+static void
+uloop_signal_fd_cb(struct uloop_fd *fd, unsigned int events)
+{
+ struct signalfd_siginfo fdsi;
+ int ret;
+
+retry:
+ ret = read(fd->fd, &fdsi, sizeof(fdsi));
+ if (ret < 0 && errno == EINTR)
+ goto retry;
+
+ if (ret != sizeof(fdsi))
+ return;
+
+ uloop_handle_signal(fdsi.ssi_signo);
+}
+
+static bool
+uloop_setup_signalfd(bool add)
+{
+ static struct uloop_fd sfd = {
+ .cb = uloop_signal_fd_cb
+ };
+ static sigset_t prev_mask;
+ sigset_t mask;
+
+ if (signal_fd < 0)
+ return false;
+
+ sigemptyset(&mask);
+
+ if (!add) {
+ uloop_fd_delete(&sfd);
+ sigprocmask(SIG_BLOCK, &prev_mask, NULL);
+ } else {
+ sigaddset(&mask, SIGQUIT);
+ sigaddset(&mask, SIGINT);
+ sigaddset(&mask, SIGTERM);
+ sigaddset(&mask, SIGCHLD);
+ sigprocmask(SIG_BLOCK, &mask, &prev_mask);
+
+ sfd.fd = signal_fd;
+ uloop_fd_add(&sfd, ULOOP_READ | ULOOP_EDGE_TRIGGER);
+ }
+
+ if (signalfd(signal_fd, &mask, SFD_NONBLOCK | SFD_CLOEXEC) < 0) {
+ sigprocmask(SIG_BLOCK, &prev_mask, NULL);
+ return false;
+ }
+
+ return true;
+}
+