server/telnet: support 'CTRL+C'

like in terminal 'CTRL+C':
 - keeps the line content so the user can refer to it (like copy/paste)
 - marks the line with '^C', as hint that the command was not executed
 - permit the user to write a new command

Change-Id: Ib784c827d64fdc439a35db461d8387a62d3bfbbf
Signed-off-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/6439
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: jenkins
This commit is contained in:
Tarek BOCHKATI 2021-08-17 13:29:56 +01:00 committed by Antonio Borneo
parent efe944dfc9
commit 70cd395f3f
1 changed files with 7 additions and 0 deletions

View File

@ -718,6 +718,13 @@ static int telnet_input(struct connection *connection)
t_con->line_cursor--; t_con->line_cursor--;
} }
t_con->state = TELNET_STATE_DATA; t_con->state = TELNET_STATE_DATA;
} else if (*buf_p == CTRL('C')) { /* interrupt */
/* print '^C' at line end, and display a new command prompt */
telnet_move_cursor(connection, t_con->line_size);
telnet_write(connection, "^C\n\r", 4);
t_con->line_cursor = 0;
t_con->line_size = 0;
telnet_prompt(connection);
} else if (*buf_p == CTRL('F')) { /* cursor right */ } else if (*buf_p == CTRL('F')) { /* cursor right */
if (t_con->line_cursor < t_con->line_size) if (t_con->line_cursor < t_con->line_size)
telnet_write(connection, t_con->line + t_con->line_cursor++, 1); telnet_write(connection, t_con->line + t_con->line_cursor++, 1);