[projects/rc-scripts.git] / lib / functions

#!/bin/sh - keep it for file(1) to get bourne shell script result
# functions	This file contains functions to be used by most or all
#		shell scripts in the /etc/rc.d/init.d directory.
#
# $Id$
#
# Author:	Miquel van Smoorenburg, <miquels@drinkel.nl.mugnet.org>
# Hacked by:	Greg Galloway and Marc Ewing
# Modified for PLD Linux by:
#		Marek Obuchowicz <elephant@pld-linux.org>
#		Arkadiusz Miśkiewicz <misiek@pld-linux.org>
#		Michał Kochanowicz <mkochano@pld-linux.org>
#		Łukasz Pawelczyk <havner@pld-linux.org>

# First set up a default search path.
export PATH="/sbin:/usr/sbin:/bin:/usr/bin"

# Set defaults
if [ -z "$COLUMNS" -o -z "$LINES" ]; then
	_setterm() {
		set -- $(stty size 2>/dev/null)
		LINES=${LINES:-$1}
		COLUMNS=${COLUMNS:-$2}
	}
	_setterm
	unset _setterm
fi
[ -z "$LINES" ] || [ "$LINES" -le 0 ] && LINES=40
[ -z "$COLUMNS" ] || [ "$COLUMNS" -le 0 ] && COLUMNS=80
export LINES COLUMNS
INIT_COL=$((COLUMNS - 13))

# Set colors
RED=1
GREEN=2
YELLOW=3
BLUE=4
MAGENTA=5
CYAN=6
WHITE=7
NORMAL=15
# Bold definition (second parameter to termput setaf)
BOLD=1
NOBOLD=0
# Default colors
CBRACKETS="$CYAN"	# brackets [ ] color
CDONE="$GREEN"		# DONE and WORK color
CBUSY="$MAGENTA"	# BUSY color
CFAIL="$RED"		# FAIL and DIED color
CPOWEREDBY="$CYAN"	# "Powered by" color
CPLD="$GREEN"		# "PLD Linux Distribution" color
CI="$RED"		# Capital I color (press I to enter interactive startup)
CRESMAN="$GREEN"	# "Resource Manager" color
CHARS=""		# Characters displayed on the beginning of show line
CCHARS="$NORMAL"	# Color of these characters (look at /etc/sysconfig/init-colors.gentoo example)

# save from env, set by /sbin/service
env_upstart=$USE_UPSTART

# Source configuration if available - may override default values
[ -r /etc/sysconfig/init-colors ] && . /etc/sysconfig/init-colors
[ -r /etc/sysconfig/system ] && . /etc/sysconfig/system
[ -r /etc/sysconfig/bootsplash ] && . /etc/sysconfig/bootsplash

# if initscript is invoked via bash, enable RedHat/Fedora compatibility
# RC_FEDORA is "set" if enabled and "unset" when not, but it's "value" is always empty
# this is useful for inline constructs
if [ "${BASH_VERSION+set}" = "set" ]; then
	RC_LOGGING=yes
	FASTRC=no
	RC_FEDORA=
else
	unset RC_FEDORA || :
fi

[ "$env_upstart" ] && USE_UPSTART=$env_upstart

if [ -z "$VSERVER" -o "$VSERVER" = "detect" ]; then
	{
		while read _f _ctx; do
			[ "$_f" = "VxID:" -o "$_f" = "s_context:" ] && break
		done </proc/self/status
	} 2>/dev/null
	if [ -z "$_ctx" -o "$_ctx" = "0" ]; then
		VSERVER=no
	else
		VSERVER=yes
	fi
	unset _f _ctx
fi

# VSERVER_ISOLATION_NET = isolation only inside of vserver guests
if [ -z "$VSERVER_ISOLATION_NET" -o "$VSERVER_ISOLATION_NET" = "detect" ]; then
	VSERVER_ISOLATION_NET=no
	if [ "$VSERVER" = "yes" ]; then
		if [ -f /proc/self/nsproxy ]; then
			{
				while read _t _data; do
					[ "$_t" = "net:" ] && break
				done < /proc/self/nsproxy
			} 2> /dev/null
		else
			# assume old kernel mode
			VSERVER_ISOLATION_NET=yes
		fi
		if [ "${_data##*\(}" = "I)" ]; then
			VSERVER_ISOLATION_NET=yes
		fi
		unset _f _data
	fi
fi

# we need to know in functions if we were called from a terminal
if [ -z "$ISATTY" ]; then
	[ -t ] && ISATTY=yes || ISATTY=no
	export ISATTY
fi

is_yes() {
	# Test syntax
	if [ $# = 0 ]; then
		msg_usage " is_yes {value}"
		return 2
	fi

	# Check value
	case "$1" in
	yes|Yes|YES|true|True|TRUE|on|On|ON|Y|y|1)
		# true returns zero
		return 0
		;;
	*)
		# false returns one
		return 1
		;;
	esac
}

is_no() {
	# Test syntax
	if [ $# = 0 ]; then
		msg_usage " is_no {value}"
		return 2
	fi

	case "$1" in
	no|No|NO|false|False|FALSE|off|Off|OFF|N|n|0)
		# true returns zero
		return 0
		;;
	*)
		# false returns one
		return 1
		;;
	esac
}

