Add a check after mounting NEW_ROOT to see if /dev exists and /sbin/init is executable before moving on

git-svn-id: svn+ssh://svn.gentoo.org/var/svnroot/genkernel/trunk@645 67a159dc-881f-0410-a524-ba9dfbe2cb84

ChangeLog

@@ -2,6 +2,10 @@
 # Copyright 2006-2008 Gentoo Foundation; Distributed under the GPL v2
 # $Header: $
 
+  13 Mar 2008; Andrew Gaffney <agaffney@gentoo.org> generic/linuxrc:
+  Add a check after mounting NEW_ROOT to see if /dev exists and /sbin/init is
+  executable before moving on
+
   13 Mar 2008; Andrew Gaffney <agaffney@gentoo.org> gen_initramfs.sh:
   Change the location we copy the intiramfs to for integrated initramfs
 

generic/linuxrc

@@ -402,8 +402,15 @@ do
 		# If mount is successful break out of the loop 
 		# else not a good root and start over.
 		if [ "$?" = '0' ]
+		then
+			if [ -d ${NEW_ROOT}/dev -a -x ${NEW_ROOT}/sbin/init ]
 			then
 				break
+			else
+				bad_msg "The filesystem mounted at ${REAL_ROOT} does not appear to be a valid /, try again"
+				got_good_root=0
+				REAL_ROOT=''
+			fi
 		else
 			bad_msg "Could not mount specified ROOT, try again"
 			got_good_root=0