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author | Michael Brown | 2011-03-07 18:42:06 +0100 |
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committer | Michael Brown | 2011-03-07 20:53:53 +0100 |
commit | c4b6c244b0cc0380451c6f087e8d009f3f490926 (patch) | |
tree | 2bc13ef8ef452691ace42742f6efd787d4895718 /src/usr/prompt.c | |
parent | [console] Add a timeout parameter to getkey() (diff) | |
download | ipxe-c4b6c244b0cc0380451c6f087e8d009f3f490926.tar.gz ipxe-c4b6c244b0cc0380451c6f087e8d009f3f490926.tar.xz ipxe-c4b6c244b0cc0380451c6f087e8d009f3f490926.zip |
[prompt] Replace shell_banner() with a generic prompt() function
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/usr/prompt.c')
-rw-r--r-- | src/usr/prompt.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/src/usr/prompt.c b/src/usr/prompt.c new file mode 100644 index 00000000..7f9a9448 --- /dev/null +++ b/src/usr/prompt.c @@ -0,0 +1,66 @@ +/* + * 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 <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; +} |