Bugs item #3392945, was opened at 2011-08-17 18:27
Message generated for change (Tracker Item Submitted) made by awlike
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Category: libcurl
Group: hang
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: qzy (awlike)
Assigned to: Daniel Stenberg (bagder)
Summary: curl_easy_perform hanged

Initial Comment:
I'm using libcurl 7.21.7 under Symbian S60 V5 with emulator. After building the library, i test the code from example 'httpcustomheader.c' and it hanged at curl_easy_perform.

I debugged it and found the problem is function Curl_socket_ready in file 'select.c'. The app executed the following code:

do {
    if(timeout_ms > 0) {
      pending_tv.tv_sec = pending_ms / 1000;
      pending_tv.tv_usec = (pending_ms % 1000) * 1000;
    }
    else if(!timeout_ms) {
      pending_tv.tv_sec = 0;
      pending_tv.tv_usec = 0;
    }
    r = select((int)maxfd + 1, &fds_read, &fds_write, &fds_err, ptimeout);
    if(r != -1)
      break;
    error = SOCKERRNO;
    if(error && error_not_EINTR)
      break;
    if(timeout_ms > 0) {
      pending_ms = timeout_ms - elapsed_ms;
      if(pending_ms <= 0)
        break;
    }
  } while(r == -1);

Unfortunately, the app run into a dead loop. Variable timeout_ms is 0 and function select() returnd -1.
Later i tested example 'htmltitle.c', it has the same problem.

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Received on 2011-08-17