Allow interrupting "w".

dobroho_vechora.bash

@@ -70,16 +70,22 @@ print_messages() {
 }
 
 wait_for_messages() {
+	tmp=0
+	trap 'tmp=1' INT
 	oldlength="${length}"
 	while :; do
 		length="$(get_message 1)"
 		if [ "${oldlength}" -ne "${length}" ]; then
-			break
+			trap - INT
+			return 0
+		fi
+		if [ "${tmp}" -eq 1 ]; then
+			trap - INT
+			return 1
 		fi
 		echo -n .
 		sleep 1
 	done
-	echo
 }
 
 length=0
@@ -103,11 +109,14 @@ while :; do
 			echo "${length}"
 			;;
 		w)
-			wait_for_messages
-			print_messages "${length}"
-			if [ -n "${DOBROHO_VECHORA_ON_WAIT}" ]; then
-				${DOBROHO_VECHORA_ON_WAIT}
-			fi
+			wait_for_messages &&
+			{
+				echo
+				print_messages "${length}"
+				if [ -n "${DOBROHO_VECHORA_ON_WAIT}" ]; then
+					${DOBROHO_VECHORA_ON_WAIT}
+				fi
+			}
 			;;
 		p)
 			length="$(get_message 1)"