RE: poll() emulation in git

From: Paolo Bonzini [mailto:paolo.bonzini@gmail.com] On Behalf Of Paolo Bonzini
Sent: Wednesday, September 05, 2012 2:05 PM
To: Joachim Schmitz
Cc: 'Junio C Hamano'; git@vger.kernel.org; 'Erik Faye-Lund'; bug-gnulib@gnu.org
Subject: Re: poll() emulation in git

Il 05/09/2012 13:24, Joachim Schmitz ha scritto:

quoted

However: this poll implementation, while compiling OK, doesn't work properly.
Because it uses recv(...,MSG_PEEK), it works on sockets only (returns ENOTSOCK on anything else), while the real poll() works on

all

quoted

kind if file descriptors, at least that is my understanding.

Actually recv(...,MSG_PEEK) on most Unix variants works on non-sockets
too.  The trick is taken from GNU Pth in turn.

quoted

Here on HP NonStop, when being connected via an non-interactive SSH, we get a set of pipes (stdin, stdout, stderr) instead of a
socket to talk to, so the poll() just hangs/loops.

Does your system have a working FIONREAD ioctl for pipes?

It does have FIONREAD ioctl. Whether it works properly is to be determined...
I'll test if you could show me how?


Bye, Jojo