functions.sh

#####################################################
# Source https://mailinabox.email/ https://github.com/mail-in-a-box/mailinabox
# Updated by cryptopool.builders for crypto use...
#####################################################

ESC_SEQ="\x1b["
COL_RESET=$ESC_SEQ"39;49;00m"
RED=$ESC_SEQ"31;01m"
GREEN=$ESC_SEQ"32;01m"
YELLOW=$ESC_SEQ"33;01m"
BLUE=$ESC_SEQ"34;01m"
MAGENTA=$ESC_SEQ"35;01m"
CYAN=$ESC_SEQ"36;01m"

function spinner
 {
 		local pid=$!
 		local delay=0.75
 		local spinstr='|/-\'
 		while [ "$(ps a | awk '{print $1}' | grep $pid)" ]; do
 				local temp=${spinstr#?}
 				printf " [%c]  " "$spinstr"
 				local spinstr=$temp${spinstr%"$temp"}
 				sleep $delay
 				printf "\b\b\b\b\b\b"
 		done
 		printf "    \b\b\b\b"
 }


function hide_output {
		OUTPUT=$(tempfile)
		$@ &> $OUTPUT & spinner
		E=$?
		if [ $E != 0 ]; then
		echo
		echo FAILED: $@
		echo -----------------------------------------
		cat $OUTPUT
		echo -----------------------------------------
		exit $E
		fi

		rm -f $OUTPUT
}

function apt_get_quiet {
		DEBIAN_FRONTEND=noninteractive hide_output sudo apt-get -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confnew" "$@"
}

function apt_install {
		PACKAGES=$@
		apt_get_quiet install $PACKAGES
}

function ufw_allow {
		if [ -z "$DISABLE_FIREWALL" ]; then
		sudo ufw allow $1 > /dev/null;
		fi
}

function restart_service {
		hide_output sudo service $1 restart
}

## Dialog Functions ##
function message_box {
		dialog --title "$1" --msgbox "$2" 0 0
}

function input_box {
		# input_box "title" "prompt" "defaultvalue" VARIABLE
		# The user's input will be stored in the variable VARIABLE.
		# The exit code from dialog will be stored in VARIABLE_EXITCODE.
		declare -n result=$4
		declare -n result_code=$4_EXITCODE
		result=$(dialog --stdout --title "$1" --inputbox "$2" 0 0 "$3")
		result_code=$?
}

function input_menu {
		# input_menu "title" "prompt" "tag item tag item" VARIABLE
		# The user's input will be stored in the variable VARIABLE.
		# The exit code from dialog will be stored in VARIABLE_EXITCODE.
		declare -n result=$4
		declare -n result_code=$4_EXITCODE
		local IFS=^$'\n'
		result=$(dialog --stdout --title "$1" --menu "$2" 0 0 0 $3)
		result_code=$?
}

function get_publicip_from_web_service {
		# This seems to be the most reliable way to determine the
		# machine's public IP address: asking a very nice web API
		# for how they see us. Thanks go out to icanhazip.com.
		# See: https://major.io/icanhazip-com-faq/
		#
		# Pass '4' or '6' as an argument to this function to specify
		# what type of address to get (IPv4, IPv6).
		curl -$1 --fail --silent --max-time 15 icanhazip.com 2>/dev/null
}

function get_default_privateip {
		# Return the IP address of the network interface connected
		# to the Internet.
		#
		# Pass '4' or '6' as an argument to this function to specify
		# what type of address to get (IPv4, IPv6).
		#
		# We used to use `hostname -I` and then filter for either
		# IPv4 or IPv6 addresses. However if there are multiple
		# network interfaces on the machine, not all may be for
		# reaching the Internet.
		#
		# Instead use `ip route get` which asks the kernel to use
		# the system's routes to select which interface would be
		# used to reach a public address. We'll use 8.8.8.8 as
		# the destination. It happens to be Google Public DNS, but
		# no connection is made. We're just seeing how the box
		# would connect to it. There many be multiple IP addresses
		# assigned to an interface. `ip route get` reports the
		# preferred. That's good enough for us. See issue #121.
		#
		# With IPv6, the best route may be via an interface that
		# only has a link-local address (fe80::*). These addresses
		# are only unique to an interface and so need an explicit
		# interface specification in order to use them with bind().
		# In these cases, we append "%interface" to the address.
		# See the Notes section in the man page for getaddrinfo and
		# https://discourse.mailinabox.email/t/update-broke-mailinabox/34/9.
		#
		# Also see ae67409603c49b7fa73c227449264ddd10aae6a9 and
		# issue #3 for why/how we originally added IPv6.

		target=8.8.8.8

		# For the IPv6 route, use the corresponding IPv6 address
		# of Google Public DNS. Again, it doesn't matter so long
		# as it's an address on the public Internet.
		if [ "$1" == "6" ]; then target=2001:4860:4860::8888; fi

		# Get the route information.
		route=$(ip -$1 -o route get $target | grep -v unreachable)

		# Parse the address out of the route information.
		address=$(echo $route | sed "s/.* src \([^ ]*\).*/\1/")

		if [[ "$1" == "6" && $address == fe80:* ]]; then
		# For IPv6 link-local addresses, parse the interface out
		# of the route information and append it with a '%'.
		interface=$(echo $route | sed "s/.* dev \([^ ]*\).*/\1/")
		address=$address%$interface
		fi

		echo $address

}