On Wed, 17 Oct 2007, Michael Kerrisk wrote: > > With the new code Linus already merged, signalfd does not attach to the > > sighand anymore, so the "orphaned sighand" behaviour is no more there. > > An exec() will carry the fd over, and you will be able to use the fd in > > the same way you did before the exec(). If sigpending()/sigwaitinfo() will > > show signals available, so it should signalfd. > > So I wrote: > > execve(2) semantics > Just like any other file descriptor, a signalfd file > descriptor remains open across an execve(2), unless it > has been marked for close-on-exec (see fcntl(2)). Any > signals that were available for reading before the > execve(2) remain available to the newly loaded program. > (This is analogous to traditional signal semantics, where > a blocked signal that is pending remains pending across > an execve(2).) (This is analogous to traditional signal > semantics, where a blocked signal that is pending remains > pending across an execve(2).) > > Okay?
Ok > > It'll return the signals that would be normally returned to the thread > > with the standard signal delivery methods. That is, calling thread private > > signals, and calling thread-group shared signals. > > So I wrote: > > Thread semantics > The semantics of signalfd file descriptors in a multi- > threaded program mirror the standard semantics for sig- > nals. In other words, when a thread reads from a sig- > nalfd file descriptor, it will read the signals that are > directed to the thread itself and the signals that are > directed to the process (i.e., the entire thread group). > (A thread will not be able to read signals that are > directed to other threads in the process.) > > Okay? Ok, although this looks more specific: (A thread will not be able to read other threads private signals) - Davide - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
