tarfile.py 文件源码

def chown(self, tarinfo, targetpath, numeric_owner):
        """Set owner of targetpath according to tarinfo. If numeric_owner
           is True, use .gid/.uid instead of .gname/.uname.
        """
        if pwd and hasattr(os, "geteuid") and os.geteuid() == 0:
            # We have to be root to do so.
            if numeric_owner:
                g = tarinfo.gid
                u = tarinfo.uid
            else:
                try:
                    g = grp.getgrnam(tarinfo.gname)[2]
                except KeyError:
                    g = tarinfo.gid
                try:
                    u = pwd.getpwnam(tarinfo.uname)[2]
                except KeyError:
                    u = tarinfo.uid
            try:
                if tarinfo.issym() and hasattr(os, "lchown"):
                    os.lchown(targetpath, u, g)
                else:
                    os.chown(targetpath, u, g)
            except OSError as e:
                raise ExtractError("could not change owner")