udev: generate blacklist on boot

udev will read /etc/modprobe.d/*.conf and blacklist all modules that are listed as

blacklist <module>

We parse rc.conf at boot and generate such a .conf file. It cannot be written to
/etc this early, so we save it to /run. A symlink exists in /etc to get the desired
functionality.

With this patch (and an analogous one in mkinitcpio) load-modules.sh can be removed
from the udev package without loss of significant functionality.

Setting MOD_AUTOLOAD will then no longer take effect, nor will kernel parameters.
Thouhgh, kernel parameters might still affect the initramfs as the implementation
is independent.

Original-idea-by: Benjamen Richer <br@waldteufel-online.net>
Based-on-patch-by: David Reisner <d@falconindy.com>
Signed-off-by: Tom Gundersen <teg@jklm.no>

1 files changed, 3 insertions, 0 deletions

diff --git a/rc.sysinit b/rc.sysinit
index d0003ab..2250546 100755
--- a/rc.sysinit
+++ b/rc.sysinit
@@ -83,6 +83,9 @@ if [[ $HWCLOCK_PARAMS ]]; then
 	fi
 fi
 
+# parse rc.conf and create the blacklist file for use by modprobe
+status "Creating UDev blacklist" /sbin/modprobe-blacklist
+
 status "Starting UDev Daemon" /sbin/udevd --daemon
 
 run_hook sysinit_udevlaunched