def spawn_child(self, conn=None):
parent_fd, child_fd = passfd.socketpair(socket.AF_UNIX,
socket.SOCK_STREAM)
# make child fd non-blocking
flags = fcntl.fcntl(child_fd, fcntl.F_GETFL, 0)
fcntl.fcntl(child_fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
pid = os.fork()
if pid == 0:
if conn:
conn.close() # in the midst of handling a request, close
# the connection in the child
os.close(child_fd)
self.handler_class(parent_fd).serve()
sys.exit(0)
else:
os.close(parent_fd)
self.children.append(Child(pid, child_fd))
def spawn_child(self, session_id, conn=None):
parent_fd, child_fd = passfd.socketpair(socket.AF_UNIX,
socket.SOCK_STREAM)
# make child fd non-blocking
flags = fcntl.fcntl(child_fd, fcntl.F_GETFL, 0)
fcntl.fcntl(child_fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
pid = os.fork()
if pid == 0:
if conn is not None:
conn.close() # in the midst of handling a request, close
# the connection in the child
os.close(child_fd)
self.socket.close()
for child in self.children.values():
child.close()
self.handler_class(parent_fd).serve()
sys.exit(0)
else:
os.close(parent_fd)
self.children[session_id] = child = Child(session_id, pid,
child_fd)
log('started child (session=%s pid=%s nchild=%s)' %
(session_id, pid, len(self.children)))
return child
#!/usr/bin/env python3
#
import os, sys, socket
from scgi import passfd
import tempfile
#
# Create a pipe for sending the fd.
#
rfd, wfd = passfd.socketpair(socket.AF_UNIX, socket.SOCK_STREAM)
print("rfd", rfd, "wfd", wfd)
# We will pass this to the child
fileObj = tempfile.TemporaryFile()
line = b'Hello world!\n'
fileObj.write(line)
fileObj.flush()
fileObj.seek(0)
#
# fork() off!
#
pid = os.fork()
if pid != 0:
# We're in the parent.
# ioctl() will only pass raw filedescriptors. Find fd of fileObj.