unrealircd/Config

#!/bin/sh
#
# Config script for UnrealIRCd
# (C) 2001-2021 The UnrealIRCd Team
#
# This configure script is free software; the UnrealIRCd Team gives 
# unlimited permission to copy, distribute and modify as long as the
# copyright headers stay intact
#
#
# Rewritten completely to be an interface to autoconf by codemastr
# This was inspired by the config by Michael Graff (explorer@flame.org)
# but was written from scratch

# In order to be faster than the old Config, this assumes that all information
# in the cache file is valid and therefore doesn't check it, so if you messed with
# default values thats your problem :P

# some bits edited by baafie on March 17 2004, every change marked.

# Remove trailing slash in paths (if any)
FIX_PATHNAMES () {
	BASEPATH="${BASEPATH%/}"
	BINDIR="${BINDIR%/}"
	DATADIR="${DATADIR%/}"
	CONFDIR="${CONFDIR%/}"
	MODULESDIR="${MODULESDIR%/}"
	LOGDIR="${LOGDIR%/}"
	CACHEDIR="${CACHEDIR%/}"
	DOCDIR="${DOCDIR%/}"
	TMPDIR="${TMPDIR%/}"
	PRIVATELIBDIR="${PRIVATELIBDIR%/}"
	SSLDIR="${SSLDIR%/}"
	CURLDIR="${CURLDIR%/}"
}

# Create and run the ./configure command with the appropriate
# options based on the users settings.
RUN_CONFIGURE () {
ARG=" "

if [ -z "$BINDIR" -o -z "$DATADIR" -o -z "$CONFDIR" -o -z "$MODULESDIR" -o -z "$LOGDIR" -o -z "$CACHEDIR" -o -z "$DOCDIR" -o -z "$TMPDIR" -o -z "$PRIVATELIBDIR" ]; then
	echo "Sorry './Config -quick' cannot be used because your 'config.settings'"
	echo "file either does not exist or is from an old UnrealIRCd version"
	echo "(older than UnrealIRCd 5.0.0)."
	echo ""
	echo "Please run './Config' without -quick and answer all questions."
	echo ""
	exit
fi


mkdir -p $TMPDIR
mkdir -p $PRIVATELIBDIR
mkdir -p $CONFDIR

# Do this even if we're not in advanced mode
if [ "$ADVANCED" = "1" ] ; then
if [ "$NOOPEROVERRIDE" = "1" ] ; then
	ARG="$ARG--with-no-operoverride "
fi
if [ "$OPEROVERRIDEVERIFY" = "1" ] ; then
	ARG="$ARG--with-operoverride-verify "
fi
fi
if test x"$SSLDIR" = "x" ; then
ARG="$ARG--enable-ssl "
else
ARG="$ARG--enable-ssl=$SSLDIR "
fi
# Ensure we install curl even if someone does ./Config -quick...
if [ "x$CURLDIR" = "x$UNREALCWD/extras/curl" ]; then
	INSTALLCURL=1
else
	# And that the path does not refer to eg an old unrealircd-1.2.3 either ;)
	if echo "$CURLDIR"|egrep -qi extras.*curl; then
		CURLDIR="$UNREALCWD/extras/curl"
		INSTALLCURL=1
	fi
fi
if [ "$INSTALLCURL" = "1" ]; then
	echo ""
	echo "You previously used cURL with the auto-install-script. This is no longer"
	echo "supported. You likely don't need it anyway, because since UnrealIRCd 6.0.0"
	echo "we support remote includes with the 'https' protocol without cURL."
	echo "You only need cURL for non-https such as insecure 'http', 'smb', 'ftp', etc."
	echo "I am disabling cURL support for you..."
	sleep 10
	CURLDIR=""
fi
if [ "$REMOTEINC" = "1" ] ; then
ARG="$ARG--enable-libcurl=$CURLDIR "
fi
if [ "$MAXCONNECTIONS_REQUEST" != "auto" ]; then
	ARG="$ARG--with-maxconnections=$MAXCONNECTIONS_REQUEST "
fi

