58 lines
1.0 KiB
C
58 lines
1.0 KiB
C
/*
|
|
* getsectsize.c --- get the sector size of a device.
|
|
*
|
|
* Copyright (C) 1995, 1995 Theodore Ts'o.
|
|
* Copyright (C) 2003 VMware, Inc.
|
|
*
|
|
* %Begin-Header%
|
|
* This file may be redistributed under the terms of the GNU Public
|
|
* License.
|
|
* %End-Header%
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#if HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#if HAVE_ERRNO_H
|
|
#include <errno.h>
|
|
#endif
|
|
#include <fcntl.h>
|
|
#ifdef HAVE_LINUX_FD_H
|
|
#include <sys/ioctl.h>
|
|
#include <linux/fd.h>
|
|
#endif
|
|
|
|
#if defined(__linux__) && defined(_IO) && !defined(BLKGETSIZE)
|
|
#define BLKSSZGET _IO(0x12,104)/* get block device sector size */
|
|
#endif
|
|
|
|
#include "ext2_fs.h"
|
|
#include "ext2fs.h"
|
|
|
|
/*
|
|
* Returns the number of blocks in a partition
|
|
*/
|
|
errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize)
|
|
{
|
|
int fd;
|
|
|
|
#ifdef CONFIG_LFS
|
|
fd = open64(file, O_RDONLY);
|
|
#else
|
|
fd = open(file, O_RDONLY);
|
|
#endif
|
|
if (fd < 0)
|
|
return errno;
|
|
|
|
#ifdef BLKSSZGET
|
|
if (ioctl(fd, BLKSSZGET, sectsize) >= 0) {
|
|
close(fd);
|
|
return 0;
|
|
}
|
|
#endif
|
|
*sectsize = 0;
|
|
close(fd);
|
|
return 0;
|
|
}
|