#!/bin/bash # Purpose: Install Realtek out-of-kernel USB WiFi adapter drivers. # # Supports dkms and non-dkms installations. # Copyright(c) 2023 Nick Morrow # # This program is free software; you can redistribute it and/or modify # it under the terms of version 2 of the GNU General Public License as # published by the Free Software Foundation. # # This program is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. SCRIPT_NAME="install-driver.sh" SCRIPT_VERSION="20230114" MODULE_NAME="8821cu" DRV_VERSION="5.12.0.4" KVER="$(uname -r)" KARCH="$(uname -m)" MODDESTDIR="/lib/modules/${KVER}/kernel/drivers/net/wireless/" DRV_NAME="rtl${MODULE_NAME}" DRV_DIR="$(pwd)" OPTIONS_FILE="${MODULE_NAME}.conf" export SMEM=$(LANG=C free | awk '/Mem:/ { print $2 }') export SPROC=$(nproc) # check to ensure sudo was used if [[ $EUID -ne 0 ]] then echo "You must run this script with superuser (root) privileges." echo "Try: \"sudo ./${SCRIPT_NAME}\"" exit 1 fi # ensure /usr/sbin is in the PATH so iw can be found if ! echo "$PATH" | grep -qw sbin; then export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin fi # check to ensure gcc is installed if ! command -v gcc >/dev/null 2>&1 then echo "A required package is not installed." echo "Please install the following package: gcc" echo "Once the package is installed, please run \"sudo ./${SCRIPT_NAME}\"" exit 1 fi # check to ensure make is installed if ! command -v make >/dev/null 2>&1 then echo "A required package is not installed." echo "Please install the following package: make" echo "Once the package is installed, please run \"sudo ./${SCRIPT_NAME}\"" exit 1 fi # check to see if header files are installed if [ ! -d "/lib/modules/$(uname -r)/build" ]; then echo "Your kernel header files aren't properly installed." echo "Please consult your distro documentation." echo "Once the header files are installed, please run \"sudo ./${SCRIPT_NAME}\"" exit 1 fi # check to ensure iw is installed if ! command -v iw >/dev/null 2>&1 then echo "A required package is not installed." echo "Please install the following package: iw" echo "Once the package is installed, please run \"sudo ./${SCRIPT_NAME}\"" exit 1 fi # check to ensure rfkill is installed if ! command -v rfkill >/dev/null 2>&1 then echo "A required package is not installed." echo "Please install the following package: rfkill" echo "Once the package is installed, please run \"sudo ./${SCRIPT_NAME}\"" exit 1 fi # check to ensure nano is installed if ! command -v nano >/dev/null 2>&1 then echo "A required package is not installed." echo "Please install the following package: nano" echo "Once the package is installed, please run \"sudo ./${SCRIPT_NAME}\"" exit 1 fi # support for the NoPrompt option allows non-interactive use of this script NO_PROMPT=0 # get the script options while [ $# -gt 0 ] do case $1 in NoPrompt) NO_PROMPT=1 ;; *h|*help|*) echo "Syntax $0 " echo " NoPrompt - noninteractive mode" echo " -h|--help - Show help" exit 1 ;; esac shift done # displays script name and version echo ": ${SCRIPT_NAME} v${SCRIPT_VERSION}" # information that helps with bug reports # display architecture echo ": ${KARCH} (ARCH)" # display total system memory echo ": ${SMEM} (SMEM)" # Avoid Out of Memory condition in low-RAM systems by limiting core usage. if [ "$SPROC" -gt 1 ] then if [ "$SMEM" -lt 1400000 ] then SPROC=2 fi fi # display total number