kf* terminfo capabilities are poorly defined and rxvt uses them in a

different way from xterm, so add a feature flag for rxvt to make tmux
ignore the capabilities and instead rely on its builtin definitions.

options-table.c

@@ -363,7 +363,8 @@ const struct options_table_entry options_table[] = {
 	  .scope = OPTIONS_TABLE_SERVER,
 	  .flags = OPTIONS_TABLE_IS_ARRAY,
 	  .default_str = "xterm*:clipboard:ccolour:cstyle:focus:title,"
-			 "screen*:title",
+			 "screen*:title,"
+	                 "rxvt*:ignorefkeys",
 	  .separator = ",",
 	  .text = "List of terminal features, used if they cannot be "
 		  "automatically detected."

tmux.1

@@ -3656,6 +3656,12 @@ Allows setting the cursor style.
 Supports extended keys.
 .It focus
 Supports focus reporting.
+.It ignorefkeys
+Ignore function keys from
+.Xr terminfo 5
+and use the
+.Nm
+internal set only.
 .It margins
 Supports DECSLRM margins.
 .It mouse

tty-features.c

@@ -250,6 +250,80 @@ static const struct tty_feature tty_feature_rectfill = {
 	TERM_DECFRA
 };
 
+/* Use builtin function keys only. */
+static const char *tty_feature_ignorefkeys_capabilities[] = {
+	"kf0@",
+	"kf1@",
+	"kf2@",
+	"kf3@",
+	"kf4@",
+	"kf5@",
+	"kf6@",
+	"kf7@",
+	"kf8@",
+	"kf9@",
+	"kf10@",
+	"kf11@",
+	"kf12@",
+	"kf13@",
+	"kf14@",
+	"kf15@",
+	"kf16@",
+	"kf17@",
+	"kf18@",
+	"kf19@",
+	"kf20@",
+	"kf21@",
+	"kf22@",
+	"kf23@",
+	"kf24@",
+	"kf25@",
+	"kf26@",
+	"kf27@",
+	"kf28@",
+	"kf29@",
+	"kf30@",
+	"kf31@",
+	"kf32@",
+	"kf33@",
+	"kf34@",
+	"kf35@",
+	"kf36@",
+	"kf37@",
+	"kf38@",
+	"kf39@",
+	"kf40@",
+	"kf41@",
+	"kf42@",
+	"kf43@",
+	"kf44@",
+	"kf45@",
+	"kf46@",
+	"kf47@",
+	"kf48@",
+	"kf49@",
+	"kf50@",
+	"kf51@",
+	"kf52@",
+	"kf53@",
+	"kf54@",
+	"kf55@",
+	"kf56@",
+	"kf57@",
+	"kf58@",
+	"kf59@",
+	"kf60@",
+	"kf61@",
+	"kf62@",
+	"kf63@",
+	NULL
+};
+static const struct tty_feature tty_feature_ignorefkeys = {
+	"ignorefkeys",
+	tty_feature_ignorefkeys_capabilities,
+	0
+};
+
 /* Available terminal features. */
 static const struct tty_feature *tty_features[] = {
 	&tty_feature_256,
@@ -259,6 +333,7 @@ static const struct tty_feature *tty_features[] = {
 	&tty_feature_cstyle,
 	&tty_feature_extkeys,
 	&tty_feature_focus,
+	&tty_feature_ignorefkeys,
 	&tty_feature_margins,
 	&tty_feature_mouse,
 	&tty_feature_osc7,
@@ -372,7 +447,7 @@ tty_default_features(int *feat, const char *name, u_int version)
 			      ",ccolour,cstyle,focus,overline,usstyle"
 		},
 		{ .name = "rxvt-unicode",
-		  .features = "256,bpaste,ccolour,cstyle,mouse,title"
+		  .features = "256,bpaste,ccolour,cstyle,mouse,title,ignorefkeys"
 		},
 		{ .name = "iTerm2",
 		  .features = TTY_FEATURES_BASE_MODERN_XTERM

tty-keys.c

@@ -126,7 +126,7 @@ static const struct tty_default_key_raw tty_default_raw_keys[] = {
 	{ "\033\033[C", KEYC_RIGHT|KEYC_CURSOR|KEYC_META },
 	{ "\033\033[D", KEYC_LEFT|KEYC_CURSOR|KEYC_META },
 
-	/* Other (xterm) "cursor" keys. */
+	/* Other xterm keys. */
 	{ "\033OH", KEYC_HOME },
 	{ "\033OF", KEYC_END },
 
@@ -139,7 +139,7 @@ static const struct tty_default_key_raw tty_default_raw_keys[] = {
 	{ "\033\033[H", KEYC_HOME|KEYC_META|KEYC_IMPLIED_META },
 	{ "\033\033[F", KEYC_END|KEYC_META|KEYC_IMPLIED_META },
 
-	/* rxvt-style arrow + modifier keys. */
+	/* rxvt arrow keys. */
 	{ "\033Oa", KEYC_UP|KEYC_CTRL },
 	{ "\033Ob", KEYC_DOWN|KEYC_CTRL },
 	{ "\033Oc", KEYC_RIGHT|KEYC_CTRL },
@@ -150,7 +150,31 @@ static const struct tty_default_key_raw tty_default_raw_keys[] = {
 	{ "\033[c", KEYC_RIGHT|KEYC_SHIFT },
 	{ "\033[d", KEYC_LEFT|KEYC_SHIFT },
 
