Nexmon firmware replacing on-demand

wifi.sh

#!/system/bin/sh

# place me in this folder:
export HOME="/sdcard/wifi"
# place patched firmware with this name
patched_path="$HOME/bcmdhd_sta.bin.patched"

backup_path="$HOME/bcmdhd_sta.bin.backup"
fw_path="/system/etc/wifi/bcmdhd_sta.bin"

[[ "$UID" -eq 0 ]] || {
	echo "This script must be run as root"
	exit 1
}

cd

wifi=$(settings get global wifi_on)

if [ $wifi -eq 1 ]; then
	svc wifi disable
	echo "Android WiFi turned off"
fi

mount -o rw,remount /system
cp "$fw_path" "$backup_path"
cp "$patched_path" "$fw_path"
chmod 644 "$fw_path"
mount -o ro,remount /system
echo "Firmware patch loaded"

ip link set wlan0 down
ip link set wlan0 up
echo "WiFi interface set to UP state"

nexutil -d
nexutil -m2
echo "Monitor mode enabled"

echo "Entering interactive shell"
export LD_PRELOAD="/data/local/tmp/libfakeioctl.so"
export HISTFILE="$HOME/.bash_history"
export USER="$(id -un)"
export HOSTNAME="$(getprop ro.cm.device)"
export PS1='\[\033[01;31m\]root\[\033[00m\]@\[\033[01;32m\]${HOSTNAME:=$(hostname)}\[\033[01;34m\] \[\033[01;37m\]\w \[\033[00m\]\$ '
export PATH="$PATH:/data/local/wifi-toolkit/"
export TERM=xterm
export TMPDIR="/data/local/tmp"
bash --norc -O checkwinsize -O histappend -i
unset HISTFILE
unset LD_PRELOAD

echo "Restoring firmware backup"
mount -o rw,remount /system
cp "$backup_path" "$fw_path"
chmod 644 "$fw_path"
mount -o ro,remount /system
rm "$backup_path"

echo "Setting WiFi interface to DOWN state"
ip link set wlan0 down

if [ $wifi -eq 1 ]; then
	echo "Turning Android WiFi on"
	svc wifi enable
fi