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popen_spawn_posix.py

import io
import os

from .context import reduction, set_spawning_popen
from . import popen_fork
from . import spawn
from . import util

__all__ = ['Popen']

#
# Wrapper for an fd used while launching a process
#

class _DupFd(object):
    def __init__(self, fd):
        self.fd = fd
    def detach(self):
        return self.fd

#
# Start child process using a fresh interpreter
#

class Popen(popen_fork.Popen):
    method = 'spawn'
    DupFd = _DupFd

def __init__(self, process_obj):
        self._fds = []
        super().__init__(process_obj)

def duplicate_for_child(self, fd):
        self._fds.append(fd)
        return fd

def _launch(self, process_obj):
        from . import resource_tracker
        tracker_fd = resource_tracker.getfd()
        self._fds.append(tracker_fd)
        prep_data = spawn.get_preparation_data(process_obj._name)
        fp = io.BytesIO()
        set_spawning_popen(self)
        try:
            reduction.dump(prep_data, fp)
            reduction.dump(process_obj, fp)
        finally:
            set_spawning_popen(None)

parent_r = child_w = child_r = parent_w = None
        try:
            parent_r, child_w = os.pipe()
            child_r, parent_w = os.pipe()
            cmd = spawn.get_command_line(tracker_fd=tracker_fd,
                                         pipe_handle=child_r)
            self._fds.extend([child_r, child_w])
            self.pid = util.spawnv_passfds(spawn.get_executable(),
                                           cmd, self._fds)
            self.sentinel = parent_r
            with open(parent_w, 'wb', closefd=False) as f:
                f.write(fp.getbuffer())
        finally:
            fds_to_close = []
            for fd in (parent_r, parent_w):
                if fd is not None:
                    fds_to_close.append(fd)
            self.finalizer = util.Finalize(self, util.close_fds, fds_to_close)

for fd in (child_r, child_w):
                if fd is not None:
                    os.close(fd)

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	0/976	0755	2025-08-02 02:07:59
..	dir	-	0/976	0755	2025-08-02 02:07:59
__pycache__	dir	-	0/976	0755	2025-08-02 02:07:59
dummy	dir	-	0/976	0755	2025-08-02 02:07:59
__init__.py	text/x-script.python	916 B	0/976	0644	2025-06-03 06:38:25
connection.py	text/x-script.python	31.64 KB	0/976	0644	2025-06-03 06:38:25
context.py	text/x-script.python	11.33 KB	0/976	0644	2025-06-03 06:38:25
forkserver.py	text/x-script.python	11.85 KB	0/976	0644	2025-06-03 06:38:25
heap.py	text/x-script.python	11.35 KB	0/976	0644	2025-06-03 06:38:25
managers.py	text/x-script.python	46.57 KB	0/976	0644	2025-06-03 06:38:25
pool.py	text/x-script.python	31.99 KB	0/976	0644	2025-06-03 06:38:25
popen_fork.py	text/x-script.python	2.32 KB	0/976	0644	2025-06-03 06:38:25
popen_forkserver.py	text/x-script.python	2.18 KB	0/976	0644	2025-06-03 06:38:25
popen_spawn_posix.py	text/x-script.python	1.98 KB	0/976	0644	2025-06-03 06:38:25
popen_spawn_win32.py	text/x-script.python	4.41 KB	0/976	0644	2025-06-03 06:38:25
process.py	text/x-script.python	11.85 KB	0/976	0644	2025-06-03 06:38:25
queues.py	text/x-script.python	11.74 KB	0/976	0644	2025-06-03 06:38:25
reduction.py	text/x-script.python	9.29 KB	0/976	0644	2025-06-03 06:38:25
resource_sharer.py	text/x-script.python	5.02 KB	0/976	0644	2025-06-03 06:38:25
resource_tracker.py	text/x-script.python	10.09 KB	0/976	0644	2025-06-03 06:38:25
shared_memory.py	text/plain	18.03 KB	0/976	0644	2025-06-03 06:38:25
sharedctypes.py	text/x-script.python	6.16 KB	0/976	0644	2025-06-03 06:38:25
spawn.py	text/x-script.python	9.42 KB	0/976	0644	2025-06-03 06:38:25
synchronize.py	text/x-script.python	12 KB	0/976	0644	2025-06-03 06:38:25
util.py	text/x-script.python	13.93 KB	0/976	0644	2025-06-03 06:38:25

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