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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
_pyrepl	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
asyncio	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
collections	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
concurrent	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
config-3.13-x86_64-linux-gnu	[ DIR ]	drwxr-xr-x	2026-08-17 17:23
ctypes	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
curses	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
dbm	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
email	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
encodings	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
ensurepip	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
html	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
http	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
importlib	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
json	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
lib-dynload	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
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multiprocessing	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
pathlib	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
pydoc_data	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
re	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
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sqlite3	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
sysconfig	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
tomllib	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
unittest	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
urllib	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
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zipfile	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
zoneinfo	[ DIR ]	drwxr-xr-x	2026-08-17 15:49
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__future__.py	5.1 KB	-rw-r--r--	2026-06-11 15:08
__hello__.py	227 B	-rw-r--r--	2026-06-11 15:08
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calendar.py	25.47 KB	-rw-r--r--	2026-06-11 15:08
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csv.py	18.73 KB	-rw-r--r--	2026-06-11 15:08
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datetime.py	268 B	-rw-r--r--	2026-06-11 15:08
decimal.py	2.73 KB	-rw-r--r--	2026-06-11 15:08
difflib.py	81.41 KB	-rw-r--r--	2026-06-11 15:08
dis.py	40 KB	-rw-r--r--	2026-06-11 15:08
doctest.py	106.85 KB	-rw-r--r--	2026-06-11 15:08
enum.py	83.62 KB	-rw-r--r--	2026-06-11 15:08
filecmp.py	10.4 KB	-rw-r--r--	2026-06-11 15:08
fileinput.py	15.35 KB	-rw-r--r--	2026-06-11 15:08
fnmatch.py	6.04 KB	-rw-r--r--	2026-06-11 15:08
fractions.py	39.15 KB	-rw-r--r--	2026-06-11 15:08
ftplib.py	34.41 KB	-rw-r--r--	2026-06-11 15:08
functools.py	38.15 KB	-rw-r--r--	2026-06-11 15:08
genericpath.py	6.1 KB	-rw-r--r--	2026-06-11 15:08
getopt.py	7.31 KB	-rw-r--r--	2026-06-11 15:08
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gettext.py	21.03 KB	-rw-r--r--	2026-06-11 15:08
glob.py	20.43 KB	-rw-r--r--	2026-06-11 15:08
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gzip.py	24.03 KB	-rw-r--r--	2026-06-11 15:08
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heapq.py	22.48 KB	-rw-r--r--	2026-06-11 15:08
