From dfd5d6553ecc9ed1d4d79e8259865ba725927863 Mon Sep 17 00:00:00 2001
From: Alex Hornung <ahornung@gmail.com>
Date: Sat, 10 Jul 2010 16:13:00 +0100
Subject: [PATCH] udevd - add pidfile & SIGTERM handler

* Add the creation of a pidfile and a SIGTERM handler that disposes of
  the pidfile.

* add pidfile to rc script
---
 etc/rc.d/udevd     |  1 +
 sbin/udevd/udevd.c | 31 +++++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/etc/rc.d/udevd b/etc/rc.d/udevd
index 7fbef5d776..950ad7e11d 100644
--- a/etc/rc.d/udevd
+++ b/etc/rc.d/udevd
@@ -6,6 +6,7 @@
 
 name="udevd"
 rcvar=`set_rcvar`
+pidfile="/var/run/${name}.pid"
 command="/sbin/${name}"
 
 load_rc_config $name
diff --git a/sbin/udevd/udevd.c b/sbin/udevd/udevd.c
index 015998e672..d5f69e8d23 100644
--- a/sbin/udevd/udevd.c
+++ b/sbin/udevd/udevd.c
@@ -287,6 +287,13 @@ out:
 	return pa;
 }
 
+static void
+killed(int sig __unused)
+{
+	syslog(LOG_ERR, "udevd stopped");
+	unlink("/var/run/udevd.pid");
+}
+
 int
 ignore_signal(int signum)
 {
@@ -301,10 +308,25 @@ ignore_signal(int signum)
 	return ret;
 }
 
+static int
+set_killed_signal(void)
+{
+	struct sigaction act;
+	int ret;
+
+	act.sa_handler = killed;
+	sigemptyset(&act.sa_mask);
+	act.sa_flags = 0;
+
+	ret = sigaction(SIGTERM, &act, NULL);
+	return ret;	
+}
+
 int main(int argc __unused, char *argv[] __unused)
 {
 	int error __unused, i, r, s;
 	struct pollfd fds[NFDS];
+	FILE *pidf;
 
 	TAILQ_INIT(&pdev_array_list);
 	TAILQ_INIT(&udev_monitor_list);
@@ -325,9 +347,18 @@ int main(int argc __unused, char *argv[] __unused)
 	if (s < 0)
 		err(1, "init_local_server");
 
+	pidf = fopen("/var/run/udevd.pid", "w");
+	if (pidf == NULL)
+		err(1, "pidfile");
+
+	set_killed_signal();
+
 	if (daemon(0, 0) == -1)
 		err(1, "daemon");
 
+	fprintf(pidf, "%ld\n", (long)getpid());
+	fclose(pidf);
+
 	syslog(LOG_ERR, "udevd started");
 
 	pdev_array_entry_insert(udev_getdevs(udevfd));
-- 
2.41.0