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/*
* 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;
}
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