From 5024b3634f45ee9e65e0593dee27842f2bb9f880 Mon Sep 17 00:00:00 2001
From: Ludovic Pouzenc <ludovic@pouzenc.fr>
Date: Sat, 24 Dec 2016 15:35:54 +0100
Subject: busybox is now PID 1 and starts /etc/init.d/rcS (was /init script)

---
 make-boot-image.sh | 31 ++++++++++++++++++++++++-------
 1 file changed, 24 insertions(+), 7 deletions(-)

diff --git a/make-boot-image.sh b/make-boot-image.sh
index c7e1384..f1a8e5c 100755
--- a/make-boot-image.sh
+++ b/make-boot-image.sh
@@ -227,7 +227,7 @@ fi
 # Initial Ram Disk building (embed in kernel) #
 ###############################################
 if [ ! -d "$WORKDIR/initrd" ]
-then	mkdir -p "$WORKDIR/initrd/"{bin,dev,etc,mnt,root,proc,root,sbin,sys,run/lock,run/uftpd,tmp,var/log}
+then	mkdir -p "$WORKDIR/initrd/"{bin,dev,etc/init.d,mnt,root,proc,root,sbin,sys,run/lock,run/uftpd,tmp,var/log}
 	$ROOTCMD cp -a /dev/{null,console,tty1} "$WORKDIR/initrd/dev/"
 	$ROOTCMD chmod 1777 "$WORKDIR/initrd/run/lock"
 	ln -s "/proc/mounts" "$WORKDIR/initrd/etc/mtab"
@@ -239,6 +239,7 @@ if [ ! -f "$WORKDIR/initrd/bin/busybox" ]
 then	[ -f "$DLDIR/busybox" ] || $WGET -O "$DLDIR/busybox" "$BUSYBOX_BIN_URL"
 	cp "$DLDIR/busybox" "$WORKDIR/initrd/bin/busybox"
 	chmod +x "$WORKDIR/initrd/bin/busybox"
+	ln -s /bin/busybox "$WORKDIR/initrd/init"
 fi
 
 if [ ! -f "$WORKDIR/initrd/etc/keys.bmap" ]
@@ -317,12 +318,13 @@ then	[ -f "$DLDIR/nic-firmware.deb" ] || $WGET -O "$DLDIR/nic-firmware.deb" "$NI
 	find "$WORKDIR/initrd/lib/firmware/" \( -name 'ipw*' -o -name 'brcmfmac*' -o -name '*wifi*' \) -print0 | xargs -r0 rm -v
 fi
 
-cat > "$WORKDIR/initrd/funcs" <<"EOF"
+cat > "$WORKDIR/initrd/etc/init.d/funcs" <<"EOF"
 rescue_shell() {
 	echo "Something went wrong. Dropping to a shell."
-	setsid cttyhack sh
+	setsid cttyhack /bin/busybox sh
 	sync
 	umount /dev /sys /proc
+	#umount /dev/pts /dev /sys /proc
 	poweroff -d1 -f
 }
 
@@ -369,11 +371,26 @@ start_uftpd() {
 }
 EOF
 
-cat > "$WORKDIR/initrd/init" <<"EOF"
+cat > "$WORKDIR/initrd/etc/inittab" <<"EOF"
+# Custom init scripts
+::sysinit:/etc/init.d/rcS
+# Executes as root what is received via uftpd (no security at all)
+::respawn:/bin/sinkdo /run/uftpd /run/sink
+# Standard things follow
+::ctrlaltdel:/sbin/reboot
+::shutdown:/sbin/swapoff -a
+::shutdown:/bin/umount -a -r
+::restart:/sbin/init
+tty2::askfirst:/bin/sh
+tty3::askfirst:/bin/sh
+tty4::askfirst:/bin/sh
+EOF
+
+cat > "$WORKDIR/initrd/etc/init.d/rcS" <<"EOF"
 #!/bin/busybox sh
-echo "Initrd started"
+echo "rcS script started"
 # Load helper functions
-. /funcs
+. /etc/init.d/funcs
 # Trace execution
 set -v
 
@@ -405,7 +422,7 @@ start_uftpd
 # Remote control on telnet port (23). You could press Alt+F3 to have a shell.
 nc -ll -p 23 -e /bin/sh -i
 EOF
-chmod +x "$WORKDIR/initrd/init"
+chmod +x "$WORKDIR/initrd/etc/init.d/rcS"
 
 cat > "$WORKDIR/initrd/bin/sinkcat" <<"EOF"
 #!/bin/busybox sh
-- 
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