Description of problem:

When accepting socket connections, cherrypy doesn't handle interrupted system
calls gracefully. This means that e.g. if a cherrypy application (e.g. a
TurboGears website) gets SIGSTOP and SIGCONT or the machine gets
suspended/resumed, it doesn't serve web pages anymore.

Version-Release number of selected component (if applicable):

python-cherrypy-2.2.1-6.fc7 (any version < 3.1.0 beta!)

How reproducible:
Easy

Steps to Reproduce:
1. Start a cherrypy app
2. Load one of its pages into the browser (works)
3. "kill -STOP ..." its processes
4. Try to load the same page into the browser

Actual results:
Browser hangs, traceback in app:

Exception in thread CPHTTPServer Thread-2:
Traceback (most recent call last):
  File "/usr/lib64/python2.5/threading.py", line 460, in __bootstrap
    self.run()
  File "/usr/lib64/python2.5/threading.py", line 440, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/python2.5/site-packages/cherrypy/_cpserver.py", line 114, in
_start_http
    self.httpserver.start()
  File "/usr/lib/python2.5/site-packages/cherrypy/_cpwsgiserver.py", line 319,
in start
    self.tick()
  File "/usr/lib/python2.5/site-packages/cherrypy/_cpwsgiserver.py", line 325,
in tick
    s, addr = self.socket.accept()
  File "/usr/lib64/python2.5/socket.py", line 167, in accept
    sock, addr = self._sock.accept()
error: (4, 'Interrupted system call')

Expected results:

Page gets served, no traceback in app.

Additional info:

Upstream Ticket is http://www.cherrypy.org/ticket/707