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Subject: get_osfhandle & WaitForSingleObject on a cygwin socket fd....
Date: Thu, 20 Dec 2007 18:01:34 -0800
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Hi

Please bear with me if this is a stupid question but I'm trying to setup a telnet socket
in cygwin and then want to use a Windows wait semaphore (WaitForMultipleObjects) 
to combine it with a sleep for winpcap HANDLEs. 

I thought I'd test this first though. 

Does get_osfhandle() on a AF_INET socket to the right thing? The WaitForSingleObject
below never wakes up (despite an incoming telnet connection). 

Thanks. 

main() {
  struct sockaddr_in sin;
  int s;
  int opt = 1;
  int ret;
  HANDLE h; 

  /* init server socket. */
  if ((s=socket(AF_INET, SOCK_STREAM, 0))< 0) {
    printf("%s: setsockopt! %s\n", __FUNCTION__, strerror(errno));
  }

  /* try to bind to port */
  memset(&sin, 0, sizeof(sin));
  sin.sin_family = AF_INET;
  sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); // only bind to loopback now
  sin.sin_port = htons(8081);
    
  if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
    return LP_ERR_SOCKET;
  }
   
  if (listen(s, LEAD_PIPE_MAX_CONN) < 0) {
    return LP_ERR_SOCKET;
  }
   
  h = (HANDLE) get_osfhandle(s);
  ASSERT(h> 0); 
  fprintf(stdout, "Waiting on telnet handle %x\n", h);
  while(1) {
      WaitForSingleObject(h, INFINITE);
      fprintf(stdout, "Awoke on telnet handle\n");
  } 
}
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