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// $Id: sig.c 1 2005-6-13 3:17:17 PM Celestia $
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <time.h>
#include "../common/plugin.h"
#include "../common/version.h"
#include "../common/showmsg.h"
PLUGIN_INFO = {
"Signals",
PLUGIN_CORE,
"1.1",
PLUGIN_VERSION,
"Handles program signals"
};
PLUGIN_EVENTS_TABLE = {
{ "sig_init", "Plugin_Init" },
{ "sig_final", "Plugin_Final" },
{ NULL, NULL }
};
//////////////////////////////////////
#if defined(_WIN32) || defined(MINGW)
int sig_init() {
printf("This plugin is not supported - Enable 'exchndl' instead!");
return 0;
}
int sig_final() { return 0; }
#elif defined (__NETBSD__) || defined (__FREEBSD__)
int sig_init() {
printf("This plugin is not supported!");
return 0;
}
int sig_final() { return 0; }
#else
//////////////////////////////////////
#if !defined(CYGWIN)
#include <execinfo.h>
#endif
const char* (*getrevision)();
unsigned long (*getuptime)();
char *server_name;
int crash_flag = 0;
extern const char *strsignal(int);
int sig_final ();
// by Gabuzomeu
// This is an implementation of signal() using sigaction() for portability.
// (sigaction() is POSIX; signal() is not.) Taken from Stevens' _Advanced
// Programming in the UNIX Environment_.
//
#ifdef WIN32 // windows don't have SIGPIPE
#define SIGPIPE SIGINT
#endif
#ifndef POSIX
#define compat_signal(signo, func) signal(signo, func)
#else
sigfunc *compat_signal(int signo, sigfunc *func)
{
struct sigaction sact, oact;
sact.sa_handler = func;
sigemptyset(&sact.sa_mask);
sact.sa_flags = 0;
#ifdef SA_INTERRUPT
sact.sa_flags |= SA_INTERRUPT; /* SunOS */
#endif
if (sigaction(signo, &sact, &oact) < 0)
return (SIG_ERR);
return (oact.sa_handler);
}
#endif
/*=========================================
* Dumps the stack using glibc's backtrace
*-----------------------------------------
*/
#ifdef CYGWIN
#define FOPEN_ freopen
extern void cygwin_stackdump();
#else
#define FOPEN_(fn,m,s) fopen(fn,m)
#endif
void sig_dump(int sn)
{
FILE *fp;
char file[256];
int no = 0;
crash_flag = 1;
// search for a usable filename
do {
sprintf (file, "log/%s%04d.stackdump", server_name, ++no);
} while((fp = fopen(file,"r")) && (fclose(fp), no < 9999));
// dump the trace into the file
if ((fp = FOPEN_(file, "w", stderr)) != NULL) {
const char *revision;
#ifndef CYGWIN
void* array[20];
char **stack;
size_t size;
#endif
printf ("Dumping stack to '"CL_WHITE"%s"CL_RESET"'... ", file);
if ((revision = getrevision()) != NULL)
fprintf(fp, "Version: svn%s \n", revision);
else
fprintf(fp, "Version: %2d.%02d.%02d mod%02d \n", ATHENA_MAJOR_VERSION, ATHENA_MINOR_VERSION, ATHENA_REVISION, ATHENA_MOD_VERSION);
fprintf(fp, "Exception: %s \n", strsignal(sn));
fflush (fp);
#ifdef CYGWIN
cygwin_stackdump ();
#else
fprintf(fp, "Stack trace:\n");
size = backtrace (array, 20);
stack = backtrace_symbols (array, size);
for (no = 0; no < size; no++) {
fprintf(fp, "%s\n", stack[no]);
}
fprintf(fp,"End of stack trace\n");
free(stack);
#endif
printf ("Done.\n");
fflush(stdout);
fclose(fp);
}
sig_final(); // Log our uptime
// Pass the signal to the system's default handler
compat_signal(sn, SIG_DFL);
raise(sn);
}
/*=========================================
* Shutting down (Program did not crash ^^)
* - Log our current up time
*-----------------------------------------
*/
int sig_final ()
{
time_t curtime;
char curtime2[24];
FILE *fp;
long seconds = 0, day = 24*60*60, hour = 60*60,
minute = 60, days = 0, hours = 0, minutes = 0;
fp = fopen("log/uptime.log","a");
if (fp) {
time(&curtime);
strftime(curtime2, 24, "%m/%d/%Y %H:%M:%S", localtime(&curtime));
seconds = getuptime();
days = seconds/day;
seconds -= (seconds/day>0)?(seconds/day)*day:0;
hours = seconds/hour;
seconds -= (seconds/hour>0)?(seconds/hour)*hour:0;
minutes = seconds/minute;
seconds -= (seconds/minute>0)?(seconds/minute)*minute:0;
fprintf(fp, "%s: %s %s - %ld days, %ld hours, %ld minutes, %ld seconds.\n",
curtime2, server_name, (crash_flag ? "crashed" : "uptime"),
days, hours, minutes, seconds);
fclose(fp);
}
return 1;
}
/*=========================================
* Register the signal handlers
*-----------------------------------------
*/
int sig_init ()
{
void (*func) = sig_dump;
#ifdef CYGWIN // test if dumper is enabled
char *buf = getenv ("CYGWIN");
if (buf && strstr(buf, "error_start") != NULL)
func = SIG_DFL;
#endif
IMPORT_SYMBOL(server_name, 1);
IMPORT_SYMBOL(getrevision, 6);
IMPORT_SYMBOL(getuptime, 11);
compat_signal(SIGSEGV, func);
compat_signal(SIGFPE, func);
compat_signal(SIGILL, func);
#ifndef __WIN32
compat_signal(SIGBUS, func);
#endif
return 1;
}
#endif
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