ARG="$ARG--with-bindir=$BINDIR "
ARG="$ARG--with-datadir=$DATADIR "
ARG="$ARG--with-pidfile=$DATADIR/unrealircd.pid "
ARG="$ARG--with-controlfile=$DATADIR/unrealircd.ctl "
ARG="$ARG--with-confdir=$CONFDIR "
ARG="$ARG--with-modulesdir=$MODULESDIR "
ARG="$ARG--with-logdir=$LOGDIR "
ARG="$ARG--with-cachedir=$CACHEDIR "
ARG="$ARG--with-docdir=$DOCDIR "
ARG="$ARG--with-tmpdir=$TMPDIR "
ARG="$ARG--with-privatelibdir=$PRIVATELIBDIR "
ARG="$ARG--with-scriptdir=$BASEPATH "
ARG="$ARG--with-nick-history=$NICKNAMEHISTORYLENGTH "
ARG="$ARG--with-permissions=$DEFPERM "
ARG="$ARG--enable-dynamic-linking "
if [ "$GEOIP" = "classic" ]; then
	ARG="$ARG--enable-geoip-classic "
fi
if [ "$GEOIP" = "mmdb" -o "$GEOIP" = "libmaxminddb" ]; then
	ARG="$ARG--enable-mmdb "
fi
if [ "$SANITIZER" = "asan" ]; then
	ARG="$ARG--enable-asan "
fi
ARG="$ARG $EXTRAPARA "
CONF="./configure $ARG"
# remove possibly old instances of curl in ~/unrealircd/lib/
rm -f $PRIVATELIBDIR/*curl* 1>/dev/null 2>&1
# At least do SOME parallel compiling by default, IF:
# - the MAKE environment variable is not set
# - the MAKEFLAGS environment variable is not set
# - we are using GNU Make
if [ "x$MAKE" = "x" ]; then
	if [ "x$MAKEFLAGS" = "x" ]; then
		if make --version 2>&1|grep -q "GNU Make"; then
			LOWMEM=0
			if [ -f /proc/meminfo ]; then
				FREEKB="`cat /proc/meminfo |grep MemAvailable|awk '{ print $2 }'`"
				if [ "$FREEKB" != "" -a "$FREEKB" -lt 768000 ]; then
					LOWMEM=1
				fi
			fi
			if [ "$LOWMEM" = 0 ]; then
				echo "Running with 4 concurrent build processes by default (make -j4)."
				export MAKE='make -j4'
			else
				echo "System detected with less than 750MB available memory, not forcing parallel build."
			fi
		fi
	fi
fi

echo $CONF
$CONF || exit 1
cd "$UNREALCWD"

if [ "$QUICK" != "1" ] ; then
	if [ ! -f "$CONFDIR/unrealircd.conf" ]; then
		echo ""
		echo "You don't have an 'unrealircd.conf' yet in $CONFDIR"
		echo "Shall I put the example configuration file there?"
		echo "If so, enter the two letter language code that you want, or just press ENTER for English. Answer 'none' to skip."
		AVLANGS="en"
		cd doc/conf/examples 1>/dev/null 2>&1
		for lang in example.??.conf
		do
			ADDTHIS=$(echo "$lang"|sed 's/example.//g'|sed 's/.conf//g')
			AVLANGS="$AVLANGS $ADDTHIS"
		done
		cd - 1>/dev/null 2>&1
		echo "The available options are: $AVLANGS none"
		echo $n "[en] -> $c"
		read cc
		if [ "$cc" = "none" ]; then
			echo "Example config not copied."
		elif [ "$cc" = "en" -o "$cc" = "" ]; then
			cp doc/conf/examples/example.conf $CONFDIR/unrealircd.conf
		else
			cp doc/conf/examples/example.$cc.conf $CONFDIR/unrealircd.conf
		fi
	fi

	if [ ! -f $CONFDIR/tls/server.cert.pem -a ! -f $CONFDIR/ssl/server.cert.pem ]; then
		export OPENSSLPATH
		if [ "$GENCERTIFICATE" = 1 ]; then
			echo
			echo "*******************************************************************************"
			echo "Next you will be asked some questions in order to generate the TLS certificate."
			echo "IMPORTANT: If you don't own a domain or don't know what to answer, then you can"
			echo "           simply press ENTER or use fictional names for each question!"
			echo "*******************************************************************************"
			echo "Press ENTER to continue"
			read cc
			./unrealircd makecert
			echo "Certificate created successfully."
			sleep 1
		else
			echo "Ok, not generating TLS certificate. Make sure that the certificate and key"
			echo "are installed in conf/tls/server.cert.pem and conf/tls/server.key.pem prior to starting the IRCd."
		fi
	else
		echo "TLS certificate already exists in configuration directory, no need to regenerate."
	fi
fi

# Silently force a 'make clean' as otherwise part (or whole) of the
# compiled source could be using different settings than the user
# just requested when re-running ./Config.
$MAKE clean 1>/dev/null 2>&1
}

