From a94da017797e82d62484ffbced93108ce5830de1 Mon Sep 17 00:00:00 2001
From: Dmitry Eremin-Solenikov <dmitry_eremin@mentor.com>
Date: Thu, 2 Apr 2015 18:23:01 +0300
Subject: initramfs-debug: add simple init script for debugging

Add a tiny simple debug script that will mount all available virtual
file systems and then execute a shell.

Signed-off-by: Dmitry Eremin-Solenikov <dmitry_eremin@mentor.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
---
 .../recipes-bsp/initrdscripts/files/init-debug.sh  | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 meta-initramfs/recipes-bsp/initrdscripts/files/init-debug.sh

(limited to 'meta-initramfs/recipes-bsp/initrdscripts/files/init-debug.sh')

diff --git a/meta-initramfs/recipes-bsp/initrdscripts/files/init-debug.sh b/meta-initramfs/recipes-bsp/initrdscripts/files/init-debug.sh
new file mode 100644
index 0000000000..7edbd70cb0
--- /dev/null
+++ b/meta-initramfs/recipes-bsp/initrdscripts/files/init-debug.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+
+PATH=/sbin:/bin:/usr/sbin:/usr/bin
+
+do_mount_fs() {
+	grep -q "$1" /proc/filesystems || return
+	test -d "$2" || mkdir -p "$2"
+	mount -t "$1" "$1" "$2"
+}
+
+do_mknod() {
+	test -e "$1" || mknod "$1" "$2" "$3" "$4"
+}
+
+mkdir -p /proc
+mount -t proc proc /proc
+
+do_mount_fs sysfs /sys
+do_mount_fs debugfs /sys/kernel/debug
+do_mount_fs devtmpfs /dev
+do_mount_fs devpts /dev/pts
+do_mount_fs tmpfs /dev/shm
+
+mkdir -p /run
+mkdir -p /var/run
+
+do_mknod /dev/console c 5 1
+do_mknod /dev/null c 1 3
+do_mknod /dev/zero c 1 5
+
+exec sh </dev/console >/dev/console 2>/dev/console 
-- 
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