From: Brian Brooks <brooks.brian@gmail.com>
Date: Sun, 18 Oct 2020 13:37:09 +0000 (-0500)
Subject: server/telnet: Handle Ctrl+K
X-Git-Tag: v0.11.0-rc1~96
X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=commitdiff_plain;h=9e2a0effb2b7b933db00543f1e6879541707a2f3

server/telnet: Handle Ctrl+K

Handle Ctrl+K shortcut which clears the line from the cursor position
to the end of line.

Change-Id: I2ecff5284473cef7c11cf9cb7e1c0c97d55f6c1c
Signed-off-by: Brian Brooks <brooks.brian@gmail.com>
Reviewed-on: http://openocd.zylin.com/5868
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: jenkins
Reviewed-by: Marc Schink <dev@zapb.de>
---

diff --git a/src/server/telnet_server.c b/src/server/telnet_server.c
index 0243c6328e..407ab68aef 100644
--- a/src/server/telnet_server.c
+++ b/src/server/telnet_server.c
@@ -538,7 +538,17 @@ static int telnet_input(struct connection *connection)
 							telnet_move_cursor(connection, 0);
 						else if (*buf_p == CTRL('E'))
 							telnet_move_cursor(connection, t_con->line_size);
-						else
+						else if (*buf_p == CTRL('K')) {         /* kill line to end */
+							if (t_con->line_cursor < t_con->line_size) {
+								/* overwrite with space, until end of line, move back */
+								for (size_t i = t_con->line_cursor; i < t_con->line_size; i++)
+									telnet_write(connection, " ", 1);
+								for (size_t i = t_con->line_cursor; i < t_con->line_size; i++)
+									telnet_write(connection, "\b", 1);
+								t_con->line[t_con->line_cursor] = '\0';
+								t_con->line_size = t_con->line_cursor;
+							}
+						} else
 							LOG_DEBUG("unhandled nonprintable: %2.2x", *buf_p);
 					}
 				}