On Sun, Jul 31, 2011 at 04:20:08PM +0200, Christoph P.U. Kukulies wrote: > I posted this on freebsd-questions also but maybe the expert density > isn't that high as here in "hackers". > Since I think it may be a design or implementation issue in FreeBSDs' > select(), I'm posting it here as well, > hoping to get an experts' answer.
> I have written a small server to test TCP/IP roundtrip times of the > packets in a proprietary protocol and while > compiling and running this server on different platforms (Windows > 7/cygwin, UbuntuLinux, FreeBSD 8.0 Release), I found > that the server produces an error when the listening socket (on which > the accept() is performed) is also > member of the select() fd_set. > On the other platforms the program works without error, just under > FreeBSD I'm getting this "invalid argument" error. > Comments appreciated (despite comments about the error checking logic > [snip] > tv.tv_sec = 0; > tv.tv_usec = 5000000; /* 5 seconds */ > [snip] > n = select(nfds, &readfds, > (fd_set *) NULL, /* not interested in write */ > (fd_set *) NULL, /* ...or exceptions */ > &tv); /* timeout */ The number of microseconds in a struct timeval must be nonnegative and less than one million (likewise, the number of nanoseconds in a struct timespec must be nonnegative and less than 1000 million). FreeBSD checks this strictly in most functions. -- Jilles Tjoelker _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[email protected]"
