#!/bin/bash
# $Header: /home/cvsd/magellan-cvs/magellan-src/magellan-initscripts/etc/rc.d/init.d/rc,v 1.7 2006-01-03 18:07:43 niro Exp $

source /etc/sysconfig/rc
source $rc_functions

# get mage version
MAGEVER="$(< /etc/mageversion)"

# source kernel config if exists
[ -f /etc/conf.d/kernel ] && source /etc/conf.d/kernel

udev_version()
{
	local version=0

	if [[ -x /sbin/udev ]]
	then
		version=$(/sbin/udev -V)
		# We need it without a leading '0', else bash do the wrong thing
		version=${version##0}
		# Older udev's will print nothing
		[[ -z ${version} ]] && version=0
	fi

	echo "${version}"
}

# this works only for 2.6.15 kernels and greater
trigger_events()
{
	local list=""
	local i
	local first
	local last
	local default

	# if you want real hotplug (with all modules being loaded for all
	# devices in the system), uncomment out the next line.
	#list="$list $(echo /sys/bus/*/devices/*/uevent)"
	list="${list} $(echo /sys/class/*/*/uevent)"
	list="${list} $(echo /sys/block/*/uevent /sys/block/*/*/uevent)"
	for i in ${list}
	do
		case "${i}" in
			*/device/uevent)
				# skip followed device symlinks
				continue
				;;
			*/class/mem/*|*/class/tty/*)
				first="${first} ${i}"
				;;
			*/block/md*)
				last="${last} ${i}"
				;;
			*/*)
				default="${default} ${i}"
				;;
		esac
	done

	# trigger the sorted events
	for i in ${first} ${default} ${last}
	do
		echo "add" > "${i}"
	done
}

populate_udev()
{
	local loop

	# populate /dev with devices already found by the kernel
	if [ "$(kernel_version | sed 's:\.::g')" -gt "2614" ]
	then
		echo -e ${COLOREDSTAR}"  Populating /dev with existing devices through uevents ..."
		trigger_events
		evaluate_retval
	else
		echo -e ${COLOREDSTAR}"  Populating /dev with existing devices with udevstart ..."
		/sbin/udevstart
		evaluate_retval
	fi

	# loop until everything is finished
	# there's gotta be a better way...
	echo -e ${COLOREDSTAR}"  Letting udev process events ..."
	loop=0
	while test -d /dev/.udev/queue
	do
		sleep 0.1;
		test "${loop}" -gt 300 && break
		loop=$((${loop} + 1))
	done
	evaluate_retval

	return 0
}

seed_dev()
{
	# seed /dev with some things that we know we need
	echo -e ${COLOREDSTAR}"  Seeding /dev with needed nodes ..."
	(
		# copy over any persistant things
		cp --preserve=all --recursive --update /lib/udev/devices/* /dev
	
		# not provided by sysfs but needed
		ln -snf /proc/self/fd /dev/fd
		ln -snf fd/0 /dev/stdin
		ln -snf fd/1 /dev/stdout
		ln -snf fd/2 /dev/stderr
		[[ -e /proc/kcore ]] && ln -snf /proc/kcore /dev/core
	
		# create problematic directories
		mkdir -p /dev/{pts,shm}
	)
	evaluate_retval
}

# # some needed functions functions
# populate_udev() {
# 		/sbin/udevstart
# 
# 		# not provided by sysfs but needed
# 		ln -snf /proc/self/fd /dev/fd
# 		ln -snf fd/0 /dev/stdin
# 		ln -snf fd/1 /dev/stdout
# 		ln -snf fd/2 /dev/stderr
# 		ln -snf /proc/kcore /dev/core
# 		ln -snf /proc/asound/oss/sndstat /dev/sndstat
# 
# 		# create problematic directories
# 		mkdir -p /dev/{pts,shm}
# 
# 		# same as /dev/.devfsd
# 		touch /dev/.udev
# 
# 		return 0
# }

trap "" INT QUIT TSTP

[ "$1" != "" ] && runlevel=$1

if [[ $runlevel = sysinit ]]
then
	echo
	echo -e "${COLGREEN}Starting ${COLBLUE}MAGELLAN (v${MAGEVER}) ${COLGREEN}Linux${COLDEFAULT}"
	echo -e "Copyright 2001-2005 Niels Rogalla; http://magellan-linux.net"
	echo

	# mount proc filesystem, needed for bootsplash;
	# no use of '/etc/rc.d/init.d/mountproc' anymore
	if [ ! -e /proc/mounts ]
	then
		echo -e ${COLOREDSTAR}"Mounting proc file system ..."
		mount -n /proc
		evaluate_retval
	fi

