From ad7e5029cf1a5577a620c250782cac8bbea4af5e Mon Sep 17 00:00:00 2001
From: davidovski <david@davidovski.xyz>
Date: Sat, 12 Mar 2022 22:33:23 +0000
Subject: added mkinitramfs

---
 src/mkinitramfs.sh | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100755 src/mkinitramfs.sh

(limited to 'src/mkinitramfs.sh')

diff --git a/src/mkinitramfs.sh b/src/mkinitramfs.sh
new file mode 100755
index 0000000..c3d00be
--- /dev/null
+++ b/src/mkinitramfs.sh
@@ -0,0 +1,77 @@
+#!/bin/sh
+
+BUILD=/tmp/ramfs
+OUT=/boot/initrd.img
+
+
+# create base directory structure
+printf "creating directories..."
+
+mkdir -p $BUILD/tmp
+cd $BUILD
+mkdir -p bin dev etc lib proc run sbin sys usr
+mkdir -p lib/firmware lib/modules lib/udev
+mkdir -p etc/modprobe.d etc/udev
+
+ln -s lib lib64
+ln -s ../bin usr/bin
+ln -s ../sbin usr/sbin
+printf "OK\n"
+
+# copy binaries
+printf "populating /bin..."
+for b in dash cat cp dd killall kmod ln ls mkdir \
+    mknod mount rm sed sh sleep umount uname \
+    basename readlink; do
+    cp -a /bin/$b bin/
+done
+
+ln -s kmod bin/insmod
+ln -s kmod bin/lsmod
+printf "OK\n"
+
+# create nodes for udev to mount
+printf "creating nodes..."
+mknod -m 600 dev/console c 5 1
+mknod -m 666 dev/null c 1 3
+printf "OK\n"
+
+# Copy udev configuration
+printf "configuring udev..."
+cp  /etc/udev/udev.conf etc/udev/
+cp -r /etc/udev/rules.d   etc/udev/
+cp -r /lib/udev/*         lib/udev/
+printf "OK\n"
+
+# set module order
+touch etc/modprobe.d/modprobe.conf
+
+# copy the init script
+printf "installing init script..."
+cp /sbin/initramfs-init sbin/init
+printf "OK\n"
+
+# copy required libraries
+printf "populating /lib..."
+for l in libc acl attre blkid cap kmod lzma mount ncursesw readline z curses history terminfo zstd; do
+        cp /lib/lib$l.so lib/
+done
+ln -s libc.so /ld-musl-$(uname -m).so.1
+printf "OK\n"
+
+# copy any firmware
+printf "installing firmware..."
+cp -rv /lib/firmware/* lib/firmware/
+printf "OK\n"
+
+# copy any modules
+printf "installing modules..."
+cp  -rv /lib/modules/* lib/modules/
+printf "OK\n"
+
+# create the initramfs image
+printf "creating initramfs image..."
+find ./ | cpio -o -H newc | gzip -9 > $OUT
+printf "OK\n"
+
+printf "Written initramfs image to $OUT\n"
-- 
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