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/**
* \file server/sig_handler.c
*
* \brief Signal handling dta and routines for fwknopd.
*/
/* Fwknop is developed primarily by the people listed in the file 'AUTHORS'.
* Copyright (C) 2009-2015 fwknop developers and contributors. For a full
* list of contributors, see the file 'CREDITS'.
*
* License (GNU General Public License):
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
*****************************************************************************
*/
#include "fwknopd_common.h"
#include "log_msg.h"
#include "sig_handler.h"
#if HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
sig_atomic_t got_signal = 0; /* General signal flag (break capture) */
sig_atomic_t got_sighup = 0; /* SIGHUP flag */
sig_atomic_t got_sigint = 0; /* SIGINT flag */
sig_atomic_t got_sigterm = 0; /* SIGTERM flag */
sig_atomic_t got_sigusr1 = 0; /* SIGUSR1 flag */
sig_atomic_t got_sigusr2 = 0; /* SIGUSR2 flag */
sig_atomic_t got_sigchld = 0; /* SIGCHLD flag */
sigset_t *csmask;
/* SIGHUP Handler
*/
void
sig_handler(int sig)
{
int o_errno;
got_signal = sig;
switch(sig) {
case SIGHUP:
got_sighup = 1;
return;
case SIGINT:
got_sigint = 1;
return;
case SIGTERM:
got_sigterm = 1;
return;
case SIGUSR1:
got_sigusr1 = 1;
return;
case SIGUSR2:
got_sigusr2 = 1;
return;
case SIGCHLD:
o_errno = errno; /* Save errno */
got_sigchld = 1;
waitpid(-1, NULL, WNOHANG);
errno = o_errno; /* restore errno (in case reset by waitpid) */
return;
}
}
/* Setup signal handlers
*/
int
set_sig_handlers(void)
{
int err = 0;
struct sigaction act;
/* Clear the signal flags.
*/
got_signal = 0;
got_sighup = 0;
got_sigint = 0;
got_sigterm = 0;
got_sigusr1 = 0;
got_sigusr2 = 0;
/* Setup the handlers
*/
act.sa_handler = sig_handler;
sigemptyset(&act.sa_mask);
act.sa_flags = SA_RESTART;
if(sigaction(SIGHUP, &act, NULL) < 0)
{
log_msg(LOG_ERR, "* Error setting SIGHUP handler: %s",
strerror(errno));
err++;
}
if(sigaction(SIGINT, &act, NULL) < 0)
{
log_msg(LOG_ERR, "* Error setting SIGINT handler: %s",
strerror(errno));
err++;
}
if(sigaction(SIGTERM, &act, NULL) < 0)
{
log_msg(LOG_ERR, "* Error setting SIGTERM handler: %s",
strerror(errno));
err++;
}
if(sigaction(SIGUSR1, &act, NULL) < 0)
{
log_msg(LOG_ERR, "* Error setting SIGUSR1 handler: %s",
strerror(errno));
err++;
}
if(sigaction(SIGUSR2, &act, NULL) < 0)
{
log_msg(LOG_ERR, "* Error setting SIGUSR2 handler: %s",
strerror(errno));
err++;
}
if(sigaction(SIGCHLD, &act, NULL) < 0)
{
log_msg(LOG_ERR, "* Error setting SIGCHLD handler: %s",
strerror(errno));
err++;
}
return(err);
}
int
sig_do_stop(void)
{
/* Any signal except USR1, USR2, and SIGCHLD mean break the loop.
*/
if(got_signal != 0)
{
if(got_sigint || got_sigterm || got_sighup)
{
return 1;
}
else if(got_sigusr1 || got_sigusr2)
{
/* Not doing anything with these yet.
*/
got_sigusr1 = got_sigusr2 = 0;
got_signal = 0;
}
else
got_signal = 0;
}
return 0;
}
/***EOF***/
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