# checks if file is empty
# empty lines and lines beginning with hash are ignored
is_empty_file() {
	[ -s "$1" ] || return 0
	grep -vqE "^(#|[[:blank:]]*$)" "$1" && return 1 || return 0
}

# returns OK if $1 contains $2
strstr() {
	local a=$2
	[ "${1#*$a*}" = "$1" ] && return 1
	return 0
}

if is_yes "$FASTRC" || is_yes "$IN_SHUTDOWN"; then
	RC_LOGGING=no
fi

if is_no "$RC_LOGGING"; then
	initlog() {
		RESULT=0
		while [ "$1" != "${1##-}" ]; do
			case $1 in
			-c)
				shift
				$1
				RESULT=$?
				break
				;;
			*)
				shift
				;;
			esac
		done
		return $RESULT
	}
fi

kernelver() {
	local _x _y _z v v1 old_IFS ver
	{
		read _x _y v _z
		old_IFS=$IFS
		# strip _* or -* from versions like: "2.6.25_vanilla-1", "2.6.25-1"
		IFS='_-'
		set -- $v
		v1=${1}
		IFS='.'
		set -- $v1
		IFS=$old_IFS

		ver=${3}
		while [ ${#ver} -lt 3 ]; do ver="0$ver"; done
		ver="$2$ver"
		while [ ${#ver} -lt 6 ]; do ver="0$ver"; done
		ver="$1$ver"
		while [ ${#ver} -lt 9 ]; do ver="0$ver"; done
		echo $ver
	} < /proc/version
}

kernelverser() {
	local _x _y _z v v1 old_IFS ver
	{
		read _x _y v _z
		old_IFS=$IFS
		# strip _* or -* from versions like: "2.6.25_vanilla-1", "2.6.25-1"
		IFS='_-'
		set -- $v
		v1=${1}
		IFS='.'
		set -- $v1
		IFS=$old_IFS
		ver=$2
		while [ ${#ver} -lt 3 ]; do ver="0$ver"; done
		ver="$1$ver"
		while [ ${#ver} -lt 6 ]; do ver="0$ver"; done
		echo $ver
	} </proc/version
}

kernelvermser() {
	local _x _y _z v v1 old_IFS ver
	{
		read _x _y v _z
		old_IFS=$IFS
		# strip _* or -* from versions like: "2.6.25_vanilla-1", "2.6.25-1"
		IFS='_-'
		set -- $v
		v1=${1}
		IFS='.'
		set -- $v1
		IFS=$old_IFS
		ver="$1"
		while [ ${#ver} -lt 3 ]; do ver="0$ver"; done
		echo $ver
	} </proc/version
}

# Colors workaround
termput() {
	is_yes "$ISATTY" || return

	if is_yes "$FASTRC" || is_no "$TPUT"; then
		case "$1" in
		hpa)
			echo -ne "\033[$(($2+1))G"
			;;
		cuu*)
			echo -ne "\033[${2}A"
			;;
		el)
			echo -ne "\033[0K"
			;;
		setaf)
			local ISBOLD
			if [ -n "$3" ]; then
				ISBOLD="$3"
			else
				ISBOLD="$NOBOLD";
			fi
			is_yes "$COLOR_INIT" && echo -ne "\033[${ISBOLD};3${2}m"
			;;
		op)
			termput setaf $NORMAL
			;;
		esac
	else
		case "$1" in
		hpa | cuu* | el)
			tput "$@"
			;;
		setaf)
			if [ "$3" = "1" ]; then tput bold; else tput sgr0; fi
			is_yes "$COLOR_INIT" && tput setaf "$2"
			;;
		op)
			termput setaf $NORMAL
			;;
		esac
	fi
}

if [ ! -x /bin/printf ]; then
	# printf equivalent
	# FIXME: buggy when single or double quotes in message!
	printf() {
		local text m
		text="$1"
		shift
		if [ $# -gt 0 ]; then
			m="$1"
			shift
			while [ $# -gt 0 ]; do
				m="$m\",\"$1"
				shift
			done
		fi
		awk "BEGIN {printf \"$text\", \"$m\"; }"
	}
fi

# National language support function
nls() {
	local msg_echo nls_domain text message
	msg_echo='\n'
	nls_domain="$NLS_DOMAIN"
	while [ "$1" != "${1##-}" ]; do
		case "$1" in
		--nls-domain)
			shift
			nls_domain="$1"
			shift
			;;
		-n)
			msg_echo=''
			shift
			;;
		esac
	done
	message="$1"
	shift

	# empty message, so we return --misiek
	if [ -z "$message" ]; then
		echo -en "$msg_echo"
		return
	fi

	if is_yes "$GETTEXT"; then
		message=$(TEXTDOMAINDIR="/etc/sysconfig/locale" gettext -e --domain="${nls_domain:-rc-scripts}" "$message")
	fi

	printf "$message" "$@"
	echo -en "$msg_echo"
}

rc_splash() {
	local action="$1"

	if ! is_no "$BOOT_SPLASH" && ! is_yes "$VSERVER"; then
		[ -x /bin/splash ] && /bin/splash "$action"
	fi

