I wrote a Module upon INIT of the module
it starts a posix thread (w/ pthread_create), to Monitor some resource.
The thread-method is called (I know because I see
that logs to the snmpd.log) but once it "sleeps"
it then wakes and literally disappears. I never get
the "done sleeping for" or "MonitorMain: done sleep", or
"MonitorMain: exiting" messages.
Thanks for any insight/info.
-Joel
Here is the pertinent code:
in init:
pthread_t pvmMonitorThread=0;
int rc=0;
rc = pthread_create(&pvmMonitorThread, NULL, MonitorMain, (void
*)NULL);
if (rc){
my_snmp_log(LOG_ERR,"ERROR; return code from pthread_create()
is %d\n", rc);
}
int pvm_runMonitor=1; //set to zero by parent thread, when ready to
exit.
void *MonitorMain()
{
int last=-1;
my_snmp_log(LOG_INFO,"MonitorMain running\n");
while(pvm_runMonitor)
{
ret=check_pvm_server();
if(last!=ret)
{
if(ret==PVM_STATUS_DOWN)
{
//couldn't connect set status to DOWN
g_pvmStatus=PVM_STATUS_DOWN;
}
if(ret==PVM_STATUS_UP)
{
g_pvmStatus=PVM_STATUS_UP;
}
}
snmp_log(LOG_INFO,"MonitorMain: result is %d from check_server,
sleep
%d\n",ret,seconds);
//sleep won't work for pthreads (use nanosleep instead)
// sleep(seconds);
pvmSleep(seconds);
snmp_log(LOG_INFO,"MonitorMain: done sleep %d\n",ret);
last=ret;
}
snmp_log(LOG_INFO,"MonitorMain: exiting");
pthread_exit(NULL);
}
void pvmSleep(int seconds)
{
struct timespec sleepTime;
struct timespec remainingSleepTime;
sleepTime.tv_sec=seconds;
sleepTime.tv_nsec=0;
while(1){
snmp_log(LOG_INFO,"sleeping for %d sec\n",seconds);
nanosleep(&sleepTime,&remainingSleepTime);
snmp_log(LOG_INFO,"done sleeping for %d sec\n",seconds);
if(remainingSleepTime.tv_sec==0 &&
remainingSleepTime.tv_nsec==0)
{
break;
}
sleepTime.tv_sec=remainingSleepTime.tv_sec;
sleepTime.tv_nsec=remainingSleepTime.tv_nsec;
}
}
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