Make cntrl-c work again on macOS, after we do a TLS handhshake

src/lib/io/schedule.c

@@ -172,6 +172,22 @@ static void *fr_schedule_worker_thread(void *arg)
 	fr_schedule_child_status_t	status = FR_CHILD_FAIL;
 	fr_schedule_network_t		*sn;
 	char				worker_name[32];
+
+#ifndef __APPLE__
+	/*
+	 * This ifdef is because macOS doesn't use pthread_signmask in its
+	 * setcontext function, and seems to apply the signal mask of the thread
+	 * to the entire process when setcontext is called.
+	 *
+	 *  * frame #0: 0x00000001934118b0 libsystem_kernel.dylib`sigprocmask
+	 *  frame #1: 0x0000000193481f3c libsystem_platform.dylib`setcontext + 44
+	 *  frame #2: 0x0000000100f27298 libcrypto.3.dylib`async_fibre_swapcontext + 52
+	 *  frame #3: 0x0000000100f274a0 libcrypto.3.dylib`ASYNC_start_job + 496
+	 *  frame #4: 0x0000000100b17884 libssl.3.dylib`ssl_start_async_job + 116
+	 *  frame #5: 0x0000000100b17804 libssl.3.dylib`ssl_read_internal + 356
+	 *  frame #6: 0x0000000100b17a0c libssl.3.dylib`SSL_read + 28
+	 *  frame #7: 0x00000001004f5b94 libfreeradius-tls.dylib`tls_session_async_handshake_cont(p_result=0x0000000112815c7c, priority=0x0000000112815edc, request=0x0000000112815a80, uctx=0x0000000139160060) at session.c:1366:26
+	 */
 	sigset_t			sigset;
 
 	sigfillset(&sigset);
@@ -182,6 +198,7 @@ static void *fr_schedule_worker_thread(void *arg)
 	 *	idle, so they can handle signals.
 	 */
 	pthread_sigmask(SIG_BLOCK, &sigset, NULL);
+#endif
 
 	worker_id = sw->id;		/* Store the current worker ID */
 
@@ -303,16 +320,33 @@ static void *fr_schedule_network_thread(void *arg)
 	fr_schedule_child_status_t	status = FR_CHILD_FAIL;
 	fr_event_list_t			*el;
 	char				network_name[32];
+
+#ifndef __APPLE__
+	/*
+	 * This ifdef is because macOS doesn't use pthread_signmask in its
+	 * setcontext function, and seems to apply the signal mask of the thread
+	 * to the entire process when setcontext is called.
+	 *
+	 *  * frame #0: 0x00000001934118b0 libsystem_kernel.dylib`sigprocmask
+	 *  frame #1: 0x0000000193481f3c libsystem_platform.dylib`setcontext + 44
+	 *  frame #2: 0x0000000100f27298 libcrypto.3.dylib`async_fibre_swapcontext + 52
+	 *  frame #3: 0x0000000100f274a0 libcrypto.3.dylib`ASYNC_start_job + 496
+	 *  frame #4: 0x0000000100b17884 libssl.3.dylib`ssl_start_async_job + 116
+	 *  frame #5: 0x0000000100b17804 libssl.3.dylib`ssl_read_internal + 356
+	 *  frame #6: 0x0000000100b17a0c libssl.3.dylib`SSL_read + 28
+	 *  frame #7: 0x00000001004f5b94 libfreeradius-tls.dylib`tls_session_async_handshake_cont(p_result=0x0000000112815c7c, priority=0x0000000112815edc, request=0x0000000112815a80, uctx=0x0000000139160060) at session.c:1366:26
+	 */
 	sigset_t			sigset;
 
 	sigfillset(&sigset);
 
 	/*
-	 *	Ensure network threads aren't interrupted by
-	 *	signals. The main thread, and main event loop
-	 *	are mostly idle, so they can handle signals.
+	 *	Ensure workers aren't interrupted by signals.
+	 *	The main thread, and main event loop are mostly
+	 *	idle, so they can handle signals.
 	 */
 	pthread_sigmask(SIG_BLOCK, &sigset, NULL);
+#endif
 
 	snprintf(network_name, sizeof(network_name), "Network %d", sn->id);