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/*
* Copyright (C) 2011 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
/** @file
*
* Prompt for keypress
*
*/
#include <errno.h>
#include <stdio.h>
#include <ipxe/console.h>
#include <ipxe/timer.h>
#include <usr/prompt.h>
/**
* Prompt for keypress
*
* @v text Prompt string
* @v wait_ms Time to wait, in milliseconds (0=indefinite)
* @v key Key to wait for (0=any key)
* @ret rc Return status code
*
* Returns success if the specified key was pressed within the
* specified timeout period.
*/
int prompt ( const char *text, unsigned int wait_ms, int key ) {
int key_pressed;
/* Display prompt */
printf ( "%s", text );
/* Wait for key */
key_pressed = getkey ( ( wait_ms * TICKS_PER_SEC ) / 1000 );
/* Clear the prompt line */
while ( *(text++) )
printf ( "\b \b" );
/* Check for timeout */
if ( key_pressed < 0 )
return -ETIMEDOUT;
/* Check for correct key pressed */
if ( key && ( key_pressed != key ) )
return -ECANCELED;
return 0;
}
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