Network access via DHCP / PXELINUX BOOTIF

functions

@@ -71,7 +71,7 @@ want_lib(){
 	return 0
 }
 
-want_module(){
+want_module_internal(){
 	modinfo=$(grep "$1" "/lib/modules/$(uname -r)/modules.dep" | head -n 1)
 	modpath="/lib/modules/$(uname -r)/$(printf "%s" "$modinfo" | cut -d ":" -f 1)"
 	moddeps="$(printf "%s" "$modinfo" | cut -d ":" -f 2 | tr " " "\n")"
@@ -87,8 +87,13 @@ want_module(){
 
 	if [ -n "$moddeps" ]; then
 		for dep in $moddeps; do
-			want_module "$dep:"
+			want_module_internal "$dep:"
 		done
 	fi
 	return 0
 }
+
+want_module(){
+	printf "$1\n" >> modules
+	want_module_internal $1
+}

init

@@ -1,19 +1,58 @@
 #!/bin/busybox sh
+#set -x
 
+# Create directory structure if it doesn't already exist from the overlay
 for dir in bin dev etc lib lib64 mnt proc root sys usr/sbin usr/bin sbin; do
 	/bin/busybox mkdir -p "$dir"
 done
 
+# Install busybox links
 /bin/busybox --install -s
 
+# Create some more environment
 mount -t proc none /proc
 mount -t sysfs none /sys
 mount -t devtmpfs none /dev
 
+# Stop kernel messages
+printf "3 4 1 3" > /proc/sys/kernel/printk
+
+# Load kernel modules
+depmod
+cat modules | while read mod; do
+	modprobe "$mod"
+done
+
+# Bring up a network interface
+if [ -n "$BOOTIF" ]; then
+	mac=$(printf "%s" "$BOOTIF" | cut -d "-" -f 2- | tr "-" ":" | tr -d " \n")
+	for ifacepath in /sys/class/net/*; do
+		iface=$(basename "$ifacepath")
+		if [ -f "$ifacepath/address" ]; then
+			if [ "$mac" = "$(cat $ifacepath/address | tr -d " \n")" ]; then
+				printf "Boot interface recognized as %s, trying DHCP\n" "$iface"
+				ip l set dev "$iface" up
+				udhcpc -i "$iface" -s ./udhcpc.script
+				done=1
+			fi
+		fi
+	done
+	if [ -z "$done" ]; then
+		printf "Boot interface %s not found, not configured\n" "$mac"
+	fi
+else
+	for iface in /sys/class/net/*; do
+		ip l set dev "$iface" up
+	done
+
+	printf "Trying DHCP on all supported interfaces\n"
+	udhcpc -s ./udhcpc.script
+fi
+
 if [ -x "./main" ]; then
 	./main
 else
-	printf "This is jamdisk"
+	printf "This is jamdisk\n"
 	sh
 fi
 

jamdisk

@@ -36,6 +36,7 @@ fi
 
 printf "Installing init\n"
 cp init "$ROOT"
+cp udhcpc.script "$ROOT"
 
 printf "Building initial RAM filesystem\n"
 (cd "$ROOT"; find . -print0 | cpio --null -o --format=newc | gzip -9) > "$PROJECT.initrd"

stowaway.script

@@ -1,8 +1,19 @@
-want_bin rsync
+want_bin rsync                                                                 
 want_bin sfdisk
 want_bin whiptail
+want_bin partclone.btrfs
+want_bin partclone.dd   
+want_bin partclone.exfat
+want_bin partclone.extfs
+want_bin partclone.fat
+want_bin partclone.hfsp
+want_bin partclone.ntfs
+want_bin partclone.ntfsfixboot
+want_bin partclone.restore
+want_bin partclone.xfs
+want_bin partclone.chkimg
 
 want_module tg3
 want_module igb
-want_module e1000
 want_module e1000e
+want_module e1000

udhcpc.script

@@ -0,0 +1,30 @@
+#!/bin/sh
+
+case "$1" in
+	"deconfig")
+		ip l set dev "$interface" down
+		ip l set dev "$interface" up
+		;;
+	"renew")
+		ip a replace "$ip/$mask" dev "$interface"
+		echo "" > "/etc/resolv.conf"
+		for srv in $dns; do
+			printf "nameserver %s\n" "$srv" >> "/etc/resolv.conf"
+		done
+		for rtr in $router; do
+			ip r replace default via "$rtr" dev "$interface"
+		done
+		;;
+	"bound")
+		ip a add "$ip/$mask" dev "$interface"
+		for srv in $dns; do
+			printf "nameserver %s\n" "$srv" >> "/etc/resolv.conf"
+		done
+		for rtr in $router; do
+			ip r add default via "$rtr" dev "$interface"
+		done
+		;;
+	"nak")
+		printf "Failed to get a DHCP lease\n"
+		;;
+esac