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#! /bin/sh
# Implement blacklisting for udev-loaded modules
# Includes module checking
# - Aaron Griffin, Tobias Powalowski & Thomas Bächler for Arch Linux
[ $# -ne 1 ] && exit 1
MODPROBE="/sbin/modprobe"
RESOLVEALIAS="${MODPROBE} --resolve-alias"
USEBLACKLIST="--use-blacklist"
SED="/bin/sed"
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="$(echo "${disablemodules}" | ${SED} 's|,| |g')"
fi
fi
# sanitize the module names
BLACKLIST="$(echo "${BLACKLIST}" | ${SED} 's|-|_|g')"
if [ -n "${BLACKLIST}" ] ; then
# Try to find all modules for the alias
mods="$($RESOLVEALIAS $1)"
# If no modules could be found, try if the alias name is a module name
# In that case, omit the --use-blacklist parameter to imitate normal modprobe behaviour
[ -z "${mods}" ] && $MODPROBE -qni $1 && mods="$1" && USEBLACKLIST=""
[ -z "${mods}" ] && exit
for mod in ${mods}; do
# Find the module and all its dependencies
deps="$($MODPROBE -i --show-depends ${mod})"
[ $? -ne 0 ] && continue
#sanitize the module names
deps="$(echo "$deps" | ${SED} \
-e "s#^insmod /lib.*/\(.*\)\.ko.*#\1#g" \
-e 's|-|_|g')"
# 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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