Fix input wrapping when terminal size changed

src/main.cc

@@ -84,7 +84,7 @@ static char *pid_file = NULL;
 static char **main_argv;
 static int main_argc;
 /** Signals handled after start as part of the event loop. */
-static ev_signal ev_sigs[4];
+static ev_signal ev_sigs[5];
 static const int ev_sig_count = sizeof(ev_sigs)/sizeof(*ev_sigs);
 
 static double start_time;
@@ -130,6 +130,15 @@ signal_cb(ev_loop *loop, struct ev_signal *w, int revents)
 	ev_break(loop, EVBREAK_ALL);
 }
 
+static void
+signal_sigwinch_cb(ev_loop *loop, struct ev_signal *w, int revents)
+{
+	(void) loop;
+	(void) w;
+	(void) revents;
+	rl_resize_terminal();
+}
+
 /** Try to log as much as possible before dumping a core.
  *
  * Core files are not aways allowed and it takes an effort to
@@ -210,6 +219,7 @@ signal_reset()
 	    sigaction(SIGINT, &sa, NULL) == -1 ||
 	    sigaction(SIGTERM, &sa, NULL) == -1 ||
 	    sigaction(SIGHUP, &sa, NULL) == -1 ||
+	    sigaction(SIGWINCH, &sa, NULL) == -1 ||
 	    sigaction(SIGSEGV, &sa, NULL) == -1 ||
 	    sigaction(SIGFPE, &sa, NULL) == -1)
 		say_syserror("sigaction");
@@ -260,6 +270,7 @@ signal_init(void)
 	ev_signal_init(&ev_sigs[1], signal_cb, SIGINT);
 	ev_signal_init(&ev_sigs[2], signal_cb, SIGTERM);
 	ev_signal_init(&ev_sigs[3], signal_cb, SIGHUP);
+	ev_signal_init(&ev_sigs[4], signal_sigwinch_cb, SIGWINCH);
 	for (int i = 0; i < ev_sig_count; i++)
 		ev_signal_start(loop(), &ev_sigs[i]);