From 553d4cba794b4f81dd42ba139f8dfb54fcd13c16 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Wed, 10 Apr 2024 07:36:25 +0000
Subject: Add an option allow-set-title to forbid applications from changing
 the pane title, from someone in GitHub issue 3930.

---
 input.c         | 4 +++-
 options-table.c | 8 ++++++++
 tmux.1          | 6 ++++++
 tmux.h          | 2 +-
 4 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/input.c b/input.c
index b833b50e..2ae4b89a 100644
--- a/input.c
+++ b/input.c
@@ -2341,7 +2341,9 @@ input_exit_osc(struct input_ctx *ictx)
 	switch (option) {
 	case 0:
 	case 2:
-		if (screen_set_title(sctx->s, p) && wp != NULL) {
+		if (wp != NULL &&
+		    options_get_number(wp->options, "allow-set-title") &&
+		    screen_set_title(sctx->s, p)) {
 			notify_pane("pane-title-changed", wp);
 			server_redraw_window_borders(wp->window);
 			server_status_window(wp->window);
diff --git a/options-table.c b/options-table.c
index 8187ad08..fe460473 100644
--- a/options-table.c
+++ b/options-table.c
@@ -876,6 +876,14 @@ const struct options_table_entry options_table[] = {
 		  "to rename windows."
 	},
 
+	{ .name = "allow-set-title",
+	  .type = OPTIONS_TABLE_FLAG,
+	  .scope = OPTIONS_TABLE_WINDOW|OPTIONS_TABLE_PANE,
+	  .default_num = 1,
+	  .text = "Whether applications are allowed to use the escape sequence "
+		  "to set the pane title."
+	},
+
 	{ .name = "alternate-screen",
 	  .type = OPTIONS_TABLE_FLAG,
 	  .scope = OPTIONS_TABLE_WINDOW|OPTIONS_TABLE_PANE,
diff --git a/tmux.1 b/tmux.1
index 186ffee0..a5102216 100644
--- a/tmux.1
+++ b/tmux.1
@@ -4750,6 +4750,12 @@ they will be allowed even if the pane is invisible.
 Allow programs in the pane to change the window name using a terminal escape
 sequence (\eek...\ee\e\e).
 .Pp
+.It Xo Ic allow-set-title
+.Op Ic on | off
+.Xc
+Allow programs in the pane to change the title using the terminal escape
+sequences (\ee]2;...\ee\e\e or \ee]0;...\ee\e\e).
+.Pp
 .It Xo Ic alternate-screen
 .Op Ic on | off
 .Xc
diff --git a/tmux.h b/tmux.h
index f61d1032..469d7f1c 100644
--- a/tmux.h
+++ b/tmux.h
@@ -850,7 +850,7 @@ struct screen_sel;
 struct screen_titles;
 struct screen {
 	char				*title;
-	char				*path;
+	char *path;
 	struct screen_titles		*titles;
 
 	struct grid			*grid;	  /* grid data */
-- 
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