Em Mon, May 26, 2014 at 10:46:47AM -0300, Arnaldo Carvalho de Melo escreveu:

Em Thu, May 22, 2014 at 04:27:45PM +0200, Michael Kerrisk (man-pages) escreveu:

quoted

Thanks! I applied this patch against 3.15-rc6.

quoted

recvmmsg() now (mostly) does what I expect: 
* it waits until either the timeout expires or vlen messages 
  have been received
* If no message is received before timeout, it returns -1/EAGAIN.
* If vlen messages are received before the timeout expires, then
  the remaining time is returned in timeout.

quoted

One question: in the event that the call is interrupted by a signal 
handler, it fails (as expected) with EINTR, but the 'timeout' value is 
not updated with the remaining time on the timer. Would it be desirable 
to emulate the behavior of select() (and other syscalls) in this 
respect, and instead return the remaining time if interrupted by 
a signal?

I think so, will check how to achieve that!

Can you try the attached patch on top of the first one?

It starts adding explicit parentheses on a ternary, as David requested,
and then should return the remaining timeouts in cases like signals,
etc.

Please let me know if this is enough.

- Arnaldo

P.S. compile testing while sending this message :-)