-	/* rxvt-style function + modifier keys (C = ^, S = $, C-S = @). */
+	/* rxvt function keys. */
+	{ "\033[11~", KEYC_F1 },
+	{ "\033[12~", KEYC_F2 },
+	{ "\033[13~", KEYC_F3 },
+	{ "\033[14~", KEYC_F4 },
+	{ "\033[15~", KEYC_F5 },
+	{ "\033[17~", KEYC_F6 },
+	{ "\033[18~", KEYC_F7 },
+	{ "\033[19~", KEYC_F8 },
+	{ "\033[20~", KEYC_F9 },
+	{ "\033[21~", KEYC_F10 },
+
+	{ "\033[23~", KEYC_F1|KEYC_SHIFT },
+	{ "\033[24~", KEYC_F2|KEYC_SHIFT },
+	{ "\033[25~", KEYC_F3|KEYC_SHIFT },
+	{ "\033[26~", KEYC_F4|KEYC_SHIFT },
+	{ "\033[28~", KEYC_F5|KEYC_SHIFT },
+	{ "\033[29~", KEYC_F6|KEYC_SHIFT },
+	{ "\033[31~", KEYC_F7|KEYC_SHIFT },
+	{ "\033[32~", KEYC_F8|KEYC_SHIFT },
+	{ "\033[33~", KEYC_F9|KEYC_SHIFT },
+	{ "\033[34~", KEYC_F10|KEYC_SHIFT },
+	{ "\033[23$", KEYC_F11|KEYC_SHIFT },
+	{ "\033[24$", KEYC_F12|KEYC_SHIFT },
+
 	{ "\033[11^", KEYC_F1|KEYC_CTRL },
 	{ "\033[12^", KEYC_F2|KEYC_CTRL },
 	{ "\033[13^", KEYC_F3|KEYC_CTRL },
@@ -163,31 +187,6 @@ static const struct tty_default_key_raw tty_default_raw_keys[] = {
 	{ "\033[21^", KEYC_F10|KEYC_CTRL },
 	{ "\033[23^", KEYC_F11|KEYC_CTRL },
 	{ "\033[24^", KEYC_F12|KEYC_CTRL },
-	{ "\033[2^", KEYC_IC|KEYC_CTRL },
-	{ "\033[3^", KEYC_DC|KEYC_CTRL },
-	{ "\033[7^", KEYC_HOME|KEYC_CTRL },
-	{ "\033[8^", KEYC_END|KEYC_CTRL },
-	{ "\033[6^", KEYC_NPAGE|KEYC_CTRL },
-	{ "\033[5^", KEYC_PPAGE|KEYC_CTRL },
-
-	{ "\033[11$", KEYC_F1|KEYC_SHIFT },
-	{ "\033[12$", KEYC_F2|KEYC_SHIFT },
-	{ "\033[13$", KEYC_F3|KEYC_SHIFT },
-	{ "\033[14$", KEYC_F4|KEYC_SHIFT },
-	{ "\033[15$", KEYC_F5|KEYC_SHIFT },
-	{ "\033[17$", KEYC_F6|KEYC_SHIFT },
-	{ "\033[18$", KEYC_F7|KEYC_SHIFT },
-	{ "\033[19$", KEYC_F8|KEYC_SHIFT },
-	{ "\033[20$", KEYC_F9|KEYC_SHIFT },
-	{ "\033[21$", KEYC_F10|KEYC_SHIFT },
-	{ "\033[23$", KEYC_F11|KEYC_SHIFT },
-	{ "\033[24$", KEYC_F12|KEYC_SHIFT },
-	{ "\033[2$", KEYC_IC|KEYC_SHIFT },
-	{ "\033[3$", KEYC_DC|KEYC_SHIFT },
-	{ "\033[7$", KEYC_HOME|KEYC_SHIFT },
-	{ "\033[8$", KEYC_END|KEYC_SHIFT },
-	{ "\033[6$", KEYC_NPAGE|KEYC_SHIFT },
-	{ "\033[5$", KEYC_PPAGE|KEYC_SHIFT },
 
 	{ "\033[11@", KEYC_F1|KEYC_CTRL|KEYC_SHIFT },
 	{ "\033[12@", KEYC_F2|KEYC_CTRL|KEYC_SHIFT },
@@ -201,12 +200,6 @@ static const struct tty_default_key_raw tty_default_raw_keys[] = {
 	{ "\033[21@", KEYC_F10|KEYC_CTRL|KEYC_SHIFT },
 	{ "\033[23@", KEYC_F11|KEYC_CTRL|KEYC_SHIFT },
 	{ "\033[24@", KEYC_F12|KEYC_CTRL|KEYC_SHIFT },
-	{ "\033[2@", KEYC_IC|KEYC_CTRL|KEYC_SHIFT },
-	{ "\033[3@", KEYC_DC|KEYC_CTRL|KEYC_SHIFT },
-	{ "\033[7@", KEYC_HOME|KEYC_CTRL|KEYC_SHIFT },
-	{ "\033[8@", KEYC_END|KEYC_CTRL|KEYC_SHIFT },
-	{ "\033[6@", KEYC_NPAGE|KEYC_CTRL|KEYC_SHIFT },
-	{ "\033[5@", KEYC_PPAGE|KEYC_CTRL|KEYC_SHIFT },
 
 	/* Focus tracking. */
 	{ "\033[I", KEYC_FOCUS_IN },