spark-rc/rc.in

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#!/bin/bash
# Default virtual mounts for linux systems
cfg_mounts+=( 'proc:proc:/proc:' )
cfg_mounts+=( 'run:tmpfs:/run:' )
cfg_mounts+=( 'sys:sysfs:/sys:' )
# devfs and its children
cfg_mounts+=( 'dev:devtmpfs:/dev:' )
cfg_mounts+=( 'pts:devpts:/dev/pts:noexec,nosuid,gid=5,mode=0620' )
cfg_mounts+=( 'mqueue:mqueue:/dev/mqueue:noexec,nosuid,nodev' )
cfg_mounts+=( 'shm:tmpfs:/dev/shm:defaults,mode=0777' )
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# Some temporary directories
cfg_tmpdirs+=( '/run/lock' '/run/lock/lvm' '/run/lvm' '/run/user' )
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# Functions
rc.rescue() { exec "${cfg_rc_rescue_shell:-"$SHELL"}"; }
rc.motd() {
[[ -f "/etc/rc.motd" ]] && {
while read; do
printf "$REPLY"
done < "/etc/rc.motd"
}
return 0
}
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rc.tmpdirs() {
mkdir -p -m0755 "${cfg_tmpdirs[@]}"
}
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rc.mount_misc() {
for m in "${cfg_mounts[@]}"; do
echo "$m" | while IFS=':' read fs fs_type mountpoint mount_options; do
[[ "$mount_options" ]] || { mount_options='defaults'; }
mountpoint -q "$mountpoint" || {
[[ -d "$mountpoint" ]] || { mkdir -p "$mountpoint"; }
mount "$fs" -n -t "$fs_type" -o "$mount_options" "$mountpoint"
}
done
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done
}
rc.parse_cmdline() {
[[ -f "/proc/cmdline" ]] && {
boot_cmdline=( $(</proc/cmdline) )
}
for i in "${boot_cmdline[@]}"; do
case "$i" in
init.single) rc.rescue;;
esac
done
}
rc.services_start() {
local service_name start_mode
for i in "${cfg_services[@]}"; do
unset service_name
[[ "$i" =~ ^@ ]] && {
service_name="${i##*@}"
start_mode='bg'
}
[[ "$i" =~ ^% ]] && {
service_name="${i##*%}"
start_mode='watch'
}
service_name=${service_name:-$i}
start_mode="${start_mode:-start}"
case "$start_mode" in
bg) service "$service_name" start &;;
start) service "$service_name" start;;
*) echo "Mode $start_mode not supported";;
esac
done
}
rc.services_stop() {
echo "Stopping services..."
local service_name
for i in "${cfg_services[@]}"; do
service_name="${i##*@}"; service_name="${service_name##*%}"
service "$service_name" stop &>/dev/null &
done
wait
}
rc.stop_everything() {
echo "Politely asking all processes to shut down..."
killall5 -15; sleep 3
echo "Killing the remaning ones..."
killall5 -9
}
rc.unmount_everything() {
echo "Unmounting filesystems..."
umount -a
}
rc.remount_root() {
echo "Remounting / read-only..."
mount / -o remount,ro
}
rc.boot() {
rc.mount_misc
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rc.tmpdirs
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rc.hostname
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rc.timezone
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rc.modules
rc.services_start
wait
rc.motd
}
rc.halt() {
case "$action" in
poweroff|shutdown) echo 'o' > /proc/sysrq-trigger;;
halt) :;;
reboot|*) echo 'b' > /proc/sysrq-trigger;;
esac
}
rc.shutdown() {
rc.services_stop
rc.stop_everything
rc.unmount_everything
rc.remount_root
echo "Halt complete."
rc.halt
}
rc.hostname() {
[[ -f '/etc/hostname' ]] && { hostname "$(</etc/hostname)"; }
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[[ "$cfg_hostname" ]] && { hostname "$cfg_hostname"; }
}
rc.modules() {
for i in "${cfg_modules[@]}"; do
modprobe "$i"
done
}
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rc.timezone() {
[[ "$cfg_timezone" ]] && {
ln -fs "/usr/share/zoneinfo/${cfg_timezone}" /etc/localtime
}
}
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rc.main() {
source "@ETC@/rc.conf"
action="${1:-boot}"
case "$action" in
boot)
echo "Welcome to `uname -rs`"
rc.boot
;;
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poweroff|reboot|shutdown|halt)
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rc.shutdown
;;
esac
}
# Main part
rc.main "$@"