bug#6781: emacs server with X11 build on OSX

[YAMAMOTO Mitsuharu]

>>>>> On Wed, 04 Aug 2010 11:25:53 -0400, Chong Yidong <cyd@stupidchicken.com> 
>>>>> said:

> YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp> writes:
>> I suspect there is a bug in getaddrinfo on Mac OS X 10.6.4.  At
>> least, the behavior of the following program is incompatible with
>> that on Mac OS X 10.5.8.

> Could you write a PROBLEMS entry about your discovery?

I think it is more natural to specify NULL for the unspecified port
case, and it also works as a workaround.

                                     YAMAMOTO Mitsuharu
                                mituharu@math.s.chiba-u.ac.jp

=== modified file 'src/process.c'
*** src/process.c       2010-06-03 22:47:35 +0000
--- src/process.c       2010-09-25 03:52:03 +0000
***************
*** 3446,3452 ****
        /* SERVICE can either be a string or int.
         Convert to a C string for later use by getaddrinfo.  */
        if (EQ (service, Qt))
!       portstring = "0";
        else if (INTEGERP (service))
        {
          sprintf (portbuf, "%ld", (long) XINT (service));
--- 3446,3455 ----
        /* SERVICE can either be a string or int.
         Convert to a C string for later use by getaddrinfo.  */
        if (EQ (service, Qt))
!       /* We pass NULL for unspecified port, because some versions of
!          Darwin return EAI_NONAME for getaddrinfo ("localhost", "0",
!          ...).  */
!       portstring = NULL;
        else if (INTEGERP (service))
        {
          sprintf (portbuf, "%ld", (long) XINT (service));
***************
*** 3472,3482 ****
  
        ret = getaddrinfo (SDATA (host), portstring, &hints, &res);
        if (ret)
  #ifdef HAVE_GAI_STRERROR
!       error ("%s/%s %s", SDATA (host), portstring, gai_strerror(ret));
  #else
!       error ("%s/%s getaddrinfo error %d", SDATA (host), portstring, ret);
  #endif
        immediate_quit = 0;
  
        goto open_socket;
--- 3475,3493 ----
  
        ret = getaddrinfo (SDATA (host), portstring, &hints, &res);
        if (ret)
+       {
  #ifdef HAVE_GAI_STRERROR
!         if (portstring)
!           error ("%s/%s %s", SDATA (host), portstring, gai_strerror(ret));
!         else
!           error ("%s %s", SDATA (host), gai_strerror(ret));
  #else
!         if (portstring)
!           error ("%s/%s getaddrinfo error %d", SDATA (host), portstring, ret);
!         else
!           error ("%s getaddrinfo error %d", SDATA (host), ret);
  #endif
+       }
        immediate_quit = 0;
  
        goto open_socket;