Silly little patch.

dobroho_vechora.bash

@@ -1,34 +1,75 @@
 #!/bin/bash
 set -e
-ip="${1}"
+
-port="${2}"
+mode="${1}"
+ip="${2}"
+port="${3}"
+nick="${4}"
 
 print_usage() {
 	echo "${1}"
-	echo "${0} <IP> <PORT>"
+	echo "${0} <MODE> <IP> <PORT> [NICK]"
+	echo "Modes: interactive (intr), send, receive (rec)"
 	exit
 }
 [ -z "${ip}" ]   && print_usage 'No IP given.'
 [ -z "${port}" ] && print_usage 'No port given.'
-[ -z "${3}" ]    || print_usage 'Too many arguments.'
+[ -z "${5}" ]    || print_usage 'Too many arguments.'
+
+[ -z "${nick}" ] || nick="<${nick}> "
+
+open_socket() {
+	exec 3<> "/dev/tcp/${ip}/${port}"
+}
+
+close_socket() {
+	exec 3>&-
+}
 
 send_message() {
-	exec 3<> "/dev/tcp/${ip}/${port}"
+	open_socket
 	echo "${1}" >&3
-	exec 3>&-
+	close_socket
 }
 
 get_message() {
-	exec 3<> "/dev/tcp/${ip}/${port}"
+	open_socket
 	echo "${1}" >&3
-	timeout 1s cat <&3 || true
+	cat <&3 || true
-	exec 3>&-
+	close_socket
 }
 
+case "${mode}" in
+	intr)
+		;&
+	interactive)
+		;;
+	send)
+		open_socket
+		text="${nick}$(cat)"
+		send_message "0${text}"
+		close_socket
+		exit
+		;;
+	rec)
+		;&
+	receive)
+		length="$(get_message 1)"
+		open_socket
+		echo -n 2 >&3
+		head -c "${length}" <&3 
+		close_socket
+		exit
+		;;
+	*)
+		echo Unknown mode
+		exit
+esac
+
 while :; do
 	read cmd
 	case "${cmd}" in
-		i)
+		I)
 			b=""
 			while :; do
 				read c
@@ -39,15 +80,22 @@ while :; do
 					b="${b}"$'\n'"${c}"
 				fi
 			done
-			send_message 0"${b}"
+			send_message 0"${nick}${b}"
 			;;
-		I)
+		i)
 			read a
-			send_message 0"${a}"
+			send_message 0"${nick}${a}"
 			;;
 		p)
-			send_message 1
+			length="$(get_message 1)"
-			get_message 2 | sed -e 's/\x1B/ESC/g'
+			if [ -z "${length}" ]; then
+				echo !;
+			else
+				open_socket
+				echo -n 2 >&3
+				head -c "${length}" <&3 | sed -e 's/\x1B/ESC/g' 
+				close_socket
+			fi
 			;;
 		q)
 			exit