hmac.py	7.58 KB	-rw-r--r--	2026-06-11 15:08
imaplib.py	53.09 KB	-rw-r--r--	2026-06-11 15:08
inspect.py	125.91 KB	-rw-r--r--	2026-06-11 15:08
io.py	3.5 KB	-rw-r--r--	2026-06-11 15:08
ipaddress.py	79.74 KB	-rw-r--r--	2026-06-11 15:08
keyword.py	1.05 KB	-rw-r--r--	2026-06-11 15:08
linecache.py	7.31 KB	-rw-r--r--	2026-06-11 15:08
locale.py	85.3 KB	-rw-r--r--	2026-06-11 15:08
lzma.py	13.08 KB	-rw-r--r--	2026-06-11 15:08
mailbox.py	79.62 KB	-rw-r--r--	2026-06-11 15:08
mimetypes.py	23.29 KB	-rw-r--r--	2026-06-11 15:08
modulefinder.py	23.23 KB	-rw-r--r--	2026-06-11 15:08
netrc.py	6.87 KB	-rw-r--r--	2026-06-11 15:08
ntpath.py	30.17 KB	-rw-r--r--	2026-06-11 15:08
nturl2path.py	2.32 KB	-rw-r--r--	2026-06-11 15:08
numbers.py	11.49 KB	-rw-r--r--	2026-06-11 15:08
opcode.py	2.76 KB	-rw-r--r--	2026-06-11 15:08
operator.py	10.72 KB	-rw-r--r--	2026-06-11 15:08
optparse.py	58.95 KB	-rw-r--r--	2026-06-11 15:08
os.py	40.65 KB	-rw-r--r--	2026-06-11 15:08
pdb.py	90.37 KB	-rwxr-xr-x	2026-06-11 15:08
pickle.py	65.14 KB	-rw-r--r--	2026-06-11 15:08
pickletools.py	91.85 KB	-rw-r--r--	2026-06-11 15:08
pkgutil.py	17.85 KB	-rw-r--r--	2026-06-11 15:08
platform.py	46.25 KB	-rwxr-xr-x	2026-06-11 15:08
plistlib.py	29.32 KB	-rw-r--r--	2026-06-11 15:08
poplib.py	14.26 KB	-rw-r--r--	2026-06-11 15:08
posixpath.py	17.81 KB	-rw-r--r--	2026-06-11 15:08
pprint.py	23.59 KB	-rw-r--r--	2026-06-11 15:08
profile.py	22.61 KB	-rwxr-xr-x	2026-06-11 15:08
pstats.py	28.61 KB	-rw-r--r--	2026-06-11 15:08
pty.py	5.99 KB	-rw-r--r--	2026-06-11 15:08
py_compile.py	7.65 KB	-rw-r--r--	2026-06-11 15:08
pyclbr.py	11.13 KB	-rw-r--r--	2026-06-11 15:08
pydoc.py	107.91 KB	-rwxr-xr-x	2026-06-11 15:08
queue.py	13.14 KB	-rw-r--r--	2026-06-11 15:08
quopri.py	7.03 KB	-rwxr-xr-x	2026-06-11 15:08
random.py	36.14 KB	-rw-r--r--	2026-06-11 15:08
reprlib.py	7.88 KB	-rw-r--r--	2026-06-11 15:08
rlcompleter.py	7.64 KB	-rw-r--r--	2026-06-11 15:08
runpy.py	12.96 KB	-rw-r--r--	2026-06-11 15:08
sched.py	6.2 KB	-rw-r--r--	2026-06-11 15:08
secrets.py	1.94 KB	-rw-r--r--	2026-06-11 15:08
selectors.py	19 KB	-rw-r--r--	2026-06-11 15:08
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shutil.py	55.79 KB	-rw-r--r--	2026-06-11 15:08
signal.py	2.44 KB	-rw-r--r--	2026-06-11 15:08
site.py	24.96 KB	-rw-r--r--	2026-06-11 15:08
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socket.py	37.13 KB	-rw-r--r--	2026-06-11 15:08
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statistics.py	60.72 KB	-rw-r--r--	2026-06-11 15:08
string.py	11.51 KB	-rw-r--r--	2026-06-11 15:08
stringprep.py	12.61 KB	-rw-r--r--	2026-06-11 15:08
struct.py	257 B	-rw-r--r--	2026-06-11 15:08
subprocess.py	88.7 KB	-rw-r--r--	2026-06-11 15:08
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tabnanny.py	11.27 KB	-rwxr-xr-x	2026-06-11 15:08
tarfile.py	113.08 KB	-rwxr-xr-x	2026-06-11 15:08
tempfile.py	31.78 KB	-rw-r--r--	2026-06-11 15:08
textwrap.py	19.49 KB	-rw-r--r--	2026-06-11 15:08
this.py	1003 B	-rw-r--r--	2026-06-11 15:08
threading.py	54.05 KB	-rw-r--r--	2026-06-11 15:08
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traceback.py	64.82 KB	-rw-r--r--	2026-06-11 15:08
tracemalloc.py	17.62 KB	-rw-r--r--	2026-06-11 15:08
tty.py	1.99 KB	-rw-r--r--	2026-06-11 15:08
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zipimport.py	32.12 KB	-rw-r--r--	2026-06-11 15:08

