----- Original Message -----
From: "Andy Hobbs" <andy_at_hobbs.uk.net>
To: "libcurl development" <curl-library_at_cool.haxx.se>
Sent: Monday, October 25, 2004 6:55 PM
Subject: Re: connect failed if set socket non-blocking,why?

> Hi
>
> Are you using threads?
   Yes, I am using threads.
>
> if so are you using thread safe errno? you need to specify
>
> _REENTRANT
> and
> _LIBC_REENTRANT
>
> when compiling
>
u mean compile my program or compile the curl?
Where should i add the compile option of _REENTRANT and _LIBC_REENTRANT?

> Here is a section of my code that handles this:
>
>
> if ((n = connect(sockfd, (struct sockaddr *) saptr, salen)) < 0)
> {
> if (errno != EINPROGRESS)
> {
> errprint("sockError after connect %d, tid %d", errno,
> pthread_self());
> close(sockfd);
> if (sockError == EINTR)
> sockError = ETIMEDOUT;
> }
> else
> {
> // Call select to wait for writability or timeout or error
> // use getsockopt to find any errors from select
> select(sockfd + 1, NULL, &wrset, NULL, &timeout);
>
> // The descriptor should now be writable unless there was a
> timeout
> len = sizeof(sockError);
> getsockopt(sockfd, SOL_SOCKET, SO_ERROR, &sockError, &len);
>
> if (sockError != 0)
> errprint("sockError %d not 0 %d, %d", sockfd, sockError,
> errno);
>
> n = sockError;
> }
> }
>
>
> Andy
>
>
>
> On Mon, 2004-10-25 at 11:17, 黄志军 wrote:
> > ----- Original Message -----
> > From: "Andy Hobbs" <andy_at_hobbs.uk.net>
> > To: "libcurl development" <curl-library_at_cool.haxx.se>
> > Sent: Monday, October 25, 2004 5:45 PM
> > Subject: Re: connect failed if set socket non-blocking,why?
> >
> >
> > > Hi,
> > >
> > > connect returns instantly when the socket is non-blocking, you need to
> > > call select() and wait for the connect to complete.
> >
> > connect return value is -1 ,but errno is also 0, that is the key reason puzzling me.
> > >
> > > Andy
> > >
> > >
> > > On Mon, 2004-10-25 at 09:57, 黄志军 wrote:
> > > > I link my program with static library libcurl.a and find it always
> > > > return CURLE_COULDNT_CONNECT.
> > > >
> > > > if i ignore function Curl_nonblock() in connect.c( curl-7.12.2), the
> > > > curl_easy_perform return success and works fine.
> > > >
> > > > But if set socket to non-blocking, the connect() return -1(rc = -1)
> > > >
> > > > and i got the following info: "errno in curl=0" and "errno out
> > > > curl=150", why?
> > > >
> > > >
> > > > /*../lib/connect.c*/
> > > > /* set socket non-blocking */
> > > > Curl_nonblock(sockfd, TRUE);
> > > >
> > > > rc = connect(sockfd, ai->ai_addr, ai->ai_addrlen);
> > > >
> > > > fprintf(stderr, "errno in curl=%d\n", errno);
> > > >
> > > > if(-1 == rc) {
> > > > error = Curl_ourerrno();
> > > > fprintf(stderr, "errno in curl=%d\n", errno);
> > > >
> > > >
> > > > /*my multi-thread program:*/
> > > > curl_easy_perform(curl);
> > > > fprintf(stderr, "errno out curl=%d\n", errno);
> > > >
> > > --
> > > Andy Hobbs <andy_at_hobbs.uk.net>
> > >
> --
> Andy Hobbs <andy_at_hobbs.uk.net>
>
Received on 2004-10-25