From 19f592c3a16ce40450d16cd8ef3794fc857b6f9d Mon Sep 17 00:00:00 2001
From: Qiyang Sun <qs2g22@soton.ac.uk>
Date: Fri, 2 Aug 2024 00:52:06 +0100
Subject: [PATCH] Add fastinit to replace sysvinit
---
recipes-core/fastinit/fastinit.bb | 14 +++++
recipes-core/fastinit/files/fastinit.sh | 73 ++++++++++++++++++++++++
recipes-core/images/mar-image-minimal.bb | 6 +-
3 files changed, 88 insertions(+), 5 deletions(-)
create mode 100644 recipes-core/fastinit/fastinit.bb
create mode 100755 recipes-core/fastinit/files/fastinit.sh
diff --git a/recipes-core/fastinit/fastinit.bb b/recipes-core/fastinit/fastinit.bb
new file mode 100644
index 0000000..1d97a8d
--- /dev/null
+++ b/recipes-core/fastinit/fastinit.bb
@@ -0,0 +1,14 @@
+SUMMARY = "Installs fast init script to replace SysVinit"
+LICENSE = "CLOSED"
+
+SRC_URI = "file://fastinit.sh"
+
+S = "${WORKDIR}"
+
+do_install() {
+ install -d ${D}/usr/sbin
+ install -m 0755 ${WORKDIR}/fastinit.sh ${D}/usr/sbin/
+}
+
+FILES:${PN} = "/usr/sbin/fastinit.sh"
+
diff --git a/recipes-core/fastinit/files/fastinit.sh b/recipes-core/fastinit/files/fastinit.sh
new file mode 100755
index 0000000..059a909
--- /dev/null
+++ b/recipes-core/fastinit/files/fastinit.sh
@@ -0,0 +1,73 @@
+#!/bin/sh
+
+trap 'exec /sbin/poweroff -f' TERM
+trap 'exec /sbin/reboot -f' INT HUP
+
+log_to_kernel() {
+ echo "<4>fastinit: $1" > /dev/kmsg
+}
+
+warn_to_kernel() {
+ echo "<2>fastinit: $1" > /dev/kmsg
+}
+
+crit_to_kernel() {
+ echo "<1>fastinit: $1" > /dev/kmsg
+}
+
+level_zero() {
+ exec /sbin/poweroff -f
+}
+
+level_one() {
+ log_to_kernel "mounting filesystems"
+ mount -t proc proc /proc
+ mount -t sysfs sysfs /sys
+ mount -o ro /dev/mmcblk0p1 /boot
+
+ log_to_kernel "getting teletypes on ttyS0"
+ /sbin/getty -L 115200 ttyS0 vt100
+}
+
+level_five() {
+ exec /sbin/init 5
+}
+
+level_six() {
+ exec /sbin/reboot -f
+}
+
+runlevel=$1
+
+if [ -z "$runlevel" ]; then
+ warn_to_kernel "cannot read runlevel from argument"
+ warn_to_kernel "please edit cmdline.txt in bootfs"
+ warn_to_kernel "usage: init=/usr/sbin/fastinit RUNLEVEL"
+else
+ case $runlevel in
+ 0)
+ log_to_kernel "entering runlevel 0 (halt)"
+ level_zero
+ ;;
+ 1)
+ log_to_kernel "entering runlevel 1 (minimal)"
+ level_one
+ ;;
+ 5)
+ log_to_kernel "entering runlevel 5 (sysvinit)"
+ level_five
+ ;;
+ 6)
+ log_to_kernel "entering runlevel 6 (reboot)"
+ level_six
+ ;;
+ *)
+ warn_to_kernel "Runlevel $runlevel not implemented"
+ warn_to_kernel "usage: /usr/sbin/fastinit RUNLEVEL"
+ ;;
+ esac
+fi
+
+crit_to_kernel "host is up and ready"
+
+exit 0
diff --git a/recipes-core/images/mar-image-minimal.bb b/recipes-core/images/mar-image-minimal.bb
index 84a3d9b..30a2700 100644
--- a/recipes-core/images/mar-image-minimal.bb
+++ b/recipes-core/images/mar-image-minimal.bb
@@ -2,15 +2,11 @@ SUMMARY = "A small image just capable of allowing a device to boot."
IMAGE_INSTALL = "packagegroup-core-boot \
packagegroup-base-extended \
- zeromq \
python3 \
- python3-pyzmq \
python3-pyserial \
- connman \
- connman-client \
screen \
- serial-usb \
usb-modeswitch \
+ fastinit \
serial-usb \
${CORE_IMAGE_EXTRA_INSTALL}"
--
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