From 09716e45a05cc0c93bcf55bd0c0888dd678e490f Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Thu, 9 Jun 2011 00:55:37 +0200 Subject: [PATCH] sigfd: use pthread_sigmask MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Qemu uses signalfd to figure out, if a signal occured without the need to actually receive the signal. Instead, it can read from the fd to receive its news. Now, we obviously don't always have signalfd around. Especially not on non-Linux systems. So what we do there is that we create a new thread, block that thread on all signals and simply call sigwait to wait for a signal we're interested in to occur. This all sounds great, but what we're really doing is: sigset_t all; sigfillset(&all); sigprocmask(SIG_BLOCK, &all, NULL); which - on Darwin - blocks all signals on the current _process_, not only on the current thread. To block signals on the thread, we can use pthread_sigmask(). This patch does that, assuming that my above analysis is correct, and thus renders Qemu useable on Darwin again. Reported-by: Andreas Färber Acked-by: Paolo Bonizni CC: Jan Kiszka CC: Anthony Liguori Signed-off-by: Alexander Graf Signed-off-by: Edgar E. Iglesias --- compatfd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/compatfd.c b/compatfd.c index bd377c4..41586ce 100644 --- a/compatfd.c +++ b/compatfd.c @@ -29,7 +29,7 @@ static void *sigwait_compat(void *opaque) sigset_t all; sigfillset(&all); - sigprocmask(SIG_BLOCK, &all, NULL); + pthread_sigmask(SIG_BLOCK, &all, NULL); while (1) { int sig; -- 2.7.4