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File Content: `_bootsubprocess.py`

"""
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):
            return False
        if not arg:
            # reject empty string
            return False
        for ch in arg:
            if ch not in safe_chars:
                return False

    return True


# _aix_support used by distutil.util calls subprocess.check_output()
def check_output(cmd, **kwargs):
    if kwargs:
        raise NotImplementedError(repr(kwargs))

    if not _check_cmd(cmd):
        raise ValueError(f"unsupported command: {cmd!r}")

    tmp_filename = "check_output.tmp"
    if not isinstance(cmd, str):
        cmd = " ".join(cmd)
    cmd = f"{cmd} >{tmp_filename}"

    try:
        # system() spawns a shell
        status = os.system(cmd)
        exitcode = os.waitstatus_to_exitcode(status)
        if exitcode:
            raise ValueError(f"Command {cmd!r} returned non-zero "
                             f"exit status {exitcode!r}")

        try:
            with open(tmp_filename, "rb") as fp:
                stdout = fp.read()
        except FileNotFoundError:
            stdout = b''
    finally:
        try:
            os.unlink(tmp_filename)
        except OSError:
            pass

    return stdout

Name	Size	Permission
__phello__	---	0755
__pycache__	---	0755
asyncio	---	0755
collections	---	0755
concurrent	---	0755
config-3.11-x86_64-linux-gnu	---	0755
ctypes	---	0755
curses	---	0755
dbm	---	0755
distutils	---	0755
email	---	0755
encodings	---	0755
ensurepip	---	0755
html	---	0755
http	---	0755
importlib	---	0755
json	---	0755
lib-dynload	---	0755
lib2to3	---	0755
logging	---	0755
multiprocessing	---	0755
pydoc_data	---	0755
re	---	0755
site-packages	---	0755
sqlite3	---	0755
tomllib	---	0755
unittest	---	0755
urllib	---	0755
venv	---	0755
wsgiref	---	0755
xml	---	0755
xmlrpc	---	0755
zoneinfo	---	0755
LICENSE.txt	13936 bytes	0644
__future__.py	5218 bytes	0644
__hello__.py	227 bytes	0644
_aix_support.py	3389 bytes	0644
_bootsubprocess.py	2675 bytes	0644
_collections_abc.py	30193 bytes	0644
_compat_pickle.py	8761 bytes	0644
_compression.py	5681 bytes	0644
_markupbase.py	14653 bytes	0644
_osx_support.py	22023 bytes	0644
_py_abc.py	6189 bytes	0644
_pydecimal.py	229202 bytes	0644
_pyio.py	94193 bytes	0644
_sitebuiltins.py	3128 bytes	0644
_strptime.py	25175 bytes	0644
_sysconfigdata__linux_x86_64-linux-gnu.py	58894 bytes	0644
_sysconfigdata_d_linux_x86_64-linux-gnu.py	58127 bytes	0644
_threading_local.py	7220 bytes	0644
_weakrefset.py	5893 bytes	0644
abc.py	6538 bytes	0644
aifc.py	34211 bytes	0644
antigravity.py	500 bytes	0644
argparse.py	100283 bytes	0644
ast.py	61444 bytes	0644
asynchat.py	11570 bytes	0644
asyncore.py	20310 bytes	0644
base64.py	21041 bytes	0755
bdb.py	32463 bytes	0644
bisect.py	3135 bytes	0644
bz2.py	11847 bytes	0644
cProfile.py	6359 bytes	0755
calendar.py	24731 bytes	0644
cgi.py	34432 bytes	0755
cgitb.py	12421 bytes	0644
chunk.py	5500 bytes	0644
cmd.py	14873 bytes	0644
code.py	10622 bytes	0644
codecs.py	37150 bytes	0644
codeop.py	5907 bytes	0644
colorsys.py	4062 bytes	0644
compileall.py	20252 bytes	0644
configparser.py	55660 bytes	0644
contextlib.py	27414 bytes	0644
contextvars.py	129 bytes	0644
copy.py	8681 bytes	0644
copyreg.py	7677 bytes	0644
crypt.py	3913 bytes	0644
csv.py	16030 bytes	0644
dataclasses.py	58472 bytes	0644
