2 * Copyright (c) 2004 Silicon Graphics, Inc. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
28 * For further information regarding this notice, see:
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
34 * Test program that uses the same interfaces as mkfs.xfs for
35 * Linux, dumps out just the device size values from a driver.
41 #include <sys/ioctl.h>
42 #include <sys/mount.h>
45 # define BLKGETSIZE64 _IOR(0x12,114,size_t)
48 int main(int argc, char **argv)
55 fputs("insufficient arguments\n", stderr);
58 fd = open(argv[1], O_RDONLY);
64 error = ioctl(fd, BLKGETSIZE64, &size);
66 /* BLKGETSIZE64 returns size in bytes not 512-byte blocks */
67 sz = (long long)(size >> 9);
68 printf("%lld 512 byte blocks (BLKGETSIZE64)\n", sz);
70 /* If BLKGETSIZE64 fails, try BLKGETSIZE */
71 unsigned long tmpsize;
73 error = ioctl(fd, BLKGETSIZE, &tmpsize);
75 fprintf(stderr, "can't determine device size");
78 sz = (long long)tmpsize;
79 printf("%lld 512 byte blocks (BLKGETSIZE)\n", sz);