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59 lines
1.0 KiB
C
59 lines
1.0 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* getsectsize.c --- get the sector size of a device.
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*
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* Copyright (C) 1995, 1995 Theodore Ts'o.
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* Copyright (C) 2003 VMware, Inc.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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*/
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#include <stdio.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#include <fcntl.h>
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#ifdef HAVE_LINUX_FD_H
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#include <sys/ioctl.h>
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#include <linux/fd.h>
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#endif
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#if defined(__linux__) && defined(_IO) && !defined(BLKSSZGET)
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#define BLKSSZGET _IO(0x12,104)/* get block device sector size */
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#endif
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#include "ext2_fs.h"
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#include "ext2fs.h"
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/*
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* Returns the number of blocks in a partition
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*/
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errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize)
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{
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int fd;
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#ifdef CONFIG_LFS
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fd = open64(file, O_RDONLY);
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#else
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fd = open(file, O_RDONLY);
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#endif
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if (fd < 0)
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return errno;
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#ifdef BLKSSZGET
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if (ioctl(fd, BLKSSZGET, sectsize) >= 0) {
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close(fd);
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return 0;
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}
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#endif
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*sectsize = 0;
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close(fd);
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return 0;
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}
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