of cpu cores / in use echo ": ${SPROC}/$(nproc) (SPROC)" # display kernel version echo ": ${KVER} (KVER)" # display gcc version gcc_ver=$(gcc --version | grep -i gcc) echo ": "${gcc_ver} # display dkms version if installed if command -v dkms >/dev/null 2>&1 then dkms_ver=$(dkms --version) echo ": "${dkms_ver} fi # display secure mode status if mokutil is installed if command -v mokutil >/dev/null 2>&1 then sb_state=$(mokutil --sb-state) echo ": "${sb_state} fi # display ISO 3166-1 alpha-2 Country Code #a2_country_code=$(iw reg get | grep -i country) #echo "Country: "${a2_country_code} #if [[ $a2_country_code == *"00"* ]]; #then # echo "The Country Code may not be properly set." # echo "File alpha-2_Country_Codes is located in the driver directory." # echo "Please read and follow the directions in the file after installation." #fi # check for and remove non-dkms installations # standard naming if [[ -f "${MODDESTDIR}${MODULE_NAME}.ko" ]] then echo "Removing a non-dkms installation: ${MODDESTDIR}${MODULE_NAME}.ko" rm -f ${MODDESTDIR}${MODULE_NAME}.ko /sbin/depmod -a ${KVER} echo "Removing ${OPTIONS_FILE} from /etc/modprobe.d" rm -f /etc/modprobe.d/${OPTIONS_FILE} echo "Removing source files from /usr/src/${DRV_NAME}-${DRV_VERSION}" rm -rf /usr/src/${DRV_NAME}-${DRV_VERSION} make clean >/dev/null 2>&1 fi # check for and remove non-dkms installations # with rtl added to module name (PClinuxOS) if [[ -f "${MODDESTDIR}rtl${MODULE_NAME}.ko" ]] then echo "Removing a non-dkms installation: ${MODDESTDIR}rtl${MODULE_NAME}.ko" rm -f ${MODDESTDIR}rtl${MODULE_NAME}.ko /sbin/depmod -a ${KVER} echo "Removing ${OPTIONS_FILE} from /etc/modprobe.d" rm -f /etc/modprobe.d/${OPTIONS_FILE} echo "Removing source files from /usr/src/${DRV_NAME}-${DRV_VERSION}" rm -rf /usr/src/${DRV_NAME}-${DRV_VERSION} make clean >/dev/null 2>&1 fi # check for and remove non-dkms installations # with compressed module in a unique non-standard location (Armbian) # Example: /usr/lib/modules/5.15.80-rockchip64/kernel/drivers/net/wireless/rtl8821cu/8821cu.ko.xz # Dear Armbiam, this is a really bad idea. if [[ -f "/usr/lib/modules/${KVER}/kernel/drivers/net/wireless/${DRV_NAME}/${MODULE_NAME}.ko.xz" ]] then echo "Removing a non-dkms installation: /usr/lib/modules/${KVER}/kernel/drivers/net/wireless/${DRV_NAME}/${MODULE_NAME}.ko.xz" rm -f /usr/lib/modules/${KVER}/kernel/drivers/net/wireless/${DRV_NAME}/${MODULE_NAME}.ko.xz /sbin/depmod -a ${KVER} echo "Removing ${OPTIONS_FILE} from /etc/modprobe.d" rm -f /etc/modprobe.d/${OPTIONS_FILE} echo "Removing source files from /usr/src/${DRV_NAME}-${DRV_VERSION}" rm -rf /usr/src/${DRV_NAME}-${DRV_VERSION} make clean >/dev/null 2>&1 fi # check for and remove dkms installations if command -v dkms >/dev/null 2>&1 then if dkms status | grep -i ${DRV_NAME} then echo "Removing a dkms installation: ${DRV_NAME}" dkms remove -m ${DRV_NAME} -v ${DRV_VERSION} --all echo "Removing ${OPTIONS_FILE} from /etc/modprobe.d" rm -f /etc/modprobe.d/${OPTIONS_FILE} echo "Removing source files from /usr/src/${DRV_NAME}-${DRV_VERSION}" rm -rf /usr/src/${DRV_NAME}-${DRV_VERSION} fi fi # sets module parameters (driver options) and blacklisted modules echo "Installing ${OPTIONS_FILE} to /etc/modprobe.d" cp -f ${OPTIONS_FILE} /etc/modprobe.d # determine if dkms is installed and run the appropriate routines if ! command -v dkms >/dev/null 2>&1 