Show error if disconnected unintentionally

chat.h

@@ -44,6 +44,7 @@ struct {
 	char *join;
 	bool verbose;
 	bool notify;
+	bool quit;
 } self;
 
 void eventWait(const char *argv[static 2]);

event.c

@@ -131,10 +131,14 @@ noreturn void eventLoop(void) {
 
 	for (;;) {
 		if (sig[SIGCHLD]) childWait();
-		if (sig[SIGHUP]) ircFmt("QUIT :zzz\r\n");
+		if (sig[SIGHUP]) {
+			ircFmt("QUIT :zzz\r\n");
+			self.quit = true;
+		}
 		if (sig[SIGINT]) {
 			signal(SIGINT, SIG_DFL);
 			ircFmt("QUIT :Goodbye\r\n");
+			self.quit = true;
 		}
 		if (sig[SIGWINCH]) {
 			curses.sa_handler(SIGWINCH);

handle.c

@@ -95,11 +95,14 @@ static void handlePing(char *prefix, char *params) {
 }
 
 static void handleError(char *prefix, char *params) {
-	(void)prefix;
-	(void)params;
-	// TODO: Show error if unintended disconnect.
-	uiExit();
-	exit(EX_OK);
+	char *mesg;
+	parse(prefix, NULL, NULL, NULL, params, 1, 0, &mesg);
+	if (self.quit) {
+		uiExit();
+		exit(EX_OK);
+	} else {
+		errx(EX_PROTOCOL, "%s", mesg);
+	}
 }
 
 static void handleErrorErroneousNickname(char *prefix, char *params) {

input.c

@@ -106,6 +106,7 @@ static void inputTopic(struct Tag tag, char *params) {
 static void inputQuit(struct Tag tag, char *params) {
 	(void)tag;
 	ircFmt("QUIT :%s\r\n", params ? params : "Goodbye");
+	self.quit = true;
 }
 
 static void inputURL(struct Tag tag, char *params) {