[haiku-development] Re: Bug in poll()?
- From: Ingo Weinhold <ingo_weinhold@xxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Sat, 15 Aug 2009 15:58:45 +0200
On 2009-08-14 at 23:38:31 [+0200], Armando Camarero <arcepi@xxxxxxxxxx>
wrote:
> I'm trying to compile libmsn in Haiku (to build a native MSN
> Messenger client for Haiku). With help from people on the IRC I got to
> compile it, but now I might have hit a bug in Haiku. Libmsn uses poll()
> to manage the sockets and it doesn't seem to work right. I've read the
> poll() manpage of FreeBSD (I think that Haiku implements BSD
> compatibility instead of Linux) and it should work as in Linux.
Haiku usually tries to follow POSIX, i.e. in this case:
http://www.opengroup.org/onlinepubs/9699919799/functions/poll.html
> I attach a simple C program which triggers the error. That program
> on Linux fetches the index page at www.arcepi.net and prints it on the
> terminal. On Haiku poll() marks the socket as POLLNVAL instead.
Your program polls two FDs, the second one being -1. Since that is an
invalid FD, Haiku correctly sets POLLNVAL for it. I'd say Linux is
non-conforming in this respect.
CU, Ingo
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