3 files changed, 176 insertions, 0 deletions

diff --git a/recipes/initramfs-basic/files/init.sh b/recipes/initramfs-basic/files/init.sh
new file mode 100644
index 0000000..3db235b
--- /dev/null
+++ b/recipes/initramfs-basic/files/init.sh
@@ -0,0 +1,102 @@
+#!/bin/sh
+
+PATH=/sbin:/bin:/usr/sbin:/usr/bin
+ROOT_MOUNT="/sysroot/"
+ROOT_DEVICE=""
+
+early_setup() {
+
+    mkdir -p /proc
+    mkdir -p /sys
+    mount -t proc proc /proc
+    mount -t sysfs sysfs /sys
+    mount -t devtmpfs none /dev
+
+    mkdir -p /run
+    mkdir -p /var/run
+}
+
+read_args() {
+
+    for arg in $(cat /proc/cmdline); do
+        value=$(echo ${arg} | cut -s -f2- -d '=')
+        case $arg in
+            root=*)
+                root=$value
+                ;;
+            debugshell*)
+                if [ -z "$value" ]; then
+                     shelltimeout=30
+                else
+                     shelltimeout=$value
+                fi
+                ;;
+        esac
+    done
+
+    if [ -z "$root" ] ; then
+        debug_shell "No root= specified via kernel command line."
+    else
+        case $root in
+            LABEL=*)
+                label=${root#LABEL=}
+                ;;
+            *)
+                debug_shell "This init script only supports root=LABEL=* for specifying root file system, but root=$root was provided."
+                ;;
+        esac
+    fi
+}
+
+mount_rootfs() {
+
+    mkdir -p $ROOT_MOUNT
+    mount $ROOT_DEVICE $ROOT_MOUNT
+    mount -n --move /proc $ROOT_MOUNT/proc
+    mount -n --move /sys $ROOT_MOUNT/sys
+    mount -n --move /dev $ROOT_MOUNT/dev
+
+    exec switch_root $ROOT_MOUNT /sbin/init || debug_shell "Couldn't switch_root."
+}
+
+switch_real_root() {
+
+    echo "Searching for media..."
+    C=0
+    while true
+    do
+
+    rootfs=$(findfs LABEL=$label)
+    if [ -n "$rootfs" ] ; then
+        ROOT_DEVICE=$rootfs
+        mount_rootfs
+    fi
+
+    # don't wait for more than $shelltimeout seconds, if it's set
+    if [ -n "$shelltimeout" ]; then
+        echo -n " " $(( $shelltimeout - $C ))
+        if [ $C -ge $shelltimeout ]; then
+            debug_shell "Cannot find root file system."
+        fi
+        C=$(( C + 1 ))
+    fi
+
+    sleep 1
+    done
+}
+
+debug_shell() {
+
+    echo ${1}
+    echo "Dropping to a shell."
+    exec sh
+}
+
+main() {
+
+    early_setup
+    read_args
+    switch_real_root
+}
+
+main
diff --git a/recipes/initramfs-basic/init-basic.bb b/recipes/initramfs-basic/init-basic.bb
new file mode 100644
index 0000000..674e683
--- /dev/null
+++ b/recipes/initramfs-basic/init-basic.bb
@@ -0,0 +1,34 @@
+##############################################################################
+##
+## Copyright (C) 2016 The Qt Company Ltd.
+## Contact: http://www.qt.io/licensing/
+##
+## This file is part of the Boot to Qt meta layer.
+##
+## $QT_BEGIN_LICENSE:COMM$
+##
+## Commercial License Usage
+## Licensees holding valid commercial Qt licenses may use this file in
+## accordance with the commercial license agreement provided with the
+## Software or, alternatively, in accordance with the terms contained in
+## a written agreement between you and The Qt Company. For licensing terms
+## and conditions see http://www.qt.io/terms-conditions. For further
+## information use the contact form at http://www.qt.io/contact-us.
+##
+## $QT_END_LICENSE$
+##
+##############################################################################
+
+SUMMARY = "Simple init script that mounts root filesystem by label."
+LICENSE = "CLOSED"
+SRC_URI = "file://init.sh"
+
+S = "${WORKDIR}"
+
+do_install () {
+    install -m 0755 ${WORKDIR}/init.sh ${D}/init
+}
+
+inherit allarch
+
+FILES_${PN} += "/init"
diff --git a/recipes/initramfs-basic/initramfs-basic.bb b/recipes/initramfs-basic/initramfs-basic.bb
new file mode 100644
index 0000000..4bef9c8
--- /dev/null
+++ b/recipes/initramfs-basic/initramfs-basic.bb
@@ -0,0 +1,40 @@
+##############################################################################
+##
+## Copyright (C) 2016 The Qt Company Ltd.
+## Contact: http://www.qt.io/licensing/
+##
+## This file is part of the Boot to Qt meta layer.
+##
+## $QT_BEGIN_LICENSE:COMM$
+##
+## Commercial License Usage
+## Licensees holding valid commercial Qt licenses may use this file in
+## accordance with the commercial license agreement provided with the
+## Software or, alternatively, in accordance with the terms contained in
+## a written agreement between you and The Qt Company. For licensing terms
+## and conditions see http://www.qt.io/terms-conditions. For further
+## information use the contact form at http://www.qt.io/contact-us.
+##
+## $QT_END_LICENSE$
+##
+##############################################################################
+
+DESCRIPTION = "Basic initramfs image. Useful as a template for more advanced functionality."
+LICENSE = "CLOSED"
+
+# findfs from busybox fails to do its jobs, the full version from util-linux-findfs works fine
+PACKAGE_INSTALL = "init-basic busybox util-linux-findfs ${ROOTFS_BOOTSTRAP_INSTALL}"
+
+# Do not pollute the initramfs image with rootfs features
+IMAGE_FEATURES = ""
+
+export IMAGE_BASENAME = "initramfs-basic"
+IMAGE_LINGUAS = ""
+
+IMAGE_FSTYPES = "cpio.gz"
+inherit core-image
+
+IMAGE_ROOTFS_SIZE = "8192"
+
+BAD_RECOMMENDATIONS += "busybox-syslog"
+