broadcom-firmware.arch.sh

#!/bin/bash
set -euo pipefail

main() {
	install_deps
	write_config
	reload_wlmod
	connect_wifi
	echo SUCCESS
}

detect_firmware() {
	if dmesg | grep -qi b43legacy; then echo b43legacy-firmwareAUR
	elif dmesg | grep -qi b43; then echo b43-firmwareAUR
	else echo broadcom-wl-dkms
	fi
}

install_yay() {
	git clone https://aur.archlinux.org/yay.git /tmp/yay
	cd /tmp/yay && makepkg -si --noconfirm
	alias pacman=yay
}

install_deps() {
	firmware_pkg=$(detect_firmware)
	pacman -Sy --noconfirm base-devel linux-headers wpa_supplicant dhcpcd git
	[[ $firmware_pkg != *AUR* ]] || install_yay
	pacman -S --noconfirm $firmware_pkg
}

write_config() {
	printf %s\\n blacklist\ {b43,b43legacy,bcma,brcmsmac,ssb} > /etc/modprobe.d/blackcom-wifi.conf
}

reload_wlmod() {
	modprobe -r wl || true
	if [[ $firmware_pkg == 43* ]]; then modprobe b43
	else modprobe wl
	fi
}

setup_dhcpd() {
	iface=$(iw dev | awk '$1=="Interface"{print $2}' | head -1)
	[[ -n "$iface" ]] && dhcpcd "$iface"
}

connect_wifi() {
	read -p "SSID: " ssid; read -sp "Password: " pass; echo
	wpa_supplicant -Bi"$iface" -c<(wpa_passphrase "$ssid" "$pass")
}

main