uloop: revert signalfd support for now

It hasn't fixed the reported race condition and it introduced some new
issues.

Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 0 insertions, 77 deletions

diff --git a/uloop-epoll.c b/uloop-epoll.c
index 2d1c4a7..bb652fd 100644
--- a/uloop-epoll.c
+++ b/uloop-epoll.c
@@ -16,8 +16,6 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include <sys/signalfd.h>
-
 /**
  * FIXME: uClibc < 0.9.30.3 does not define EPOLLRDHUP for Linux >= 2.6.17
  */
@@ -25,79 +23,8 @@
 #define EPOLLRDHUP 0x2000
 #endif
 
-static void
-uloop_signal_fd_cb(struct uloop_fd *fd, unsigned int events)
-{
-	struct signalfd_siginfo fdsi;
-	struct sigaction act;
-	int ret;
-
-retry:
-	ret = read(fd->fd, &fdsi, sizeof(fdsi));
-	if (ret < 0 && errno == EINTR)
-		goto retry;
-
-	if (ret != sizeof(fdsi))
-		return;
-
-	switch (fdsi.ssi_signo) {
-	case SIGQUIT:
-	case SIGINT:
-	case SIGTERM:
-		sigaction(fdsi.ssi_signo, NULL, &act);
-		if (act.sa_handler != SIG_IGN &&
-			act.sa_handler != SIG_DFL) {
-			act.sa_handler(fdsi.ssi_signo);
-			break;
-		}
-
-		/* fall through */
-	default:
-		uloop_handle_signal(fdsi.ssi_signo);
-		break;
-	}
-}
-
-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;
-}
-
 int uloop_init(void)
 {
-	sigset_t mask;
-
 	if (poll_fd >= 0)
 		return 0;
 
@@ -106,10 +33,6 @@ int uloop_init(void)
 		return -1;
 
 	fcntl(poll_fd, F_SETFD, fcntl(poll_fd, F_GETFD) | FD_CLOEXEC);
-
-	sigemptyset(&mask);
-	signal_fd = signalfd(-1, &mask, SFD_NONBLOCK | SFD_CLOEXEC);
-
 	return 0;
 }