Hello,
As the documentation explains, when poll() is interrupted by a signal, it
should return -1/EINTR.
However, I'm getting a return indicating that all of the polling descriptors
are ready, but when I check their flags out, none of them are
ready. (Note that the same code behaves as expected on Linux)
This is on the Generic 4.7 release kernel.
Here's a snippet of code that I wrote to deal smoothly this behavior:
(specifically, the last line)
pollfd wait_fd[2];
wait_fd[0].fd = sock_fd;
wait_fd[0].events = POLLOUT;
wait_fd[1].fd = abort_fd;
wait_fd[1].events = POLLIN;
int rfds;
do
rfds = poll(wait_fd, 2, NULL);
while((rfds < 0 && errno == EINTR) || (rfds > 0 && !wait_fd[0].revents &&
!wait_fd[1].revents));
The thing is, I have no idea if this this is a feature or bug, or what. :-P
Thanks for any input,
Yarin