RUN_ADVANCED () {
TEST=""
while [ -z "$TEST" ] ; do
	if [ "$NOOPEROVERRIDE" = "1" ] ; then
		TEST="Yes"
	else
		TEST="No"
	fi
	echo ""
	echo "Do you want to disable oper override?"
	echo $n "[$TEST] -> $c"
	read cc
	if [ -z "$cc" ] ; then
		cc=$TEST
	fi
	case "$cc" in
	[Yy]*)
		NOOPEROVERRIDE="1"
		;;
	[Nn]*)
		NOOPEROVERRIDE=""
		;;
	*)
		echo ""
		echo "You must enter either Yes or No"
		TEST=""
		;;
	esac
done

TEST=""
while [ -z "$TEST" ] ; do
	if [ "$OPEROVERRIDEVERIFY" = "1" ] ; then
		TEST="Yes"
	else
		TEST="No"
	fi
	echo ""
	echo "Do you want to require opers to /invite themselves into a +s or +p channel?"
	echo $n "[$TEST] -> $c"
	read cc
	if [ -z "$cc" ] ; then
		cc=$TEST
	fi
	case "$cc" in
	[Yy]*)
		OPEROVERRIDEVERIFY="1"
		;;
	[Nn]*)
		OPEROVERRIDEVERIFY=""
		;;
	*)
		echo ""
		echo "You must enter either Yes or No"
		TEST=""
		;;
	esac
done

}
c=""
n=""
UNREALCWD="`pwd`"
BASEPATH="$HOME/unrealircd"
DEFPERM="0600"
SSLDIR=""
NICKNAMEHISTORYLENGTH="2000"
MAXCONNECTIONS_REQUEST="auto"
REMOTEINC=""
CURLDIR=""
NOOPEROVERRIDE=""
OPEROVERRIDEVERIFY=""
GENCERTIFICATE="1"
EXTRAPARA=""
SANITIZER=""
GEOIP="mmdb"
if [ "`eval echo -n 'a'`" = "-n a" ] ; then
	c="\c"
else
	n="-n"
fi


#parse arguments
IMPORTEDSETTINGS=""
NOINTRO=""
QUICK=""
ADVANCED=""
while [ $# -ge 1 ] ; do
	if [ "$1" = "-help" -o "$1" = "--help" -o "$1" = "-h" ] ; then
		echo "Config utility for UnrealIRCd"
		echo "-----------------------------"
		echo "Syntax: ./Config [options]"
		echo "-nointro     Skip intro (release notes, etc)"
		echo "-quick       Skip questions, go straight to configure"
		echo "-advanced    Include additional advanced questions"
		exit 0
	elif [ "$1" = "-nointro" ] ; then
		NOINTRO="1"
	elif [ "$1" = "-quick" -o "$1" = "-q" ] ; then
		QUICK="1"
		echo "running quick config"
		if [ -f "config.settings" ] ; then
			. ./config.settings
		fi
		FIX_PATHNAMES
		RUN_CONFIGURE
		cd "$UNREALCWD"
		exit 0
	elif [ "$1" = "-advanced" ] ; then
		PREADVANCED="1"
	fi
	shift 1
done

if [ "$PREADVANCED" = "1" ] ; then
	ADVANCED="1"
elif [ "$ADVANCED" = "1" ]; then
	ADVANCED=""
fi

if [ "`id -u`" = "0" ]; then
	echo "ERROR: You cannot build or run UnrealIRCd as root"
	echo ""
	echo "Please create a separate account for building and running UnrealIRCd."
	echo "See https://www.unrealircd.org/docs/Do_not_run_as_root"
	exit
fi

# Check for gmake early...
if [ "$MAKE" = "" ]; then
	MAKE="make"
fi

if ! $MAKE --version 2>&1|grep -q "GNU Make"; then
	# So $MAKE is not GNU make, but do we have gmake?
	if gmake --version 2>&1|grep -q "GNU Make"; then
		# Great, use that one!
		MAKE="gmake"
	else
		# Both $MAKE and gmake are not GNU make, do we have a working $MAKE at all?
		if command -v "$MAKE" 1>/dev/null 2>&1; then
			echo "Your system has 'make' but UnrealIRCd requires GNU Make ('gmake')"
			echo "Please install 'gmake' "
			echo "eg 'pkg install gmake' on FreeBSD and 'pkg_add gmake' on OpenBSD."
			exit 1
		else
			echo "Your system does not have the required tools installed to build UnrealIRCd."
			echo "Please check https://www.unrealircd.org/docs/Installing_from_source"
			echo "and install the required tools listed under 'Prerequisites'."
			echo "After that, you can run ./Config again"
			exit 1
		fi
	fi
fi


clear

if [ -f "doc/Config.header" -a -z "$NOINTRO" ] ; then
	cat doc/Config.header
	echo ""
	echo $n "[Press Enter to continue]"
	read cc
	clear
fi

echo "We will now ask you a number of questions. You can just press ENTER to accept the defaults!"
echo ""

