initramfs-framework: provides a modular initramfs

Provides the API and modules for a modular initramfs. The currently
included modules are:

 * initramfs-module-debug adds support to dynamic debugging of
   initramfs using bootparams

 * initramfs-module-udev: enables udev usage

 * initramfs-module-mdev: enables mdev usage

 * initramfs-module-e2fs: adds support for ext4, ext3 and ext2
   filesystems

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

1 files changed, 46 insertions, 0 deletions

diff --git a/meta/recipes-core/initrdscripts/initramfs-framework/finish b/meta/recipes-core/initrdscripts/initramfs-framework/finish
new file mode 100755
index 0000000000..bedd803f10
--- /dev/null
+++ b/meta/recipes-core/initrdscripts/initramfs-framework/finish
@@ -0,0 +1,46 @@
+#!/bin/sh
+# Copyright (C) 2011 O.S. Systems Software LTDA.
+# Licensed on MIT
+
+finish_enabled() {
+	return 0
+}
+
+finish_run() {
+	if [ -n "$ROOTFS_DIR" ]; then
+		if [ -n "$bootparam_rootdelay" ]; then
+			debug "Sleeping for $rootdelay second(s) to wait root to settle..."
+			sleep $bootparam_rootdelay
+		fi
+
+		if [ -n "$bootparam_root" ]; then
+			debug "No e2fs compatible filesystem has been mounted, mounting $bootparam_root..."
+
+			if [ "${bootparam_root:0:5}" = "UUID=" ]; then
+				bootparam_root="/dev/disk/by-uuid/${bootparam_root/UUID=/}"
+			fi
+
+			if [ -e "$bootparam_root" ]; then
+				mount $bootparam_root $ROOTFS_DIR
+			else
+				debug "root '$bootparam_root' doesn't exist."
+			fi
+		fi
+
+		if [ ! -d $ROOTFS_DIR/dev ]; then
+			fatal "ERROR: There's no '/dev' on rootfs."
+		fi
+
+		info "Switching root to '$ROOTFS_DIR'..."
+
+		debug "Moving /dev, /proc and /sys onto rootfs..."
+		mount --move /dev $ROOTFS_DIR/dev
+		mount --move /proc $ROOTFS_DIR/proc
+		mount --move /sys $ROOTFS_DIR/sys
+
+		cd $ROOTFS_DIR
+		exec switch_root -c /dev/console $ROOTFS_DIR /sbin/init
+	else
+		debug "No rootfs has been set"
+	fi
+}