printing: return last change time with pcap_cache_loaded()

Bug: https://bugzilla.samba.org/show_bug.cgi?id=10652

Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit 30ce835670a6aeca6fb960ea7c4fe1b982bdd5b0)

5 files changed, 13 insertions, 7 deletions

diff --git a/source3/printing/load.c b/source3/printing/load.c
index 2ba3b2e106..238998d920 100644
--- a/source3/printing/load.c
+++ b/source3/printing/load.c
@@ -65,7 +65,7 @@ load automatic printer services from pre-populated pcap cache
 void load_printers(struct tevent_context *ev,
 		   struct messaging_context *msg_ctx)
 {
-	SMB_ASSERT(pcap_cache_loaded());
+	SMB_ASSERT(pcap_cache_loaded(NULL));
 
 	add_auto_printers();
 
diff --git a/source3/printing/pcap.c b/source3/printing/pcap.c
index 9c44584a4d..c5524ad53d 100644
--- a/source3/printing/pcap.c
+++ b/source3/printing/pcap.c
@@ -83,13 +83,19 @@ void pcap_cache_destroy_specific(struct pcap_cache **pp_cache)
 	*pp_cache = NULL;
 }
 
-bool pcap_cache_loaded(void)
+bool pcap_cache_loaded(time_t *_last_change)
 {
 	NTSTATUS status;
 	time_t last;
 
 	status = printer_list_get_last_refresh(&last);
-	return NT_STATUS_IS_OK(status);
+	if (!NT_STATUS_IS_OK(status)) {
+		return false;
+	}
+	if (_last_change != NULL) {
+		*_last_change = last;
+	}
+	return true;
 }
 
 bool pcap_cache_replace(const struct pcap_cache *pcache)
diff --git a/source3/printing/pcap.h b/source3/printing/pcap.h
index 7dccf84b37..8fc9e9de31 100644
--- a/source3/printing/pcap.h
+++ b/source3/printing/pcap.h
@@ -35,7 +35,7 @@ struct pcap_cache;
 
 bool pcap_cache_add_specific(struct pcap_cache **ppcache, const char *name, const char *comment, const char *location);
 void pcap_cache_destroy_specific(struct pcap_cache **ppcache);
-bool pcap_cache_loaded(void);
+bool pcap_cache_loaded(time_t *_last_change);
 bool pcap_cache_replace(const struct pcap_cache *cache);
 void pcap_printer_fn_specific(const struct pcap_cache *, void (*fn)(const char *, const char *, const char *, void *), void *);
 void pcap_printer_read_fn(void (*fn)(const char *, const char *, const char *, void *), void *);
diff --git a/source3/printing/queue_process.c b/source3/printing/queue_process.c
index aa0d0fb6a8..24d361c2bf 100644
--- a/source3/printing/queue_process.c
+++ b/source3/printing/queue_process.c
@@ -390,7 +390,7 @@ void printing_subsystem_update(struct tevent_context *ev_ctx,
 			       bool force)
 {
 	if (background_lpq_updater_pid != -1) {
-		if (pcap_cache_loaded()) {
+		if (pcap_cache_loaded(NULL)) {
 			load_printers(ev_ctx, msg_ctx);
 		}
 		if (force) {
diff --git a/source3/printing/spoolssd.c b/source3/printing/spoolssd.c
index c9c8a6972e..59f560cd3b 100644
--- a/source3/printing/spoolssd.c
+++ b/source3/printing/spoolssd.c
@@ -304,7 +304,7 @@ static bool spoolss_child_init(struct tevent_context *ev_ctx,
 	 * If so then we probably missed a message and should load_printers()
 	 * ourselves. If pcap has not been loaded yet, then ignore, we will get
 	 * a message as soon as the bq process completes the reload. */
-	if (pcap_cache_loaded()) {
+	if (pcap_cache_loaded(NULL)) {
 		load_printers(ev_ctx, msg_ctx);
 	}
 
@@ -724,7 +724,7 @@ pid_t start_spoolssd(struct tevent_context *ev_ctx,
 	 * If pcap has not been loaded yet, then ignore, as we will reload on
 	 * client enumeration anyway.
 	 */
-	if (pcap_cache_loaded()) {
+	if (pcap_cache_loaded(NULL)) {
 		load_printers(ev_ctx, msg_ctx);
 	}