code: def link(src, dst):
      """Hard links ``src`` to ``dst``, returning 0 or errno.
  
      Note that the special errno ``ENOLINK`` will be returned if ``os.link`` isn't
      supported by the operating system.
      """
  
      if not hasattr(os, "link"):
          return ENOLINK
      link_errno = 0
      try:
          os.link(src, dst)
      except OSError as e:
          link_errno = e.errno
      return link_errno
  
imports: import os
  import sys
  import errno
  import shutil
  import random
  import glob
  from IPython.utils.process import system
label_desc: Use image node_id 14 for calling a global function with example usage: link(src, dst) and returns: link_errno, ENOLINK