Function nc::fgetxattr

pub unsafe fn fgetxattr<P: AsRef<Path>>(
    fd: i32,
    name: P,
    value: usize,
    size: size_t
) -> Result<ssize_t, Errno>

Get extended attribute value.

Example

let path = "/tmp/nc-fgetxattr";
let fd = unsafe { nc::openat(nc::AT_FDCWD, path, nc::O_WRONLY | nc::O_CREAT, 0o644) };
assert!(fd.is_ok());
let fd = fd.unwrap();
let attr_name = "user.creator";
let attr_value = "nc-0.0.1";
//let flags = 0;
let flags = nc::XATTR_CREATE;
let ret = unsafe {
    nc::setxattr(
        path,
        &attr_name,
        attr_value.as_ptr() as usize,
        attr_value.len(),
        flags,
    )
};
assert!(ret.is_ok());
let mut buf = [0_u8; 16];
let buf_len = buf.len();
let ret = unsafe { nc::fgetxattr(fd, attr_name, buf.as_mut_ptr() as usize, buf_len) };
assert!(ret.is_ok());
assert_eq!(ret, Ok(attr_value.len() as nc::ssize_t));
let attr_len = ret.unwrap() as usize;
assert_eq!(attr_value.as_bytes(), &buf[..attr_len]);
let ret = unsafe { nc::close(fd) };
assert!(ret.is_ok());
let ret = unsafe { nc::unlinkat(nc::AT_FDCWD, path, 0) };
assert!(ret.is_ok());