����JFIF�


�x�x�����C�



		



	
���C
�����
"�

�����






��������
	
�����
��
}
�!1AQa"q2���#B��R��$3br�	
%&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz�������������������������������������������������������������������������
�








������
	
�����
�
w�
!1AQaq"2�B����	#3R�br�
$4�%�&'()*56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz������������������������������������������������������������������������
��?�����N����m?����j����EP��https"""
Basic subprocess implementation for POSIX which only uses os functions. Only
implement features required by setup.py to build C extension modules when
subprocess is unavailable. setup.py is not used on Windows.
"""
import os


# distutils.spawn used by distutils.command.build_ext
# calls subprocess.Popen().wait()
class Popen:
    def __init__(self, cmd, env=None):
        self._cmd = cmd
        self._env = env
        self.returncode = None

    def wait(self):
        pid = os.fork()
        if pid == 0:
            # Child process
            try:
                if self._env is not None:
                    os.execve(self._cmd[0], self._cmd, self._env)
                else:
                    os.execv(self._cmd[0], self._cmd)
            finally:
                os._exit(1)
        else:
            # Parent process
            _, status = os.waitpid(pid, 0)
            self.returncode = os.waitstatus_to_exitcode(status)

        return self.returncode


def _check_cmd(cmd):
    # Use regex [a-zA-Z0-9./-]+: reject empty string, space, etc.
    safe_chars = []
    for first, last in (("a", "z"), ("A", "Z"), ("0", "9")):
        for ch in range(ord(first), ord(last) + 1):
            safe_chars.append(chr(ch))
    safe_chars.append("./-")
    safe_chars = ''.join(safe_chars)

    if isinstance(cmd, (tuple, list)):
        check_strs = cmd
    elif isinstance(cmd, str):
        check_strs = [cmd]
    else:
        return False

    for arg in check_strs:
        if not isinstance(arg, str):
            retu