	# set default verbose level for kernel messages
	[ -z "${RC_VERBOSE_LEVEL}" ] && RC_VERBOSE_LEVEL=3
	echo "${RC_VERBOSE_LEVEL}" > /proc/sys/kernel/printk

	# mount sys file system before udev or devfs (kernel-2.6)
	if [[ $(kernel_major_version) = 2.6 ]]
	then
		if [ -d /sys ]
		then
			echo -e ${COLOREDSTAR}"Mounting sysfs file system ..."
			mount -n -t sysfs sysfs /sys
			evaluate_retval
		else
			echo -e ${COLORED}"Fatal: mountpoint /sys missing ..."
			echo -e ${COLYELLOW}"Please create the directory /sys (mkdir -p /sys)."
			echo -e ${COLYELLOW}"It's essential for a 2.6 kernel."
		fi
	fi

	## load devfs ##
	# load devfs only with a 2.4 kernel or its really wanted with a 2.6
	if [[ $(kernel_major_version) = 2.4 ]] || [[ ${RC_USED_DEV} = devfs ]]
	then
		# start devfsd daemon, needed for bootsplash;
		# no use of '/etc/rc.d/init.d/devfs' anymore
		# check if devfs was mounted by the kernel,
		# if not mount it (mbuild_livecd needs this one)
		if [ ! -e /dev/.devfsd ]
		then
			echo -e ${COLOREDSTAR}"Mounting devfs file system ..."
			mount -n -t devfs devfs /dev
			evaluate_retval
		fi

		if [ -e /dev/.devfsd ]
		then
			echo -e ${COLOREDSTAR}"Starting devfsd ..."
			## directory /lib/dev-state !must! exists ##
			/sbin/devfsd /dev &> /dev/null
			evaluate_retval
		else
			echo -e ${COLRED}"No devfs filesystem found ..."
			echo -e ${COLYELLOW}"Your Kernel doesn't support the devfs filesystem."
			echo -e ${COLYELLOW}"Devfs is necessary to run Magellan-Linux."
			echo -e ${COLYELLOW}"Please make shure that this is enabled in your kernel."
			echo
			echo -e ${COLYELLOW}"Press any key to shutdown the system safely ..."
			read
			$rc_base/init.d/halt
		fi
	fi

	#### load udev ####
	# load udev only with a 2.6 kernel
	if [[ $(kernel_major_version) = 2.6 ]] && [[ ${RC_USED_DEV} = udev ]]
	then
		# create a ramdisk for populating udev
		echo -e ${COLOREDSTAR}"Mounting udev at /dev ..."
		# tmpfs was suggested by Greg Kroah-Hartman
		# many video drivers needed exec access
		mount -n -t ramfs udev /dev -o exec,nosuid,mode=0755
		evaluate_retval

		# if a device tarball exists load it and if it is activated
		echo -e ${COLOREDSTAR}"Configurating system to use udev ..."
		if [[ ${RC_DEVICE_TARBALL} = yes ]]
		then
			echo -e ${COLOREDSTAR}"  Populating /dev with saved device nodes ..."
			tar -jxpf /lib/udev-state/devices.tar.bz2 -C /dev
			evaluate_retval
		fi

		# other eeded device nodes with udev
		seed_dev

		if [ -e /proc/sys/kernel/hotplug ]
		then
			if [ "$(kernel_version | sed 's:\.::g')" -gt "2614" ]
			then
				echo -e ${COLOREDSTAR}"  Using netlink for hotplug events ..."
				echo "" > /proc/sys/kernel/hotplug
				evaluate_retval
			elif [[ $(udev_version) -ge "48" ]]
			then
				echo -e ${COLOREDSTAR}"  Setting /sbin/udevsend as hotplug agent ..."
				echo "/sbin/udevsend" > /proc/sys/kernel/hotplug
				evaluate_retval
			elif [[ -x /sbin/hotplug ]]
			then
				echo -e ${COLOREDSTAR}"  Using /sbin/hotplug as hotplug agent ..."
				print_status success
			else
				echo -e ${COLOREDSTAR}"  Setting /sbin/udev as hotplug agent ..."
				echo "/sbin/udev" > /proc/sys/kernel/hotplug
				evaluate_retval
			fi
		else
			echo -e ${COLOREDSTAR}${COLYELLOW}"  Kernel was not compiled with hotplug support !"
			print_status failure
		fi

		echo -e ${COLOREDSTAR}"  Starting udevd daemon ..."
		/sbin/udevd --daemon
		evaluate_retval

		populate_udev

		# create nodes that udev can't
		echo -e ${COLOREDSTAR}"  Finializing udev configuration ..."
		[[ -x /sbin/dmsetup ]] && /sbin/dmsetup mknodes &>/dev/null
		[[ -x /sbin/lvm ]] && /sbin/lvm vgscan -P --mknodes --ignorelockingfailure &>/dev/null
		[[ -x /sbin/evms_activate ]] && /sbin/evms_activate -q &>/dev/null
		print_status success

