Send secondary DA to terminals with XT in terminfo when starting up and

parse it to work out the xterm version.

cmd-server-info.c

@@ -88,12 +88,12 @@ cmd_server_info_exec(unused struct cmd *self, struct cmd_ctx *ctx)
 		if (c == NULL || c->session == NULL)
 			continue;
 
-		ctx->print(ctx,"%2d: %s (%d, %d): %s [%ux%u %s bs=%hho] "
+		ctx->print(ctx,"%2d: %s (%d, %d): %s [%ux%u %s bs=%hho "
-		    "[flags=0x%x/0x%x, references=%u]", i, c->tty.path,
+		    "xterm=%u] [flags=0x%x/0x%x, references=%u]", i,
-		    c->ibuf.fd, c->tty.fd, c->session->name,
+		    c->tty.path, c->ibuf.fd, c->tty.fd, c->session->name,
 		    c->tty.sx, c->tty.sy, c->tty.termname,
-		    c->tty.tio.c_cc[VERASE], c->flags,
+		    c->tty.tio.c_cc[VERASE], c->tty.xterm_version,
-		    c->tty.flags, c->references);
+		    c->flags, c->tty.flags, c->references);
 	}
 	ctx->print(ctx, "%s", "");
 

tmux.h

@@ -1013,6 +1013,7 @@ LIST_HEAD(tty_terms, tty_term);
 
 struct tty {
 	char		*path;
+	u_int		 xterm_version;
 
 	u_int		 sx;
 	u_int		 sy;

tty-keys.c

@@ -19,6 +19,8 @@
 #include <sys/types.h>
 #include <sys/time.h>
 
+#include <limits.h>
+#include <stdlib.h>
 #include <string.h>
 #include <termios.h>
 #include <unistd.h>
@@ -40,6 +42,7 @@ struct tty_key *tty_keys_find(struct tty *, const char *, size_t, size_t *);
 void		tty_keys_callback(int, short, void *);
 int		tty_keys_mouse(struct tty *,
 		    const char *, size_t, size_t *, struct mouse_event *);
+int		tty_keys_device(struct tty *, const char *, size_t, size_t *);
 
 struct tty_key_ent {
 	enum tty_code_code	code;
@@ -461,6 +464,19 @@ tty_keys_next(struct tty *tty)
 		goto handle_key;
 	}
 
+	/* Is this device attributes response? */
+	switch (tty_keys_device(tty, buf, len, &size)) {
+	case 0:		/* yes */
+		evbuffer_drain(tty->event->input, size);
+		key = KEYC_NONE;
+		goto handle_key;
+	case -1:	/* no, or not valid */
+		break;
+	case 1:		/* partial */
+		goto partial_key;
+	}
+
+
 	/* Is this a mouse key press? */
 	switch (tty_keys_mouse(tty, buf, len, &size, &mouse)) {
 	case 0:		/* yes */
@@ -559,6 +575,7 @@ found_key:
 handle_key:
 	evtimer_del(&tty->key_timer);
 
+	if (key != KEYC_NONE)
 		tty->key_callback(key, &mouse, tty->key_data);
 
 	tty->flags &= ~TTY_ESCAPE;
@@ -655,3 +672,62 @@ tty_keys_mouse(struct tty *tty,
 	log_debug("mouse position: x=%u y=%u b=%u", m->x, m->y, m->b);
 	return (0);
 }
+
+/*
+ * Handle device attributes input. Returns 0 for success, -1 for failure, 1 for
+ * partial.
+ */
+int
+tty_keys_device(struct tty *tty, const char *buf, size_t len, size_t *size)
+{
+	u_int i, a, b;
+	char  tmp[64], *endptr;
+
+	/*
+	 * Secondary device attributes are \033[>a;b;c. We only request
+	 * attributes on xterm, so we only care about the middle values which
+	 * is the xterm version.
+	 */
+
+	*size = 0;
+
+	/* First three bytes are always \033[>. */
+	if (buf[0] != '\033')
+		return (-1);
+	if (len == 1)
+		return (1);
+	if (buf[1] != '[')
+		return (-1);
+	if (len == 2)
+		return (1);
+	if (buf[2] != '>')
+		return (-1);
+	if (len == 3)
+		return (1);
+
+	/* Copy the rest up to a 'c'. */
+	for (i = 0; i < (sizeof tmp) - 1 && buf[3 + i] != 'c'; i++) {
+		if (3 + i == len)
+			return (1);
+		tmp[i] = buf[3 + i];
+	}
+	if (i == (sizeof tmp) - 1)
+		return (-1);
+	tmp[i] = '\0';
+	*size = 4 + i;
+
+	/* Convert version numbers. */
+	a = strtoul(tmp, &endptr, 10);
+	if (*endptr == ';') {
+		b = strtoul(endptr + 1, &endptr, 10);
+		if (*endptr != '\0' && *endptr != ';')
+			b = 0;
+	} else
+		a = b = 0;
+
+	log_debug("received xterm version %u", b);
+	if (tty->xterm_version == 0)
+		tty->xterm_version = b;
+
+	return (0);
+}

tty.c

@@ -211,6 +211,9 @@ tty_start_tty(struct tty *tty)
 	if (tty_term_has(tty->term, TTYC_KMOUS))
 		tty_puts(tty, "\033[?1000l");
 
+	if (tty_term_has(tty->term, TTYC_XT))
+		tty_puts(tty, "\033[>c");
+
 	tty->cx = UINT_MAX;
 	tty->cy = UINT_MAX;