1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
/// Make a new name for a file.
///
/// # Examples
///
/// ```
/// let old_filename = "/tmp/nc-linkat-src";
/// let ret = unsafe { nc::openat(nc::AT_FDCWD, old_filename, nc::O_WRONLY | nc::O_CREAT, 0o644) };
/// assert!(ret.is_ok());
/// let fd = ret.unwrap();
/// let ret = unsafe { nc::close(fd) };
/// assert!(ret.is_ok());
/// let new_filename = "/tmp/nc-linkat-dst";
/// let flags = nc::AT_SYMLINK_FOLLOW;
/// let ret = unsafe { nc::linkat(nc::AT_FDCWD, old_filename, nc::AT_FDCWD, new_filename, flags) };
/// assert!(ret.is_ok());
/// let ret = unsafe { nc::unlinkat(nc::AT_FDCWD, old_filename, 0) };
/// assert!(ret.is_ok());
/// let ret = unsafe { nc::unlinkat(nc::AT_FDCWD, new_filename, 0) };
/// assert!(ret.is_ok());
/// ```
pub unsafe fn linkat<P: AsRef<Path>>(
olddfd: i32,
oldfilename: P,
newdfd: i32,
newfilename: P,
flags: i32,
) -> Result<(), Errno> {
let olddfd = olddfd as usize;
let oldfilename = CString::new(oldfilename.as_ref());
let oldfilename_ptr = oldfilename.as_ptr() as usize;
let newdfd = newdfd as usize;
let newfilename = CString::new(newfilename.as_ref());
let newfilename_ptr = newfilename.as_ptr() as usize;
let flags = flags as usize;
syscall5(
SYS_LINKAT,
olddfd,
oldfilename_ptr,
newdfd,
newfilename_ptr,
flags,
)
.map(drop)
}