statfs returns information about a mounted file system. path is the path name of any file within the mounted filesystem.
buf is a pointer to a statfs structure defined as follow:
long f_type; /* type of filesystem (see below) */
long f_bsize; /* optimal transfer block size */
long f_blocks; /* total data blocks in file system */
long f_bfree; /* free blocks in fs */
long f_bavail; /* free blocks avail to non-superuser */
long f_files; /* total file nodes in file system */
long f_ffree; /* free file nodes in fs */
long f_ffree; /* free file nodes in fs */
fsid_t f_fsid; /* file system id */
long f_namelen; /* maximum length of filenames */
long f_spare[6]; /* spare for later */
};
Fields that are undefined for a particular file system are set to 0.
A component of the path prefix of path is not a directory.
path is too long.
The file referred to by path does not exist.
Search permission is denied for a component of the path prefix of path.
Too many symbolic links were encountered in translating path.
Buf or path points to an invalid address.
An I/O error occurred while reading from or writing to the file system.
Insufficient kernel memory was available.
The filesystem path is on does not support statfs.