#	$OpenBSD: rc.subr,v 1.92 2015/01/02 14:44:05 ajacoutot Exp $
#
# Copyright (c) 2010, 2011, 2014 Antoine Jacoutot <ajacoutot@openbsd.org>
# Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>
# Copyright (c) 2010, 2011, 2014 Robert Nagy <robert@openbsd.org>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

_rc_err() {
	echo "$1" 1>&2
	[ -n "${2}" ] && exit "${2}" || exit 1
}

_rc_is_supported() {
	local _enotsup
	eval _enotsup=\${rc_$1}
	[ X"${_enotsup}" != X"NO" ]
}

_rc_usage() {
	local _a _allsup
	for _a in start stop restart reload check; do
		_rc_is_supported ${_a} && _allsup="${_allsup:+$_allsup|}${_a}"
	done
	_rc_err "usage: $0 [-df] ${_allsup}"
}

_rc_write_runfile() {
	[ -d ${_RC_RUNDIR} ] || mkdir -p ${_RC_RUNDIR} && \
		print -rn -- "${pexp}" > ${_RC_RUNFILE}
}

_rc_read_runfile() {
	local _new_pexp
	[ -f ${_RC_RUNFILE} ] && _new_pexp=$(< ${_RC_RUNFILE})
	[ -n "${_new_pexp}" ] && pexp="${_new_pexp}"
}

_rc_rm_runfile() {
	rm -f ${_RC_RUNFILE}
}

_rc_do() {
	if [ -n "${_RC_DEBUG}" ]; then
		echo "doing $@" && "$@"
	else
		"$@" >/dev/null 2>&1
	fi
}

_rc_exit() {
	local _pfix
	[ -z "${INRC}" -o X"$1" != X"ok" ] && _pfix="($1)"
	echo ${INRC:+'-n'} "${_pfix}"
	[ X"$1" = X"ok" ] && exit 0 || exit 1
}

_rc_wait() {
	local _i=0
	while [ $_i -lt ${daemon_timeout} ]; do
		case "$1" in
			reload|start)
				_rc_do rc_check && return 0
				;;
			stop)
				_rc_do rc_check || return 0
				;;
			*)
				break
				;;
		esac
		sleep 1
		_i=$((_i+1))
	done
	return 1
}

_rc_quirks() {
	# special care needed for spamlogd to avoid starting it up and failing
	# all the time
	if [  X"${spamd_flags}" = X"NO" -o X"${spamd_black}" != X"NO" ]; then
		spamlogd_flags=NO
	fi

	# special care needed for pflogd to avoid starting it up and failing
	# if pf is not enabled
	if [ X"${pf}" = X"NO" ]; then
		pflogd_flags=NO
	fi

	# special care needed if nfs_server=YES to startup nfsd and mountd with
	# sane default flags
	if [ X"${nfs_server}" = X"YES" ]; then
		[ X"${nfsd_flags}" = X"NO" ] && nfsd_flags="-tun 4"
		[ X"${mountd_flags}" = X"NO" ] && mountd_flags=
	fi

	# in case domainname is set and /var/yp/binding exists enable ypbind
	if [ X"`domainname`" != X"" -a -d /var/yp/binding ]; then
		ypbind_flags=
	fi
}

_rc_parse_conf() {
	typeset -l _key
	local _l _val
	set -A _allowed_keys -- \
		spamd_black pf ipsec check_quotas accounting \
		multicast_host multicast_router amd_master \
		pf_rules ipsec_rules shlib_dirs pkg_scripts \
		nfs_server

	[ $# -gt 0 ] || set -- /etc/rc.conf /etc/rc.conf.local
	for _rcfile; do
		[[ -f $_rcfile ]] || continue
		while IFS=' 	' read -r _l; do
			[[ $_l == [!#=]*=* ]] || continue
			_key=${_l%%*([[:blank:]])=*}
			[[ $_key == *_@(flags|user|timeout) ]] || \
				[[ " ${_allowed_keys[*]} " == *" $_key "* ]] || \
				continue
			[[ $_key == "" ]] && continue
			_val=${_l##*([!=])=*([[:blank:]])}
			_val=${_val%%#*}
			_val=${_val%%*([[:blank:]])}
			# remove leading and trailing quotes (backwards compat)
			[[ $_val == @(\"*\"|\'*\') ]] && _val=${_val#?} _val=${_val%?}
			eval "${_key}=\${_val}"
		done < $_rcfile
	done

