Some new "barebones" for enhanced boot loader functions for the user menu

and the kernel/module loading.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4881 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kernel/boot/loader/loader.h

@@ -0,0 +1,17 @@
+/*
+** Copyright 2003, Axel Dörfler, [email protected]. All rights reserved.
+** Distributed under the terms of the OpenBeOS License.
+*/
+#ifndef LOADER_H
+#define LOADER_H
+
+
+#include <boot/vfs.h>
+
+
+extern bool is_bootable(Directory *volume);
+extern status_t load_kernel(stage2_args *args, Directory *volume);
+extern status_t load_modules(stage2_args *args, Directory *volume);
+extern void start_kernel();
+
+#endif	/* LOADER_H */

src/kernel/boot/loader/menu.cpp

@@ -0,0 +1,45 @@
+/*
+** Copyright 2003, Axel Dörfler, [email protected]. All rights reserved.
+** Distributed under the terms of the OpenBeOS License.
+*/
+
+
+#include "menu.h"
+#include "loader.h"
+
+#include <OS.h>
+
+#include <boot/stage2.h>
+#include <boot/vfs.h>
+#include <boot/platform.h>
+#include <boot/stdio.h>
+
+
+status_t
+user_menu(Directory **_bootVolume)
+{
+	int32 index = 1;
+	void *cookie;
+
+	if (gRoot->Open(&cookie, O_RDONLY) == B_OK) {
+		Directory *volume;
+		while (gRoot->GetNextNode(cookie, (Node **)&volume) == B_OK) {
+			// only list bootable volumes
+			if (!is_bootable(volume))
+				continue;
+
+			char name[B_FILE_NAME_LENGTH];
+			if (volume->GetName(name, sizeof(name)) == B_OK)
+				printf("%ld) /%s\n", index++, name);
+
+			// ToDo: for now, just choose the first volume as boot volume
+			if (*_bootVolume == NULL)
+				*_bootVolume = volume;
+		}
+		gRoot->Close(cookie);
+	}
+	puts("(it always tries to boot from the first for now...)");
+
+	return B_OK;
+}
+

src/kernel/boot/loader/menu.h

@@ -0,0 +1,14 @@
+/*
+** Copyright 2003, Axel Dörfler, [email protected]. All rights reserved.
+** Distributed under the terms of the OpenBeOS License.
+*/
+#ifndef MENU_H
+#define MENU_H
+
+
+#include <boot/vfs.h>
+
+
+extern status_t user_menu(Directory **_bootVolume);
+
+#endif	/* MENU_H */