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#!/sbin/runscript
# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
description="Maintain a tarball of not udev managed device nodes"
[ -e /etc/conf.d/udev ] && . /etc/conf.d/udev
rc_device_tarball=${rc_device_tarball:-${RC_DEVICE_TARBALL:-NO}}
device_tarball=/lib/udev/state/devices.tar.bz2
depend() {
if [ -f /etc/init.d/sysfs ]; then
need udev-mount
fi
}
start()
{
_start
}
_start() {
if yesno "${rc_device_tarball}" && \
[ -s "${device_tarball}" ]
then
ebegin "Populating /dev with saved device nodes"
tar -jxpf "${device_tarball}" -C /dev
eend $?
fi
}
stop() {
if [ -e /dev/.devfsd ] || [ ! -e /dev/.udev ] || [ ! -z "${CDBOOT}" ] || \
! yesno "${rc_device_tarball}" || \
! touch "${device_tarball}" 2>/dev/null
then
return 0
fi
ebegin "Saving device nodes"
# Handle our temp files
save_tmp_base=/tmp/udev.savedevices."$$"
devices_udev="${save_tmp_base}"/devices.udev
devices_real="${save_tmp_base}"/devices.real
devices_totar="${save_tmp_base}"/devices.totar
device_tmp_tarball="${save_tmp_base}"/devices
rm -rf "${save_tmp_base}"
mkdir "${save_tmp_base}"
touch "${devices_udev}" "${devices_real}" \
"${devices_totar}" "${device_tmp_tarball}"
if [ -f "${devices_udev}" -a -f "${devices_real}" -a \
-f "${devices_totar}" -a -f "${device_tmp_tarball}" ]
then
cd /dev
# Find all devices, but ignore .udev directory
find . -xdev -type b -or -type c -or -type l | \
cut -d/ -f2- | \
grep -v ^\\.udev >"${devices_real}"
# Figure out what udev created
udevadm info --export-db | sed -ne 's,^[SN]: \(.*\),\1,p' >"${devices_udev}"
# These ones we also do not want in there
for x in MAKEDEV core fd initctl pts shm stderr stdin stdout root; do
echo "${x}" >> "${devices_udev}"
done
if [ -d /lib/udev/devices ]; then
cd /lib/udev/devices
find . -xdev -type b -or -type c -or -type l | \
cut -d/ -f2- >> "${devices_udev}"
cd /dev
fi
fgrep -x -v -f "${devices_udev}" "${devices_real}" > "${devices_totar}"
# Now only tarball those not created by udev if we have any
if [ -s "${devices_totar}" ]; then
# we dont want to descend into mounted filesystems (e.g. devpts)
# looking up username may involve NIS/network
# and net may be down
tar --one-file-system --numeric-owner \
-jcpf "${device_tmp_tarball}" -T "${devices_totar}"
mv -f "${device_tmp_tarball}" "${device_tarball}"
else
rm -f "${device_tarball}"
fi
eend 0
else
eend 1 "Could not create temporary files!"
fi
rm -rf "${save_tmp_base}"
}
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