	: $((progress++))
}

msg_network_down() {
	nls "ERROR: Networking is down. %s can't be run." "$1" >&2
}

msg_starting() {
	show "Starting %s service" "$1"
}

msg_already_running() {
	nls "%s service is already running." "$1"
}

msg_stopping() {
	show "Stopping %s service" "$1"
}

msg_not_running() {
	nls "%s service is not running." "$1"
}

msg_reloading() {
	show "Reloading %s service" "$1"
}

msg_usage() {
	nls "Usage: %s" "$*"
}

# Some functions to handle PLD Linux-style messages
show() {
	local text len

	if is_no "$FASTRC" && is_yes "$GETTEXT"; then
		text=$(nls -n "$@")
	else
		text=$(printf "$@")
	fi
	len=${#text}
	while [ $((len++)) -lt $INIT_COL ]; do
		text="$text."
	done
	if [ -n "$CHARS" ]; then
		termput setaf $CCHARS
		echo -n "$CHARS"
		termput op
	fi
	echo -n "$text"
}

deltext() {
	termput hpa $INIT_COL
}

# Displays message in square brackests ("[ DONE ]"). Takes two arguments.
# First is the text to display, second is color number to use (argument to
# tput setaf). If second argument is not given, default (2, green) will be
# used).
progress() {
	local COLOR
	if [ -n "$2" ]; then
		COLOR="$2"
	else
		COLOR="$CDONE"
	fi
	deltext
	echo -n "$(termput setaf $CBRACKETS)[$(termput setaf $COLOR) $(nls --nls-domain rc-scripts "$1") $(termput setaf $CBRACKETS)]$(termput op)"
}

busy() {
	echo -n "$_busy"
}

ok() {
	echo -ne "$_ok${RC_FEDORA+\r}${RC_FEDORA-\n}"
}

started() {
	echo "$_started"
}

fail() {
	echo -ne "$_fail${RC_FEDORA+\r}${RC_FEDORA-\n}"
	return 1
}

died() {
	echo "$_died"
	return 1
}

# Check if $pid (could be plural) are running
checkpid() {
	while [ "$1" ]; do
		[ -d "/proc/$1" ] && return 0
		shift
	done
	return 1
}

# - outside chroot get only those processes, which are outside chroot.
# - inside chroot get only those processes, which are inside chroot.
# - don't filter out pids which do not have corresponding running processes (process died etc)
# (note: some processes like named are chrooted but run outside chroot)
# - do nothing inside vserver
filter_chroot() {
	if is_yes "$VSERVER"; then
		echo $@
		return
	fi
	if [ $# -lt 1 -o ! -d /proc/1 ]; then
		echo $@
		return
	fi
	local root_dir good_pids="" good_add_pid
	for root_pid in $@; do
		root_dir=$(resolvesymlink /proc/${root_pid}/root)
		if [ -n "$root_dir" ]; then
			good_add_pid=1
			if [ -n "${SYSTEM_CHROOTS}" ]; then
				for r_dir in ${SYSTEM_CHROOTS}; do
					echo "$root_dir" | grep -q "^${r_dir}" && good_add_pid=0
				done
			fi
			[ "$good_add_pid" -eq 1 ] && good_pids="$good_pids $root_pid"
		elif [ ! -d "/proc/$root_pid" ]; then
			good_pids="$good_pids $root_pid"
		fi
	done
	echo $good_pids
}

# Usage:
# run_cmd Message command_to_run
# run_cmd -a Message command_to_run
# run_cmd --user "username" "Message" command_to_run
run_cmd() {
	local force_err=0 exit_code=0 errors user
	while [ $# -gt 0 ]; do
		case "$1" in
		-a)
			force_err=1
			;;
		--user)
			shift
			user=$1
			;;
		*)
			break
		esac
		shift
	done

	local message=$1; shift
	show "$message"; busy

	if errors=$(
		cd /
		export HOME=/tmp TMPDIR=/tmp
		if is_no "$RC_LOGGING"; then
			${user:+setuidgid -s $user} "$@" 2>&1
		else
			${user:+setuidgid -s $user} initlog -c "$*" 2>&1
		fi
		); then
		ok
		log_success "$1 $message"
	else
		fail
		log_failed "$1 $message"
		exit_code=1
	fi
	[ -n "$errors" ] && [ $exit_code -eq 1 -o $force_err -eq 1 ] && echo "$errors"
	return $exit_code
}

_daemon_set_ulimits() {
	local opt val ksh=${KSH_VERSION:+1}
	set -- ${SERVICE_LIMITS:-$DEFAULT_SERVICE_LIMITS}
	while [ $# -gt 0 ]; do
		opt=$1
		val=$2
		if [ "$ksh" ]; then
			case "$opt" in
			-Hu)
				opt=-Hp
			;;
			-Su)
				opt=-Sp
			;;
			-u)
				opt=-p
			;;
			esac
		fi
		ulimit $opt $val
		shift 2
	done
}

