1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
#! /bin/sh
set +e # ignore errors
# Triggering causes udev to reprocess all events, as if it were coldplugging
# the system. In some cases this can be unnecessary (or even cause
# problems!), and all you really want to do is settle - i.e. make sure that
# udev is up-to-date with events that have already been generated. On the
# other hand, if you install new modules, as d-i sometimes does, then you
# need to trigger to make sure that events that couldn't be processed due to
# missing modules are reprocessed.
#
# Thus, we have two modes: 'update-dev' triggers reprocessing of all events
# and waits for that to finish, while 'update-dev --settle' just waits for
# events that are already pending to be handled by userspace.
TRIGGER=:
if [ "$1" = --settle ]; then
TRIGGER=false
fi
# Make sure /dev is up to date after loading modules.
if [ -x /lib/userdevfs/update-dev ]; then
/lib/userdevfs/update-dev
elif type udevadm >/dev/null 2>&1; then
if $TRIGGER; then
udevadm trigger --subsystem-nomatch=sound --subsystem-nomatch=power_supply
fi
udevadm settle
else
logger -t update-dev "warning: unable to find udevadm; skipping"
fi
exit 0
|