| /* |
| * Copyright (c) 2004 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| * |
| * 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. |
| * |
| * This program is distributed in the hope that it would 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 the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * Test program that uses the same interfaces as mkfs.xfs for |
| * Linux, dumps out just the device size values from a driver. |
| */ |
| |
| #include <stdio.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include <sys/ioctl.h> |
| #include <sys/mount.h> |
| |
| #ifndef BLKGETSIZE64 |
| # define BLKGETSIZE64 _IOR(0x12,114,size_t) |
| #endif |
| |
| int main(int argc, char **argv) |
| { |
| __uint64_t size; |
| long long sz = -1; |
| int error, fd; |
| |
| if (argc != 2) { |
| fputs("insufficient arguments\n", stderr); |
| return 1; |
| } |
| fd = open(argv[1], O_RDONLY); |
| if (!fd) { |
| perror(argv[1]); |
| return 1; |
| } |
| |
| error = ioctl(fd, BLKGETSIZE64, &size); |
| if (error >= 0) { |
| /* BLKGETSIZE64 returns size in bytes not 512-byte blocks */ |
| sz = (long long)(size >> 9); |
| printf("%lld 512 byte blocks (BLKGETSIZE64)\n", sz); |
| } else { |
| /* If BLKGETSIZE64 fails, try BLKGETSIZE */ |
| unsigned long tmpsize; |
| |
| error = ioctl(fd, BLKGETSIZE, &tmpsize); |
| if (error < 0) { |
| fprintf(stderr, "can't determine device size"); |
| return 1; |
| } |
| sz = (long long)tmpsize; |
| printf("%lld 512 byte blocks (BLKGETSIZE)\n", sz); |
| } |
| return 0; |
| } |