# A function to start a program (now it's useful on read-only filesystem too)
daemon() {
	local errors="" prog="" end="" waitname="" waittime=""
	local exit_code=0
	local nice=$SERVICE_RUN_NICE_LEVEL
	local fork user closefds redirfds pidfile makepid chdir=/

	# NOTE: if you wonder how the shellish (by syntax) $prog works in ssd mode,
	# then the answer is: it totally ignores $prog and uses "$@" itself.

	while [ $# -gt 0 ]; do
		case $1 in
		'')
		msg_usage " daemon [--check] [--user user] [--fork] [--chdir directory] [--closefds] [--redirfds] [--waitforname procname] [--waitfortime seconds] [--pidfile file] [--makepid] [+/-nicelevel] {program} <program args>"
			return 2
			;;
		--check)
			# for compatibility with redhat/mandrake
			nls "warning: --check option is ignored!"
			shift
			;;
		--user)
			shift
			user=$1
			;;
		--fork)
			fork=1
			end='&'
			;;
		--chdir)
			shift
			chdir=$1
			;;
		--closefds)
			closefds=1
			;;
		--redirfds)
			redirfds=1
			;;
		--waitforname)
			shift
			waitname="$1"
			;;
		--waitfortime)
			shift
			waittime="$1"
			;;
		--pidfile=?*)
			pidfile="${1#--pidfile=}"
			case "$pidfile" in /*);; *) pidfile="/var/run/$pidfile";; esac
			;;
		--pidfile)
			shift
			pidfile="$1"
			case "$pidfile" in /*);; *) pidfile="/var/run/$pidfile";; esac
			;;
		--makepid)
			makepid=1
			;;
		-*|+*)
			nice=$1
			shift
			break
			;;
		*)
			break
			;;
		esac
		shift
	done
	if [ -n "$user" -a "$user" != "root" ]; then
		prog="/bin/su $user -s /bin/sh -c \""
	fi
	if [ "$fork" = "1" ]; then
		prog="/usr/bin/setsid ${prog:-sh -c \"}"
	fi
	# If command to execute ends with quotation mark, add remaining
	# arguments and close quotation.
	if [ "$prog" != "${prog%\"}" ]; then
		prog="$prog $*$end\""
	else
		prog="$prog $*$end"
	fi

	_daemon_set_ulimits

	[ -z "$DEFAULT_SERVICE_UMASK" ] && DEFAULT_SERVICE_UMASK=022
	[ -z "$DEFAULT_SERVICE_RUN_NICE_LEVEL" ] && DEFAULT_SERVICE_RUN_NICE_LEVEL=0

	# And start it up.
	busy
	cd $chdir
	[ -n "$SERVICE_CPUSET" ] && is_yes "$CPUSETS" && echo $$ > "/dev/cpuset/${SERVICE_CPUSET}/tasks"
	if errors=$(
		umask ${SERVICE_UMASK:-$DEFAULT_SERVICE_UMASK};
		export USER=root HOME=/tmp TMPDIR=/tmp

		nice=${nice:-$DEFAULT_SERVICE_RUN_NICE_LEVEL}
		nice=${nice:-0}

		# make nice level absolute, not to be dependant of nice level of shell where service started
		nice=$(($nice - $(nice)))

		if [ "$closefds" = 1 ]; then
			exec 1>&-
			exec 2>&-
			exec 0>&-
		elif [ "$redirfds" = 1 ]; then
			exec 1>/dev/null
			exec 2>/dev/null
			exec 0>/dev/null
		else
			exec 2>&1
		fi

		if is_no "$RC_LOGGING"; then
			prog=$1; shift
			if [ ! -x $prog ]; then
				logger -t rc-scripts -p daemon.debug "daemon: Searching PATH for $prog, consider using full path in initscript"
				local a o=$IFS
				IFS=:
				for a in $PATH; do
					if [ -x $a/$prog ]; then
						prog=$a/$prog
						break
					fi
				done
				IFS=$o
			fi
			/sbin/start-stop-daemon -q --start \
				--nicelevel $nice \
				${pidfile:+--pidfile $pidfile} \
				${makepid:+--make-pidfile} \
				${user:+--chuid $user} \
				${chdir:+--chdir "$chdir"} \
				${fork:+--background} \
				${waitname:+--name $waitname} \
				${SERVICE_DROPCAPS:+--dropcap $SERVICE_DROPCAPS} \
				--exec "$prog" \
				-- ${1:+"$@"}
		else
			nice -n $nice initlog -c "$prog" 2>&1 </dev/null
		fi
		); then

		if [ -n "$waitname" -a -n "$waittime" ]; then
			# Save basename.
			base=${waitname##*/}
			# Find pid.
			pid=$(pidofproc "$waitname" "$pidfile")
			[ -z "$pid" ] && pid=$(pidofproc "$base" "$pidfile")
			i=0
			while [ "$i" -lt "$waittime" ]; do
				i=$((i + 1))
				checkpid $pid && sleep 1 || break
			done
		fi
		log_success "$1 startup"
		ok
	else
		exit_code=1
		fail
		log_failed "$1 startup"
		[ -n "$errors" ] && echo >&2 "$errors"
	fi
	return $exit_code
}

