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actions	-	Open
__pycache__	-	Open
connections.py	9.48 MB	View DL Edit
i18n.py	1.73 MB	View DL Edit
nonblocking.py	2.37 MB	View DL Edit
rhnLockfile.py	3.35 MB	View DL Edit
rpclib.py	23.68 MB	View DL Edit
SmartIO.py	2.11 MB	View DL Edit
SSL.py	10.79 MB	View DL Edit
tb.py	836 B	View DL Edit
transports.py	31.18 MB	View DL Edit
UserDictCase.py	2.96 MB	View DL Edit
__init__.py	132 B	View DL Edit

Edit file: /lib/python3.9/site-packages/rhn/nonblocking.py

#
#
#

import select
import fcntl
import os

class NonBlockingFile:
    def __init__(self, fd):
        # Keep a copy of the file descriptor
        self.fd = fd
        fcntl.fcntl(self.fd.fileno(), fcntl.F_SETFL, os.O_NDELAY)
        # Set the callback-related stuff
        self.read_fd_set = []
        self.write_fd_set = []
        self.exc_fd_set = []
        self.user_data = None
        self.callback = None

def set_callback(self, read_fd_set, write_fd_set, exc_fd_set,
            user_data, callback):
        self.read_fd_set = read_fd_set
        # Make the objects non-blocking
        for f in self.read_fd_set:
            fcntl.fcntl(f.fileno(), fcntl.F_SETFL, os.O_NDELAY)

self.write_fd_set = write_fd_set
        self.exc_fd_set = exc_fd_set
        self.user_data = user_data
        self.callback = callback

def read(self, amt=0):
        while 1:
            status_changed = 0
            readfds = self.read_fd_set + [self.fd]
            writefds = self.write_fd_set
            excfds = self.exc_fd_set
            print("Calling select", readfds)
            readfds, writefds, excfds = select.select(readfds, writefds, excfds)
            print("Select returned", readfds, writefds, excfds)
            if self.fd in readfds:
                # Our own file descriptor has changed status
                # Mark this, but also try to call the callback with the rest
                # of the file descriptors that changed status
                status_changed = 1
                readfds.remove(self.fd)
            if self.callback and (readfds or writefds or excfds):
                self.callback(readfds, writefds, excfds, self.user_data)
            if status_changed:
                break
        print("Returning")
        return self.fd.read(amt)

def write(self, data):
        return self.fd.write(data)

def __getattr__(self, name):
        return getattr(self.fd, name)

def callback(r, w, e, user_data):
    print("Callback called", r, w, e)
    print(r[0].read())

if __name__ == '__main__':
    import socket

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.connect(("localhost", 5555))
    f = s.makefile()
    ss = NonBlockingFile(f)

s2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s2.connect(("localhost", 5556))
    f = s2.makefile()
    ss.set_callback([f], [], [], None, callback)

xx = ss.read()
    print(len(xx))

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