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#! /bin/sh
# Implement blacklisting for udev-loaded modules
# Includes module checking
# - Aaron Griffin & Tobias Powalowski for Archlinux
[ $# -ne 1 ] && exit 1
MODPROBE="/sbin/modprobe"
RESOLVEALIAS="/bin/resolve-modalias"
USEBLACKLIST="--use-blacklist"
REPLACE="/bin/replace"
MODDEPS="/bin/moddeps"
if [ -f /proc/cmdline ]; then
for cmd in $(cat /proc/cmdline); do
case $cmd in
disablemodules=*) eval $cmd ;;
load_modules=off) exit ;;
esac
done
#parse cmdline entries of the form "disablemodules=x,y,z"
if [ -n "${disablemodules}" ]; then
BLACKLIST="$(${REPLACE} ${disablemodules} ',')"
fi
fi
# sanitize the module names
BLACKLIST="$(${REPLACE} "${BLACKLIST}" '-' '_')"
if [ -n "${BLACKLIST}" ] ; then
# Try to find all modules for the alias
mods="$($RESOLVEALIAS /lib/modules/$(uname -r)/modules.alias $1)"
# If no modules could be found, try if the alias name is a module name
# In that case, omit the --use-blacklist parameter to imitate normal modprobe behaviour
[ -z "${mods}" ] && $MODPROBE -qni $1 && mods="$1" && USEBLACKLIST=""
[ -z "${mods}" ] && exit
for mod in ${mods}; do
deps="$(${MODDEPS} ${mod})"
[ $? -ne 0 ] && continue
# If the module or any of its dependencies is blacklisted, don't load it
for dep in $deps; do
for blackmod in ${BLACKLIST}; do
[ "${blackmod}" = "${dep}" ] && continue 3
done
done
$MODPROBE $USEBLACKLIST ${mod}
done
else
$MODPROBE $1
fi
# vim: set et ts=4:
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