# A function to stop a program.
killproc() {
	local notset killlevel base pid pidfile result delay=3 try
	# Test syntax.
	if [ $# = 0 ]; then
		msg_usage " killproc [--pidfile|-p PIDFILE] [-d DELAY] {program} [-SIGNAME]"
		return 2
	fi

	while [ "$1" != "${1##-}" ]; do
		case $1 in
		-d)
			delay="$2"
			shift 2
			;;
		--pidfile|-p)
			pidfile="$2"
			case "$pidfile" in /*);; *) pidfile="/var/run/$pidfile";; esac
			shift 2
			;;
		--waitforname)
			waitname="$2"
			shift 2
			;;
		--waitfortime)
			waittime="$2"
			shift 2
			;;
		esac
	done

	busy

	local notset=0
	# check for second arg to be kill level
	if [ -n "$2" ]; then
		killlevel=$2
	else
		notset=1
	fi

	# experimental start-stop-daemon based killing.
	# works only with pidfile
	if is_no "$RC_LOGGING" && [ "$pidfile" ]; then
		local sig=${killlevel:--TERM} retry
		# retry only if signal is not specified,
		# as otherwise impossible to send HUP if process pid stays in pidfile.
		if [ "${killlevel+set}" = "set" ]; then
			# if we send HUP it's ok if process does not die
			retry="--oknodo"
		else
			retry="--retry ${sig#-}/10/${sig#-}/60/KILL/10"
		fi
		/sbin/start-stop-daemon -q --stop \
			$retry \
			-s ${sig#-} \
			${pidfile:+--pidfile $pidfile}
		result=$?
		if [ "$result" -eq 0 ]; then
			ok
		else
			fail
		fi
		return $result
	fi


	# Save basename.
	base=${1##*/}

	# Find pid.
	pid=$(pidofproc "$1" "$pidfile")
	[ -z "$pid" ] && pid=$(pidofproc "$base" "$pidfile")

	# Kill it.
	if [ -n "$pid" -a "$pid" != "$$" ] && checkpid $pid 2>&1; then
		if [ "$notset" = "1" ]; then
			if checkpid $pid 2>&1; then
				# TERM first, then KILL if not dead
				kill -TERM $pid
				usleep 50000

				try=0
				while [ $try -lt $delay ]; do
					checkpid $pid || break
					sleep 1
					try=$((try+1))
				done
				if checkpid $pid; then
					# XXX: SIGKILL is sent already on 4th second!
					# HARMFUL for example to mysqld (which is already workarounded)
					kill -KILL $pid
					usleep 50000
				fi
			fi
			checkpid $pid
			result=$?
			if [ "$result" -eq 0 ]; then
				fail
				log_failed "$1 shutdown"
			else
				ok
				log_success "$1 shutdown"
			fi
			result=$(( ! $result ))
		else
			# use specified level only
			if checkpid $pid > /dev/null 2>&1; then
				kill $killlevel $pid
				result=$?
				if [ "$result" -eq 0 ]; then
					ok
					log_success "$1 got $killlevel"
				else
					result=7
					fail
					log_failed "$1 didn't get $killlevel"
				fi
			else
				result=7
				died
				log_failed "$1 shutdown"
			fi
		fi
	else
		died
		log_failed "$1 shutdown"
		result=7
	fi

	if [ -n "$waitname" -a -n "$waittime" ]; then
		# Save basename.
		base=${waitname##*/}
		# Find pid.
		pid=$(pidofproc "$waitname" "$pidfile")
		[ -z "$pid" ] && pid=$(pidofproc "$base" "$pidfile")
		i=0
		while [ "$i" -lt "$waittime" ]; do
			i=$(( i + 1 ))
			checkpid $pid && sleep 1 || break
		done
	fi

	# Remove pid file if any.
	if [ "$notset" = "1" ]; then
		rm -f /var/run/${base}.pid
	fi

	return $result
}

# A function to find the pid of a program.
pidofproc() {
	local pid pidfile base=${1##*/}
	pidfile="$base.pid"
	[ -n "$2" ] && pidfile="$2"

	# Test syntax.
	if [ $# = 0 ]; then
		msg_usage " pidofproc {program}"
		return 2
	fi

	# First try pidfile or "/var/run/*.pid"
	case "$pidfile" in
		/*)pidfile="${pidfile}";;
		*) pidfile="/var/run/$pidfile";;
	esac
	if [ -f "${pidfile}" ]; then
		local p pid=""
		for p in $(< "${pidfile}"); do
			[ -z "$(echo "$p" | awk '{gsub(/[0-9]/,"");print;}')" ] && pid="$pid $p"
		done
	fi

