Messages in this thread | | | Date | Wed, 14 Mar 2001 08:12:06 +0000 (UTC) | From | "Henning P. Schmiedehausen" <> | Subject | Re: poll() behaves differently in Linux 2.4.1 vs. Linux 2.2.14 (POLLHUP) |
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davem@redhat.com (David S. Miller) writes:
>Jeffrey Butler writes: > > I've noticed that poll() calls on IPv4 sockets do > > not behave the same under linux 2.4 vs. linux 2.2.14. > > Linux 2.4 will return POLLHUP for a socket that is not > > connected (and has never been connected) while Linux > > 2.2 will not. > > The following example program demonstrates the > > problem when it's run under linux 2.4:
>True, this behavior was changed from 2.2.x. We now match the behavior >of other svr4 systems, in particular Solaris. This new behavior in >2.4.x will not change.
Hi,
but Jeffrey wrote:
--- cut --- JB> Other operating systems (not that they are necessarily JB> correct) also output the same as Linux 2.2.14. I JB> tried this on FreeBSD 4.4.1, Solaris 5.7 (on a SPARC), JB> and Windows 2000 with Cygwin 1.1.7. --- cut ---
This is BSD, SysVR4 and an abomination all behaving like 2.2.x and not 2.4.x (which confuses the heck out of a poll()-using daemon here... :-) )
I'd prefer not to have too many user space surprises in moving from 2.2 to 2.4.
Regards Henning -- Dipl.-Inf. (Univ.) Henning P. Schmiedehausen -- Geschaeftsfuehrer INTERMETA - Gesellschaft fuer Mehrwertdienste mbH hps@intermeta.de
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