mirror of
https://github.com/morrownr/8821cu-20210916.git
synced 2024-11-18 19:44:48 +00:00
144 lines
4.0 KiB
Bash
Executable File
144 lines
4.0 KiB
Bash
Executable File
#!/bin/bash
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# Purpose: Remove Realtek out-of-kernel USB WiFi adapter drivers.
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#
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# Supports dkms and non-dkms removals.
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# Copyright(c) 2023 Nick Morrow
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of version 2 of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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SCRIPT_NAME="remove-driver.sh"
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SCRIPT_VERSION="20230109"
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MODULE_NAME="8821cu"
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DRV_VERSION="5.12.0.4"
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KVER="$(uname -r)"
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KARCH="$(uname -m)"
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#KSRC="/lib/modules/${KVER}/build"
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MODDESTDIR="/lib/modules/${KVER}/kernel/drivers/net/wireless/"
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DRV_NAME="rtl${MODULE_NAME}"
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DRV_DIR="$(pwd)"
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OPTIONS_FILE="${MODULE_NAME}.conf"
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# check to ensure sudo was used
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if [[ $EUID -ne 0 ]]
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then
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echo "You must run this script with superuser (root) privileges."
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echo "Try: \"sudo ./${SCRIPT_NAME}\""
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exit 1
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fi
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# support for the NoPrompt option allows non-interactive use of this script
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NO_PROMPT=0
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# get the script options
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while [ $# -gt 0 ]
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do
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case $1 in
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NoPrompt)
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NO_PROMPT=1 ;;
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*h|*help|*)
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echo "Syntax $0 <NoPrompt>"
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echo " NoPrompt - noninteractive mode"
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echo " -h|--help - Show help"
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exit 1
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;;
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esac
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shift
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done
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# displays script name and version
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echo ": ${SCRIPT_NAME} v${SCRIPT_VERSION}"
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# check for and remove non-dkms installations
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# standard naming
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if [[ -f "${MODDESTDIR}${MODULE_NAME}.ko" ]]
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then
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echo "Removing a non-dkms installation: ${MODDESTDIR}${MODULE_NAME}.ko"
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rm -f ${MODDESTDIR}${MODULE_NAME}.ko
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/sbin/depmod -a ${KVER}
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fi
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# check for and remove non-dkms installations
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# with rtl added to module name (PClinuxOS)
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if [[ -f "${MODDESTDIR}rtl${MODULE_NAME}.ko" ]]
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then
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echo "Removing a non-dkms installation: ${MODDESTDIR}rtl${MODULE_NAME}.ko"
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rm -f ${MODDESTDIR}rtl${MODULE_NAME}.ko
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/sbin/depmod -a ${KVER}
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fi
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# check for and remove non-dkms installations
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# with compressed module in a unique non-standard location (Armbian)
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# Example: /usr/lib/modules/5.15.80-rockchip64/kernel/drivers/net/wireless/rtl8821cu/8821cu.ko.xz
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# Dear Armbiam, this is a really bad idea.
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if [[ -f "/usr/lib/modules/${KVER}/kernel/drivers/net/wireless/${DRV_NAME}/${MODULE_NAME}.ko.xz" ]]
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then
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echo "Removing a non-dkms installation: /usr/lib/modules/${KVER}/kernel/drivers/net/wireless/${DRV_NAME}/${MODULE_NAME}.ko.xz"
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rm -f /usr/lib/modules/${KVER}/kernel/drivers/net/wireless/${DRV_NAME}/${MODULE_NAME}.ko.xz
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/sbin/depmod -a ${KVER}
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fi
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# information that helps with bug reports
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# display kernel version
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echo ": ${KVER}"
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# display architecture
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echo ": ${KARCH}"
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# determine if dkms is installed and run the appropriate routines
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if command -v dkms >/dev/null 2>&1
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then
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echo "Removing a dkms installation."
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# 2>/dev/null suppresses the output of dkms
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dkms remove -m ${DRV_NAME} -v ${DRV_VERSION} --all 2>/dev/null
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RESULT=$?
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#echo "Result=${RESULT}"
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# RESULT will be 3 if there are no instances of module to remove
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# however we still need to remove various files or the install script
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# may complain.
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if [[ ("$RESULT" = "0")||("$RESULT" = "3") ]]
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then
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if [[ ("$RESULT" = "0") ]]
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then
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echo "${DRV_NAME}/${DRV_VERSION} has been removed"
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fi
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else
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echo "An error occurred. dkms remove error: ${RESULT}"
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echo "Please report this error."
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exit $RESULT
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fi
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fi
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echo "Removing ${OPTIONS_FILE} from /etc/modprobe.d"
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rm -f /etc/modprobe.d/${OPTIONS_FILE}
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echo "Removing source files from /usr/src/${DRV_NAME}-${DRV_VERSION}"
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rm -rf /usr/src/${DRV_NAME}-${DRV_VERSION}
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make clean >/dev/null 2>&1
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echo "The driver was removed successfully."
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echo "You may now delete the driver directory if desired."
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# if NoPrompt is not used, ask user some questions
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if [ $NO_PROMPT -ne 1 ]
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then
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read -p "Do you want to reboot now? (recommended) [y/N] " -n 1 -r
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echo
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if [[ $REPLY =~ ^[Yy]$ ]]
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then
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reboot
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fi
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fi
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exit 0
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