[lan78xx] Always enable automatic speed and duplex detection
[ipxe.git] / src / usr / prompt.c
1 /*
2 * Copyright (C) 2011 Michael Brown <mbrown@fensystems.co.uk>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA.
18 *
19 * You can also choose to distribute this program under the terms of
20 * the Unmodified Binary Distribution Licence (as given in the file
21 * COPYING.UBDL), provided that you have satisfied its requirements.
22 */
23
24 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
25
26 /** @file
27 *
28 * Prompt for keypress
29 *
30 */
31
32 #include <errno.h>
33 #include <stdio.h>
34 #include <ipxe/console.h>
35 #include <usr/prompt.h>
36
37 /**
38 * Prompt for keypress
39 *
40 * @v text Prompt string
41 * @v timeout Timeout period, in ticks (0=indefinite)
42 * @v key Key to wait for (0=any key)
43 * @ret rc Return status code
44 *
45 * Returns success if the specified key was pressed within the
46 * specified timeout period.
47 */
48 int prompt ( const char *text, unsigned long timeout, int key ) {
49 int key_pressed;
50
51 /* Display prompt */
52 printf ( "%s", text );
53
54 /* Wait for key */
55 key_pressed = getkey ( timeout );
56
57 /* Clear the prompt line */
58 while ( *(text++) )
59 printf ( "\b \b" );
60
61 /* Check for timeout */
62 if ( key_pressed < 0 )
63 return -ETIMEDOUT;
64
65 /* Check for correct key pressed */
66 if ( key && ( key_pressed != key ) )
67 return -ECANCELED;
68
69 return 0;
70 }