From:	Serguei DOT Dachian AT univ-lemans DOT fr (Serguei DACHIAN)
Subject:	fork and V and socket and Gnu-win32
16 Jun 1998 18:44:39 -0700 :
Message-ID:	<1.5.4.32.19980616103747.0067d2ec.cygnus.gnu-win32@lola.univ-lemans.fr>
Mime-Version:	1.0
To:	gnu-win32 AT cygnus DOT com

Hi everybody. I have some very peculiar problem, and i would really
appreciate any HELP.

I am using B19 + Sergey's coolview + EGCS + Gui library V (version 1.19). My
program has a simple GUI with two buttons "Start" and "Stop". The "Start"
button forks some child process which is an infinite loop working with
sockets. And the stop button just kill this child process. The problem is
the following: the child process dies dumping core immediatly after it is
forked. It occures really only in the setup "fork + V + socket +  Gnu-win32"
since it works well under Linux, it works well if the child process don't
use sockets and it works well if I don't fork and use sockets in the parent
process.

If any one can understand what's going on it will be great.

If it can help, here is a simplified fragment from my "WindowCommand" function

--------- BEGIN --------
case btnStartTool:
{
  if ((childpid = fork()) < 0) {
       MyError("Fork failed.");
  } else {
      if (childpid == 0) {
         while(1) {
           XXXXXX();
         }
      } else {
           YYYYYY();
      }
  }
  break;
}

case btnStopTool:
{
  kill(childpid,SIGKILL);
  ZZZZZZ();
  break;
}
--------- BEGIN --------

Here XXXXXX() is some function using sockets. The functions YYYYYY() and
ZZZZZZ() deals with V interface and as to my mind are used only by parent;
hence shey should not be important.

Thaks in advance for any help.

___________________________________________________________________________
Serguei DACHIAN
Laboratoire de Statistique et Processus,
Universite du Maine, Av. Olivier Messiaen
72085 Le Mans CEDEX 9, FRANCE
Tel.  : +33 (0)2 43 83 37 18
Fax.  : +33 (0)2 43 83 35 79
Email : Serguei DOT Dachian AT univ-lemans DOT fr
WWW   : http://www.univ-lemans.fr/sciences/statist/cvs/thesard.html#dachian

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