add swap and logic

README.md

@@ -83,11 +83,12 @@ to:
 ```
 ENABLE_USB_ETH="true"
 ```
-the next time you boot your camera, make sure your USB Ethernet Adapter is connected to the camera and ethernet.  The camera has to be setup initially with Wi-Fi for this to work.  After setup, Wi-Fi is no longer needed.
+the next time you boot your camera, make sure your USB Ethernet Adapter is connected to the camera and ethernet.  The camera has to be setup initially with Wi-Fi for this to work.  After setup, Wi-Fi is no longer needed, as long as you are using the USB Ethernet Adapter.  Note that using USB Ethernet disables the onboard Wi-Fi.
 
 
 ## Latest Updates
 
+* 04-14-22:  Possible memory leak with some USB adapters used, added 128MB swap file and logic as workaround to prevent oom killing
 * 04-13-22:  Firmware updates are disabled by default, there is a bug in the bootloader that corrupts the kernel partition requiring the re-flash of the camera if an update is processed and the memory card is removed before next boot.  The bootloader proceeds to copy the partitions and the system will not boot unless re-flashed.  pending investigation.
 * 04-12-22:  Updated, custom kernel loads all required items from micro sd card.  System modification no longer needed.
 * 04-05-22:  Update readme to indicate that telnet mod nor DNS spoofing is required for installation, and add pre-requisites section.

SD_ROOT/wz_mini/etc/init.d/v3_init.sh

@@ -21,6 +21,15 @@ cp /opt/wz_mini/etc/shadow /tmp/.shadow
 mount --bind /tmp/.shadow /etc/shadow
 chmod 400 /etc/shadow
 
+if [[ -f /opt/wz_mini/swap.gz ]]; then
+	echo "swap archive present, extracting"
+        gzip -d /opt/wz_mini/swap.gz
+        mkswap /opt/wz_mini/swap
+	sync;echo 3 > /proc/sys/vm/drop_caches;free
+else
+	echo "swap archive not present, not extracting"
+fi
+
 { sleep 30; /media/mmc/wz_mini/run_mmc.sh > /media/mmc/wz_mini/log/wz_mini_hacks.log; } &
 
 /linuxrc

SD_ROOT/wz_mini/run_mmc.sh

@@ -19,6 +19,14 @@ else
 fi
 
 if [[ "$ENABLE_USB_ETH" == "true" ]]; then
+
+        if [[ -f /media/mmc/wz_mini/swap ]]; then
+                echo "swap exists, enable"
+                swapon /media/mmc/wz_mini/swap
+        else
+		echo "swap missing, system stability with usb potentially comprimised"
+	fi
+
         ifconfig eth0 down
         ifconfig wlan0 down
 
@@ -27,8 +35,8 @@ if [[ "$ENABLE_USB_ETH" == "true" ]]; then
 
         ifconfig wlan0 up
 	pkill udhcpc
-	udhcpc -i wlan0 -H $HOSTNAME -p /var/run/udhcpc.pid -b
-        sleep 5
+        udhcpc -i wlan0 -x hostname:$HOSTNAME -p /var/run/udhcpc.pid -b
+#        sleep 5
         mount -o bind /media/mmc/wz_mini/bin/wpa_cli.sh /bin/wpa_cli
 	else
 	        echo "usb ethernet disabled"
@@ -46,8 +54,7 @@ if [[ "$ENABLE_USB_DIRECT" == "true" ]]; then
 
         ifconfig wlan0 up
 	pkill udhcpc
-	udhcpc -i wlan0 -H $HOSTNAME -p /var/run/udhcpc.pid -b
-
+        udhcpc -i wlan0 -x hostname:$HOSTNAME -p /var/run/udhcpc.pid -b
         sleep 5
         mount -o bind /media/mmc/wz_mini/bin/wpa_cli.sh /bin/wpa_cli
 	else