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diff --git a/include/glibtop/disk.h b/include/glibtop/disk.h
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+/* Copyright (C) 1998-99 Martin Baulig
+ This file is part of LibGTop 1.0.
+
+ Contributed by James Dominic P. Guana <guana.histark@gmail.com>, May 2020.
+
+ LibGTop 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 (at your option) any later version.
+
+ LibGTop 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 LibGTop; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+*/
+
+#ifndef __GLIBTOP_DISK_H__
+#define __GLIBTOP_DISK_H__
+
+#include <glibtop.h>
+#include <glibtop/global.h>
+
+G_BEGIN_DECLS
+
+#define GLIBTOP_XDISK_SECTORS_READ 0
+#define GLIBTOP_XDISK_TIME_READ 1
+#define GLIBTOP_XDISK_SECTORS_WRITE 2
+#define GLIBTOP_XDISK_TIME_WRITE 3
+
+#define GLIBTOP_MAX_DISK 4
+
+/* Nobody should really be using more than 4 disk.
+ Yes we are :)
+ Nobody should really be using more than 32 disk.
+*/
+#define GLIBTOP_NDISK 1024
+
+typedef struct _glibtop_disk glibtop_disk;
+
+struct _glibtop_disk
+{
+ guint64 xdisk_sectors_read [GLIBTOP_NDISK]; /* GLIBTOP_XDISK_SECTORS_READ */
+ guint64 xdisk_time_read [GLIBTOP_NDISK]; /* GLIBTOP_XDISK_TIME_READ */
+ guint64 xdisk_sectors_write [GLIBTOP_NDISK]; /* GLIBTOP_XDISK_SECTORS_WRITE */
+ guint64 xdisk_time_write [GLIBTOP_NDISK]; /* GLIBTOP_XDISK_TIME_WRITE */
+};
+
+void glibtop_get_disk(glibtop_disk *buf);
+
+#if GLIBTOP_SUID_DISK
+#define glibtop_get_disk_r glibtop_get_disk_p
+#else
+#define glibtop_get_disk_r glibtop_get_disk_s
+#endif
+
+void glibtop_get_disk_l (glibtop *server, glibtop_disk *buf);
+
+#if GLIBTOP_SUID_DISK
+void _glibtop_init_disk_p (glibtop *server);
+void glibtop_get_disk_p (glibtop *server, glibtop_disk *buf);
+#else
+void _glibtop_init_disk_s (glibtop *server);
+void glibtop_get_disk_s (glibtop *server, glibtop_disk *buf);
+#endif
+
+
+G_END_DECLS
+
+#endif