telnet: fix strage blank spaces at beginning of telnet lines

[fw/openocd] / src / server / telnet_server.c

diff --git a/src/server/telnet_server.c b/src/server/telnet_server.c
index 6f26f0ac3ca29fee55a276ade1e5cec26809c15b..94c89431b977faf5e466e82955688d61b8f554cd 100644 (file)
--- a/src/server/telnet_server.c
+++ b/src/server/telnet_server.c
@@ -62,7 +62,6 @@ int telnet_prompt(struct connection *connection)
 {
        struct telnet_connection *t_con = connection->priv;
 
-       telnet_write(connection, "\r", 1); /* the prompt is always placed at the line beginning */
        return telnet_write(connection, t_con->prompt, strlen(t_con->prompt));
 }
 
@@ -116,10 +115,12 @@ void telnet_log_callback(void *priv, const char *file, unsigned line,
        }
 
        /* clear the command line */
-       telnet_write(connection, "\r", 1);
+       for (i = strlen(t_con->prompt) + t_con->line_size; i > 0; i -= 16)
+               telnet_write(connection, "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b", i > 16 ? 16 : i);
        for (i = strlen(t_con->prompt) + t_con->line_size; i > 0; i -= 16)
                telnet_write(connection, "                ", i > 16 ? 16 : i);
-       telnet_write(connection, "\r", 1);
+       for (i = strlen(t_con->prompt) + t_con->line_size; i > 0; i -= 16)
+               telnet_write(connection, "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b", i > 16 ? 16 : i);
 
        /* output the message */
        telnet_outputline(connection, string);
@@ -160,6 +161,7 @@ int telnet_new_connection(struct connection *connection)
                telnet_write(connection, "\r\n", 2);
        }
 
+       telnet_write(connection, "\r", 1); /* the prompt is always placed at the line beginning */
        telnet_prompt(connection);
 
        /* initialize history */
@@ -331,6 +333,7 @@ int telnet_input(struct connection *connection)
                                                        if (retval == ERROR_COMMAND_CLOSE_CONNECTION)
                                                                return ERROR_SERVER_REMOTE_CLOSED;
 
+                                                       telnet_write(connection, "\r", 1); /* the prompt is always placed at the line beginning */
                                                        retval = telnet_prompt(connection);
                                                        if (retval == ERROR_SERVER_REMOTE_CLOSED)
                                                                return ERROR_SERVER_REMOTE_CLOSED;