add settings to enable readonly fs

conf/layer.conf

@@ -15,8 +15,7 @@ LAYERSERIES_COMPAT_meta-rpi-diya = "mickledore"
 PACKAGE_CLASSES = "package_ipk"
 INHERIT += "rm_work"
 
-EXTRA_IMAGE_FEATURES ?= " ssh-server-dropbear "
+EXTRA_IMAGE_FEATURES ?= " ssh-server-dropbear read-only-rootfs "
-# disable readonly fs read-only-rootfs
 # ssh-server-dropbear
 DISTRO_FEATURES:append := " vc4-gfx opengl "
 # DISTRO_FEATURES:append := " vc4-gfx opengl directfb "

recipes-core/dropbear/files/default

@@ -1,2 +1,2 @@
 DROPBEAR_EXTRA_ARGS="-w"
-DROPBEAR_RSAKEY_DIR=/home/diya/etc/dropbear
+DROPBEAR_RSAKEY_DIR=/var/etc/dropbear

recipes-core/init-ifupdown/files/interfaces

@@ -0,0 +1,3 @@
+allow-hotplug wlan0
+iface wlan0 inet dhcp
+    wpa-conf /var/etc/network/wpa_supplicant.conf

recipes-core/init-ifupdown/init-ifupdown_%.bbappend

@@ -1,3 +1,9 @@
+FILESEXTRAPATHS:prepend := "${THISDIR}/files:"
+SRC_URI += "file://interfaces"
+
 do_install:append () {
     rm ${D}/etc/network/interfaces
+    install -d ${D}/var/etc/
+    install -d ${D}/var/etc/network
+    install -m 0644 ${WORKDIR}/interfaces ${D}/var/etc/network
 }

recipes-diya/diya-overlay/files/80_diya

@@ -1,2 +1,4 @@
-l root root 0644 /etc/network/interfaces /home/diya/etc/network/interfaces
+d root root 0755 /var/etc/network none
-l root root 0644 /etc/dropbear /home/diya/etc/dropbear
+d root root 0755 /var/etc/dropbear none
+l root root 0644 /etc/network/interfaces /var/etc/network/interfaces
+l root root 0644 /etc/dropbear /var/etc/dropbear

recipes-diya/diya-overlay/files/confd

@@ -25,9 +25,9 @@ case "$1" in
             chown -R diya:diya /home/diya
             rm /boot/home_partition_should_be_formated
         fi
-        if [ -e "/boot/install" ];then
+        if [ -e "/boot/wpa_supplicant.conf" ];then
-            cp -rf /boot/install/* /home/diya
+            install -m 0644 /boot/wpa_supplicant.conf /var/etc/network
-            rm -rf /boot/install
+            rm /boot/wpa_supplicant.conf
             reboot
         fi
         # display information

recipes-diya/diya-overlay/files/expandfs.sh

@@ -1,6 +1,6 @@
 #! /bin/sh
 line=$(
-sed -e 's/\s*\([\+0-9a-zA-Z]*\).*/\1/' << EOF | fdisk /dev/mmcblk0 | grep /dev/mmcblk0p3
+sed -e 's/\s*\([\+0-9a-zA-Z]*\).*/\1/' << EOF | fdisk /dev/mmcblk0 | grep /dev/mmcblk0p4
 p
 q
 EOF
@@ -18,11 +18,11 @@ fi
 
 echo "Expanding the partition"
 sed -e 's/\s*\([\+0-9a-zA-Z]*\).*/\1/' << EOF | fdisk /dev/mmcblk0
-d
+d # delete partition
-3
+4 # number 4
 n # new partition
 p # primary partition
-3 # partition number 3
+4 # partition number 4
 $start_sector
   # default - end of disk 
 p # print the in-memory partition table

recipes-extended/sudo/sudo_%.bbappend

@@ -0,0 +1,4 @@
+do_install:append() {
+    # grant all permission to sudo group
+    sed -i 's/^#\s*\(%sudo\s*ALL=(ALL:ALL)\s*ALL\)/\1/'  ${D}/${sysconfdir}/sudoers
+}

wic/rpi.wks.in

@@ -2,7 +2,11 @@
 # long-description: Creates a partitioned SD card image for use with
 # Raspberry Pi. Boot files are located in the first vfat partition.
 
-part /boot --source bootimg-partition --ondisk mmcblk0 --fstype=vfat --label boot --active --align 4096 --size 50
+part /boot --source bootimg-partition --ondisk mmcblk0 --fstype=vfat --label boot --active --align 4096 --size 32
+# read only roofs
 part / --source rootfs --ondisk mmcblk0 --fstype=ext4 --label root --align 4096 --size 150
+# modifiable configurations stored in /var/etc
+part /var/etc --source rootfs --rootfs-dir=${IMAGE_ROOTFS}/var/etc --ondisk mmcblk0 --fstype=ext4 --label home --align 1024 --size 32
+# home partition
 part /home --source rootfs --rootfs-dir=${IMAGE_ROOTFS}/home --ondisk mmcblk0 --fstype=ext4 --label home --align 1024 --size 16
 # part /home --ondisk mmcblk0 --fstype=vfat --label music --active --align 1024 --size 16