From 51c1b427ec838530a695495bd62e2b196d36cb33 Mon Sep 17 00:00:00 2001
From: Jan Luebbe <jluebbe@debian.org>
Date: Wed, 27 May 2015 22:53:00 +0200
Subject: [PATCH] initramfs-framework: override init file to reboot on error

The initramfs-framework from oe-core performs an endless loop of "sleep
3600" when fatal() is called. We need to reboot instead.

Signed-off-by: Jan Luebbe <jluebbe@debian.org>
---
 .../initrdscripts/initramfs-framework/init    | 139 ++++++++++++++++++
 .../initramfs-framework_sysmocom.inc          |   4 +
 yocto-shared/initramfs-framework_1.0.bbappend |   1 +
 3 files changed, 144 insertions(+)
 create mode 100755 recipes-core/initrdscripts/initramfs-framework/init
 create mode 100644 recipes-core/initrdscripts/initramfs-framework_sysmocom.inc
 create mode 100644 yocto-shared/initramfs-framework_1.0.bbappend

diff --git a/recipes-core/initrdscripts/initramfs-framework/init b/recipes-core/initrdscripts/initramfs-framework/init
new file mode 100755
index 0000000..fc12991
--- /dev/null
+++ b/recipes-core/initrdscripts/initramfs-framework/init
@@ -0,0 +1,139 @@
+#!/bin/sh
+# Copyright (C) 2011 O.S. Systems Software LTDA.
+# Licensed on MIT
+#
+# Provides the API to be used by the initramfs modules
+#
+# Modules need to provide the following functions:
+#
+# <module>_enabled : check if the module ought to run (return 1 to skip)
+# <module>_run     : do what is need
+#
+# Boot parameters are available on environment in the as:
+#
+# 'foo=value' as 'bootparam_foo=value'
+# 'foo' as 'bootparam_foo=true'
+
+# Register a function to be called before running a module
+# The hook is called as:
+#   <function> pre <module>
+add_module_pre_hook() {
+	MODULE_PRE_HOOKS="$MODULE_PRE_HOOKS $1"
+}
+
+# Register a function to be called after running a module
+# The hook is called as:
+#   <function> post <module>
+add_module_post_hook() {
+	MODULE_POST_HOOKS="$MODULE_POST_HOOKS $1"
+}
+
+# Load kernel module
+load_kernel_module() {
+	if modprobe $1 >/dev/null 2>&1; then
+		info "Loaded module $1"
+	else
+		debug "Failed to load module $1"
+	fi
+}
+
+# Prints information
+msg() {
+	echo "$@" >/dev/console
+}
+
+# Prints information if verbose bootparam is used
+info() {
+	[ -n "$bootparam_verbose" ] && echo "$@" >/dev/console
+}
+
+# Prints information if debug bootparam is used
+debug() {
+	[ -n "$bootparam_debug" ] && echo "DEBUG: $@" >/dev/console
+}
+
+# Prints a message and exit (resulting in a panic)
+fatal() {
+    echo $1 >/dev/console
+    echo >/dev/console
+
+    msg "fatal error: rebooting"
+    reboot -f
+}
+
+# Variables shared amoung modules
+ROOTFS_DIR="/rootfs" # where to do the switch root
+MODULE_PRE_HOOKS=""  # functions to call before running each module
+MODULE_POST_HOOKS="" # functions to call after running each module
+MODULES_DIR=/init.d  # place to look for modules
+
+# make mount stop complaining about missing /etc/fstab
+touch /etc/fstab
+
+# initialize /proc, /sys and /var/lock
+mkdir -p /proc /sys /var/lock
+mount -t proc proc /proc
+mount -t sysfs sysfs /sys
+
+# populate bootparam environment
+for p in `cat /proc/cmdline`; do
+	opt=`echo $p | cut -d'=' -f1`
+	opt=`echo $opt | sed -e 's/-/_/'`
+	if [ "`echo $p | cut -d'=' -f1`" = "$p" ]; then
+		eval "bootparam_${opt}=true"
+	else
+		value="`echo $p | cut -d'=' -f2-`"
+		eval "bootparam_${opt}=\"${value}\""
+	fi
+done
+
+# use /dev with devtmpfs
+if grep -q devtmpfs /proc/filesystems; then
+	mkdir -p /dev
+	mount -t devtmpfs devtmpfs /dev
+else
+	if [ ! -d /dev ]; then
+		fatal "ERROR: /dev doesn't exist and kernel doesn't has devtmpfs enabled."
+	fi
+fi
+
+mkdir $ROOTFS_DIR
+
+# Load and run modules
+for m in $MODULES_DIR/*; do
+	# Skip backup files
+	if [ "`echo $m | sed -e 's/\~$//'`" != "$m" ]; then
+		continue
+	fi
+
+	module=`basename $m | cut -d'-' -f 2`
+	debug "Loading module $module"
+
+	# pre hooks
+	for h in $MODULE_PRE_HOOKS; do
+		debug "Calling module hook (pre): $h"
+		eval "$h pre $module"
+		debug "Finished module hook (pre): $h"
+	done
+
+	# process module
+	. $m
+
+	if ! eval "${module}_enabled"; then
+		debug "Skipping module $module"
+		continue
+	fi
+
+	debug "Running ${module}_run"
+	eval "${module}_run"
+
+	# post hooks
+	for h in $MODULE_POST_HOOKS; do
+		debug "Calling module hook (post): $h"
+		eval "$h post $module"
+		debug "Finished module hook (post): $h"
+	done
+done
+
+# Catch all
+fatal "ERROR: Initramfs failed to initialize the system."
diff --git a/recipes-core/initrdscripts/initramfs-framework_sysmocom.inc b/recipes-core/initrdscripts/initramfs-framework_sysmocom.inc
new file mode 100644
index 0000000..2d0b9ee
--- /dev/null
+++ b/recipes-core/initrdscripts/initramfs-framework_sysmocom.inc
@@ -0,0 +1,4 @@
+THISDIR := "${@os.path.dirname(bb.data.getVar('FILE', d, True))}"
+FILESPATH =. "${@base_set_filespath(["${THISDIR}/${PN}"], d)}:"
+
+PRINC="4"
diff --git a/yocto-shared/initramfs-framework_1.0.bbappend b/yocto-shared/initramfs-framework_1.0.bbappend
new file mode 100644
index 0000000..69d3d84
--- /dev/null
+++ b/yocto-shared/initramfs-framework_1.0.bbappend
@@ -0,0 +1 @@
+require recipes-core/initrdscripts/${PN}_sysmocom.inc