commit dc3e25b130aee2682cc370e9505fd7386cbe8b53
from: Omar Polo <op@omarpolo.com>
date: Sat Oct 07 22:04:19 2023 UTC

work around (a possibly missing) pipe2(2)

Mac OS X... sigh...

commit - 2f1f196eeb0a20952b4d4a5914c9d54f50e32d97
commit + dc3e25b130aee2682cc370e9505fd7386cbe8b53
blob - fb082239dfb4bc5d58976a3c4c925d3ef9048873
blob + 34f6474a60c36c69c8755554776633328c8cb829
--- ev.c
+++ ev.c
@@ -160,9 +160,17 @@ ev_sigdispatch(int fd, int ev, void *data)
 int
 ev_signal(int sig, void (*cb)(int, int, void *), void *udata)
 {
+	int		 flags;
+
 	if (base->sigpipe[0] == -1) {
-		if (pipe2(base->sigpipe, O_NONBLOCK) == -1)
+		/* pipe2(2) is not available everywhere... sigh */
+		if (pipe(base->sigpipe) == -1)
+			return -1;
+
+		if ((flags = fcntl(base->sigpipe[1], F_GETFL)) == -1 ||
+		    fcntl(base->sigpipe[1], F_SETFL, flags | O_NONBLOCK) == -1)
 			return -1;
+
 		if (ev_add(base->sigpipe[0], POLLIN, ev_sigdispatch, NULL)
 		    == -1)
 			return -1;