Do not create a buffer from an OSC 52 response if we have not sent a

query.

4 files changed, 39 insertions, 7 deletions

diff --git a/usr.bin/tmux/cmd-refresh-client.c b/usr.bin/tmux/cmd-refresh-client.c
index dada29cc8aa..696d5717e26 100644
--- a/usr.bin/tmux/cmd-refresh-client.c
+++ b/usr.bin/tmux/cmd-refresh-client.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-refresh-client.c,v 1.45 2021/08/27 17:15:57 nicm Exp $ */
+/* $OpenBSD: cmd-refresh-client.c,v 1.46 2022/02/15 13:03:02 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -225,7 +225,7 @@ cmd_refresh_client_exec(struct cmd *self, struct cmdq_item *item)
 	}
 
 	if (args_has(args, 'l')) {
-		tty_putcode_ptr2(&tc->tty, TTYC_MS, "", "?");
+		tty_send_osc52_query(&tc->tty);
 		return (CMD_RETURN_NORMAL);
 	}
 
diff --git a/usr.bin/tmux/tmux.h b/usr.bin/tmux/tmux.h
index 618d530a7d2..98887d1b1aa 100644
--- a/usr.bin/tmux/tmux.h
+++ b/usr.bin/tmux/tmux.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: tmux.h,v 1.1158 2022/02/01 14:46:42 nicm Exp $ */
+/* $OpenBSD: tmux.h,v 1.1159 2022/02/15 13:03:02 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1277,6 +1277,7 @@ LIST_HEAD(tty_terms, tty_term);
 struct tty {
 	struct client	*client;
 	struct event	 start_timer;
+	struct event	 query_timer;
 
 	u_int		 sx;
 	u_int		 sy;
@@ -1320,7 +1321,7 @@ struct tty {
 #define TTY_NOBLOCK 0x8
 #define TTY_STARTED 0x10
 #define TTY_OPENED 0x20
-/* 0x40 unused */
+#define TTY_OSC52QUERY 0x40
 #define TTY_BLOCK 0x80
 #define TTY_HAVEDA 0x100
 #define TTY_HAVEXDA 0x200
@@ -2173,6 +2174,7 @@ void	tty_reset(struct tty *);
 void	tty_region_off(struct tty *);
 void	tty_margin_off(struct tty *);
 void	tty_cursor(struct tty *, u_int, u_int);
+void	tty_send_osc52_query(struct tty *);
 void	tty_putcode(struct tty *, enum tty_code_code);
 void	tty_putcode1(struct tty *, enum tty_code_code, int);
 void	tty_putcode2(struct tty *, enum tty_code_code, int, int);
diff --git a/usr.bin/tmux/tty-keys.c b/usr.bin/tmux/tty-keys.c
index f01ab9a2407..9519b2ab16a 100644
--- a/usr.bin/tmux/tty-keys.c
+++ b/usr.bin/tmux/tty-keys.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: tty-keys.c,v 1.151 2021/10/21 08:36:51 nicm Exp $ */
+/* $OpenBSD: tty-keys.c,v 1.152 2022/02/15 13:03:02 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1217,6 +1217,11 @@ tty_keys_clipboard(__unused struct tty *tty, const char *buf, size_t len,
 	buf++;
 	end--;
 
+	/* If we did not request this, ignore it. */
+	if (~tty->flags & TTY_OSC52QUERY)
+		return (0);
+	tty->flags &= ~TTY_OSC52QUERY;
+
 	/* It has to be a string so copy it. */
 	copy = xmalloc(end + 1);
 	memcpy(copy, buf, end);
diff --git a/usr.bin/tmux/tty.c b/usr.bin/tmux/tty.c
index 63274052d00..253fc10e562 100644
--- a/usr.bin/tmux/tty.c
+++ b/usr.bin/tmux/tty.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: tty.c,v 1.415 2021/12/31 11:35:49 nicm Exp $ */
+/* $OpenBSD: tty.c,v 1.416 2022/02/15 13:03:02 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -83,6 +83,8 @@ static void	tty_check_overlay_range(struct tty *, u_int, u_int, u_int,
 #define TTY_BLOCK_START(tty) (1 + ((tty)->sx * (tty)->sy) * 8)
 #define TTY_BLOCK_STOP(tty) (1 + ((tty)->sx * (tty)->sy) / 8)
 
+#define TTY_QUERY_TIMEOUT 5
+
 void
 tty_create_log(void)
 {
@@ -307,7 +309,7 @@ tty_start_tty(struct tty *tty)
 {
 	struct client	*c = tty->client;
 	struct termios	 tio;
-	struct timeval	 tv = { .tv_sec = 3 };
+	struct timeval	 tv = { .tv_sec = TTY_QUERY_TIMEOUT };
 
 	setblocking(c->fd, 0);
 	event_add(&tty->event_in, NULL);
@@ -2917,3 +2919,26 @@ tty_default_attributes(struct tty *tty, const struct grid_cell *defaults,
 	gc.bg = bg;
 	tty_attributes(tty, &gc, defaults, palette);
 }
+
+static void
+tty_query_timer_callback(__unused int fd, __unused short events, void *data)
+{
+	struct tty	*tty = data;
+
+	tty->flags &= ~TTY_OSC52QUERY;
+}
+
+void
+tty_send_osc52_query(struct tty *tty)
+{
+	struct timeval	 tv = { .tv_sec = TTY_QUERY_TIMEOUT };
+
+	if ((~tty->flags & TTY_STARTED) || (tty->flags & TTY_OSC52QUERY))
+		return;
+	tty_putcode_ptr2(tty, TTYC_MS, "", "?");
+	tty->flags |= TTY_OSC52QUERY;
+
+	evtimer_set(&tty->query_timer, tty_query_timer_callback, tty);
+	evtimer_add(&tty->query_timer, &tv);
+}
+