Function nc::fstatfs

pub fn fstatfs(fd: i32, buf: &mut statfs_t) -> Result<(), Errno>

Get filesystem statistics.

let path = "/usr";
// Open folder directly.
let fd = nc::openat(nc::AT_FDCWD, path, nc::O_PATH, 0);
assert!(fd.is_ok());
let fd = fd.unwrap();
let mut statfs = nc::statfs_t::default();
let ret = nc::fstatfs(fd, &mut statfs);
assert!(ret.is_ok());
assert!(statfs.f_bfree > 0);
assert!(statfs.f_bavail > 0);
assert!(nc::close(fd).is_ok());