datetime.py	91832 bytes	0644
decimal.py	320 bytes	0644
difflib.py	83308 bytes	0644
dis.py	28906 bytes	0644
doctest.py	106297 bytes	0644
enum.py	79583 bytes	0644
filecmp.py	10178 bytes	0644
fileinput.py	15714 bytes	0644
fnmatch.py	5999 bytes	0644
fractions.py	28677 bytes	0644
ftplib.py	35815 bytes	0644
functools.py	38413 bytes	0644
genericpath.py	4975 bytes	0644
getopt.py	7489 bytes	0644
getpass.py	5990 bytes	0644
gettext.py	21320 bytes	0644
glob.py	8732 bytes	0644
graphlib.py	9656 bytes	0644
gzip.py	24074 bytes	0644
hashlib.py	11765 bytes	0644
heapq.py	23024 bytes	0644
hmac.py	7716 bytes	0644
imaplib.py	54865 bytes	0644
imghdr.py	3952 bytes	0644
imp.py	10606 bytes	0644
inspect.py	123419 bytes	0644
io.py	4320 bytes	0644
ipaddress.py	75075 bytes	0644
keyword.py	1061 bytes	0644
linecache.py	5649 bytes	0644
locale.py	79095 bytes	0644
lzma.py	13277 bytes	0644
mailbox.py	78830 bytes	0644
mailcap.py	9369 bytes	0644
mimetypes.py	22962 bytes	0644
modulefinder.py	23699 bytes	0644
netrc.py	6929 bytes	0644
nntplib.py	41087 bytes	0644
ntpath.py	30222 bytes	0644
nturl2path.py	2887 bytes	0644
numbers.py	10348 bytes	0644
opcode.py	10447 bytes	0644
operator.py	10965 bytes	0644
optparse.py	60369 bytes	0644
os.py	39530 bytes	0644
pathlib.py	48566 bytes	0644
pdb.py	64186 bytes	0755
pickle.py	65132 bytes	0644
pickletools.py	93861 bytes	0644
pipes.py	8978 bytes	0644
pkgutil.py	24638 bytes	0644
platform.py	42287 bytes	0755
plistlib.py	28354 bytes	0644
poplib.py	15198 bytes	0644
posixpath.py	17013 bytes	0644
pprint.py	24583 bytes	0644
profile.py	22896 bytes	0755
pstats.py	29356 bytes	0644
pty.py	6317 bytes	0644
py_compile.py	7837 bytes	0644
pyclbr.py	11396 bytes	0644
pydoc.py	112664 bytes	0755
queue.py	11496 bytes	0644
quopri.py	7281 bytes	0755
random.py	32162 bytes	0644
reprlib.py	5437 bytes	0644
rlcompleter.py	7827 bytes	0644
runpy.py	13159 bytes	0644
sched.py	6351 bytes	0644
secrets.py	2028 bytes	0644
selectors.py	19671 bytes	0644
shelve.py	8560 bytes	0644
shlex.py	13501 bytes	0644
shutil.py	56517 bytes	0644
signal.py	2495 bytes	0644
site.py	22987 bytes	0644
smtpd.py	31175 bytes	0755
smtplib.py	45431 bytes	0755
sndhdr.py	7448 bytes	0644
socket.py	37336 bytes	0644
socketserver.py	27586 bytes	0644
sre_compile.py	231 bytes	0644
sre_constants.py	232 bytes	0644
sre_parse.py	229 bytes	0644
ssl.py	54305 bytes	0644
stat.py	5485 bytes	0644
statistics.py	47705 bytes	0644
string.py	11786 bytes	0644
stringprep.py	12917 bytes	0644
struct.py	257 bytes	0644
subprocess.py	88725 bytes	0644
sunau.py	18480 bytes	0644
symtable.py	10368 bytes	0644
sysconfig.py	30315 bytes	0644
tabnanny.py	11312 bytes	0755
tarfile.py	106350 bytes	0755
telnetlib.py	23301 bytes	0644
tempfile.py	31873 bytes	0644
textwrap.py	19718 bytes	0644
this.py	1003 bytes	0644
threading.py	58231 bytes	0644
timeit.py	13532 bytes	0755
token.py	2386 bytes	0644
tokenize.py	26336 bytes	0644
trace.py	29196 bytes	0755
traceback.py	40547 bytes	0644
tracemalloc.py	18047 bytes	0644
tty.py	879 bytes	0644
types.py	10067 bytes	0644
typing.py	120951 bytes	0644
uu.py	7341 bytes	0644
uuid.py	27597 bytes	0644
warnings.py	21110 bytes	0644
wave.py	21818 bytes	0644
weakref.py	21513 bytes	0644
webbrowser.py	25149 bytes	0755
xdrlib.py	5977 bytes	0644
zipapp.py	7535 bytes	0644
zipfile.py	93652 bytes	0644
zipimport.py	30897 bytes	0644

File Content: _bootsubprocess.py

File Content: `_bootsubprocess.py`