# This needs to be updated each release so auto-upgrading works for settings, modules, etc!!:
UNREALRELEASES="6.2.5 6.2.4 6.2.4-rc1 6.2.3 6.2.3-rc2 6.2.3-rc1 6.2.2 6.2.1 6.2.1-rc2 6.2.1-rc1 6.2.0.2 6.2.0.1 6.2.0 6.2.0-beta3 6.2.0-beta2 6.2.0-beta1 6.1.10 6.1.10-rc1 6.1.9 6.1.8 6.1.8.1 6.1.8 6.1.8-rc1 6.1.7 6.1.7-rc1 6.1.6 6.1.6-rc1 6.1.5 6.1.4 6.1.3 6.1.3-rc1 6.1.2.3 6.1.2.2 6.1.2.1 6.1.2 6.1.2-rc2 6.1.2-rc1 6.1.1.1 6.1.1 6.1.0 6.1.0-rc2 6.1.0-rc1 6.0.7 6.0.6 6.0.5 6.0.5-rc2 6.0.5-rc1 6.0.4.2 6.0.4.1 6.0.4 6.0.4-rc2 6.0.4-rc1 6.0.3 6.0.2 6.0.1.1 6.0.1 6.0.0"
if [ -f "config.settings" ]; then
	. ./config.settings
else
	# Try to load a previous config.settings
	for x in $UNREALRELEASES
	do
		if [ -f ../unrealircd-$x/config.settings ]; then
			IMPORTEDSETTINGS="../unrealircd-$x"
			break
		fi
	done
	echo "If you have previously installed UnrealIRCd on this shell then you can specify a"
	echo "directory here so I can import the build settings and third party modules"
	echo "to make your life a little easier."
	if [ ! -z "$IMPORTEDSETTINGS" ]; then
		echo "Found previous installation in: $IMPORTEDSETTINGS."
		echo "You can enter a different path or type 'none' if you don't want to use it."
		echo "Just press Enter to accept the default settings."
	else
		echo "If you install UnrealIRCd for the first time on this shell, then just hit Enter";
	fi

	TEST="$IMPORTEDSETTINGS"
	echo $n "[$TEST] -> $c"
	read cc
	if [ -z "$cc" ]; then
		IMPORTEDSETTINGS="$TEST"
	else
		IMPORTEDSETTINGS="$cc"
	fi
	if [ "$IMPORTEDSETTINGS" = "none" ]; then
		IMPORTEDSETTINGS=""
	fi
	if [ "$IMPORTEDSETTINGS" != "" ]; then
		if [ -d $IMPORTEDSETTINGS/conf ]; then
			echo "ERROR: Directory $IMPORTEDSETTINGS is an INSTALLATION directory (eg /home/irc/unrealircd)."
			echo "This question was about a SOURCE directory (eg /home/irc/unrealircd-5.0.0)."
			exit
		fi
		if [ ! -f $IMPORTEDSETTINGS/config.settings ]; then
			echo "Directory $IMPORTEDSETTINGS does not exist or does not contain a config.settings file"
			exit
		fi
		COPYMODULES="1"
		if grep -q TOPICNICKISNUH $IMPORTEDSETTINGS/config.settings; then
			echo "Directory $IMPORTEDSETTINGS seems to be UnrealIRCd 4.x (or older)."
			echo "I will copy the settings but not any 3rd party modules, as they are incompatible with 5.x."
			COPYMODULES="0"
		fi
		# Actually load the settings
		. $IMPORTEDSETTINGS/config.settings
		if [ "$COPYMODULES" = "1" ]; then
			# Copy over 3rd party modules (also deals with 0 file cases, hence the silly looking code)
			for f in $IMPORTEDSETTINGS/src/modules/third/*.c
			do
				[ -e "$f" ] && cp $f src/modules/third/
			done
		fi
	fi
fi
# If we just imported settings and the curl dir is set to
# something like /home/xxx/unrealircd-5.x.y/extras/curl/
# (what we call 'local-curl') then remove this setting as
# it would refer to the old UnrealIRCd installation.
if [ ! -z "$IMPORTEDSETTINGS" ]; then
	if echo "$CURLDIR"|grep -qi unrealircd; then
		CURLDIR=""
	fi
fi

