mirror of
https://github.com/archlinuxarm/PKGBUILDs.git
synced 2024-11-28 22:57:37 +00:00
81 lines
2.9 KiB
Bash
81 lines
2.9 KiB
Bash
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#!/bin/bash
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# Implement blacklisting for udev-loaded modules
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[ $# -ne 1 ] && exit 1
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. /etc/rc.conf
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# grab modules from rc.conf
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BLACKLIST="${MOD_BLACKLIST[@]}"
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MODPROBE="/sbin/modprobe"
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LOGGER="/usr/bin/logger"
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RESOLVEALIAS="${MODPROBE} --resolve-alias"
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USEBLACKLIST="--use-blacklist"
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if [ -f /proc/cmdline ]; then
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for cmd in $(cat /proc/cmdline); do
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case $cmd in
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disablemodules=*) eval $cmd ;;
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load_modules=off) exit ;;
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esac
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done
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#parse cmdline entries of the form "disablemodules=x,y,z"
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if [ -n "$disablemodules" ]; then
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BLACKLIST="$BLACKLIST $(echo $disablemodules | sed 's|,| |g')"
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fi
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fi
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#MODULES entries in rc.conf that begin with ! are blacklisted
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for mod in ${MODULES[@]}; do
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if [ "${mod}" != "${mod#!}" ]; then
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BLACKLIST="$BLACKLIST ${mod#!}"
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fi
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done
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if [ "$MOD_AUTOLOAD" = "yes" -o "$MOD_AUTOLOAD" = "YES" ]; then
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if [ -n "${BLACKLIST}" ]; then
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# If an alias name is on the blacklist, load no modules for this device
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if echo "${BLACKLIST}" | /bin/grep -q -e " $1 " -e "^$1 " -e " $1\$"; then
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$LOGGER -p info -t "$(basename $0)" "Not loading module alias '$1' because it is blacklisted"
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exit
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fi
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#sanitize the blacklist
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BLACKLIST="$(echo "$BLACKLIST" | sed -e 's|-|_|g')"
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# Try to find all modules for the alias
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mods=$($RESOLVEALIAS $1)
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# If no modules could be found, try if the alias name is a module name
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# In that case, omit the --use-blacklist parameter to imitate normal modprobe behaviour
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[ -z "${mods}" ] && $MODPROBE -qni $1 && mods="$1" && USEBLACKLIST=""
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[ -z "${mods}" ] && $LOGGER -p info -t "$(basename $0)" "'$1' is not a valid module or alias name"
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for mod in ${mods}; do
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# Find the module and all its dependencies
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deps="$($MODPROBE -i --show-depends ${mod})"
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[ $? -ne 0 ] && continue
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#sanitize the module names
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deps="$(echo "$deps" | sed \
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-e "s#^insmod /lib.*/\(.*\)\.ko.*#\1#g" \
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-e 's|-|_|g')"
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# If the module or any of its dependencies is blacklisted, don't load it
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for dep in $deps; do
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if echo "${BLACKLIST}" | /bin/grep -q -e " ${dep} " -e "^${dep} " -e " ${dep}\$"; then
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if [ "${dep}" = "${mod}" ]; then
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$LOGGER -p info -t "$(basename $0)" "Not loading module '${mod}' for alias '$1' because it is blacklisted"
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else
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$LOGGER -p info -t "$(basename $0)" "Not loading module '${mod}' for alias '$1' because its dependency '${dep}' is blacklisted"
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fi
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continue 2
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fi
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done
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# modprobe usually uses the "blacklist" statements from modprobe.conf only to blacklist all aliases
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# of a module, but not the module itself. We use --use-blacklist here so that modprobe also blacklists
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# module names if we resolved alias names manually above
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$MODPROBE $USEBLACKLIST ${mod}
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done
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else
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$MODPROBE $1
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fi
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fi
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# vim: set et ts=4:
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