	# Next try "pidof"
	[ -z "$pid" ] && pidof -o $$ -o $PPID -o %PPID -x "$1"
	pid=$(filter_chroot "$pid")
	echo $pid
}

# status [--pidfile PIDFILE] {subsys} [{daemon}]"
status() {
	local pid subsys daemon cpuset_msg pidfile
	if [ "$1" = "--pidfile" -o "$1" = "-p" ]; then
		pidfile=$2
		case "$pidfile" in /*);; *) pidfile="/var/run/$pidfile";; esac
		shift 2
	fi

	subsys=$1
	daemon=${2:-$subsys}

	# Test syntax.
	if [ $# = 0 ]; then
		msg_usage " status [--pidfile PIDFILE] {subsys} [{daemon}]"
		return 2
	fi

	# if pidfile specified, pid must be there
	if [ "$pidfile" ]; then
		[ -f "$pidfile" ] && read pid < $pidfile
		# filter_chroot does not filter out dead pids, so this extra check, see t/status-pidfile.sh
		if [ ! -d "/proc/$pid" ]; then
			pid=
		fi
	else
		pid=$(pidof -o $$ -o $PPID -o %PPID -x $daemon)
	fi
	pid=$(filter_chroot "$pid")

	if [ "$pid" ]; then
		cpuset_msg="..."
		if [ -n "$SERVICE_CPUSET" ] && is_yes "$CPUSETS"; then
			if grep -q "$pid" "/dev/cpuset/${SERVICE_CPUSET}/tasks"; then
				cpuset_msg=$(nls " in cpuset %s..." "$SERVICE_CPUSET")
			else
				cpuset_msg=$(nls " outside of configured cpuset %s..." "$SERVICE_CPUSET")
			fi
		fi
		nls "%s (pid %s) is running%s" "$daemon" "$pid" "$cpuset_msg"
		return 0
	fi

	# Next try "/var/run/*.pid" files; if pidfile is not set
	local base=${daemon##*/}
	if [ -z "$pidfile" -a -f /var/run/${base}.pid ]; then
		read pid < /var/run/${base}.pid
		pid=$(filter_chroot "$pid")
		if [ "$pid" ]; then
			nls "%s dead but pid file (%s) exists" "$subsys" /var/run/${base}.pid
			return 1
		fi
	fi

	# See if /var/lock/subsys/$subsys exists
	if [ -f /var/lock/subsys/$subsys ]; then
		nls "daemon %s dead but subsys (%s) locked" "$daemon" "$subsys"
		return 2
	fi
	nls "%s is stopped" "$subsys"
	return 3
}

# Confirm whether we really want to run this service
confirm() {
	local answer
	nls -n "Start service %s (Y)es/(N)o/(C)ontinue? [Y] " "$1"
	read answer
	case $answer in
	y|Y|t|T|j|J|"")
		return 0
		;;
	c|C|k|K|w|W)
		return 2
		;;
	n|N)
		return 1
		;;
	*)
		confirm $1
		return $?
		;;
	esac
}

# module is needed (ie. is requested, is available and isn't loaded already)
is_module() {
	# module name without .o at end
	if ! lsmod | grep -q "$1"; then
		if ls -1R /lib/modules/$(uname -r)/ 2> /dev/null | grep -q "^${1}.\(\|k\)o\(\|.gz\)"; then
			# true
			return 0
		fi
	fi
	# false
	return 1
}

_modprobe() {
	local parsed single die args foo result
	parsed=no
	while is_no "$parsed"; do
		case "$1" in
		"single")
			single=yes
			shift
			;;
		"die")
			die=yes
			shift
			;;
		-*)
			args="$args $1"
			shift
			;;
		*)
			parsed=yes
			;;
		esac
	done
	if is_yes "${single}"; then
		foo="$@"
		show "Loading %s kernel module(s)" "$foo"
		busy
	fi
	if [ -x /sbin/modprobe ]; then
		/sbin/modprobe -s $args "$@"
		result=$?
	else
		deltext; fail
		result=1
	fi
	if is_yes "${single}"; then
		deltext
		if [ $result = "0" ]; then
			is_yes "$single" && ok
		else
			fail
			if is_yes "$die"; then
				nls "Could not load %s kernel module(s)" "$@"
				exit 1
			fi
		fi
	fi
}

if is_no "$RC_LOGGING"; then
	log_success() {
		:
	}

	log_failed() {
		:
	}
else
	log_success() {
		initlog -n $0 -s "$1 $2" -e 1
	}

	log_failed() {
		initlog -n $0 -s "$1 $2" -e 2
	}
fi

# Check if any flavor of portmapper is running
check_portmapper() {
	if [ -x /usr/sbin/rpcinfo ]; then
		if /usr/sbin/rpcinfo -p localhost >/dev/null 2>/dev/null; then
			return 0
		else
			return 1
		fi
	elif [ -z "$(pidof portmap)" -a -z "$(pidof rpcbind)" ]; then
		return 1
	fi
	return 0
}

# is_fsmounted fstype mntpoint
# Check if filesystem fstype is mounted on mntpoint
is_fsmounted() {
	local fstype=$1
	local mntpoint=$2