		# same thing as /dev/.devfsd
		touch /dev/.udev
	fi

	## load devpts ##
	# devfs/udev with 2.6 has no ptys, so devpts is also needed
	if [[ $(kernel_major_version) = 2.6 ]]
	then
		# check if we really have devpts support
		if kernel_supports_fs devpts
		then
			# /dev/pts maybe not exists.
			# We only create this directory only if devfs was mounted,
			# or it will fail as / is still mounted readonly
			# udev has this dir already, only a sanity check for devfs
			if [ ! -d "/dev/pts" -a -e "/dev/.devfsd" ] && is_fs_mounted devfs
			then
				mkdir -p /dev/pts &> /dev/null || \
					echo "Could not create /dev/pts !"
			fi

			# now mount devpts
			if [ -d /dev/pts ]
			then
				echo -e ${COLOREDSTAR}"Mounting devpts at /dev/pts ..."
				mount -n -t devpts -o gid=4,mode=0620 devpts /dev/pts
				evaluate_retval
			fi
		else
			# devpts is not supported, give a warning
			echo -e ${COLRED}"No devpts filesystem found ..."
			echo -e ${COLYELLOW}"Your Kernel doesn't support the devpts filesystem."
			echo -e ${COLYELLOW}"Devfs with a kernel-2.6.x needs devpts,"
			echo -e ${COLYELLOW}"or no pty's are available."
			echo -e ${COLYELLOW}"Please make shure that this is enabled in your kernel."
			echo
			echo -e ${COLYELLOW}"Press any key to continue ..."
			read
		fi
	fi

	### services state dir ###
	echo -e ${COLOREDSTAR}"Mounting tmpfs at ${svcdir} ..."
	mount -n -t tmpfs tmpfs "${svcdir}" -o rw,mode=0644,size="${svcsize}"k
	evaluate_retval

	# load bootsplash
	splash "rc_init" "${runlevel}"
fi


if [[ $runlevel = 0 ]] || [[ $runlevel = 6 ]]
then
	# load bootsplash
	splash "rc_init" "${runlevel}"

	# if requested save devices to a device tarball before halt
	# only for kernels >=2.6 *and* udev
	# make shure that udev is mounted but *not* devfs --> /dev/.devfsd
	if [[ ${RC_DEVICE_TARBALL} = yes ]] && \
		[ -e /dev/.udev -a ! -e /dev/.devfsd -a ! -e /.bootdev ]
	then
		echo -e ${COLOREDSTAR}"Saving /dev device nodes ..."
		( cd /dev; tar -jclpf "/tmp/devices-$$.tar.bz2" * &> /dev/null )
		mv -f "/tmp/devices-$$.tar.bz2" /lib/udev-state/devices.tar.bz2
		evaluate_retval
	fi
fi


if [ "$runlevel" = "" ]
then
	echo "Usage: $0 <runlevel>" >&2
	exit 1
fi


previous=$PREVLEVEL
[ "$previous" = "" ] && previous=N

if [ ! -d $rc_base/rc$runlevel.d ]
then
	echo "$rc_base/rc$runlevel.d does not exist"
	exit 1
fi

if [ "$previous" != "N" ]
then
	for i in $(ls -v $rc_base/rc$runlevel.d/K* 2> /dev/null)
	do

		check_script_status

		suffix=${i#$rc_base/rc$runlevel.d/K[0-9][0-9]}
		prev_start=$rc_base/rc$previous.d/S[0-9][0-9]$suffix
		sysinit_start=$rc_base/rcsysinit.d/S[0-9][0-9]$suffix

		if [ "$runlevel" != "0" ] && [ "$runlevel" != "6" ]
		then
			if [ ! -f $prev_start ] && [ ! -f $sysinit_start ]
			then
				$WARNING
				echo "$i can't be executed because it was"
				echo "not started in the previous runlevel ($previous)"
				$NORMAL
				continue
			fi
		fi

		$i stop
		error_value=$?

		if [ "$error_value" != "0" ]
		then
			print_error_msg
		fi
	done
fi

for i in $( ls -v $rc_base/rc$runlevel.d/S* 2> /dev/null)
do
	if [ "$previous" != "N" ]
	then
		suffix=${i#$rc_base/rc$runlevel.d/S[0-9][0-9]}
		stop=$rc_base/rc$runlevel.d/K[0-9][0-9]$suffix
		prev_start=$rc_base/rc$previous.d/S[0-9][0-9]$suffix

		[ -f $prev_start ] && [ ! -f $stop ] && continue
	fi

	check_script_status

	$i start
	error_value=$?

	if [ "$error_value" != "0" ]
	then
		print_error_msg
	fi
done