Current Dir: /snap/core22/2955/usr/lib/python3.10/
[DIR] asyncio [ delete | rename ]
[DIR] collections [ delete | rename ]
[DIR] concurrent [ delete | rename ]
[DIR] ctypes [ delete | rename ]
[DIR] curses [ delete | rename ]
[DIR] dbm [ delete | rename ]
[DIR] distutils [ delete | rename ]
[DIR] email [ delete | rename ]
[DIR] encodings [ delete | rename ]
[DIR] html [ delete | rename ]
[DIR] http [ delete | rename ]
[DIR] importlib [ delete | rename ]
[DIR] json [ delete | rename ]
[DIR] lib-dynload [ delete | rename ]
[DIR] lib2to3 [ delete | rename ]
[DIR] logging [ delete | rename ]
[DIR] multiprocessing [ delete | rename ]
[DIR] pydoc_data [ delete | rename ]
[DIR] sqlite3 [ delete | rename ]
[DIR] test [ delete | rename ]
[DIR] unittest [ delete | rename ]
[DIR] urllib [ delete | rename ]
[DIR] venv [ delete | rename ]
[DIR] wsgiref [ delete | rename ]
[DIR] xml [ delete | rename ]
[DIR] xmlrpc [ delete | rename ]
[DIR] zoneinfo [ delete | rename ]
[DIR] __pycache__ [ delete | rename ]
[FILE] abc.py [ edit | delete | rename ]
[FILE] aifc.py [ edit | delete | rename ]
[FILE] antigravity.py [ edit | delete | rename ]
[FILE] argparse.py [ edit | delete | rename ]
[FILE] ast.py [ edit | delete | rename ]
[FILE] asynchat.py [ edit | delete | rename ]
[FILE] asyncore.py [ edit | delete | rename ]
[FILE] base64.py [ edit | delete | rename ]
[FILE] bdb.py [ edit | delete | rename ]
[FILE] binhex.py [ edit | delete | rename ]
[FILE] bisect.py [ edit | delete | rename ]
[FILE] bz2.py [ edit | delete | rename ]
[FILE] calendar.py [ edit | delete | rename ]
[FILE] cgi.py [ edit | delete | rename ]
[FILE] cgitb.py [ edit | delete | rename ]
[FILE] chunk.py [ edit | delete | rename ]
[FILE] cmd.py [ edit | delete | rename ]
[FILE] code.py [ edit | delete | rename ]
[FILE] codecs.py [ edit | delete | rename ]
[FILE] codeop.py [ edit | delete | rename ]
[FILE] colorsys.py [ edit | delete | rename ]
[FILE] compileall.py [ edit | delete | rename ]
[FILE] configparser.py [ edit | delete | rename ]
[FILE] contextlib.py [ edit | delete | rename ]
[FILE] contextvars.py [ edit | delete | rename ]
[FILE] copy.py [ edit | delete | rename ]
[FILE] copyreg.py [ edit | delete | rename ]
[FILE] cProfile.py [ edit | delete | rename ]
[FILE] crypt.py [ edit | delete | rename ]
[FILE] csv.py [ edit | delete | rename ]
[FILE] dataclasses.py [ edit | delete | rename ]
[FILE] datetime.py [ edit | delete | rename ]
[FILE] decimal.py [ edit | delete | rename ]
[FILE] difflib.py [ edit | delete | rename ]
[FILE] dis.py [ edit | delete | rename ]
[FILE] doctest.py [ edit | delete | rename ]
[FILE] enum.py [ edit | delete | rename ]
[FILE] filecmp.py [ edit | delete | rename ]
[FILE] fileinput.py [ edit | delete | rename ]
[FILE] fnmatch.py [ edit | delete | rename ]
[FILE] fractions.py [ edit | delete | rename ]
[FILE] ftplib.py [ edit | delete | rename ]
[FILE] functools.py [ edit | delete | rename ]
[FILE] genericpath.py [ edit | delete | rename ]
[FILE] getopt.py [ edit | delete | rename ]
[FILE] getpass.py [ edit | delete | rename ]
[FILE] gettext.py [ edit | delete | rename ]
[FILE] glob.py [ edit | delete | rename ]
[FILE] graphlib.py [ edit | delete | rename ]
[FILE] gzip.py [ edit | delete | rename ]
[FILE] hashlib.py [ edit | delete | rename ]
[FILE] heapq.py [ edit | delete | rename ]
[FILE] hmac.py [ edit | delete | rename ]
[FILE] imaplib.py [ edit | delete | rename ]
