Programming

I've a problem with a Solaris program implementation: My code uses a
timer procedure and when i try to execute date -a XXXX or rdate, my
aplication stops. I can't use ntp and need to set the machine time.
Here is my procedure. If you know how you can help me, please, do it.
static void handlerDelay() {
siglongjmp( env, 1 );
}

int XoPortUtilDelay( unsigned int milissec ) {

int houveTemporizacao = 0;
int segundos;
int microSeg;
struct itimerval tempoSleep;
void (*handlerAnterior)();

segundos = milissec / 1000;
microSeg = ( milissec % 1000 ) * 1000;

//!!!
if( microSeg < 50000 ){
microSeg = 50000;
}
//!!!

tempoSleep.it_value.tv_sec = segundos;
tempoSleep.it_value.tv_usec = microSeg;
tempoSleep.it_interval.tv_sec = 0;
tempoSleep.it_interval.tv_usec = 0;

handlerAnterior = signal( SIGALRM, handlerDelay );

if( handlerAnterior == SIG_ERR ){
return FALHA;
}

/* The first call to sigsetjmp show the point where the next
siglongjmp will return. Return always 0 at first time. When siglongjmp
is called (no signal handler), execution return to the call point to
sigsetjmp and the returned value are the specified as second argument
in siglongjmp. */

houveTemporizacao = sigsetjmp( env, 1 );

if( !houveTemporizacao ){
if( setitimer( ITIMER_REAL, &tempoSleep, NULL ) == -1 ){
return FALHA;
}
pause();
}

signal( SIGALRM, handlerAnterior );

return SUCESSO;
}//fim XoPorUtilDelay

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I just did It 'cause I need it immediatly