path: root/scripts/functions

# -*- shell-script -*-

_log_msg()
{
    if [ "$quiet" = "y" ]; then return; fi
    echo "$@"
}

log_success_msg()
{
    _log_msg "Success: $@"
}

log_failure_msg()
{
    _log_msg "Failure: $@"
}

log_warning_msg()
{
    _log_msg "Warning: $@"
}

log_begin_msg()
{
    _log_msg "Begin: $@ ..."
}

log_end_msg()
{
    _log_msg "Done."
}

# update_progress() # ToDo: NOP placeholder... what else for usplash?
# {
#     :
# }

panic()
{
	echo $@
	FS1='(initramfs) ' exec /bin/sh </dev/console >/dev/console 2>&1
}

render()
{
	eval "echo -n \${$@}"
}

set_initlist()
{
	unset initlist
	for si_x in ${initdir}/*; do
		if [ ! -x ${si_x} ]; then
			continue
		fi
		initlist="${initlist} $(basename ${si_x})"
	done
}

reduce_satisfied()
{
	deplist="$(render array_${1})"
	for rs_x in ${runlist}; do
		pop_list_item ${rs_x} ${deplist}
		deplist=${tmppop}
	done
	eval array_${1}=\"${deplist}\"
}

get_prereqs()
{
	set_initlist
	for gp_x in ${initlist}; do
		tmp=$(${initdir}/${gp_x} prereqs)
		eval array_${gp_x}=\"${tmp}\"
	done
}

count_unsatisfied()
{
	set - ${@}
	return ${#}
}

# Removes $1 from initlist
pop_list_item()
{
	item=${1}
	shift
	set - ${@}
	unset tmppop
	# Iterate
	for pop in ${@}; do
		if [ ${pop} = ${item} ]; then
			continue
		fi
		tmppop="${tmppop} ${pop}"
	done

}

# This function generates the runlist, so we clear it first.
reduce_prereqs()
{
	unset runlist
	set_initlist
	set - ${initlist}
	i=$#
	# Loop until there's no more in the queue to loop through
	while [ ${i} -ne 0 ]; do
		oldi=${i}
		for rp_x in ${initlist}; do
			reduce_satisfied ${rp_x}
			count_unsatisfied $(render array_${rp_x})
			cnt=${?}
			if [ ${cnt} -eq 0 ]; then
				runlist="${runlist} ${rp_x}"
				pop_list_item ${rp_x} ${initlist}
				initlist=${tmppop}
				i=$((${i} - 1))
			fi
		done
		if [ ${i} -eq ${oldi} ]; then
			echo "PANIC: Circular dependancy.  Exiting." >&2
			exit 1
		fi
	done
}

call_scripts()
{
	for cs_x in ${runlist}; do
		${initdir}/${cs_x}
	done
}

run_scripts()
{
	initdir=${1}
	get_prereqs
	reduce_prereqs
	call_scripts
}

ide_boot_events() {
	[ -e /proc/ide ] || return

	modprobe -q ide-generic

	for drive in /proc/ide/*; do
		[ -e ${drive}/media ] || continue
		# nothing to do if the device has already been took in charge
		unit=${drive#/proc/ide/}
		[ -d /sys/block/$unit ] && continue

		read media < $drive/media
		case "$media" in
			disk)     MODULE=ide-disk ;;
			cdrom)    MODULE=ide-cd ;;
			tape)     MODULE=ide-tape ;;
			floppy)   MODULE=ide-floppy ;;
			*)        MODULE=ide-generic ;;
		esac

		modprobe -q ${MODULE}
	done
}

scsi_boot_events()
{
	[ -e /sys/bus/scsi/devices/ ] || return

	for device in /sys/bus/scsi/devices/*; do
		read media < ${device}/type
		case "$media" in
			0)	modprobe -q sd_mod;
		esac	

	done

}

i2o_boot_events()
{
	[ -e /sys/bus/i2o/devices/ ] || return

	for device in /sys/bus/i2o/devices/*; do
		[ -e ${device}/block ] && modprobe i2o_block
	done
}

load_modules()
{
	depmod -a

	# Load custom modules first
	if [ -e /conf/modules ]; then
		cat /conf/modules | while read m; do
			if [ -z "$m" ] \
			    || expr "$m" : "#" >/dev/null \
			    || expr "$m" : "[ \t]+#?" > /dev/null
			then
				continue;
			else
				modprobe -q $m
			fi
		done
	fi

	for x in /sys/bus/pci/devices/*; do
		if [ -e ${x}/modalias ]; then
			modprobe -q $(cat ${x}/modalias)
		fi
	done

	# Give the USB bus a moment to catch up
	sleep 2

	for x in /sys/bus/usb/devices/*; do
		if [ -e ${x}/modalias ]; then
			modprobe -q $(cat ${x}/modalias)
		fi
	done

	ide_boot_events

	scsi_boot_events

	i2o_boot_events
}

parse_numeric() {
	case $1 in
	/*)
		return
		;;
	*:*)
		minor=${1#*:}
		major=${1%:*}
		;;
	*)
		minor=$((0x${1#??}))
		major=$((0x${1%??}))
		;;
	esac

	mknod /dev/root b ${major} ${minor}
	ROOT=/dev/root
}