0.0.9-unified_diff.patch

--- /dev/null
+++ /usr/bin/zram_swap_resize.sh
@@ -0,0 +1,156 @@
+#/bin/bash
+#
+# (C) 2023, Roberto A. Foglietta <roberto.foglietta@gmail.com>
+#           Released under MIT license for SailFish OS 4.5.19
+#
+################################################################################
+
+if [ "$(whoami)" != "root" ]; then
+    echo "This script should be executed by root"
+    echo "Please, insert the password or CTRL-C"
+    devel-su /bin/bash -c "$0 $1"
+    exit $?
+fi
+
+if echo "${1:-help}" | grep -q "h"; then
+    echo -e "\nUSAGE: $(basename $0) [ size(MB) | offload ]\n"
+    exit 0
+fi
+
+### GLOBAL VARIABLES INITIALISATION ############################################
+
+mtavail=no
+swapuse=off
+pwsvenagain=0
+pwsvstate=enabled
+blockname=/dev/block/zram0
+filename=$(ls -1 /vendor/etc/fstab.pdx20?)
+
+### GLOBAL FUNTCIONS DEFINITIONS ###############################################
+
+power_saving_state() {
+    pwsvstate=$(mcetool | sed -ne \
+      "s,^Power saving mode: *\([endisabl]*\) .*,\\1,p")
+    echo "Power saving mode: $pwsvstate" 
+}
+
+power_saving_toggle() {
+    if [ "$1" = "disabled" ]; then
+        echo "Enabling power state..."
+        mcetool --set-power-saving-mode=enabled
+        power_saving_state
+    elif [ "$1" = "enabled" ]; then
+	echo "Disabling power state..."
+        mcetool --set-power-saving-mode=disabled
+        power_saving_state
+    else
+        echo "USAGE: power_saving_toggle enable|disable"
+        return 1
+    fi
+    return 0
+}
+
+mcetool_check() {
+    if ! which mcetool >/dev/null; then
+        echo -e "\nThis script whish to have mce-tools installed"
+	echo    "because swapoff will fail with power saving enabled."
+	echo    "You can disable power saving manually or you can"
+        echo    "accept to reboot the device to complete the resize"
+        echo    "or you can install with pkcon install -y mce-tools"
+        echo -e "\nPress ENTER to continue or CTRL-C to abort."
+        read
+     fi
+     mtavail=yes
+}
+
+zram_swap_change() {
+    echo -e "\nDisabling and resizing the zRAM swap..." |\
+        awk '{print} END {fflush()}'
+    echo 1 > /proc/sys/vm/drop_caches
+    if [ "$swapuse" != "off" ]; then
+        if ! swapoff -v $blockname; then
+            echo -e "\nWARNING: the on-line resize failed, reboot required"
+            return 1
+        fi
+    fi
+    swapusage
+    zramctl -s $1 $blockname
+    mkswap $blockname
+    return 0
+}
+
+zram_swap_offload() {
+    if [ "$swapuse" = "off" ]; then
+        echo -e "\nWARNING: the swap is not active, nothing to do\n"
+        return 1
+    fi
+    echo "Offloading the zRAM swap..."
+    sleep 0.25; echo 1 > /proc/sys/vm/drop_caches
+    if ! swapoff -v $blockname; then
+        echo -e "\nWARNING: swapoff failed, aborting\n"
+        return 1
+    fi
+    swapusage
+    if ! swapon -v /dev/zram0; then
+        echo -e "\nWARNING: swapon failed, aborting\n"
+        return 1
+    fi
+    swapusage
+}
+
+swapusage() {
+    free -m | grep -i swap | tr -s ' ' | sed "s,0 0 0,off,"
+}
+
+zram_swap_resize() {
+    mb=$((${1:-1024} + 0))
+    zramsize=$((mb*1024*1024))
+    
+    zram_swap_change $zramsize || resized=no
+	
+    echo -e "\nThe zram size at the next boot is set in $filename by this line"
+    sed -i "s|\(^"$blockname".*size\)=[0-9]*,max|\\1="$((mb*1024*1024))",max|" \
+        $filename
+    grep zram $filename | tr -s ' '
+
+    if [ "$resized" != "no" ]; then
+        echo -e "\nEnabling the zRAM swap..."
+        swapusage
+        if ! swapon -v /dev/zram0; then
+            echo -e "\nWARNING: swapon failed, aborting\n"
+            return 1
+        fi
+        swapusage
+    fi
+    echo
+}
+
+sysmon_update() {
+    return 0 # disabled because it does not work as expected
+    kill $(pgrep harbour-systemmonitor) 2>/dev/null # wake-up/update
+}
+
+### MAIN SCRIPT SECTION ########################################################
+
+swapuse=$(swapusage | awk '{ print $2 }')
+printf "\nCurrent $(basename $blockname) swap size: %s Mb" $swapuse   
+printf "\nCurrent swapiness index: %d%%\n\n" $(cat /proc/sys/vm/swappiness)               
+
+mcetool_check
+power_saving_state
+if [ "$pwsvstate" = "enabled" ]; then
+   power_saving_toggle enabled
+   pwsvenagain=1
+fi
+
+if [ "$1" = "offload" ]; then
+    zram_swap_offload
+else
+    zram_swap_resize $1
+fi
+sysmon_update
+
+if [ "$pwsvenagain" = "1" ]; then
+   power_saving_toggle disabled
+fi
+echo