Add udev hook, originated from the obsolete klibc-udev package

1 files changed, 51 insertions, 0 deletions

diff --git a/load-modules.sh b/load-modules.sh
new file mode 100755
index 0000000..21767ca
--- /dev/null
+++ b/load-modules.sh
@@ -0,0 +1,51 @@
+#! /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: