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#1 (**permalink**) 01-05-2008, 07:39 AM

I'm using select if I get an "errno==EINTR" on my return calling "connect".
It appears not working. I'm still getting a signal interrupt from my alarm
timeout, thusly call my function "catch_int" at bottom example.

Is this correct what I am doing when trying to connect and get
"errno==EINTR"?

Thank you,
JT

/* start alarm */
alarm_flag = 0;
alarm(conn_timeout);

/* try to connect */
conn_retval=connect(sock_id, (void *)&pin, sizeof(pin));

/* turn off alarm if it did not go off */
alarm(0);

if( alarm_flag == 1 )
{
if (errno == EINTR) /*pause until connection established*/
{

fd_set writefd;

do
{
FD_ZERO(&writefd);
FD_SET(sock_id,&writefd);
errno=0;
ret=select(sock_id+1,NULL,&writefd,NULL,NULL); /*wait forever*/

}while((ret<0 && errno==EINTR) || ret<1);

}

void catch_int(int sig_num){

if(errno!=EINTR)
{
errlog(0,"WARNING: caught exception handler - Ctrl-C");

keep_going = 0;
kill(getpid(),SIGKILL);
}

}

static void alarm_function(int signo) {
alarm_flag = 1;
}

#2 (**permalink**) 01-05-2008, 07:41 AM

jt wrote:
> I'm using select if I get an "errno==EINTR" on my return calling "connect".
> It appears not working. I'm still getting a signal interrupt from my alarm
> timeout, thusly call my function "catch_int" at bottom example.
>
> Is this correct what I am doing when trying to connect and get
> "errno==EINTR"?

I'd say repeat connect if it returns EINTR, or set socket to
non-blocking, and wait for connection in select: socket becames writable
when connection is established/failed (check getsockopt (SO_ERROR))

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