[FILE] imghdr.py [ edit | delete | rename ]
[FILE] imp.py [ edit | delete | rename ]
[FILE] inspect.py [ edit | delete | rename ]
[FILE] io.py [ edit | delete | rename ]
[FILE] ipaddress.py [ edit | delete | rename ]
[FILE] keyword.py [ edit | delete | rename ]
[FILE] LICENSE.txt [ edit | delete | rename ]
[FILE] linecache.py [ edit | delete | rename ]
[FILE] locale.py [ edit | delete | rename ]
[FILE] lzma.py [ edit | delete | rename ]
[FILE] mailbox.py [ edit | delete | rename ]
[FILE] mailcap.py [ edit | delete | rename ]
[FILE] mimetypes.py [ edit | delete | rename ]
[FILE] modulefinder.py [ edit | delete | rename ]
[FILE] netrc.py [ edit | delete | rename ]
[FILE] nntplib.py [ edit | delete | rename ]
[FILE] ntpath.py [ edit | delete | rename ]
[FILE] nturl2path.py [ edit | delete | rename ]
[FILE] numbers.py [ edit | delete | rename ]
[FILE] opcode.py [ edit | delete | rename ]
[FILE] operator.py [ edit | delete | rename ]
[FILE] optparse.py [ edit | delete | rename ]
[FILE] os.py [ edit | delete | rename ]
[FILE] pathlib.py [ edit | delete | rename ]
[FILE] pdb.py [ edit | delete | rename ]
[FILE] pickle.py [ edit | delete | rename ]
[FILE] pickletools.py [ edit | delete | rename ]
[FILE] pipes.py [ edit | delete | rename ]
[FILE] pkgutil.py [ edit | delete | rename ]
[FILE] platform.py [ edit | delete | rename ]
[FILE] plistlib.py [ edit | delete | rename ]
[FILE] poplib.py [ edit | delete | rename ]
[FILE] posixpath.py [ edit | delete | rename ]
[FILE] pprint.py [ edit | delete | rename ]
[FILE] profile.py [ edit | delete | rename ]
[FILE] pstats.py [ edit | delete | rename ]
[FILE] pty.py [ edit | delete | rename ]
[FILE] pyclbr.py [ edit | delete | rename ]
[FILE] pydoc.py [ edit | delete | rename ]
[FILE] py_compile.py [ edit | delete | rename ]
[FILE] queue.py [ edit | delete | rename ]
[FILE] quopri.py [ edit | delete | rename ]
[FILE] random.py [ edit | delete | rename ]
[FILE] re.py [ edit | delete | rename ]
[FILE] reprlib.py [ edit | delete | rename ]
[FILE] rlcompleter.py [ edit | delete | rename ]
[FILE] runpy.py [ edit | delete | rename ]
[FILE] sched.py [ edit | delete | rename ]
[FILE] secrets.py [ edit | delete | rename ]
[FILE] selectors.py [ edit | delete | rename ]
[FILE] shelve.py [ edit | delete | rename ]
[FILE] shlex.py [ edit | delete | rename ]
[FILE] shutil.py [ edit | delete | rename ]
[FILE] signal.py [ edit | delete | rename ]
[FILE] site.py [ edit | delete | rename ]
[FILE] sitecustomize.py [ edit | delete | rename ]
[FILE] smtpd.py [ edit | delete | rename ]
[FILE] smtplib.py [ edit | delete | rename ]
[FILE] sndhdr.py [ edit | delete | rename ]
[FILE] socket.py [ edit | delete | rename ]
[FILE] socketserver.py [ edit | delete | rename ]
[FILE] sre_compile.py [ edit | delete | rename ]
[FILE] sre_constants.py [ edit | delete | rename ]
[FILE] sre_parse.py [ edit | delete | rename ]
[FILE] ssl.py [ edit | delete | rename ]
[FILE] stat.py [ edit | delete | rename ]
[FILE] statistics.py [ edit | delete | rename ]
[FILE] string.py [ edit | delete | rename ]
[FILE] stringprep.py [ edit | delete | rename ]
[FILE] struct.py [ edit | delete | rename ]
[FILE] subprocess.py [ edit | delete | rename ]
[FILE] sunau.py [ edit | delete | rename ]
[FILE] symtable.py [ edit | delete | rename ]
[FILE] sysconfig.py [ edit | delete | rename ]
[FILE] tabnanny.py [ edit | delete | rename ]
[FILE] tarfile.py [ edit | delete | rename ]
