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 numeric_owner
           is False, fall back to .gid/.uid when the search based on name
           fails.
        """
        if hasattr(os, "geteuid") and os.geteuid() == 0:
            # We have to be root to do so.
            g = tarinfo.gid
            u = tarinfo.uid
            if not numeric_owner:
                try:
                    if grp:
                        g = grp.getgrnam(tarinfo.gname)[2]
                except KeyError:
                    pass
                try:
                    if pwd:
                        u = pwd.getpwnam(tarinfo.uname)[2]
                except KeyError:
                    pass
            try:
                if tarinfo.issym() and hasattr(os, "lchown"):
                    os.lchown(targetpath, u, g)
                else:
                    os.chown(targetpath, u, g)
            except OSError:
                raise ExtractError("could not change owner")