diff options
Diffstat (limited to 'testing/udev/load-modules.sh')
-rwxr-xr-x | testing/udev/load-modules.sh | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/testing/udev/load-modules.sh b/testing/udev/load-modules.sh new file mode 100755 index 000000000..1e2af913e --- /dev/null +++ b/testing/udev/load-modules.sh @@ -0,0 +1,80 @@ +#!/bin/bash +# Implement blacklisting for udev-loaded modules + +[ $# -ne 1 ] && exit 1 + +. /etc/rc.conf + +# grab modules from rc.conf +BLACKLIST="${MOD_BLACKLIST[@]}" +MODPROBE="/sbin/modprobe" +LOGGER="/usr/bin/logger" +RESOLVEALIAS="${MODPROBE} --resolve-alias" +USEBLACKLIST="--use-blacklist" + +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="$BLACKLIST $(echo $disablemodules | sed 's|,| |g')" + fi +fi + +#MODULES entries in rc.conf that begin with ! are blacklisted +for mod in ${MODULES[@]}; do + if [ "${mod}" != "${mod#!}" ]; then + BLACKLIST="$BLACKLIST ${mod#!}" + fi +done + +if [ "$MOD_AUTOLOAD" = "yes" -o "$MOD_AUTOLOAD" = "YES" ]; then + if [ -n "${BLACKLIST}" ]; then + # If an alias name is on the blacklist, load no modules for this device + if echo "${BLACKLIST}" | /bin/grep -q -e " $1 " -e "^$1 " -e " $1\$"; then + $LOGGER -p info -t "$(basename $0)" "Not loading module alias '$1' because it is blacklisted" + exit + fi + #sanitize the blacklist + BLACKLIST="$(echo "$BLACKLIST" | sed -e 's|-|_|g')" + # Try to find all modules for the alias + mods=$($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}" ] && $LOGGER -p local0.debug -t "$(basename $0)" "'$1' is not a valid module or alias name" + 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 $deps; do + if echo "${BLACKLIST}" | /bin/grep -q -e " ${dep} " -e "^${dep} " -e " ${dep}\$"; then + if [ "${dep}" = "${mod}" ]; then + $LOGGER -p local0.info -t "$(basename $0)" "Not loading module '${mod}' for alias '$1' because it is blacklisted" + else + $LOGGER -p local0.info -t "$(basename $0)" "Not loading module '${mod}' for alias '$1' because its dependency '${dep}' is blacklisted" + fi + continue 2 + fi + done + # modprobe usually uses the "blacklist" statements from modprobe.conf only to blacklist all aliases + # of a module, but not the module itself. We use --use-blacklist here so that modprobe also blacklists + # module names if we resolved alias names manually above + $MODPROBE $USEBLACKLIST ${mod} + done + else + $MODPROBE $USEBLACKLIST $1 + fi +fi +# vim: set et ts=4: |