Add --real-root=<foo> parameter to specify a default for real_root= in the initramfs for gentoo bug #249783

ChangeLog

@@ -2,6 +2,11 @@
 # Copyright 1999-2008 Gentoo Foundation; 2008 Chris Gianelloni, Andrew Gaffney
 # Distributed under the GPL v2
 
+  13 Dec 2008; Andrew Gaffney <agaffney@gentoo.org> defaults/linuxrc,
+  gen_cmdline.sh, gen_determineargs.sh, gen_initramfs.sh:
+  Add --real-root=<foo> parameter to specify a default for real_root= in the
+  initramfs for gentoo bug #249783
+
   12 Dec 2008; Andrew Gaffney <agaffney@gentoo.org> -arch/alpha/busy-config,
   -arch/arm/busy-config, -arch/ia64/busy-config, -arch/mips/busy-config,
   -arch/parisc/busy-config, -arch/parisc64/busy-config,

defaults/linuxrc

@@ -41,7 +41,6 @@ quiet_kmsg
 
 CMDLINE=`cat /proc/cmdline`
 # Scan CMDLINE for any specified real_root= or cdroot arguments
-REAL_ROOT=''
 FAKE_ROOT=''
 REAL_ROOTFLAGS=''
 CRYPT_SILENT=0

gen_cmdline.sh

@@ -92,6 +92,7 @@ longusage() {
   echo "    --no-busybox    Do not include busybox in the initramfs."
   echo "    --unionfs       Include support for unionfs"
   echo "    --netboot		Create a self-contained env in the initramfs"
+  echo "    --real-root=<foo>	Specify a default for real_root=
   echo "  Internals"
   echo "	--arch-override=<arch>	Force to arch instead of autodetect"
   echo "	--cachedir=<dir>	Override the default cache location"
@@ -254,6 +255,10 @@ parse_cmdline() {
 			CMD_NETBOOT=1
 			print_info 2 "CMD_NETBOOT: ${CMD_NETBOOT}"
 			;;
+		--real-root=*)
+			CMD_REAL_ROOT=`parse_opt "$*"`
+			print_info 2 "CMD_REAL_ROOT: ${CMD_REAL_ROOT}"
+			;;
 		--slowusb)
 			CMD_SLOWUSB=1
 			print_info 2 "CMD_SLOWUSB: ${CMD_SLOWUSB}"

gen_determineargs.sh

@@ -105,6 +105,7 @@ determine_real_args() {
 	set_config_with_override 1 BUSYBOX              CMD_BUSYBOX              "yes"
 	set_config_with_override 1 UNIONFS				CMD_UNIONFS
 	set_config_with_override 1 NETBOOT				CMD_NETBOOT
+	set_config_with_override 2 REAL_ROOT			CMD_REAL_ROOT
 	set_config_with_override 1 DISKLABEL            CMD_DISKLABEL
 	set_config_with_override 1 LUKS                 CMD_LUKS
 	set_config_with_override 1 MDADM                CMD_MDADM

gen_initramfs.sh

@@ -452,6 +452,11 @@ append_auxilary() {
 		cp "${GK_SHARE}/defaults/initrd.defaults" "${TEMP}/initramfs-aux-temp/etc/initrd.defaults"
 	fi
 
+	if [ -n "${REAL_ROOT}" ]
+	then
+		sed -i "s/^REAL_ROOT=.*$/REAL_ROOT='${REAL_ROOT}'/" "${TEMP}/initramfs-aux-temp/etc/initrd.defaults"
+	fi
+	
 	echo -n 'HWOPTS="$HWOPTS ' >> "${TEMP}/initramfs-aux-temp/etc/initrd.defaults"	
 	for group_modules in ${!MODULES_*}; do
 		group="$(echo $group_modules | cut -d_ -f2 | tr "[:upper:]" "[:lower:]")"