posix: fix test on netbsd

core/sys/posix/signal.odin

@@ -408,7 +408,7 @@ SA_Flags_Bits :: enum c.int {
 	RESTART    = log2(SA_RESTART),
 	// Cause extra information to be passed to signal handlers at the time of receipt of a signal.
 	SIGINFO    = log2(SA_SIGINFO),
-	// Cause implemention not to create zombie processes or status information on child termination.
+	// Cause implementation not to create zombie processes or status information on child termination.
 	NOCLDWAIT  = log2(SA_NOCLDWAIT),
 	// Cause signal not to be automatically blocked on entry to signal handler.
 	SA_NODEFER = log2(SA_NODEFER),

core/sys/posix/sys_wait.odin

@@ -290,7 +290,7 @@ when ODIN_OS == .Darwin {
 
 	@(private)
 	_WEXITSTATUS :: #force_inline proc "contextless" (x: c.int) -> c.int {
-		return (x >> 8) & 0x000000ff
+		return c.int((c.uint(x) >> 8) & 0xff)
 	}
 
 	@(private)
@@ -310,7 +310,7 @@ when ODIN_OS == .Darwin {
 
 	@(private)
 	_WSTOPSIG :: #force_inline proc "contextless" (x: c.int) -> Signal {
-		return Signal((x >> 8) & 0xff)
+		return Signal(c.int((c.uint(x) >> 8) & 0xff))
 	}
 
 	@(private)

tests/core/sys/posix/posix.odin

@@ -249,10 +249,21 @@ test_signal :: proc(t: ^testing.T) {
 	case 0:
 		posix.exit(69)
 	case:
-		status: i32
-		posix.waitpid(pid, &status, {})
-		testing.expect(t, posix.WIFEXITED(status))
-		testing.expect(t, posix.WEXITSTATUS(status) == 69)
+		for {
+			status: i32
+			res := posix.waitpid(pid, &status, {})
+			if res == -1 {
+				if !testing.expect_value(t, posix.errno(), posix.Errno.EINTR) {
+					break
+				}
+			}
+
+			if posix.WIFEXITED(status) || posix.WIFSIGNALED(status) {
+				testing.expect(t, posix.WIFEXITED(status))
+				testing.expect(t, posix.WEXITSTATUS(status) == 69)
+				break
+			}
+        }
 	}
 }