sessiond: notification: receive incoming notifications from tracers
[lttng-tools.git] / src / bin / lttng-sessiond / process-utils.c
1 /*
2 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
3 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 * Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 *
6 * SPDX-License-Identifier: GPL-2.0-only
7 *
8 */
9
10 #include <signal.h>
11 #include "lttng-sessiond.h"
12
13 /* Notify parents that we are ready for cmd and health check */
14 void sessiond_signal_parents(void)
15 {
16 /*
17 * Notify parent pid that we are ready to accept command
18 * for client side. This ppid is the one from the
19 * external process that spawned us.
20 */
21 if (config.sig_parent) {
22 kill(ppid, SIGUSR1);
23 }
24
25 /*
26 * Notify the parent of the fork() process that we are
27 * ready.
28 */
29 if (config.daemonize || config.background) {
30 kill(child_ppid, SIGUSR1);
31 }
32 }
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