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