| /* vi: set sw=4 ts=4: */ |
| /* |
| * 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(BLKSSZGET) |
| #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; |
| } |
