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/ usr / lib / python3.6 / site-packages / rhn /

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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))

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	drwxr-xr-x	2024-11-01 11:30:32
..	dir	-	root/root	drwxr-xr-x	2024-10-08 05:01:57
__pycache__	dir	-	root/root	drwxr-xr-x	2024-10-08 05:01:57
actions	dir	-	root/root	drwxr-xr-x	2024-11-19 06:02:24
SSL.py	text/x-script.python	10.79 KB	root/root	-rw-r--r--	2024-09-17 10:10:54
SmartIO.py	text/x-script.python	2.11 KB	root/root	-rw-r--r--	2018-02-19 08:18:29
UserDictCase.py	text/x-script.python	2.96 KB	root/root	-rw-r--r--	2018-02-19 08:18:29
__init__.py	text/plain	132 B	root/root	-rw-r--r--	2018-02-19 08:18:29
connections.py	text/x-script.python	9.48 KB	root/root	-rw-r--r--	2024-09-17 10:10:54
i18n.py	text/x-script.python	1.73 KB	root/root	-rw-r--r--	2018-02-19 08:18:29
nonblocking.py	text/x-script.python	2.37 KB	root/root	-rw-r--r--	2018-02-19 08:18:29
rhnLockfile.py	text/x-script.python	3.35 KB	root/root	-rw-r--r--	2018-02-19 08:18:29
rpclib.py	text/x-script.python	23.73 KB	root/root	-rw-r--r--	2024-09-17 10:10:55
tb.py	text/x-script.python	836 B	root/root	-rw-r--r--	2018-02-19 08:18:29
transports.py	text/x-script.python	31.23 KB	root/root	-rw-r--r--	2024-09-17 10:10:55