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install-driver.sh
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install-driver.sh
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#!/bin/bash
# Purpose: Install Realtek out-of-kernel USB WiFi adapter drivers.
#
# Supports dkms and non-dkms installations.
SCRIPT_NAME="install-driver.sh"
SCRIPT_VERSION="20221031"
MODULE_NAME="8821cu"
DRV_VERSION="5.12.0"
OPTIONS_FILE="${MODULE_NAME}.conf"
KVER="$(uname -r)"
KARCH="$(uname -m)"
KSRC="/lib/modules/${KVER}/build"
MODDESTDIR="/lib/modules/${KVER}/kernel/drivers/net/wireless/"
DRV_NAME="rtl${MODULE_NAME}"
DRV_DIR="$(pwd)"
# Some distros have a non-mainlined, patched-in kernel driver
# that has to be deactivated.
BLACKLIST_FILE="rtw88_8821cu.conf"
# 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
# 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 <NoPrompt>"
echo " NoPrompt - noninteractive mode"
echo " -h|--help - Show help"
exit 1
;;
esac
shift
done
# displays script name and version
echo "Running ${SCRIPT_NAME} version ${SCRIPT_VERSION}"
# check for and remove non-dkms installation
if [[ -f "${MODDESTDIR}${MODULE_NAME}.ko" ]]
then
echo "Removing a non-dkms installation."
rm -f ${MODDESTDIR}${MODULE_NAME}.ko
/sbin/depmod -a ${KVER}
fi
# information that helps with bug reports
# kernel
echo "Kernel=${KVER}"
# architecture - for ARM: aarch64 = 64 bit, armv7l = 32 bit
echo "Architecture=${KARCH}"
#getconf LONG_BIT (may be handy in the future)
# blacklist the in-kernel module (driver) so that there is no conflict
echo "Installing ${BLACKLIST_FILE} to: /etc/modprobe.d"
cp -f ${BLACKLIST_FILE} /etc/modprobe.d
# sets module parameters (driver options)
echo "Installing ${OPTIONS_FILE} to: /etc/modprobe.d"
cp -f ${OPTIONS_FILE} /etc/modprobe.d
# determine if dkms is installed and run the appropriate routines
if ! command -v dkms >/dev/null 2>&1
then
echo "The non-dkms installation routines are in use."
make clean
make
RESULT=$?
if [[ "$RESULT" != "0" ]]
then
echo "An error occurred. Error = ${RESULT}"
echo "Please report this error."
echo "Please copy all screen output and paste it into the report."
echo "You will need to run the following before reattempting installation."
echo "$ sudo ./remove-driver-no-dkms.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
echo "The driver was installed successfully."
else
echo "An error occurred. Error = ${RESULT}"
echo "Please report this error."
echo "Please copy all screen output and paste it into the report."
echo "You will need to run the following before reattempting installation."
echo "$ sudo ./remove-driver-no-dkms.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 "Run the following and then reattempt installation."
echo "$ sudo ./remove-driver.sh"
exit $RESULT
else
echo "An error occurred. dkms add error = ${RESULT}"
echo "Please report this error."
echo "Please copy all screen output and paste it into the report."
echo "Run the following before reattempting installation."
echo "$ sudo ./remove-driver.sh"
exit $RESULT
fi
fi
dkms build -m ${DRV_NAME} -v ${DRV_VERSION}
RESULT=$?
if [[ "$RESULT" != "0" ]]
then
echo "An error occurred. dkms build error = ${RESULT}"
echo "Please report this error."
echo "Please copy all screen output and paste it into the report."
echo "Run the following before reattempting installation."
echo "$ sudo ./remove-driver.sh"
exit $RESULT
fi
dkms install -m ${DRV_NAME} -v ${DRV_VERSION}
RESULT=$?
if [[ "$RESULT" = "0" ]]
then
echo "The driver was installed successfully."
else
echo "An error occurred. dkms install error = ${RESULT}"
echo "Please report this error."
echo "Please copy all screen output and paste it into the report."
echo "Run the following before reattempting installation."
echo "$ sudo ./remove-driver.sh"
exit $RESULT
fi
fi
# unblock wifi
rfkill unblock wlan
# if NoPrompt is not used, ask user some questions to complete installation
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