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File Name : popen_fork.py

import os
import signal

from . import util

__all__ = ['Popen']

#
# Start child process using fork
#

class Popen(object):
    method = 'fork'

def __init__(self, process_obj):
        util._flush_std_streams()
        self.returncode = None
        self.finalizer = None
        self._launch(process_obj)

def duplicate_for_child(self, fd):
        return fd

def poll(self, flag=os.WNOHANG):
        if self.returncode is None:
            try:
                pid, sts = os.waitpid(self.pid, flag)
            except OSError:
                # Child process not yet created. See #1731717
                # e.errno == errno.ECHILD == 10
                return None
            if pid == self.pid:
                self.returncode = os.waitstatus_to_exitcode(sts)
        return self.returncode

def wait(self, timeout=None):
        if self.returncode is None:
            if timeout is not None:
                from multiprocessing.connection import wait
                if not wait([self.sentinel], timeout):
                    return None
            # This shouldn't block if wait() returned successfully.
            return self.poll(os.WNOHANG if timeout == 0.0 else 0)
        return self.returncode

def _send_signal(self, sig):
        if self.returncode is None:
            try:
                os.kill(self.pid, sig)
            except ProcessLookupError:
                pass
            except OSError:
                if self.wait(timeout=0.1) is None:
                    raise

def terminate(self):
        self._send_signal(signal.SIGTERM)

def kill(self):
        self._send_signal(signal.SIGKILL)

def _launch(self, process_obj):
        code = 1
        parent_r, child_w = os.pipe()
        child_r, parent_w = os.pipe()
        self.pid = os.fork()
        if self.pid == 0:
            try:
                os.close(parent_r)
                os.close(parent_w)
                code = process_obj._bootstrap(parent_sentinel=child_r)
            finally:
                os._exit(code)
        else:
            os.close(child_w)
            os.close(child_r)
            self.finalizer = util.Finalize(self, util.close_fds,
                                           (parent_r, parent_w,))
            self.sentinel = parent_r

def close(self):
        if self.finalizer is not None:
            self.finalizer()

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/linksafe	0755	2026-02-08 11:41:40
..	dir	-	root/linksafe	0755	2026-02-08 11:41:40
__pycache__	dir	-	root/linksafe	0755	2026-02-08 11:41:40
dummy	dir	-	root/linksafe	0755	2026-02-08 11:41:40
__init__.py	text/x-script.python	916 B	root/linksafe	0644	2026-01-08 06:12:44
connection.py	text/x-script.python	40.43 KB	root/linksafe	0644	2026-01-08 06:12:44
context.py	text/x-script.python	11.4 KB	root/linksafe	0644	2026-01-08 06:12:44
forkserver.py	text/x-script.python	11.92 KB	root/linksafe	0644	2026-01-08 06:12:44
heap.py	text/x-script.python	11.35 KB	root/linksafe	0644	2026-01-08 06:12:44
managers.py	text/x-script.python	46.77 KB	root/linksafe	0644	2026-01-08 06:12:44
pool.py	text/x-script.python	31.99 KB	root/linksafe	0644	2026-01-08 06:12:44
popen_fork.py	text/x-script.python	2.32 KB	root/linksafe	0644	2026-01-08 06:12:44
popen_forkserver.py	text/x-script.python	2.18 KB	root/linksafe	0644	2026-01-08 06:12:44
popen_spawn_posix.py	text/x-script.python	1.98 KB	root/linksafe	0644	2026-01-08 06:12:44
popen_spawn_win32.py	text/x-script.python	4.41 KB	root/linksafe	0644	2026-01-08 06:12:44
process.py	text/x-script.python	11.85 KB	root/linksafe	0644	2026-01-08 06:12:44
queues.py	text/x-script.python	12.4 KB	root/linksafe	0644	2026-01-08 06:12:44
reduction.py	text/x-script.python	9.29 KB	root/linksafe	0644	2026-01-08 06:12:44
resource_sharer.py	text/x-script.python	5.02 KB	root/linksafe	0644	2026-01-08 06:12:44
resource_tracker.py	text/x-script.python	10.82 KB	root/linksafe	0644	2026-01-08 06:12:44
shared_memory.py	text/plain	18.03 KB	root/linksafe	0644	2026-01-08 06:12:44
sharedctypes.py	text/x-script.python	6.16 KB	root/linksafe	0644	2026-01-08 06:12:44
spawn.py	text/x-script.python	9.42 KB	root/linksafe	0644	2026-01-08 06:12:44
synchronize.py	text/x-script.python	11.98 KB	root/linksafe	0644	2026-01-08 06:12:44
util.py	text/x-script.python	13.93 KB	root/linksafe	0644	2026-01-08 06:12:44

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