From 008c9d0036e348242e323c0b5a66f3724b4a839d Mon Sep 17 00:00:00 2001
From: William Hubbs <w.d.hubbs@gmail.com>
Date: Mon, 5 Nov 2018 21:35:00 -0600
Subject: supervise-daemon: reap zombies
We need to make sure to reap zombies so that we can shut down
successfully.
Fixes #252.
Possibly related to #250.
---
src/rc/supervise-daemon.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/src/rc/supervise-daemon.c b/src/rc/supervise-daemon.c
index 883c738d..52525c19 100644
--- a/src/rc/supervise-daemon.c
+++ b/src/rc/supervise-daemon.c
@@ -197,6 +197,16 @@ static void healthcheck(int sig)
do_healthcheck = 1;
}
+static void reap_zombies(int sig)
+{
+ int serrno;
+ (void) sig;
+
+ serrno = errno;
+ while (waitpid((pid_t)(-1), NULL, WNOHANG) > 0) {}
+ errno = serrno;
+}
+
static char * expand_home(const char *home, const char *path)
{
char *opath, *ppath, *p, *nh;
@@ -457,6 +467,7 @@ static void supervisor(char *exec, char **argv)
signal_setup_restart(SIGPIPE, handle_signal);
signal_setup_restart(SIGALRM, handle_signal);
signal_setup(SIGTERM, handle_signal);
+ signal_setup(SIGCHLD, reap_zombies);
signal_setup_restart(SIGUSR1, handle_signal);
signal_setup_restart(SIGUSR2, handle_signal);
signal_setup_restart(SIGBUS, handle_signal);
--
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