From bfcf2bdef4c95afcc0588d14ca90dc16fabee896 Mon Sep 17 00:00:00 2001
From: Tomas M <tomas@slax.org>
Date: Sun, 2 Sep 2012 22:11:05 -0500
Subject: [PATCH] boot to bash

---
 .config                    | 11 ++----
 build                      | 25 ++++++++++---
 initramfs/initramfs_create | 77 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 99 insertions(+), 14 deletions(-)

diff --git a/.config b/.config
index 3808f80..49ed9cf 100644
--- a/.config
+++ b/.config
@@ -5,7 +5,7 @@
 # Live Kit Name. Defaults to 'mylinux';
 # For example, Slax changes it to 'slax'
 # Must not contain any spaces.
-LIVEKITNAME="mylinux"
+LIVEKITNAME="slax"
 
 # Kernel version. Change it to "3.2.28" for example, if you are building
 # Live Kit with a different kernel than the one you are actually running
@@ -19,17 +19,12 @@ MKMOD="bin etc home lib lib64 opt root sbin srv usr var"
 # List of files and directories you'd like to exclude from your Live Kit
 EXCLUDE="/etc/fstab /etc/mtab"
 
-# Temporary directory to store compressed directories
-# (the whole folder will be erased and recreated during build!)
-TMPDATA=/tmp/live_data_$$
+# Temporary directory to store livekit filesystem
+LIVEKITDATA=/tmp/livekit-data-$$
 
 # Bundle extension, for example 'sb' for .sb extension
 BEXT=sb
 
-# Change this variable if you installed your distro to some directory.
-# for example ROOT=/tmp/newdir. You may leave it empty, then it defaults to /
-ROOT=
-
 # Directory with kernel .ko modules, can be different in some distros
 LMK="lib/modules/$KERNEL"
 
diff --git a/build b/build
index 8fc04b7..3b30ec0 100755
--- a/build
+++ b/build
@@ -20,13 +20,26 @@ if [ "$(mksquashfs 2>&1 | grep "Xdict-size")" = "" ]; then
 fi
 
 # build initramfs image
+cd initramfs
+INITRAMFS=$(./initramfs_create "$LIVEKITNAME")
+cd ..
 
+# create live kit filesystem
+rm -Rf "$LIVEKITDATA"
+BOOT="$LIVEKITDATA"/"$LIVEKITNAME"/boot
+mkdir -p "$BOOT"
+cp bootfiles/isolinux.bin $BOOT
+cp bootfiles/vesamenu.c32 $BOOT
+mv "$INITRAMFS" $BOOT/initfs.img
+cat bootfiles/isolinux.cfg | sed -r "s:/boot/:/$LIVEKITNAME/boot/:" > $BOOT/isolinux.cfg
+cp /boot/vmlinuz $BOOT/
 
 # create compressed bundles
+# ...
 
-
-
-
-
-
-
+# create ISO for CD image (so I can test it)
+cd "$LIVEKITDATA"
+mkisofs -o "/tmp/iso.iso" -v -J -R -D -A "$LIVEKITNAME" -V "$LIVEKITNAME" \
+-no-emul-boot -boot-info-table -boot-load-size 4 \
+-b "$LIVEKITNAME"/boot/isolinux.bin -c "$LIVEKITNAME"/boot/isolinux.boot . \
+>/dev/null 2>/dev/null
diff --git a/initramfs/initramfs_create b/initramfs/initramfs_create
index a9bf588..36a3c85 100755
--- a/initramfs/initramfs_create
+++ b/initramfs/initramfs_create
@@ -1 +1,78 @@
 #!/bin/bash
+
+. ../.config
+
+# Automatically determine the architecture we're building on:
+if [ -z "$MYARCH" ]; then
+  case "$( uname -m )" in
+    i?86) export MYARCH=i486 ;;
+    arm*) export MYARCH=arm ;;
+    # Unless $MYARCH is already set, use uname -m for all other archs:
+       *) export MYARCH=$( uname -m ) ;;
+  esac
+fi
+
+INITRAMFS=/tmp/livekit-initramfs-$MYARCH-$$
+
+# copy file to initramfs tree, including
+# all library dependencies (as shown by ldd)
+# $1 = file to copy (full path)
+copy_including_deps()
+{
+   # if source doesn't exist or target exists, do nothing
+   if [ ! -e "$1" -o -e "$INITRAMFS"/"$1" ]; then
+      return
+   fi
+
+   cp -R --parents "$1" "$INITRAMFS"
+   if [ -L "$1" ]; then
+      DIR="$(dirname "$1")"
+      LNK="$(readlink "$1")"
+      copy_including_deps "$(cd "$DIR"; realpath "$LNK")"
+   fi
+
+   ldd "$1" 2>/dev/null | sed -r "s/.*=>|[(].*//g" | sed -r "s/^\\s+|\\s+\$//" \
+     | while read LIB; do
+        copy_including_deps "$LIB"
+     done
+
+   shift
+   if [ "$1" != "" ]; then
+       copy_including_deps "$@"
+   fi
+}
+
+rm -Rf $INITRAMFS
+mkdir -p $INITRAMFS/{bin,dev,etc,lib,lib64,mnt,proc,root,run,sbin,sys,tmp,usr,var/log}
+
+modprobe zram
+copy_including_deps /dev/zram0
+
+copy_including_deps /dev/console /dev/null /dev/fb0 /dev/zero
+copy_including_deps /dev/ram /dev/systty /dev/fuse
+copy_including_deps /dev/tty /dev/tty?
+copy_including_deps /bin/bash /bin/mount
+copy_including_deps /bin/ln /bin/cat /bin/ls /bin/free
+copy_including_deps /sbin/blkid /sbin/swapon /sbin/mkswap /sbin/modprobe
+copy_including_deps /bin/grep /bin/egrep /bin/cut /bin/tr
+copy_including_deps /sbin/lsmod
+copy_including_deps /sbin/fdisk
+
+#copy_including_deps /usr/bin/vi
+#copy_including_deps /usr/bin/strace
+
+copy_including_deps /$LMK/kernel/fs
+copy_including_deps /$LMK/kernel/drivers/staging/zram
+copy_including_deps /$LMK/modules.*
+
+depmod -b $INITRAMFS
+
+echo "root::0:0::/root:/bin/bash" >$INITRAMFS/etc/passwd
+touch $INITRAMFS/etc/{m,fs}tab
+
+cp init $INITRAMFS/
+chmod a+x $INITRAMFS/init
+
+cd $INITRAMFS
+find . -print | cpio -o -H newc 2>/dev/null | gzip -f --best >$INITRAMFS.img
+echo $INITRAMFS.img