Modify reset button behavior

The default OpenWRT behavior for a long press of the reset button over 5 secs is to completely erase the changed files overlay on the squashfs filesystem.  This commit replaces that to only delete the rita dashboard password and to remove only the wifi config from the overlay directory.  It does not do anything regarding the SSH password.

This reset button change is optional and controlled by the ansible var
reset_button_alt. This is only enabled by default for hawk managed
images.

profiles/management/hawk-managed.yml

@@ -19,6 +19,10 @@ exit_wifi_ssid_five_ghz: AltheaExit-5
 wifi_disabled: 0
 wifi_key: ChangeMe
 copy_images: true
+# enables alterante reset button behavior, specifically instead of
+# resetting the device by deleting all overlay data it will reset the wifi config
+# and rita dashboard password, allowing access to the device without erasing it's data
+reset_button_alt: true
 
 password_auth: "no"
 

roles/build-config/defaults/main.yml

@@ -101,3 +101,9 @@ free_tier_throughput: 1000
 max_fee: 20000000
 full_nodes: ["https://dai.althea.net:443"]
 system_chain: "Xdai"
+
+# enables alterante reset button behavior
+# False: Default behavior, all overlay data is reset and the device is wiped
+# True: Instead of resetting the device by deleting all overlay data it will reset the wifi config
+# and rita dashboard password, allowing access to the device without erasing it's data
+reset_button_alt: false

roles/build-config/tasks/main.yml

@@ -23,6 +23,18 @@
     mode: 0600
   when: insert_keys
 
+- name: Create Button configuration folder
+  file:
+    path: "{{source_dir}}/files/etc/rc.button/"
+    state: directory
+  when: reset_button_alt
+
+- name: Template reset button configuration
+  template:
+    src: "rc.button.j2"
+    dest: "{{source_dir}}/files/etc/rc.button/reset"
+  when: reset_button_alt
+
 - name: Create the UCI config folder
   file:
     path: "{{source_dir}}/files/etc/config/"

roles/build-config/templates/rc.button.j2

@@ -0,0 +1,30 @@
+#!/bin/sh
+
+. /lib/functions.sh
+
+OVERLAY="$( grep ' /overlay ' /proc/mounts )"
+
+case "$ACTION" in
+timeout)
+        . /etc/diag.sh
+        set_state failsafe
+;;
+released)
+        if [ "$SEEN" -lt 1 ]
+        then
+                echo "REBOOT" > /dev/console
+                sync
+                reboot
+        elif [ "$SEEN" -ge 5 -a -n "$OVERLAY" ]
+        then
+                echo "ROUTER RESET" > /dev/console
+                rm /overlay/upper/etc/config/wireless
+                /etc/init.d/rita stop
+                sed -i 's/rita_dashboard_password.*//g' /etc/rita.toml
+                sync
+                reboot
+        fi
+;;
+esac
+
+return 0