	_rc_do _rc_quirks
}

# return if we only want internal functions
[ -n "${FUNCS_ONLY}" ] && return

rc_start() {
	${rcexec} "${daemon} ${daemon_flags} ${_bg}"
}

rc_check() {
	pgrep -q -f "^${pexp}"
}

rc_reload() {
	pkill -HUP -f "^${pexp}"
}

rc_stop() {
	pkill -f "^${pexp}"
}

rc_cmd() {
	local _bg _n

	[ "$(id -u)" -eq 0 ] || \
		[ X"${rc_usercheck}" != X"NO" -a X"$1" = "Xcheck" ] || \
		_rc_err "$0: need root privileges"

	if ! (_rc_is_supported start && _rc_is_supported stop); then
		rc_restart=NO
	fi

	if ! _rc_is_supported $1; then
		[ -n "${INRC}" ] && exit 1
		_rc_err "$0: $1 is not supported"
	fi

	[ X"${rc_bg}" = X"YES" ] && _bg="&"
	[ -n "${_RC_DEBUG}" ] || _n="-n"

	_rc_do _rc_read_runfile

	case "$1" in
	check)
		echo $_n "${INRC:+ }${_name}"
		_rc_do rc_check && _rc_exit ok
		_rc_exit failed
		;;
	start)
		if [ X"${daemon_flags}" = X"NO" ]; then
			_rc_err "$0: need -f to force $1 since ${_name}_flags=NO"
			exit 1
		fi
		[ -z "${INRC}" ] && _rc_do rc_check && exit 0
		echo $_n "${INRC:+ }${_name}"
		while true; do  # no real loop, only needed to break
			if type rc_pre >/dev/null; then
				_rc_do rc_pre || break
			fi
			# XXX only checks the status of the return code,
			# and _not_ that the daemon is actually running
			_rc_do rc_start || break
			if [ -n "${_bg}" ]; then
				sleep 1
				_rc_do _rc_wait start || break
			fi
			_rc_do _rc_write_runfile
			_rc_exit ok
		done
		# handle failure
		type rc_post >/dev/null && _rc_do rc_post
		_rc_do _rc_rm_runfile
		_rc_exit failed
		;;
	stop)
		_rc_do rc_check || exit 0
		echo $_n "${INRC:+ }${_name}"
		_rc_do rc_stop || _rc_exit failed
		_rc_do _rc_wait stop || _rc_exit failed
		if type rc_post >/dev/null; then \
			_rc_do rc_post || _rc_exit failed
		fi
		_rc_do _rc_rm_runfile
		_rc_exit ok
		;;
	reload)
		echo $_n "${INRC:+ }${_name}"
		_rc_do rc_check && _rc_do rc_reload || _rc_exit failed
		_rc_do _rc_wait reload || _rc_exit failed
		_rc_exit ok
		;;
	restart)
		$0 ${_RC_DEBUG} ${_RC_FORCE} stop &&
			$0 ${_RC_DEBUG} ${_RC_FORCE} start
		;;
	*)
		_rc_usage
		;;
	esac
}

[ -n "${daemon}" ] || _rc_err "$0: daemon is not set"

unset _RC_DEBUG _RC_FORCE
while getopts "df" c; do
	case "$c" in
		d) _RC_DEBUG=-d;;
		f) _RC_FORCE=-f;;
		*) _rc_usage;;
	esac
done
shift $((OPTIND-1))

_name=$(basename $0)
_RC_RUNDIR=/var/run/rc.d
_RC_RUNFILE=${_RC_RUNDIR}/${_name}

# parse /etc/rc.conf{.local} for the daemon_flags
_rc_do _rc_parse_conf

eval _rcflags=\${${_name}_flags}
eval _rcuser=\${${_name}_user}
eval _rctimeout=\${${_name}_timeout}

getcap -f /etc/login.conf ${_name} 1>/dev/null 2>&1 && \
	daemon_class=${_name}

# set default values; duplicated in rcctl(8)
[ -z "${daemon_class}" ] && daemon_class=daemon
[ -z "${daemon_user}" ] && daemon_user=root
[ -z "${daemon_timeout}" ] && daemon_timeout=30

[ -n "${_RC_FORCE}" ] && [ X"${_rcflags}" = X"NO" ] && unset _rcflags
[ -n "${_rcflags}" ] && daemon_flags=${_rcflags}
[ -n "${_rcuser}" ] && daemon_user=${_rcuser}
[ -n "${_rctimeout}" ] && daemon_timeout=${_rctimeout}

if [ -n "${_RC_DEBUG}" ]; then
	echo -n "${_name}_flags "
	[ -n "${_rcflags}" ] || echo -n "empty, using default "
	echo ">${daemon_flags}<"
fi

readonly daemon_class
unset _rcflags _rcuser _rctimeout
pexp="${daemon}${daemon_flags:+ ${daemon_flags}}"
rcexec="su -l -c ${daemon_class} -s /bin/sh ${daemon_user} -c"