Rename

"""Pseudo terminal utilities."""

# Bugs: No signal handling.  Doesn't set slave termios and window size.
#       Only tested on Linux, FreeBSD, and macOS.
# See:  W. Richard Stevens. 1992.  Advanced Programming in the
#       UNIX Environment.  Chapter 19.
# Author: Steen Lumholt -- with additions by Guido.

from select import select
import os
import sys
import tty

# names imported directly for test mocking purposes
from os import close, waitpid
from tty import setraw, tcgetattr, tcsetattr

__all__ = ["openpty", "fork", "spawn"]

STDIN_FILENO = 0
STDOUT_FILENO = 1
STDERR_FILENO = 2

CHILD = 0

def openpty():
    """openpty() -> (master_fd, slave_fd)
    Open a pty master/slave pair, using os.openpty() if possible."""

try:
        return os.openpty()
    except (AttributeError, OSError):
        pass
    master_fd, slave_name = _open_terminal()
    slave_fd = slave_open(slave_name)
    return master_fd, slave_fd

def master_open():
    """master_open() -> (master_fd, slave_name)
    Open a pty master and return the fd, and the filename of the slave end.
    Deprecated, use openpty() instead."""

import warnings
    warnings.warn("Use pty.openpty() instead.", DeprecationWarning, stacklevel=2)  # Remove API in 3.14

try:
        master_fd, slave_fd = os.openpty()
    except (AttributeError, OSError):
        pass
    else:
        slave_name = os.ttyname(slave_fd)
        os.close(slave_fd)
        return master_fd, slave_name

return _open_terminal()

def _open_terminal():
    """Open pty master and return (master_fd, tty_name)."""
    for x in 'pqrstuvwxyzPQRST':
        for y in '0123456789abcdef':
            pty_name = '/dev/pty' + x + y
            try:
                fd = os.open(pty_name, os.O_RDWR)
            except OSError:
                continue
            return (fd, '/dev/tty' + x + y)
    raise OSError('out of pty devices')

def slave_open(tty_name):
    """slave_open(tty_name) -> slave_fd
    Open the pty slave and acquire the controlling terminal, returning
    opened filedescriptor.
    Deprecated, use openpty() instead."""

import warnings
    warnings.warn("Use pty.openpty() instead.", DeprecationWarning, stacklevel=2)  # Remove API in 3.14

result = os.open(tty_name, os.O_RDWR)
    try:
        from fcntl import ioctl, I_PUSH
    except ImportError:
        return result
    try:
        ioctl(result, I_PUSH, "ptem")
        ioctl(result, I_PUSH, "ldterm")
    except OSError:
        pass
    return result

def fork():
    """fork() -> (pid, master_fd)
    Fork and make the child a session leader with a controlling terminal."""

try:
        pid, fd = os.forkpty()
    except (AttributeError, OSError):
        pass
    else:
        if pid == CHILD:
            try:
                os.setsid()
            except OSError:
                # os.forkpty() already set us session leader
                pass
        return pid, fd

master_fd, slave_fd = openpty()
    pid = os.fork()
    if pid == CHILD:
        os.close(master_fd)
        os.login_tty(slave_fd)
    else:
        os.close(slave_fd)

# Parent and child process.
    return pid, master_fd

def _read(fd):
    """Default read function."""
    return os.read(fd, 1024)

def _copy(master_fd, master_read=_read, stdin_read=_read):
    """Parent copy loop.
    Copies
            pty master -> standard output   (master_read)
            standard input -> pty master    (stdin_read)"""
    if os.get_blocking(master_fd):
        # If we write more than tty/ndisc is willing to buffer, we may block
        # indefinitely. So we set master_fd to non-blocking temporarily during
        # the copy operation.
        os.set_blocking(master_fd, False)
        try:
            _copy(master_fd, master_read=master_read, stdin_read=stdin_read)
        finally:
            # restore blocking mode for backwards compatibility
            os.set_blocking(master_fd, True)
        return
    high_waterlevel = 4096
    stdin_avail = master_fd != STDIN_FILENO
    stdout_avail = master_fd != STDOUT_FILENO
    i_buf = b''
    o_buf = b''
    while 1:
        rfds = []
        wfds = []
        if stdin_avail and len(i_buf) < high_waterlevel:
            rfds.append(STDIN_FILENO)
        if stdout_avail and len(o_buf) < high_waterlevel:
            rfds.append(master_fd)
        if stdout_avail and len(o_buf) > 0:
            wfds.append(STDOUT_FILENO)
        if len(i_buf) > 0:
            wfds.append(master_fd)

rfds, wfds, _xfds = select(rfds, wfds, [])

if STDOUT_FILENO in wfds:
            try:
                n = os.write(STDOUT_FILENO, o_buf)
                o_buf = o_buf[n:]
            except OSError:
                stdout_avail = False

if master_fd in rfds:
            # Some OSes signal EOF by returning an empty byte string,
            # some throw OSErrors.
            try:
                data = master_read(master_fd)
            except OSError:
                data = b""
            if not data:  # Reached EOF.
                return    # Assume the child process has exited and is
                          # unreachable, so we clean up.
            o_buf += data

if master_fd in wfds:
            n = os.write(master_fd, i_buf)
            i_buf = i_buf[n:]

if stdin_avail and STDIN_FILENO in rfds:
            data = stdin_read(STDIN_FILENO)
            if not data:
                stdin_avail = False
            else:
                i_buf += data

def spawn(argv, master_read=_read, stdin_read=_read):
    """Create a spawned process."""
    if isinstance(argv, str):
        argv = (argv,)
    sys.audit('pty.spawn', argv)

pid, master_fd = fork()
    if pid == CHILD:
        os.execlp(argv[0], *argv)

try:
        mode = tcgetattr(STDIN_FILENO)
        setraw(STDIN_FILENO)
        restore = True
    except tty.error:    # This is the same as termios.error
        restore = False

try:
        _copy(master_fd, master_read, stdin_read)
    finally:
        if restore:
            tcsetattr(STDIN_FILENO, tty.TCSAFLUSH, mode)

close(master_fd)
    return waitpid(pid, 0)[1]