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#!/sbin/runscript
# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
command_args="--daemon ${udev_opts}"
description="udev manages device permissions and symbolic links in /dev"
extra_started_commands="reload"
description_reload="Reload the udev rules and databases"
udev_monitor="${udev_monitor:-no}"
udevmonitor_log=/run/udevmonitor.log
udevmonitor_pid=/run/udevmonitor.pid
depend()
{
provide dev
need sysfs dev-mount
before checkfs fsck
# udev does not work inside vservers
keyword -vserver -lxc
}
start_pre()
{
# make sure devtmpfs is in the kernel
if ! grep -qs devtmpfs /proc/filesystems; then
eerror "CONFIG_DEVTMPFS=y is required in your kernel configuration"
eerror "for this version of udev to run successfully."
eerror "This requires immediate attention."
if ! mountinfo -q /dev; then
mount -n -t tmpfs dev /dev
busybox mdev -s
mkdir /dev/pts
fi
return 1
fi
# make sure /dev is a mounted devtmpfs
if ! mountinfo -q -f devtmpfs /dev; then
eerror "Udev requires /dev to be a mounted devtmpfs."
eerror "Please reconfigure your system."
return 1
fi
# load unix domain sockets if built as module, Bug #221253
# and not yet loaded, Bug #363549
if [ ! -e /proc/net/unix ]; then
if ! modprobe unix; then
eerror "Cannot load the unix domain socket module"
return 1
fi
fi
bins="/sbin/udevd /lib/systemd/systemd-udevd /usr/lib/systemd/systemd-udevd"
for f in ${bins}; do
if [ -x "$f" -a ! -L "$f" ]; then
command="$f"
fi
done
if [ -z "$command" ]; then
eerror "Unable to find udev executable."
return 1
fi
if [ -e /proc/sys/kernel/hotplug ]; then
echo "" >/proc/sys/kernel/hotplug
fi
if yesno "${udev_debug:-NO}"; then
command_args="${command_args} --debug 2> /run/udevdebug.log"
fi
return 0
}
start_udevmonitor()
{
yesno "${udev_monitor}" || return 0
einfo "udev: Running udevadm monitor ${udev_monitor_opts} to log all events"
start-stop-daemon --start --stdout "${udevmonitor_log}" \
--make-pidfile --pidfile "${udevmonitor_pid}" \
--background --exec /bin/udevadm -- monitor ${udev_monitor_opts}
}
# This is here because some software expects /dev/root to exist.
# For more information, see this bug:
# https://bugs.gentoo.org/show_bug.cgi?id=438380
dev_root_link()
{
local RULESDIR=/run/udev/rules.d
[ -d $RULESDIR ] || mkdir -p $RULESDIR
eval $(udevadm info --export --export-prefix=ROOT_ --device-id-of-file=/ ||
true)
[ "$ROOT_MAJOR" -a "$ROOT_MINOR" ] || return 0
# btrfs filesystems have bogus major/minor numbers
[ "$ROOT_MAJOR" != 0 ] || return 0
echo 'ACTION=="add|change", SUBSYSTEM=="block", ENV{MAJOR}=="'$ROOT_MAJOR'", ENV{MINOR}=="'$ROOT_MINOR'", SYMLINK+="root"' > $RULESDIR/61-dev-root-link.rules
}
populate_dev()
{
if yesno ${rc_dev_root_symlink:-yes}; then
ebegin "Generating a rule to create a /dev/root symlink"
dev_root_link
eend $?
fi
get_bootparam "nocoldplug" && rc_coldplug="no"
if ! yesno ${rc_coldplug:-${RC_COLDPLUG:-yes}}; then
einfo "Setting /dev permissions and symbolic links"
udevadm trigger --attr-match=dev --action=add
udevadm trigger --subsystem-match=net --action=add
ewarn "Skipping udev coldplug sequence"
return 0
fi
ebegin "Populating /dev with existing devices through uevents"
udevadm trigger --type=subsystems --action=add
udevadm trigger --type=devices --action=add
eend $?
ebegin "Waiting for uevents to be processed"
udevadm settle --timeout=${udev_settle_timeout:-60}
eend $?
return 0
}
stop_udevmonitor()
{
yesno "${udev_monitor}" || return 0
if yesno "${udev_monitor_keep_running:-no}"; then
ewarn "udev: udevmonitor is still running and writing into ${udevmonitor_log}"
else
einfo "udev: Stopping udevmonitor: Log is in ${udevmonitor_log}"
start-stop-daemon --stop --pidfile "${udevmonitor_pid}" --exec /bin/udevadm
fi
}
display_hotplugged_services()
{
local svcfile= svc= services=
for svcfile in "${RC_SVCDIR}"/hotplugged/*; do
svc="${svcfile##*/}"
[ -x "${svcfile}" ] || continue
services="${services} ${svc}"
done
[ -n "${services}" ] && einfo "Device initiated services:${HILITE}${services}${NORMAL}"
}
start_post()
{
start_udevmonitor
populate_dev
stop_udevmonitor
display_hotplugged_services
return 0
}
stop()
{
local rc=0
ebegin "Stopping ${name:-$RC_SVCNAME}"
udevadm control --exit
rc=$?
if [ $rc -ne 0 ]; then
eend $rc "Failed to stop $RC_SVCNAME using udevadm"
ebegin "Trying with start-stop-daemon"
start-stop-daemon --stop --exec /sbin/udevd
rc=$?
fi
eend $rc "Failed to stop $RC_SVCNAME"
}
reload()
{
ebegin "reloading udev rules and databases"
udevadm control --reload
eend $?
}
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