Consolidate start/finish of monitor on different platforms into

one API. Monitor is started either before main loop, if scanner
isn't running, or in the main loop once we finished waiting for
the scanner.

minidlna.c

@@ -64,7 +64,6 @@
 #include <time.h>
 #include <signal.h>
 #include <errno.h>
-#include <pthread.h>
 #include <limits.h>
 #include <libgen.h>
 #include <pwd.h>
@@ -1088,6 +1087,19 @@ init(int argc, char **argv)
 	return 0;
 }
 
+#ifdef HAVE_WATCH
+void
+start_monitor()
+{
+
+	if (!GETFLAG(INOTIFY_MASK))
+		return;
+
+	lav_register_all();
+	monitor_start();
+}
+#endif
+
 /* === main === */
 /* process HTTP or SSDP requests */
 int
@@ -1103,7 +1115,6 @@ main(int argc, char **argv)
 	u_long timeout;	/* in milliseconds */
 	int last_changecnt = 0;
 	pid_t scanner_pid = 0;
-	pthread_t inotify_thread = 0;
 	struct event ssdpev, httpev, monev;
 #ifdef TIVO_SUPPORT
 	uint8_t beacon_interval = 5;
@@ -1138,23 +1149,11 @@ main(int argc, char **argv)
 	}
 	check_db(db, ret, &scanner_pid);
 	lastdbtime = _get_dbtime();
-#ifdef HAVE_INOTIFY
-	if( GETFLAG(INOTIFY_MASK) )
-	{
-		if (!sqlite3_threadsafe() || sqlite3_libversion_number() < 3005001)
-			DPRINTF(E_ERROR, L_GENERAL, "SQLite library is not threadsafe!  "
-			                            "Inotify will be disabled.\n");
-		else if (pthread_create(&inotify_thread, NULL, start_inotify, NULL) != 0)
-			DPRINTF(E_FATAL, L_GENERAL, "ERROR: pthread_create() failed for start_inotify. EXITING\n");
-	}
-#endif /* HAVE_INOTIFY */
 
-#ifdef HAVE_KQUEUE
-	if (!GETFLAG(SCANNING_MASK)) {
-		lav_register_all();
-		kqueue_monitor_start();
-	}
-#endif /* HAVE_KQUEUE */
+#ifdef HAVE_WATCH
+	if (!GETFLAG(SCANNING_MASK))
+		start_monitor();
+#endif
 
 	smonitor = OpenAndConfMonitorSocket();
 	if (smonitor > 0)
@@ -1272,14 +1271,18 @@ main(int argc, char **argv)
 		}
 #endif
 
-		if (GETFLAG(SCANNING_MASK) && kill(scanner_pid, 0) != 0) {
+		if (GETFLAG(SCANNING_MASK)) {
+			if (kill(scanner_pid, 0) != 0) {
+				DPRINTF(E_INFO, L_GENERAL, "Scanner exited\n");
 				CLEARFLAG(SCANNING_MASK);
 				if (_get_dbtime() != lastdbtime)
 					updateID++;
-#ifdef HAVE_KQUEUE
-			lav_register_all();
-			kqueue_monitor_start();
-#endif /* HAVE_KQUEUE */
+#ifdef HAVE_WATCH
+				start_monitor();
+#endif
+			} else
+				/* Keep checking for the scanner every sec. */
+				timeout = 1000;
 		}
 
 		event_module.process(timeout);
@@ -1351,11 +1354,9 @@ shutdown:
 		close(lan_addr[i].snotify);
 	}
 
-	if (inotify_thread)
-	{
-		pthread_kill(inotify_thread, SIGCHLD);
-		pthread_join(inotify_thread, NULL);
-	}
+#ifdef HAVE_WATCH
+	monitor_stop();
+#endif
 
 	/* kill other child processes */
 	process_reap_children();

monitor.h

@@ -7,13 +7,6 @@ int monitor_remove_directory(int fd, const char * path);
 #define	HAVE_WATCH 1
 int	monitor_add_watch(int, const char *);
 int	monitor_remove_watch(int, const char *);
-#endif
-
-#ifdef HAVE_INOTIFY
-void *
-start_inotify();
-#endif
-
-#ifdef HAVE_KQUEUE
-void	kqueue_monitor_start();
+void 	monitor_start();
+void 	monitor_stop();
 #endif

monitor_inotify.c

@@ -22,6 +22,7 @@
 #include <stdbool.h>
 #include <stdlib.h>
 #include <errno.h>
+#include <pthread.h>
 #include <unistd.h>
 #include <dirent.h>
 #include <libgen.h>
@@ -69,6 +70,7 @@ struct watch
 
 static struct watch *watches;
 static struct watch *lastwatch = NULL;
+static pthread_t thread_id;
 
 static char *
 get_path_from_wd(int wd)
@@ -253,8 +255,8 @@ inotify_remove_watches(int fd)
 	return rm_watches;
 }
 
-void *
-start_inotify(void)
+static void *
+inotify_thread(void *arg)
 {
 	struct pollfd pollfds[1];
 	char buffer[BUF_LEN];
@@ -274,17 +276,10 @@ start_inotify(void)
 	if ( pollfds[0].fd < 0 )
 		DPRINTF(E_ERROR, L_INOTIFY, "inotify_init() failed!\n");
 
-	while( GETFLAG(SCANNING_MASK) )
-	{
-		if( quitting )
-			goto quitting;
-		sleep(1);
-	}
 	inotify_create_watches(pollfds[0].fd);
 	if (setpriority(PRIO_PROCESS, 0, 19) == -1)
 		DPRINTF(E_WARN, L_INOTIFY,  "Failed to reduce inotify thread priority\n");
 	sqlite3_release_memory(1<<31);
-	lav_register_all();
 
 	while( !quitting )
 	{
@@ -379,8 +374,31 @@ start_inotify(void)
 		}
 	}
 	inotify_remove_watches(pollfds[0].fd);
-quitting:
 	close(pollfds[0].fd);
 
 	return 0;
 }
+
+void
+monitor_start(void)
+{
+
+	if (!sqlite3_threadsafe() || sqlite3_libversion_number() < 3005001) {
+		DPRINTF(E_ERROR, L_GENERAL, "SQLite library is not threadsafe!"
+		    "Inotify will be disabled.\n");
+		return;
+	}
+	if (pthread_create(&thread_id, NULL, inotify_thread, NULL) != 0)
+		DPRINTF(E_FATAL, L_GENERAL, "pthread_create() failed [%s]\n",
+		    strerror(errno));
+}
+
+void
+monitor_stop(void)
+{
+
+	if (thread_id != 0) {
+		pthread_kill(thread_id, SIGCHLD);
+		pthread_join(thread_id, NULL);
+	}
+}

monitor_kqueue.c

@@ -259,13 +259,12 @@ monitor_remove_watch(int fd __unused, const char *path __unused)
 }
 
 /*
- * XXXGL: this function has too much copypaste of inotify_create_watches().
- * We need to split out inotify stuff from monitor.c into monitor_inotify.c,
- * compile the latter on Linux and this file on FreeBSD, and keep monitor.c
- * itself platform independent.
+ * XXXGL: this function has some copypaste with inotify_create_watches().
+ * We need to push more code to platform independent start_monitor()
+ * in minidlna.c.
  */
 void
-kqueue_monitor_start()
+monitor_start()
 {
 	struct media_dir_s *media_path;
 	char **result;
@@ -280,3 +279,8 @@ kqueue_monitor_start()
 		monitor_add_watch(0, result[i]);
 	sqlite3_free_table(result);
 }
+
+void
+monitor_stop()
+{
+}