bug#1107: #1107 - 23.0.60; Emacs --daemon crashes when emacsclient tries to establish a connection on OS X - Emacs bug report logs

[Adrian Robert]

OK, it seems that the NS GUI stuff cannot be used in a child process  
from fork():

http://developer.apple.com/ReleaseNotes/CoreFoundation/CoreFoundation.html

(search for "fork"):

> Due to the behavior of fork(), CoreFoundation cannot be used on the  
> child-side of fork(). If you fork(), you must follow that with an  
> exec*() call of some sort, and you should not use CoreFoundation  
> APIs within the child, before the exec*().

I put in a really ugly hack that calls execve() in the child after the  
fork (which then means the daemonization has to be short-circuited the  
second time), and this works in all respects except:

The emacsclient must be given "--socket-name /tmp/emacs503/server" to  
find the server.  Else it gives "No socket or alternate editor."

On the other hand, if I start emacs -Q and run 'server-start', this  
argument is NOT needed, and furthermore if it IS given it, it fails  
with "connect: Connection refused".

Any insight into what is happening here?