /rw/infix/.reset
+	sync
+fi
+
 exit $err