then echo "The non-dkms installation routines are in use." make clean >/dev/null 2>&1 make -j$(nproc) RESULT=$? if [[ "$RESULT" != "0" ]] then echo "An error occurred: ${RESULT}" echo "Please report this error." echo "Please copy all screen output and paste it into the problem report." echo "You will need to run the following before reattempting installation." echo "$ sudo ./remove-driver.sh" exit $RESULT fi # As shown in Makefile # install: # install -p -m 644 $(MODULE_NAME).ko $(MODDESTDIR) # /sbin/depmod -a ${KVER} make install RESULT=$? if [[ "$RESULT" = "0" ]] then make clean >/dev/null 2>&1 echo "The driver was installed successfully." else echo "An error occurred: ${RESULT}" echo "Please report this error." echo "Please copy all screen output and paste it into the problem report." echo "You will need to run the following before reattempting installation." echo "$ sudo ./remove-driver.sh" exit $RESULT fi else echo "The dkms installation routines are in use." # the dkms add command requires source in /usr/src/${DRV_NAME}-${DRV_VERSION} echo "Copying source files to /usr/src/${DRV_NAME}-${DRV_VERSION}" cp -rf "${DRV_DIR}" /usr/src/${DRV_NAME}-${DRV_VERSION} dkms add -m ${DRV_NAME} -v ${DRV_VERSION} RESULT=$? # RESULT will be 3 if the DKMS tree already contains the same module/version # combo. You cannot add the same module/version combo more than once. if [[ "$RESULT" != "0" ]] then if [[ "$RESULT" = "3" ]] then echo "This driver may already be installed." echo "Run the following and then reattempt installation." echo "$ sudo ./remove-driver.sh" exit $RESULT else echo "An error occurred. dkms add error: ${RESULT}" echo "Please report this error." echo "Please copy all screen output and paste it into the problem report." echo "Run the following before reattempting installation." echo "$ sudo ./remove-driver.sh" exit $RESULT fi else echo "The driver was added to dkms successfully." fi if command -v /usr/bin/time >/dev/null 2>&1 then /usr/bin/time -f "Compile time: %U seconds" dkms build -m ${DRV_NAME} -v ${DRV_VERSION} else dkms build -m ${DRV_NAME} -v ${DRV_VERSION} fi RESULT=$? if [[ "$RESULT" != "0" ]] then echo "An error occurred. dkms build error: ${RESULT}" echo "Please report this error." echo "Please copy all screen output and paste it into the problem report." echo "Run the following before reattempting installation." echo "$ sudo ./remove-driver.sh" exit $RESULT else echo "The driver was built by dkms successfully." fi dkms install -m ${DRV_NAME} -v ${DRV_VERSION} RESULT=$? if [[ "$RESULT" != "0" ]] then echo "An error occurred. dkms install error: ${RESULT}" echo "Please report this error." echo "Please copy all screen output and paste it into the problem report." echo "Run the following before reattempting installation." echo "$ sudo ./remove-driver.sh" exit $RESULT else echo "The driver was installed by dkms successfully." fi fi # unblock wifi if command -v rfkill >/dev/null 2>&1 then rfkill unblock wlan else echo "Unable to run $ rfkill unblock wlan" fi # if NoPrompt is not used, ask user some questions if [ $NO_PROMPT -ne 1 ] then read -p "Do you want to edit the driver options file now? [y/N] " -n 1 -r echo if [[ $REPLY =~ ^[Yy]$ ]] then nano /etc/modprobe.d/${OPTIONS_FILE} fi read -p "Do you want to reboot now? (recommended) [y/N] " -n 1 -r echo if [[ $REPLY =~ ^[Yy]$ ]] then reboot fi fi exit 0