	[ -n "$fstype" -a -n "$mntpoint" ] || return 1

	if [ -r /proc/mounts ]; then
		grep -qE "[[:blank:]]$mntpoint[[:blank:]]+$fstype[[:blank:]]" /proc/mounts
		return $?
	else
		if [ "$(stat -L -f -c %T $mntpoint 2>/dev/null)" = "$fstype" ]; then
			return 0
		else
			return 1
		fi
	fi
}

# __umount_loop awk_program fstab_file first_msg retry_msg umount_args
# awk_program should process fstab_file and return a list of fstab-encoded
# paths; it doesn't have to handle comments in fstab_file.
__umount_loop() {
	local remaining sig=
	local retry=3 count

	remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
	while [ -n "$remaining" -a "$retry" -gt 0 ]; do
		if [ "$retry" -eq 3 ]; then
			run_cmd "$3" fstab-decode umount $5 $remaining
		else
			run_cmd "$4" fstab-decode umount $5 $remaining
		fi
		count=4
		remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
		while [ "$count" -gt 0 ]; do
			[ -z "$remaining" ] && break
			count=$(($count-1))
			usleep 500000
			remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
		done
		[ -z "$remaining" ] && break
		fstab-decode /bin/fuser -k -m $sig $remaining >/dev/null
		sleep 3
		retry=$(($retry -1))
		sig=-9
	done
}

# Similar to __umount loop above, specialized for loopback devices
__umount_loopback_loop() {
	local remaining devremaining sig=
	local retry=3

	remaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $2}' /proc/mounts)
	devremaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $1}' /proc/mounts)
	while [ -n "$remaining" -a "$retry" -gt 0 ]; do
		if [ "$retry" -eq 3 ]; then
			run_cmd "Unmounting loopback filesystems: " \
				fstab-decode umount $remaining
		else
			run_cmd "Unmounting loopback filesystems (retry):" \
				fstab-decode umount $remaining
		fi
		for dev in $devremaining ; do
			losetup $dev > /dev/null 2>&1 && \
				run_cmd "Detaching loopback device $dev: " \
				losetup -d $dev
		done
		remaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $2}' /proc/mounts)
		devremaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $1}' /proc/mounts)
		[ -z "$remaining" ] && break
		fstab-decode /bin/fuser -k -m $sig $remaining >/dev/null
		sleep 3
		retry=$(($retry -1))
		sig=-9
	done
}

rc_cache_init() {
	# If we have cachefile, use it.
	# If we don't, create memory variables and try to save silently,
	local cachefile='/var/cache/rc-scripts/msg.cache'

	local term
	if is_yes "$ISATTY"; then
		term=$TERM
	else
		term=dumb
	fi

	# We create $check variable which is used to invalidate the cache.
	# The $check contains user locale and terminal.
	local check="$term.$LC_MESSAGES.$INIT_COL"

	if [ -f "$cachefile" -a "$cachefile" -nt /etc/sysconfig/system -a "$cachefile" -nt /etc/sysconfig/init-colors ]; then
		if . "$cachefile" 2>/dev/null; then
			if [ "$check" = "$_check" ]; then
				return
			fi
		fi
	fi

	# primitive caching
	_busy=$(progress "BUSY" "$CBUSY")
	_ok=$(progress "DONE")
	_started=$(progress "WORK")
	_fail=$(progress "FAIL" "$CFAIL")
	_died=$(progress "DIED" "$CFAIL")

	# we don't use heredoc, as ksh attempts to create tempfile then
	(> "$cachefile" ) 2>/dev/null || return
	echo "_busy='$_busy';" >> "$cachefile"
	echo "_ok='$_ok';" >> "$cachefile"
	echo "_started='$_started';" >> "$cachefile"
	echo "_fail='$_fail';" >> "$cachefile"
	echo "_died='$_died';" >> "$cachefile"
	echo "_check='$check';" >> "$cachefile"
}

rc_gettext_init() {
	if [ -z "$GETTEXT" ]; then
		if [ -x /bin/gettext -o -x /usr/bin/gettext ]; then
			GETTEXT=yes
		else
			GETTEXT=no
		fi
	fi

	if [ -z "$TPUT" ]; then
		if [ -d /usr/share/terminfo ] && [ -x /usr/bin/tput -o -x /bin/tput ]; then
			TPUT=yes
			# check if we are on proper terminal
			tput longname >/dev/null 2>&1 || TPUT=no
		else
			TPUT=no
		fi
	fi
}

use_upstart () {
	# True when upstart-event-based boot should be used
	is_yes "$USE_UPSTART" && return 0
	is_no "$USE_UPSTART" && return 1
	if [ ! -x /sbin/initctl ] ; then
		USE_UPSTART="no"
		return 1
	fi
	local cmdline=$(cat /proc/cmdline 2>/dev/null)
	if strstr "$cmdline" "pld.no-upstart" ; then
		USE_UPSTART="no"
		return 1
	else
		USE_UPSTART="yes"
		return 0
	fi
}

emit () {
	# emit upstart signal
	# only when 'upstart' boot is enabled
	use_upstart || return 0
	/sbin/initctl emit "$@"
}

