static void
do_wait(globalstate *gstate)
{
struct timeval wait;
double2tv(&wait, gstate->delay);
select(0, NULL, NULL, NULL, &wait);
}
/* start timer in special interval */
int start_timer( double interval )
{
struct itimerval itv;
if( interval <= EPSINON )
{
msg_log( L_ERR,
"%s: timer interval is zero\n",
__func__);
return -1;
}
double2tv( &itv.it_interval, interval );
bcopy( &itv.it_interval, &itv.it_value, sizeof( struct timeval ) );
//msg_log( L_ERR, "%d.%d\n", sec, usec );
/*
* start a ITIMER_REAL timer.
* ITIMER_VIRTUAL and ITIMER_PROF timer is not update its value
* when this process is not run by CPU,
* and if we call resvmsg then CPU queue this process in block-state,
* until packet come and change to running -state.
* so ITIMER_VIRTUAL and ITIMER_PROF timer will not expire when we expected
*/
if( setitimer( ITIMER_REAL, &itv, NULL ) == -1 )
{
msg_log( L_ERR,
"%s: %s\n",
__func__,
strerror(errno) );
return -1;
}
return 0;
}
static void
do_command(globalstate *gstate)
{
int status;
struct timeval wait = {0, 0};
struct timeval now;
fd_set readfds;
unsigned char ch;
/* calculate new refresh time */
gstate->refresh = gstate->now;
double2tv(&now, gstate->delay);
timeradd(&now, &gstate->refresh, &gstate->refresh);
time_get(&now);
/* loop waiting for time to expire */
do {
/* calculate time to wait */
if (gstate->delay > 0)
{
wait = gstate->refresh;
wait.tv_usec -= now.tv_usec;
if (wait.tv_usec < 0)
{
wait.tv_usec += 1000000;
wait.tv_sec--;
}
wait.tv_sec -= now.tv_sec;
}
/* set up arguments for select on stdin (0) */
FD_ZERO(&readfds);
FD_SET(STDIN_FILENO, &readfds);
/* wait for something to read or time out */
if (select(32, &readfds, NULL, NULL, &wait) > 0)
{
/* read it */
if (read(STDIN_FILENO, &ch, 1) != 1)
{
/* read error */
message_error(" Read error on stdin");
quit(EX_DATAERR);
/*NOTREACHED*/
}
/* mark pending messages as old */
message_mark();
/* dispatch */
status = command_process(gstate, (int)ch);
switch(status)
{
case CMD_ERROR:
quit(EX_SOFTWARE);
/*NOTREACHED*/
case CMD_REFRESH:
return;
case CMD_UNKNOWN:
message_error(" Unknown command");
break;
case CMD_NA:
message_error(" Command not available");
}
}
/* get new time */
time_get(&now);
} while (timercmp(&now, &(gstate->refresh), < ));
}
