The timeout stuff in the socket module does not work
correctly on Solaris. Here's a typical example:

import socket

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(("localhost", 9048))
s.listen(1)
s.settimeout(10)
conn, addr = s.accept()
print 'Connected by', addr
while 1:
    data = conn.recv(1024)
    if not data: break
    conn.send(data)
conn.close()

When connecting, I get this traceback:

Connected by ('127.0.0.1', 32866)
Traceback (most recent call last):
  File "foo.py", line 10, in ?
    data = conn.recv(1024)
socket.error: (11, 'Resource temporarily unavailable')

This is because Python treats the new socket object as
blocking (the timeout value is -1). However, in
Solaris, sockets returned from accept() inherits the
blocking property. So, because the listenting socket
was in non-blocking mode, the new connected socket will
be non-blocking as well. Since the timeout is -1,
internal_select will not call select. 

The solution to this problem is to explicitly set the
blocking mode on new socket objects. The attached patch
implements this.