Method read_at

api/src/vfs/tmp.rs:304–313

(&self, buf: &mut [u8], offset: u64)

impl FileNodeOps for MemoryNode {
    fn read_at(&self, buf: &mut [u8], offset: u64) -> VfsResult<usize> {
        let file = self.inode.as_file()?;
        if let Some(symlink) = file.symlink.lock().as_ref() {
            assert_eq!(offset, 0);
            let len = buf.len().min(symlink.len());
            buf[..len].copy_from_slice(&symlink.as_bytes()[..len]);
            return Ok(len);
        }
        unreachable!("page cache should handle reading");
    }

    fn write_at(&self, _buf: &[u8], _offset: u64) -> VfsResult<usize> {
        unreachable!("page cache should handle writing");