overlay/sys-kernel/genkernel/files/3.4.11/genkernel-3.4.10.907-mdev_chroot_dev-1.patch

Submitted By: Mario Fetka (mario dot fetka at gmail dot com)
Date: 2010-10-30
Initial Package Version: 3.4.10.907
Origin: gentoo busybox mdev-start.sh and me
Upstream Status: unknown
Description: add a new boot command 'nashack' that creates the missing dev entries
 
diff -Naur genkernel-3.4.10.907.orig/defaults/initrd.scripts genkernel-3.4.10.907/defaults/initrd.scripts
--- genkernel-3.4.10.907.orig/defaults/initrd.scripts	2010-10-29 16:11:03.765695917 +0000
+++ genkernel-3.4.10.907/defaults/initrd.scripts	2010-10-29 21:14:39.022515391 +0000
@@ -284,9 +284,60 @@
 	/bin/ash
 }
 
+seed_chroot_dev()
+{
+	# Seed /dev with some things that we know we need
+
+	# Create problematic directories
+	mkdir -p ${CHROOT}/dev/pts ${CHROOT}/dev/shm
+
+	# creating /dev/console and /dev/tty1 to be able to write
+	# to $CONSOLE with/without bootsplash before mdev creates it
+	[ -c ${CHROOT}/dev/console ] || mknod ${CHROOT}/dev/console c 5 1
+	[ -c ${CHROOT}/dev/tty1 ] || mknod ${CHROOT}/dev/tty1 c 4 1
+
+	# udevd will dup its stdin/stdout/stderr to /dev/null
+	# and we do not want a file which gets buffered in ram
+	[ -c ${CHROOT}/dev/null ] || mknod ${CHROOT}/dev/null c 1 3
+
+	# creating /dev/initctl to be able to switch init
+	[ -c ${CHROOT}/dev/initctl ] || mknod ${CHROOT}/dev/initctl p
+}
+
+seed_dev()
+{
+	# Seed /dev with some things that we know we need
+
+	# creating /dev/console and /dev/tty1 to be able to write
+	# to $CONSOLE with/without bootsplash before mdev creates it
+	[ -c /dev/console ] || mknod /dev/console c 5 1
+	[ -c /dev/tty1 ] || mknod /dev/tty1 c 4 1
+
+	# udevd will dup its stdin/stdout/stderr to /dev/null
+	# and we do not want a file which gets buffered in ram
+	[ -c /dev/null ] || mknod /dev/null c 1 3
+
+	# copy over any persistant things
+	if [ -d /lib/mdev/devices ] ; then
+		cp -RPp /lib/mdev/devices/* /dev 2>/dev/null
+	fi
+
+	# Not provided by sysfs but needed
+	ln -snf /proc/self/fd /dev/fd
+	ln -snf fd/0 /dev/stdin
+	ln -snf fd/1 /dev/stdout
+	ln -snf fd/2 /dev/stderr
+	[ -e /proc/kcore ] && ln -snf /proc/kcore /dev/core
+
+	# Create problematic directories
+	mkdir -p /dev/pts /dev/shm
+}
+
 runmdev() {
 	# busybox udev replacement
 	mdev -s
+	# add missing dev entrys for nas devices without console
+	seed_dev
 }
 
 test_success() {
@@ -1093,3 +1144,5 @@
 		USE_UNIONFS_NORMAL=0
 	fi
 }
+
+
diff -Naur genkernel-3.4.10.907.orig/defaults/linuxrc genkernel-3.4.10.907/defaults/linuxrc
--- genkernel-3.4.10.907.orig/defaults/linuxrc	2010-10-29 16:11:03.762695924 +0000
+++ genkernel-3.4.10.907/defaults/linuxrc	2010-10-30 07:31:00.700222780 +0000
@@ -62,6 +62,10 @@
 		init_opts\=*)
 			INIT_OPTS=`parse_opt "${x}"`
 		;;
+		# remount chroot rw and create missing files
+		nashack)
+			NASHACK=1
+		;;
 		# Livecd options
 		cdroot)
 			CDROOT=1
@@ -731,6 +735,17 @@
 
 verbose_kmsg
 
+# create the missing dev entrys for the nas boxes if the don't exist
+if [ "${NASHACK}" = '1' ]
+then
+	if [ ! -e "${CHROOT}/dev/console" ] || [ ! -e "${CHROOT}/dev/null" ]
+	then
+		mount -o remount,rw ${CHROOT} >/dev/null 2>&1
+		seed_chroot_dev
+		mount -o remount,ro ${CHROOT} >/dev/null 2>&1
+	fi
+fi
+
 echo -ne "${GOOD}>>${NORMAL}${BOLD} Booting (initramfs)${NORMAL}"
 if [ ! -e "${CHROOT}/dev/console" ] || [ ! -e "${CHROOT}/dev/null" ]
 then