TEST="$BASEPATH"
echo ""
echo "In what directory do you want to install UnrealIRCd?"
echo "(Note: UnrealIRCd 6 will need to be installed somewhere."
echo " If this directory does not exist it will be created.)"
echo $n "[$TEST] -> $c"
read cc
if [ -z "$cc" ] ; then
	BASEPATH=$TEST
else
	BASEPATH=`eval echo $cc` # modified
fi
if [ "$BASEPATH" = "$UNREALCWD" ]; then
	echo ""
	echo "ERROR: The installation directory cannot be the same as the directory"
	echo "       containing the source code ($UNREALCWD)."
	echo " HINT: Usually the directory containing the source is $HOME/unrealircd-5.x.y"
	echo "       and the installation directory you would need to enter is $HOME/unrealircd"
	exit 1
fi

# TODO: For -advanced we could prompt the user.
BINDIR="$BASEPATH/bin"
DATADIR="$BASEPATH/data"
CONFDIR="$BASEPATH/conf"
MODULESDIR="$BASEPATH/modules"
LOGDIR="$BASEPATH/logs"
CACHEDIR="$BASEPATH/cache"
DOCDIR="$BASEPATH/doc"
TMPDIR="$BASEPATH/tmp"
PRIVATELIBDIR="$BASEPATH/lib"

TEST=""
while [ -z "$TEST" ] ; do
	TEST="$DEFPERM"
	echo ""
	echo "What should the default permissions for your configuration files be? (Set this to 0 to disable)"
	echo "It is strongly recommended that you use 0600 to prevent unwanted reading of the file"
	echo $n "[$TEST] -> $c"
	read cc
	if [ -z "$cc" ] ; then
		DEFPERM=$TEST
		break
	fi
	case "$cc" in
	[0-9]*)
		DEFPERM="$cc"
		;;
	*)
		echo ""
		echo "You must enter a number"
		TEST=""
		;;
	esac
done

echo ""
echo "If you want, you can manually enter the path to OpenSSL/LibreSSL here."
echo "In most cases you can leave this blank and it will be detected automatically."

if [ -z "$SSLDIR" ]; then
	uname|grep -q Darwin
	if [ "$?" = 0 ]; then
		echo "Looks like you're on a Mac - El Capitan and higher require"
		echo "a 3rd party OpenSSL installation. We recommend using homebrew"
		echo "to install OpenSSL, but you may install it any other way as well."
		echo "We are selecting the default homebrew OpenSSL path - but you can"
		echo "change it to another path if you have installed OpenSSL another way"
		SSLDIR="/usr/local/opt/openssl/"
	fi
fi

TEST="$SSLDIR"
echo $n "[$TEST] -> $c"
read cc
if [ -z "$cc" ] ; then
	SSLDIR="$TEST"
else 
	SSLDIR=`eval echo $cc` # modified
fi

if [ "$SSLDIR" != "" -a "$SSLDIR" != "/usr" ]; then
	echo ""
	echo "You answered previous question manually. Just note that if the library is not"
	echo "in your default library path then UnrealIRCd may fail to start with an error"
	echo "that it cannot find certain .so files (libraries). In that case you would have"
	echo "to either set the LD_LIBARY_PATH environment variable, or you could update the"
	echo "Makefile to link with -Wl,-rpath,$SSLDIR or similar."
	echo ""
	if [ "$SSLDIR" = "/usr/local" ]; then
		echo "**** CAUTION ****"
		echo "You have chosen to use OpenSSL from /usr/local. Just be aware that if you"
		echo "use the LD_LIBRARY_PATH or -Wl,-rpath,$SSLDIR from above,"
		echo "that you are diverting OTHER libraries to that path as well."
		echo "It's not only loading OpenSSL from /usr/local but also potentially other"
		echo "libraries like PCRE2, Jansson, or any of the other libraries that"
		echo "UnrealIRCd uses (including dependencies about 40 libs in total!)"
		echo "All that can result in weird issues and crashes!"
		echo ""
	fi
	echo "Press enter to continue with the rest of the questions, or CTRL+C to abort."
	read cc
fi

