Pass window titles through vis(1). <0x20 is dropped anyway by the input state

machine but top-bit-set nonprintables could cause trouble, and they are neater
like this anyway.

Suggested by deraadt a few days ago.

2 files changed, 7 insertions, 2 deletions

diff --git a/input.c b/input.c
index 9483bae1..35ae4164 100644
--- a/input.c
+++ b/input.c
@@ -475,7 +475,7 @@ input_state_string_next(u_char ch, struct input_ctx *ictx)
 		return;
 	}
 
-	if (ch >= 0x20 && ch != 0x7f) {
+	if (ch >= 0x20) {
 		if (input_add_string(ictx, ch) != 0)
 			input_state(ictx, input_state_first);
 		return;
diff --git a/screen.c b/screen.c
index 4b355115..53b17bce 100644
--- a/screen.c
+++ b/screen.c
@@ -19,6 +19,7 @@
 #include <sys/types.h>
 
 #include <string.h>
+#include <vis.h>
 
 #include "tmux.h"
 
@@ -65,8 +66,12 @@ screen_free(struct screen *s)
 void
 screen_set_title(struct screen *s, const char *title)
 {
+	char	tmp[BUFSIZ];
+
+	strnvis(tmp, title, sizeof tmp, VIS_OCTAL|VIS_TAB|VIS_NL);
+
 	xfree(s->title);
-	s->title = xstrdup(title);
+	s->title = xstrdup(tmp);
 }
 
 /* Resize screen. */