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/**********************************************************************
* vanessa_socket_handler.c March 2002
* Simon Horman horms@verge.net.au
*
* Signal handlers
*
* vanessa_socket
* Library to simplify handling of TCP sockets
* Copyright (C) 1999-2008 Simon Horman <horms@verge.net.au>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*
**********************************************************************/
#include "vanessa_socket.h"
/**********************************************************************
* vanessa_socket_handler_reaper
* A signal handler that waits for a signal and runs wait3 to free
* the resources of any exited children. This stops zombie processes
* from hanging around. Designed to listen for SIGCHLD
* pre: sig: signal is recieved by the process
* post: Resources of any exited children are freed
* Signal handler for sig reset
**********************************************************************/
void vanessa_socket_handler_reaper(int sig)
{
int status;
extern unsigned int noconnection;
signal(sig, (void (*)(int)) vanessa_socket_handler_reaper);
while (wait3(&status, WNOHANG, 0) > 0) {
noconnection--;
}
}
/**********************************************************************
* vanessa_socket_handler_noop
* A signal handler that does nothing but reinstall itself
* as the signal handler for the signal.
* pre: sig: signal recieved by the process
* post: signal handler reset for signal
**********************************************************************/
void vanessa_socket_handler_noop(int sig)
{
signal(sig, (void (*)(int)) vanessa_socket_handler_noop);
}
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