if [ ! -f $BASEPATH/conf/tls/server.cert.pem -a ! -f $BASEPATH/conf/ssl/server.cert.pem ]; then
	TEST=""
	while [ -z "$TEST" ] ; do
	  if [ "$GENCERTIFICATE" = "1" ] ; then
	    TEST="Yes"
	  else
	    TEST="No"
	  fi
	  echo ""
	  echo "UnrealIRCd requires a TLS certificate in order to work."
	  echo "Do you want to generate a self-signed TLS certificate for the IRCd?"
	  echo "Only answer No if you already have one."
	  echo $n "[$TEST] -> $c"
	  read cc
	  if [ -z "$cc" ] ; then
	  cc=$TEST
	  fi
	  case "$cc" in
	  [Yy]*)
	    GENCERTIFICATE="1"
	    ;;
	  [Nn]*)
	    GENCERTIFICATE=""
	    ;;
	  *)
	    echo ""
	    echo "You must enter either Yes or No"
	    TEST=""
	    ;;
	  esac
	done
fi

if echo "$CURLDIR"|egrep -qi extras.*curl; then
	REMOTEINC=""
	CURLDIR=""
	echo ""
	echo "You previously used cURL with the auto-install-script. This is no longer"
	echo "supported. You likely don't need it anyway, because since UnrealIRCd 6.0.0"
	echo "we support remote includes with the 'https' protocol without cURL."
	echo "You only need cURL for non-https such as insecure 'http', 'smb', 'ftp', etc."
	echo "I am disabling cURL support for you..."
	echo "(Press enter to continue)"
	read cc
fi

TEST=""
while [ -z "$TEST" ] ; do
	if [ "$REMOTEINC" = "1" ] ; then
		TEST="Yes"
	else
		TEST="No"
	fi
	echo ""
	echo "UnrealIRCd always supports 'remote includes' for https URLs like:"
	echo "include \"https://www.example.org/files/opers.conf\";"
	echo "Do you also need support for non-https, such as ftp, tftp, smb or insecure http?"
	echo "Answer 'Yes' if you need such protocols and want to use the cURL library."
	echo "By default (answer 'No') we only support the https protocol, which is perfectly fine for most people."
	echo $n "[$TEST] -> $c"
	read cc
	if [ -z "$cc" ] ; then
		cc=$TEST
	fi
	case "$cc" in
	[Yy]*)
		REMOTEINC="1"
		;;
	[Nn]*)
		REMOTEINC=""
		CURLDIR=""
		;;
	*)
		echo ""
		echo "You must enter either Yes or No"
		TEST=""
		;;
	esac
done

if [ "$REMOTEINC" = "1" ] ; then
	if [ ! -d "$CURLDIR" ]; then
		# Reset any previous CURLDIR if it doesn't exist (anymore)
		CURLDIR=""
	fi

	SUGGESTCURLDIR=""

	if [ -d "/usr/local/include/curl" ]; then
		SUGGESTCURLDIR="/usr/local"
	fi
	if [ -d "/usr/include/curl" ]; then
		SUGGESTCURLDIR="/usr"
	fi
	# This one also works for /usr/include/x86_64-linux-gnu and friends:
	if [ -f "/usr/bin/curl-config" ]; then
		SUGGESTCURLDIR="/usr"
	fi

	GOTASYNC=0
	if [ "x$SUGGESTCURLDIR" != "x" ]; then
		# Check if it's of any use: a curl without async dns (cares) hangs the entire ircd..
		# normally this is done in ./configure but now we're forced to do it also here..
		if "$SUGGESTCURLDIR"/bin/curl-config --features | grep -q -e AsynchDNS; then
			GOTASYNC="1"
		fi
		if [ "$GOTASYNC" != "1" ]; then
			SUGGESTCURLDIRBAD="$CURLDIR"
			SUGGESTCURLDIR=""
		fi
	fi

	if [ "x$CURLDIR" = "x$HOME/curl" ]; then
		if [ "x$SUGGESTCURLDIR" != "x" ]; then
			# I guess some people will complain about this, but if system wide cURL is available
			# and many people have old defaults then this is much preferred:
			echo ""
			echo "WARNING: Your previous (potentially old) setting is to use cURL from $HOME/curl."
			echo "However, your operating system also provides a working cURL."
			echo "I am therefore changing the setting to: $SUGGESTCURLDIR"
			CURLDIR="$SUGGESTCURLDIR"
		else
			echo ""
			echo "WARNING: We no longer use $HOME/curl nowadays."
			echo "Use the automatic download and install feature below."
			CURLDIR=""
		fi
	fi

	if [ "x$CURLDIR" = "x" ]; then
		CURLDIR="$SUGGESTCURLDIR"
		# NOTE: CURLDIR may still be empty after this

