1 files changed, 136 insertions, 0 deletions

diff --git a/meta/recipes-core/initrdscripts/initramfs-framework/init b/meta/recipes-core/initrdscripts/initramfs-framework/init
new file mode 100755
index 0000000000..fc4b0db4b4
--- /dev/null
+++ b/meta/recipes-core/initrdscripts/initramfs-framework/init
@@ -0,0 +1,136 @@
+#!/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 start a endless loop
+fatal() {
+    echo $1 >/dev/console
+    echo >/dev/console
+
+        while [ "true" ]; do
+                sleep 3600
+        done
+}
+
+# Variables shared amoung modules
+ROOTFS_DIR="/rootfs" # where to do the switch root
+MODULE_PRE_HOOKS=""  # functions to call before running each module
+MODULE_POST_HOOKS="" # functions to call after running each module
+MODULES_DIR=/init.d  # place to look for modules
+
+# initialize /proc and /sys
+mkdir -p /proc /sys
+mount -t proc proc /proc
+mount -t sysfs sysfs /sys
+
+# populate bootparam environment
+for p in `cat /proc/cmdline`; do
+        opt="${p%%=*}"
+        opt=${opt/-/_}
+        if [ "${p/=/}" = "$p" ]; then
+                eval "bootparam_${opt}=true"
+        else
+                eval "bootparam_${opt}=\"${p#*=}\""
+        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 $MODULES_DIR/*; do
+        # Skip backup files
+        if [ "${m/\~/}" != "$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
+        source $m
+
+        if ! eval "${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."