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91.213.11.6

File Name : 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 semaphore_tracker
        tracker_fd = semaphore_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:
            if parent_r is not None:
                self.finalizer = util.Finalize(self, os.close, (parent_r,))
            for fd in (child_r, child_w, parent_w):
                if fd is not None:
                    os.close(fd)

System Information
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Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/linksafe	0755	2023-09-24 06:26:10
..	dir	-	root/linksafe	0755	2023-09-24 06:26:10
__pycache__	dir	-	root/linksafe	0755	2023-09-24 06:26:10
dummy	dir	-	root/linksafe	0755	2023-09-24 06:26:10
__init__.py	text/x-python	923 B	root/linksafe	0644	2023-02-06 10:21:37
connection.py	text/x-python	30.56 KB	root/linksafe	0644	2023-02-06 10:21:37
context.py	text/x-python	10.67 KB	root/linksafe	0644	2023-02-06 10:21:37
forkserver.py	text/x-python	12.11 KB	root/linksafe	0644	2023-02-06 10:21:37
heap.py	text/x-python	8.71 KB	root/linksafe	0644	2023-02-06 10:21:37
managers.py	text/x-python	40.02 KB	root/linksafe	0644	2023-02-06 10:21:37
pool.py	text/x-python	26.21 KB	root/linksafe	0644	2023-02-06 10:21:37
popen_fork.py	text/x-python	2.34 KB	root/linksafe	0644	2023-02-06 10:21:37
popen_forkserver.py	text/x-python	1.97 KB	root/linksafe	0644	2023-02-06 10:21:37
popen_spawn_posix.py	text/x-python	1.88 KB	root/linksafe	0644	2023-02-06 10:21:37
popen_spawn_win32.py	text/x-python	3.68 KB	root/linksafe	0644	2023-02-06 10:21:37
process.py	text/x-python	10.3 KB	root/linksafe	0644	2023-02-06 10:21:37
queues.py	text/x-python	11.32 KB	root/linksafe	0644	2023-02-06 10:21:37
reduction.py	text/x-python	9.14 KB	root/linksafe	0644	2023-02-06 10:21:37
resource_sharer.py	text/x-python	5.23 KB	root/linksafe	0644	2023-02-06 10:21:37
semaphore_tracker.py	text/x-python	5.34 KB	root/linksafe	0644	2023-02-06 10:21:37
sharedctypes.py	text/x-python	6.16 KB	root/linksafe	0644	2023-02-06 10:21:37
spawn.py	text/plain	8.64 KB	root/linksafe	0644	2023-02-06 10:21:37
synchronize.py	text/x-python	11.31 KB	root/linksafe	0644	2023-02-06 10:21:37
util.py	text/x-python	13.36 KB	root/linksafe	0644	2023-02-06 10:21:37