		# System curl has no asyncdns, so install our own.
		if [ "$GOTASYNC" != "1" ]; then
			CURLDIR=""
		fi

		# Need to output it here, as the HOME check from above may cause this to be no longer relevant.
		if [ "x$CURLDIR" = "x" -a "x$SUGGESTCURLDIRBAD" != "x" ]; then
			echo "Curl library was found in $SUGGESTCURLDIRBAD, but it does not support Asynchronous DNS (not compiled with c-ares)"
			echo "so it's of no use to us as it would stall the IRCd on REHASH."
		fi
	fi

	# Final check
	if [ "x$CURLDIR" != "x" ]; then
		"$CURLDIR/bin/curl-config" --features 2>/dev/null | grep -q -e AsynchDNS
		if [ "$?" != 0 ]; then
			echo "Curl from $CURLDIR seems unusable ($CURLDIR/bin/curl-config does not exist) -- cURL disabled."
			CURLDIR=""
		fi
	fi

	if [ "x$CURLDIR" = "x" ]; then
		echo ""
		echo "ERROR: the cURL library could not be found and you said you needed it for remote includes."
		echo ""
		echo "Note that you only need cURL if you need remote includes with protocols like insecure 'http', 'smb', 'ftp', etc."
		echo "You DO NOT need this for 'https' remote includes, as https support works without cURL since UnrealIRCd 6.0.0!"
		echo ""
		echo "Solution:"
		echo "A) Re-run ./Config and answer 'No' to the question 'Do you also need support for non-https'"
		echo "B) Or install the cURL library in the system (eg 'apt-get install libcurl4-openssl-dev' or similar)"
		echo "   and then re-run ./Config"
		exit 1
	fi

	TEST=""
	while [ -z "$TEST" ] ; do
		TEST="$CURLDIR"
		echo ""
		echo "Specify the directory you installed libcurl to"
		echo $n "[$TEST] -> $c"
		read cc
		if [ -z "$cc" ] ; then
			cc=$TEST
		else
			TEST=$cc
			CURLDIR=`eval echo $cc` # modified
		fi
	done
	if [ "x$CURLDIR" != "x" ]; then
		"$CURLDIR/bin/curl-config" --libs 1>/dev/null 2>&1
		if [ "$?" != 0 ]; then
			echo "Curl from $CURLDIR seems unusable ($CURLDIR/bin/curl-config does not exist)"
			CURLDIR=""
		fi
	fi
fi


TEST=""
while [ -z "$TEST" ] ; do
	TEST="$NICKNAMEHISTORYLENGTH"
	echo ""
	echo "How far back do you want to keep the nickname history?"
	echo $n "[$TEST] -> $c"
	read cc
	if [ -z "$cc" ] ; then
		NICKNAMEHISTORYLENGTH=$TEST
		break
	fi
	case "$cc" in
	[1-9]*)
		NICKNAMEHISTORYLENGTH="$cc"
		;;
	*)
		echo ""
		echo "You must enter a number"
		TEST=""
		;;
	esac
done

TEST=""
while [ -z "$TEST" ] ; do
	TEST="$GEOIP"
	echo ""
	echo "GeoIP is a feature that allows converting an IP address to a location (country)"
	echo "Possible build options:"
	echo "classic: This is the classic (OLD) geoip engine. Slowly being phased out."
	echo "         It receives automatic updates."
	echo "   mmdb: This uses the build-in mmdb library. It is the NEW geoip engine."
	echo "         It receives automatic updates as well."
	echo "   none: Don't build classic, and load neither classic nor mmdb by default."
	echo "Choose one of: classic, mmdb, none"
	echo $n "[$TEST] -> $c"
	read cc
	if [ -z "$cc" ] ; then
		GEOIP=$TEST
		break
	fi
	case "$cc" in
	classic)
		GEOIP="$cc"
		;;
	mmdb)
		GEOIP="$cc"
		;;
	none)
		GEOIP="$cc"
		;;
	*)
		echo ""
		echo "Invalid choice: $cc"
		TEST=""
		;;
	esac
done

TEST=""
while [ -z "$TEST" ] ; do
	TEST="$MAXCONNECTIONS_REQUEST"
	echo ""
	echo "What is the maximum number of sockets (and file descriptors) that"
	echo "UnrealIRCd may use?"
	echo "It is recommended to leave this at the default setting 'auto',"
	echo "which at present results in a limit of up to 16384, depending on"
	echo "the system. When you boot UnrealIRCd later you will always see"
	echo "the effective limit."
	echo $n "[$TEST] -> $c"
	read cc
	if [ -z "$cc" ] ; then
		MAXCONNECTIONS_REQUEST=$TEST
		break
	fi
	case "$cc" in
		auto)
			MAXCONNECTIONS_REQUEST="$cc"
			;;
		[1-9][0-9][0-9]*)
			MAXCONNECTIONS_REQUEST="$cc"
			;;
		*)
			echo ""
			echo "You must to enter a number greater than or equal to 100."
			echo "Or enter 'auto' to leave it at automatic, which is recommended."
			TEST=""
			;;
	esac
done
if [ -n "$ADVANCED" ] ; then
	RUN_ADVANCED
fi

