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#include <sys/statfs.h>
#include "libbb.h"
/*
* Code from libguestfs (with addition of GetVolumeInformation call)
*/
int statfs(const char *file, struct statfs *buf)
{
ULONGLONG free_bytes_available; /* for user - similar to bavail */
ULONGLONG total_number_of_bytes;
ULONGLONG total_number_of_free_bytes; /* for everyone - bfree */
DWORD serial, namelen, flags;
char fsname[100];
struct mntent *mnt;
/* Valid filesystem names don't seem to be documented. The following
* are present in Wine (dlls/kernel32/volume.c). */
#define FS_NAMES "NTFS\0FAT\0FAT32\0CDFS\0UDF\0"
int fstypes[] = {0, 0x5346544e, 0x4006, 0x4006, 0x9660, 0x15013346};
if ( (mnt=find_mount_point(file, 0)) == NULL ) {
return -1;
}
file = mnt->mnt_dir;
if ( !GetDiskFreeSpaceEx(file, (PULARGE_INTEGER) &free_bytes_available,
(PULARGE_INTEGER) &total_number_of_bytes,
(PULARGE_INTEGER) &total_number_of_free_bytes) ) {
errno = err_win_to_posix();
return -1;
}
if ( !GetVolumeInformation(file, NULL, 0, &serial, &namelen, &flags,
fsname, 100) ) {
errno = err_win_to_posix();
return -1;
}
memset(buf, 0, sizeof(*buf));
/* XXX I couldn't determine how to get block size. MSDN has a
* unhelpful hard-coded list here:
* http://support.microsoft.com/kb/140365
* but this depends on the filesystem type, the size of the disk and
* the version of Windows. So this code assumes the disk is NTFS
* and the version of Windows is >= Win2K.
*/
if (total_number_of_bytes < UINT64_C(16) * 1024 * 1024 * 1024 * 1024)
buf->f_bsize = 4096;
else if (total_number_of_bytes < UINT64_C(32) * 1024 * 1024 * 1024 * 1024)
buf->f_bsize = 8192;
else if (total_number_of_bytes < UINT64_C(64) * 1024 * 1024 * 1024 * 1024)
buf->f_bsize = 16384;
else if (total_number_of_bytes < UINT64_C(128) * 1024 * 1024 * 1024 * 1024)
buf->f_bsize = 32768;
else
buf->f_bsize = 65536;
buf->f_type = fstypes[index_in_strings(FS_NAMES, fsname)+1];
buf->f_frsize = buf->f_bsize;
buf->f_blocks = total_number_of_bytes / buf->f_bsize;
buf->f_bfree = total_number_of_free_bytes / buf->f_bsize;
buf->f_bavail = free_bytes_available / buf->f_bsize;
//buf->f_files = 0;
//buf->f_ffree = 0;
buf->f_fsid = serial;
//buf->f_flag = 0;
buf->f_namelen = namelen;
return 0;
}
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