import os import os.path from pip.compat import get_path_uid def check_path_owner(path): # If we don't have a way to check the effective uid of this process, then # we'll just assume that we own the directory. if not hasattr(os, "geteuid"): return True previous = None while path != previous: if os.path.lexists(path): # Check if path is writable by current user. if os.geteuid() == 0: # Special handling for root user in order to handle properly # cases where users use sudo without -H flag. try: path_uid = get_path_uid(path) except OSError: return False return path_uid == 0 else: return os.access(path, os.W_OK) else: previous, path = path, os.path.dirname(path)