On Fri, 7 Oct 2011, Michael Kerrisk wrote: > Lukas, > > On Mon, Aug 29, 2011 at 2:26 PM, Lukas Czerner <lczerner@xxxxxxxxxx> wrote: > > When dealing with sockets, we have to be sure that there is no recv > > still blocking on it on another thread, otherwise it might block forever, > > since no more messages will be send via the socket. We should advice to > > use shutdown before closing socket. > > I'm looking into this now. The picture may be more complex than this. > Tell me, so you have a Solaris system available for testing? > > Thanks, Hi Michael, Thanks for looking into this. Unfortunately I do not have any Solaris system for testing, that was a customer report. His complaint was mainly not because the behaviour on Linux differs, but because this was not documented anywhere. Thanks! -Lukas > > Michael > > > > Signed-off-by: Lukas Czerner <lczerner@xxxxxxxxxx> > > --- > > man2/close.2 | 7 +++++++ > > 1 files changed, 7 insertions(+), 0 deletions(-) > > > > diff --git a/man2/close.2 b/man2/close.2 > > index a2a2961..02472f3 100644 > > --- a/man2/close.2 > > +++ b/man2/close.2 > > @@ -114,6 +114,13 @@ other threads in the same process. > > Since a file descriptor may be reused, > > there are some obscure race conditions > > that may cause unintended side effects. > > +.PP > > +When dealing with sockets, you have to be sure that there is no > > +.BR recv (2) > > +still blocking on it on another thread, otherwise it might block forever, > > +since no more messages will be send via the socket. Be sure to use > > +.BR shutdown (2) > > +to shut down all parts the connection before closing the socket. > > .\" Date: Tue, 4 Sep 2007 13:57:35 +0200 > > .\" From: Fredrik Noring <noring@xxxxxxxxxx> > > .\" One such race involves signals and ERESTARTSYS. If a file descriptor > > -- > > 1.7.4.4 > > > > > > > > --
