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Re: AIX multithreaded issue - CURLE_COULDNT_CONNECT

From: Joseph Anto Smith <>
Date: Mon, 7 Jun 2004 06:17:17 -0500 (CDT)

----- Original Message -----
On Sun, 6 Jun 2004, Joseph Anto Smith Stanley wrote:

> I am having exactly the same problem as described in that post. When
using libcurl with a multi threaded program, fetching http files
*always* returns CURLE_COULDNT_CONNECT.

... and it works when you're not doing it multi-threaded?

Yes, it works fine with non- multi-threaded programs.

> The OS version I am using is AIX 5.2 and libcurl version is 7.12.0

> In fact, I even tried with the multithread.c file present in the
docs/examples folder of curl distribution. Could I get some help here?

The last time I touched an AIX box, it used AIX v3! ;-) (in nostalgic
moments, I show people the little pin I got while being an IBM employee,
saying "/aix/wizard" !)

I can only suggest that you first track down what exact function call(s)
that fails (using strace-style, debugger or printf-style debugging). Then
you check why it fails and if libcurl uses the proper threadsafe version

I should have included the details earlier... The exact funtion is connect
in connect.c The funny thing is connect returns -1 indicating it failed
but the errno is not set. I suppose this has something to do with threads
and I am stuck in how to proceed further with the debugging.

Thanks again,

     Daniel Stenberg -- --
      Dedicated custom curl help for hire:
Received on 2004-06-07