is_upstart_task() {
	# Return 0 if the given service is an upstart task.
	grep -q '^task' "/etc/init/$1.conf"
}
is_upstart_running() {
	# Return 0 if the given service is running via upstart
	initctl status "$1" 2>/dev/null | grep -q running
}
upstart_start() {
	local service=$1
	if is_upstart_running "${service}"; then
		msg_already_running "$service"
		return 0
	fi

	msg_starting "${service}"
	if errors=$(/sbin/initctl start ${service} 2>&1) ; then
		ok
		return 0
	else
		fail
		echo "$errors" >&2
		return 1
	fi
}
upstart_stop() {
	local service=$1
	if ! is_upstart_running "${service}"; then
		msg_not_running "$name"
		return 0
	fi
	msg_stopping "${service}"
	if errors=$(/sbin/initctl stop ${service}) ; then
		ok
		return 0
	else
		fail
		echo "$errors" >&2
		return 1
	fi
}
upstart_reload() {
	local service=$1
	if ! is_upstart_running "${service}" && ! is_upstart_task "${service}" ; then
		return 0
	fi
	msg_reloading "${service}"
	if errors=$(/sbin/initctl reload ${service}) ; then
		ok
		return 0
	else
		fail
		echo "$errors" >&2
		return 1
	fi
}
upstart_status() {
	# get service status
	# should be compliant with
	# http://refspecs.freestandards.org/LSB_3.1.1/LSB-Core-generic/LSB-Core-generic/iniscrptact.html
	local service=$1
	local status
	if is_upstart_task "${service}" ; then
		# we probably should have a way to handle task status
		return 0
	fi
	if ! status=$(/sbin/initctl status "${service}") ; then
		# program or service status is not known
		return 4
	fi
	if strstr "$status" "running" ; then
		# program is running or service is OK
		echo "$status"
		return 0
	else
		# program is not running
		echo "$status"
		return 3
	fi
	# TODO: other statuses
}

_upstart_controlled() {
	# If the service is to be handled by upstart
	# execute the start/stop/etc. commands the upstart way
	if ! use_upstart; then
		return 0
	fi
	local script=$1
	shift
	local command=$1
	[ $# -gt 0 ] && shift
	local name=$(basename "$script")
	if [ ! -f /etc/init/${name}.conf ] ; then
		return 0
	fi
	local commands
	local extra_commands
	local has_configtest
	if [ "$1" = "--except" ] ; then
		shift
		commands="$*"
		for cmd in $commands ; do
			if [ "$command" = "$cmd" ] ; then
				return 0
			fi
			case "$cmd" in
				start|stop|status|reload|restart|try-restart|force-reload)
					;;
				configtest)
					has_configtest=yes
					extra_commands="|$cmd"
					;;
				*)
					extra_commands="|$cmd"
					;;
			esac
		done
	elif [ -n "$*" ] ; then
		commands="$*"
		local cmd
		local found=0
		# is there a better way
		for cmd in $commands ; do
			if [ "$command" = "$cmd" ] ; then
				found=1
				break;
			fi
		done
		if [ $found = 0 ] ; then
			# let the script handle it
			return 0
		fi
	fi
	case "$command" in
		start)
			upstart_start $name
			exit $?
			;;
		stop)
			upstart_stop $name
			exit $?
			;;
		status)
			upstart_status $name
			exit $?
			;;
		restart)
			if is_yes "$has_configtest" ; then
				"$script" configtest || exit 1
			fi
			upstart_stop $name
			upstart_start $name
			exit $?
			;;
		try-restart)
			if ! is_upstart_running "$name" ; then
				exit 0
			fi
			if is_yes "$has_configtest" ; then
				"$script" configtest || exit 1
			fi
			upstart_stop $name
			upstart_start $name
			exit $?
			;;
		reload)
			if is_yes "$has_configtest" ; then
				"$script" configtest || exit 1
			fi
			if is_upstart_task "$name" ; then
				nls "$command not implemented for $name"
				exit 3
			else
				upstart_reload "$name"
				exit $?
			fi
			;;
		force-reload)
			if is_yes "$has_configtest" ; then
				"$script" configtest || exit 1
			fi
			if is_upstart_task "$name" ; then
				upstart_stop "$name"
				upstart_start "$name"
				exit $?
			else
				upstart_reload "$name"
				exit $?
			fi
			;;
		*)
			msg_usage "$0 {start|stop|restart|reload|force-reload|status$extra_commands}"
			exit 3
			;;
	esac
	return 1 # should not happen
}

# Usage:
#	somewhere at the begining of init script:
#     upstart_controlled
#		- to pass implement all upstart commands via initctl
#                 start, stop, status, restart, reload and force_reload
#		  are implemented
#     upstart_controlled command...
#		- to pass handle only specific commands the upstart way
#                 and leave the rest to the script
#
alias upstart_controlled='_upstart_controlled $0 "$@"'

rc_gettext_init
rc_cache_init

#/*
# * Local variables:
# * mode: sh
# * indent-tabs-mode: notnil
# * End:
# *
# */