[FILE] telnetlib.py [ edit | delete | rename ]
[FILE] tempfile.py [ edit | delete | rename ]
[FILE] textwrap.py [ edit | delete | rename ]
[FILE] this.py [ edit | delete | rename ]
[FILE] threading.py [ edit | delete | rename ]
[FILE] timeit.py [ edit | delete | rename ]
[FILE] token.py [ edit | delete | rename ]
[FILE] tokenize.py [ edit | delete | rename ]
[FILE] trace.py [ edit | delete | rename ]
[FILE] traceback.py [ edit | delete | rename ]
[FILE] tracemalloc.py [ edit | delete | rename ]
[FILE] tty.py [ edit | delete | rename ]
[FILE] turtle.py [ edit | delete | rename ]
[FILE] types.py [ edit | delete | rename ]
[FILE] typing.py [ edit | delete | rename ]
[FILE] uu.py [ edit | delete | rename ]
[FILE] uuid.py [ edit | delete | rename ]
[FILE] warnings.py [ edit | delete | rename ]
[FILE] wave.py [ edit | delete | rename ]
[FILE] weakref.py [ edit | delete | rename ]
[FILE] webbrowser.py [ edit | delete | rename ]
[FILE] xdrlib.py [ edit | delete | rename ]
[FILE] zipapp.py [ edit | delete | rename ]
[FILE] zipfile.py [ edit | delete | rename ]
[FILE] zipimport.py [ edit | delete | rename ]
[FILE] _aix_support.py [ edit | delete | rename ]
[FILE] _bootsubprocess.py [ edit | delete | rename ]
[FILE] _collections_abc.py [ edit | delete | rename ]
[FILE] _compat_pickle.py [ edit | delete | rename ]
[FILE] _compression.py [ edit | delete | rename ]
[FILE] _distutils_system_mod.py [ edit | delete | rename ]
[FILE] _markupbase.py [ edit | delete | rename ]
[FILE] _osx_support.py [ edit | delete | rename ]
[FILE] _pydecimal.py [ edit | delete | rename ]
[FILE] _pyio.py [ edit | delete | rename ]
[FILE] _py_abc.py [ edit | delete | rename ]
[FILE] _sitebuiltins.py [ edit | delete | rename ]
[FILE] _strptime.py [ edit | delete | rename ]
[FILE] _sysconfigdata__linux_x86_64-linux-gnu.py [ edit | delete | rename ]
[FILE] _sysconfigdata__x86_64-linux-gnu.py [ edit | delete | rename ]
[FILE] _threading_local.py [ edit | delete | rename ]
[FILE] _weakrefset.py [ edit | delete | rename ]
[FILE] __future__.py [ edit | delete | rename ]
[FILE] __phello__.foo.py [ edit | delete | rename ]
Viewing: /snap/core22/2955/usr/lib/python3.10/pty.py
"""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."""
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."""
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:
# Establish a new session.
os.setsid()
os.close(master_fd)
# Slave becomes stdin/stdout/stderr of child.
os.dup2(slave_fd, STDIN_FILENO)
os.dup2(slave_fd, STDOUT_FILENO)
os.dup2(slave_fd, STDERR_FILENO)
if slave_fd > STDERR_FILENO:
os.close(slave_fd)
# Explicitly open the tty to make it become a controlling tty.
tmp_fd = os.open(os.ttyname(STDOUT_FILENO), os.O_RDWR)
os.close(tmp_fd)
else:
os.close(slave_fd)
# Parent and child process.
return pid, master_fd
def _writen(fd, data):
"""Write all the data to a descriptor."""
while data:
n = os.write(fd, data)
data = data[n:]
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)"""
fds = [master_fd, STDIN_FILENO]
while fds:
rfds, _wfds, _xfds = select(fds, [], [])
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.
else:
os.write(STDOUT_FILENO, data)
if STDIN_FILENO in rfds:
data = stdin_read(STDIN_FILENO)
if not data:
fds.remove(STDIN_FILENO)
else:
_writen(master_fd, data)
def spawn(argv, master_read=_read, stdin_read=_read):
"""Create a spawned process."""
if type(argv) == type(''):
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]