Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / usr / prompt.c

diff --git a/qemu/roms/ipxe/src/usr/prompt.c b/qemu/roms/ipxe/src/usr/prompt.c
new file mode 100644 (file)
index 0000000..957b4ab
--- /dev/null
+++ b/qemu/roms/ipxe/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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+/** @file
+ *
+ * Prompt for keypress
+ *
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <ipxe/console.h>
+#include <usr/prompt.h>
+
+/**
+ * Prompt for keypress
+ *
+ * @v text             Prompt string
+ * @v timeout          Timeout period, in ticks (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 long timeout, int key ) {
+       int key_pressed;
+
+       /* Display prompt */
+       printf ( "%s", text );
+
+       /* Wait for key */
+       key_pressed = getkey ( timeout );
+
+       /* 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;
+}