TEST=""
while [ -z "$TEST" ] ; do
	if [ "$SANITIZER" = "asan" ] ; then
		TEST="Yes"
	else
		TEST="No"
	fi
	echo ""
	echo "Are you running UnrealIRCd as a test, debugging a problem or developing a module?"
	echo "Then it is possible to run with AddressSanitizer and UndefinedBehaviorSanitizer"
	echo "enabled. This will catch bugs, such as out-of-bounds and other memory corruption"
	echo "issues, which can be really helpful in some cases. The downside is that it will"
	echo "consume a lot more memory and run slower too. So, only answer 'Yes' if you are"
	echo "OK with this. Also, on some systems (notably FreeBSD <14.2), when you enable"
	echo "this UnrealIRCd may fail to start. So when in doubt, answer 'No'."
	echo "Do you want to enable AddressSanitizer & UndefinedBehaviorSanitizer?"
	echo $n "[$TEST] -> $c"
	read cc
	if [ -z "$cc" ] ; then
		cc=$TEST
	fi
	case "$cc" in
	[Yy]*)
		SANITIZER="asan"
		;;
	[Nn]*)
		SANITIZER=""
		;;
	*)
		echo ""
		echo "You must enter either Yes or No"
		TEST=""
		;;
	esac
done

TEST="$EXTRAPARA"
echo ""
echo "Would you like to pass any custom parameters to configure?"
echo "Most people don't need this and can just press ENTER."
echo "Otherwise, see \`./configure --help' and write them here:"
echo $n "[$TEST] -> $c"
read EXTRAPARA
if [ -z "$EXTRAPARA" ]; then
	EXTRAPARA="$TEST"
fi

FIX_PATHNAMES

rm -f config.settings
cat > config.settings << __EOF__
#
# These are the settings saved from running './Config'.
# Note that it is not recommended to edit config.settings by hand!
# Chances are you misunderstand what a variable does or what the
# supported values are. You better just re-run the ./Config script
# and answer appropriately there, to get a correct config.settings
# file.
#
BASEPATH="$BASEPATH"
BINDIR="$BINDIR"
DATADIR="$DATADIR"
CONFDIR="$CONFDIR"
MODULESDIR="$MODULESDIR"
LOGDIR="$LOGDIR"
CACHEDIR="$CACHEDIR"
DOCDIR="$DOCDIR"
TMPDIR="$TMPDIR"
PRIVATELIBDIR="$PRIVATELIBDIR"
MAXCONNECTIONS_REQUEST="$MAXCONNECTIONS_REQUEST"
NICKNAMEHISTORYLENGTH="$NICKNAMEHISTORYLENGTH"
GEOIP="$GEOIP"
DEFPERM="$DEFPERM"
SSLDIR="$SSLDIR"
REMOTEINC="$REMOTEINC"
CURLDIR="$CURLDIR"
NOOPEROVERRIDE="$NOOPEROVERRIDE"
OPEROVERRIDEVERIFY="$OPEROVERRIDEVERIFY"
GENCERTIFICATE="$GENCERTIFICATE"
SANITIZER="$SANITIZER"
EXTRAPARA="$EXTRAPARA"
ADVANCED="$ADVANCED"
__EOF__
RUN_CONFIGURE
cd "$UNREALCWD"
cat << __EOF__

 _______________________________________________________________________
|                                                                       |
|                    UnrealIRCd Compile-Time Config                     |
|_______________________________________________________________________|
|_______________________________________________________________________|
|                                                                       |
|                        - The UnrealIRCd Team -                        |
|                                                                       |
|              Bram Matthys (Syzop) - syzop@unrealircd.org              |
|       Krzysztof Beresztant (k4be) - k4be@unrealircd.org               |
|                            Gottem - gottem@unrealircd.org             |
|                                 i - i@unrealircd.org                  |
|_______________________________________________________________________|
|_______________________________________________________________________|
|                                                                       |
| Now all you have to do is type '$MAKE' and let it compile. When that's |
| done, you will receive other instructions on what to do next.         |
|_______________________________________________________________________|
__EOF__