Sync OpenBSD patchset 1004:

Add a -R flag to send-keys to reset the terminal. Written ages ago and
Suggested by someone, I forget who.

cmd-send-keys.c

@@ -19,6 +19,7 @@
 #include <sys/types.h>
 
 #include <stdlib.h>
+#include <string.h>
 
 #include "tmux.h"
 
@@ -30,8 +31,8 @@ int	cmd_send_keys_exec(struct cmd *, struct cmd_ctx *);
 
 const struct cmd_entry cmd_send_keys_entry = {
 	"send-keys", "send",
-	"t:", 0, -1,
-	"[-t target-pane] key ...",
+	"Rt:", 0, -1,
+	"[-R] [-t target-pane] key ...",
 	0,
 	NULL,
 	NULL,
@@ -44,12 +45,29 @@ cmd_send_keys_exec(struct cmd *self, struct cmd_ctx *ctx)
 	struct args		*args = self->args;
 	struct window_pane	*wp;
 	struct session		*s;
+	struct input_ctx	*ictx;
 	const char		*str;
 	int			 i, key;
 
 	if (cmd_find_pane(ctx, args_get(args, 't'), &s, &wp) == NULL)
 		return (-1);
 
+	if (args_has(args, 'R')) {
+		ictx = &wp->ictx;
+
+		memcpy(&ictx->cell, &grid_default_cell, sizeof ictx->cell);
+		memcpy(&ictx->old_cell, &ictx->cell, sizeof ictx->old_cell);
+		ictx->old_cx = 0;
+		ictx->old_cy = 0;
+
+		if (wp->mode == NULL)
+			screen_write_start(&ictx->ctx, wp, &wp->base);
+		else
+			screen_write_start(&ictx->ctx, NULL, &wp->base);
+		screen_write_reset(&ictx->ctx);
+		screen_write_stop(&ictx->ctx);
+	}
+
 	for (i = 0; i < args->argc; i++) {
 		str = args->argv[i];
 

input.c

@@ -978,17 +978,7 @@ input_esc_dispatch(struct input_ctx *ictx)
 		ictx->old_cx = 0;
 		ictx->old_cy = 0;
 
-		screen_reset_tabs(sctx->s);
-
-		screen_write_scrollregion(sctx, 0, screen_size_y(sctx->s) - 1);
-
-		screen_write_insertmode(sctx, 0);
-		screen_write_kcursormode(sctx, 0);
-		screen_write_kkeypadmode(sctx, 0);
-		screen_write_mousemode_off(sctx);
-
-		screen_write_clearscreen(sctx);
-		screen_write_cursormove(sctx, 0, 0);
+		screen_write_reset(sctx->s);
 		break;
 	case INPUT_ESC_IND:
 		screen_write_linefeed(sctx, 0);

screen-write.c

@@ -46,6 +46,24 @@ screen_write_stop(unused struct screen_write_ctx *ctx)
 {
 }
 
+
+/* Reset screen state. */
+void
+screen_write_reset(struct screen_write_ctx *ctx)
+{
+	screen_reset_tabs(ctx->s);
+
+	screen_write_scrollregion(ctx, 0, screen_size_y(ctx->s) - 1);
+
+	screen_write_insertmode(ctx, 0);
+	screen_write_kcursormode(ctx, 0);
+	screen_write_kkeypadmode(ctx, 0);
+	screen_write_mousemode_off(ctx);
+
+	screen_write_clearscreen(ctx);
+	screen_write_cursormove(ctx, 0, 0);
+}
+
 /* Write character. */
 void
 screen_write_putc(

tmux.1

@@ -1638,6 +1638,7 @@ are listed; this may be one of:
 or
 .Em emacs-copy .
 .It Xo Ic send-keys
+.Fl R
 .Op Fl t Ar target-pane
 .Ar key Ar ...
 .Xc
@@ -1652,6 +1653,9 @@ or
 ) to send; if the string is not recognised as a key, it is sent as a series of
 characters.
 All arguments are sent sequentially from first to last.
+The
+.Fl R
+flag causes the terminal state to be reset.
 .It Ic send-prefix Op Fl t Ar target-pane
 Send the prefix key to a window as if it was pressed.
 If multiple prefix keys are configured, only the first is sent.

tmux.h

@@ -1828,6 +1828,7 @@ char	*grid_view_string_cells(struct grid *, u_int, u_int, u_int);
 void	 screen_write_start(
 	     struct screen_write_ctx *, struct window_pane *, struct screen *);
 void	 screen_write_stop(struct screen_write_ctx *);
+void	 screen_write_reset(struct screen_write_ctx *);
 size_t printflike2 screen_write_cstrlen(int, const char *, ...);
 void printflike5 screen_write_cnputs(struct screen_write_ctx *,
 	     ssize_t, struct grid_cell *, int, const char *, ...);