Support touching custom PID files

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

src/service.c

@@ -25,6 +25,7 @@
 #include "config.h"		/* Generated by configure script */
 
 #include <ctype.h>		/* isblank() */
+#include <sched.h>		/* sched_yield() */
 #include <string.h>
 #include <sys/resource.h>
 #include <sys/wait.h>
@@ -430,6 +431,8 @@ static int service_stop(svc_t *svc)
  */
 static int service_restart(svc_t *svc)
 {
+	int rc;
+
 	/* Ignore if finit is SIGSTOP'ed */
 	if (is_norespawn())
 		return 1;
@@ -449,7 +452,15 @@ static int service_restart(svc_t *svc)
 	svc_starting(svc);
 
 	_d("Sending SIGHUP to PID %d", svc->pid);
-	return print_result(kill(svc->pid, SIGHUP));
+	rc = kill(svc->pid, SIGHUP);
+
+	/* Service does not maintain a PID file on its own */
+	if (svc_has_pidfile(svc)) {
+		sched_yield();
+		touch(pid_file(svc));
+	}
+
+	return print_result(rc);
 }
 
 /**
@@ -686,6 +697,9 @@ recreate:
 	if (desc)
 		strlcpy(svc->desc, desc, sizeof(svc->desc));
 
+	/* Always clear svc PID file, for now.  See TODO */
+	svc->pidfile[0] = 0;
+	/* Decode any optional pid:/optional/path/to/file.pid */
 	if (pid && svc_is_daemon(svc) && pid_file_parse(svc, pid))
 		_e("Invalid 'pid' argument to service: %s", pid);