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|
/*
+-------------------------------------------------------------------------+
| Copyright (C) 2002-2006 The Cacti Group |
| |
| This program 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 2.1 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 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., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301, USA |
| |
+-------------------------------------------------------------------------+
| cactid: a backend data gatherer for cacti |
+-------------------------------------------------------------------------+
| This poller would not have been possible without: |
| - Larry Adams (current development and enhancements) |
| - Rivo Nurges (rrd support, mysql poller cache, misc functions) |
| - RTG (core poller code, pthreads, snmp, autoconf examples) |
| - Brady Alleman/Doug Warner (threading ideas, implimentation details) |
+-------------------------------------------------------------------------+
| - Cacti - http://www.cacti.net/ |
+-------------------------------------------------------------------------+
*/
/* These functions handle simple singal handling functions for Cactid. It was
written to handle specifically issues with the Solaris threading model in
version 2.8.
*/
#include "common.h"
#include "cactid.h"
/*! \fn static void cactid_signal_handler(int cactid_signal)
* \brief interupts the os default signal handler as appropriate.
*
*/
static void cactid_signal_handler(int cactid_signal) {
signal(cactid_signal, SIG_DFL);
set.exit_code = cactid_signal;
switch (cactid_signal) {
case SIGINT:
die("FATAL: Cactid Interrupted by Console Operator");
break;
case SIGSEGV:
die("FATAL: Cactid Encountered a Segmentation Fault");
break;
case SIGBUS:
die("FATAL: Cactid Encountered a Bus Error");
break;
case SIGFPE:
die("FATAL: Cactid Encountered a Floating Point Exception");
break;
case SIGQUIT:
die("FATAL: Cactid Encountered a Keyboard Quit Command");
break;
case SIGPIPE:
die("FATAL: Cactid Encountered a Broken Pipe");
break;
default:
die("FATAL: Cactid Encountered An Unhandled Exception Signal Number: '%d'", cactid_signal);
break;
}
}
static int cactid_fatal_signals[] = {
SIGINT,
SIGSEGV,
SIGBUS,
SIGFPE,
SIGQUIT,
0
};
/*! \fn void install_cactid_signal_handler(void)
* \brief installs the cactid signal handler to stop certain calls from
* abending Cactid.
*
*/
void install_cactid_signal_handler(void) {
/* Set a handler for any fatal signal not already handled */
int i;
struct sigaction action;
void (*ohandler)(int);
for ( i=0; cactid_fatal_signals[i]; ++i ) {
sigaction(cactid_fatal_signals[i], NULL, &action);
if ( action.sa_handler == SIG_DFL ) {
action.sa_handler = cactid_signal_handler;
sigaction(cactid_fatal_signals[i], &action, NULL);
}
}
for ( i=0; cactid_fatal_signals[i]; ++i ) {
ohandler = signal(cactid_fatal_signals[i], cactid_signal_handler);
if ( ohandler != SIG_DFL ) {
signal(cactid_fatal_signals[i], ohandler);
}
}
return;
}
/*! \fn void uninstall_cactid_signal_handler(void)
* \brief uninstalls the cactid signal handler.
*
*/
void uninstall_cactid_signal_handler(void) {
/* Remove a handler for any fatal signal handled */
int i;
struct sigaction action;
void (*ohandler)(int);
for ( i=0; cactid_fatal_signals[i]; ++i ) {
sigaction(cactid_fatal_signals[i], NULL, &action);
if ( action.sa_handler == cactid_signal_handler ) {
action.sa_handler = SIG_DFL;
sigaction(cactid_fatal_signals[i], &action, NULL);
}
}
for ( i=0; cactid_fatal_signals[i]; ++i ) {
ohandler = signal(cactid_fatal_signals[i], SIG_DFL);
if ( ohandler != cactid_signal_handler ) {
signal(cactid_fatal_signals[i], ohandler);
}
}
}
|
