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|
/*
ex: set tabstop=4 shiftwidth=4 autoindent:
+-------------------------------------------------------------------------+
| Copyright (C) 2004-2024 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 |
| |
+-------------------------------------------------------------------------+
| spine: 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 Spine. It was
written to handle specifically issues with the Solaris threading model in
version 2.8.
*/
#include "common.h"
#include "spine.h"
/*! \fn static void spine_signal_handler(int spine_signal)
* \brief interupts the os default signal handler as appropriate.
*
*/
static void spine_signal_handler(int spine_signal) {
signal(spine_signal, SIG_DFL);
set.exit_code = spine_signal;
/* variables for time display */
time_t nowbin;
struct tm now_time;
struct tm *now_ptr;
/* get time for poller_output table */
nowbin = time(&nowbin);
localtime_r(&nowbin,&now_time);
now_ptr = &now_time;
char *log_fmt = get_date_format();
char logtime[50];
strftime(logtime, 50, log_fmt, now_ptr);
switch (spine_signal) {
case SIGABRT:
fprintf(stderr, "%s FATAL: Spine Interrupted by Abort Signal\n", logtime);
break;
case SIGINT:
fprintf(stderr, "%s FATAL: Spine Interrupted by Console Operator\n", logtime);
break;
case SIGSEGV:
fprintf(stderr, "%s FATAL: Spine Encountered a Segmentation Fault\n", logtime);
#ifdef HAVE_EXECINFO_H
int row = 0;
char **exit_strings = NULL;
fprintf(stderr, "Generating backtrace...%ld line(s)...\n", set.exit_size);
if (set.exit_size) {
set.exit_size = backtrace(set.exit_stack, set.exit_size);
exit_strings = backtrace_symbols(set.exit_stack, set.exit_size);
if (exit_strings) {
for (row = 0; row < set.exit_size; row++) {
fprintf(stderr, "%3d: %s\n", row, exit_strings[row]);
}
free(exit_strings);
}
}
#endif
exit(1);
break;
case SIGBUS:
fprintf(stderr, "%s FATAL: Spine Encountered a Bus Error\n", logtime);
break;
case SIGFPE:
fprintf(stderr, "%s FATAL: Spine Encountered a Floating Point Exception\n", logtime);
break;
case SIGQUIT:
fprintf(stderr, "%s FATAL: Spine Encountered a Keyboard Quit Command\n", logtime);
break;
case SIGPIPE:
fprintf(stderr, "%s FATAL: Spine Encountered a Broken Pipe\n", logtime);
break;
default:
fprintf(stderr, "%s FATAL: Spine Encountered An Unhandled Exception Signal Number: '%d'\n", logtime, spine_signal);
break;
}
}
static int spine_fatal_signals[] = {
SIGINT,
SIGPIPE,
SIGSEGV,
SIGBUS,
SIGFPE,
SIGQUIT,
SIGSYS,
SIGABRT,
0
};
/*! \fn void install_spine_signal_handler(void)
* \brief installs the spine signal handler to stop certain calls from
* abending Spine.
*
*/
void install_spine_signal_handler(void) {
/* Set a handler for any fatal signal not already handled */
int i;
struct sigaction sa;
void (*ohandler)(int);
for (i=0; spine_fatal_signals[i]; ++i) {
sigaction(spine_fatal_signals[i], NULL, &sa);
if (sa.sa_handler == SIG_DFL) {
sa.sa_handler = spine_signal_handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
sigaction(spine_fatal_signals[i], &sa, NULL);
}
}
for (i=0; spine_fatal_signals[i]; ++i) {
ohandler = signal(spine_fatal_signals[i], spine_signal_handler);
if (ohandler != SIG_DFL) {
signal(spine_fatal_signals[i], ohandler);
}
}
return;
}
/*! \fn void uninstall_spine_signal_handler(void)
* \brief uninstalls the spine signal handler.
*
*/
void uninstall_spine_signal_handler(void) {
/* Remove a handler for any fatal signal handled */
int i;
struct sigaction sa;
void (*ohandler)(int);
for (i=0; spine_fatal_signals[i]; ++i) {
sigaction(spine_fatal_signals[i], NULL, &sa);
if (sa.sa_handler == spine_signal_handler) {
sa.sa_handler = SIG_DFL;
sigaction(spine_fatal_signals[i], &sa, NULL);
}
}
for ( i=0; spine_fatal_signals[i]; ++i ) {
ohandler = signal(spine_fatal_signals[i], SIG_DFL);
if (ohandler != spine_signal_handler) {
signal(spine_fatal_signals[i], ohandler);
}
}
}
|
