Log the modification time of the content file in probe and other commmands

HISTORY

@@ -10,8 +10,7 @@ SnapRAID HISTORY
    "make check" on build servers that may use such filesystems.
    No update is required if you have not encountered an error message about
    failure to advise files.
-   Note that this error is surfacing only now because the 14.x branch includes
-   more extensive tests.
+ * Log the modification time of the content file in probe and other commmands.
 
 14.1 2026/03
 ============

cmdline/device.c

@@ -820,7 +820,7 @@ void state_attr(struct snapraid_state* state, tommy_list* low)
 	}
 }
 
-static void state_probe(struct snapraid_state* state, tommy_list* low)
+static void state_probe_report(struct snapraid_state* state, tommy_list* low)
 {
 	tommy_node* i;
 	size_t device_pad;
@@ -1126,7 +1126,7 @@ void state_device(struct snapraid_state* state, int operation, tommy_list* filte
 			state_smart(state, state->level + tommy_list_count(&state->disklist), &low);
 
 		if (operation == DEVICE_PROBE)
-			state_probe(state, &low);
+			state_probe_report(state, &low);
 
 		if (operation == DEVICE_UP)
 			state_attr(state, &low);

cmdline/snapraid.c

@@ -1974,6 +1974,9 @@ int snapraid_main(int argc, char* argv[])
 	} else if (operation == OPERATION_SMART) {
 		state_device(&state, DEVICE_SMART, 0);
 	} else if (operation == OPERATION_PROBE) {
+		/* probe also the content file */
+		state_probe(&state);
+
 		state_device(&state, DEVICE_PROBE, 0);
 	} else if (operation == OPERATION_STATUS) {
 		state_read(&state);

cmdline/state.c

@@ -4194,6 +4194,39 @@ static void state_write_content(struct snapraid_state* state, uint32_t* out_crc)
 	*out_crc = crc;
 }
 
+void state_probe(struct snapraid_state* state)
+{
+	char path[PATH_MAX];
+	struct stat st;
+	tommy_node* node;
+
+	/* iterate over all the available content files and check the first one present */
+	node = tommy_list_head(&state->contentlist);
+	while (node) {
+		struct snapraid_content* content = node->data;
+
+		pathcpy(path, sizeof(path), content->content);
+
+		if (stat(path, &st) == 0) {
+			/* if found stop the search */
+			break;
+		}
+
+		/* next content file */
+		node = node->next;
+	}
+
+	/* if not found, assume empty */
+	if (!node)
+		return;
+
+	if (!state->no_conf) {
+		/* intentionally don't output the content path because it's not really read */
+		log_tag("content_info:probe_unixtime:%" PRId64 "\n", (int64_t)st.st_mtime);
+		log_flush();
+	}
+}
+
 void state_read(struct snapraid_state* state)
 {
 	STREAM* f;
@@ -4210,16 +4243,11 @@ void state_read(struct snapraid_state* state)
 		struct snapraid_content* content = node->data;
 		pathcpy(path, sizeof(path), content->content);
 
-		if (!state->no_conf) {
-			char esc_buffer[ESC_MAX];
-			log_tag("content:%s\n", esc_tag(path, esc_buffer));
-			log_flush();
-		}
 		msg_progress("Loading state from %s...\n", path);
 
 		f = sopen_read(path, STREAM_FLAGS_SEQUENTIAL | STREAM_FLAGS_CRC);
 		if (f != 0) {
-			/* if opened stop the search */
+			/* if found stop the search */
 			break;
 		} else {
 			/* if it's real error of an existing file, abort */
@@ -4261,6 +4289,13 @@ void state_read(struct snapraid_state* state)
 		/* LCOV_EXCL_STOP */
 	}
 
+	if (!state->no_conf) {
+		char esc_buffer[ESC_MAX];
+		log_tag("content:%s\n", esc_tag(path, esc_buffer));
+		log_tag("content_info:read_unixtime:%" PRId64 "\n", (int64_t)st.st_mtime);
+		log_flush();
+	}
+
 	/* go further to check other content files */
 	while (node) {
 		char other_path[PATH_MAX];
@@ -4566,6 +4601,7 @@ static void state_rename_content(struct snapraid_state* state)
 void state_write(struct snapraid_state* state)
 {
 	uint32_t crc;
+	time_t now;
 
 	/* write all the content files */
 	state_write_content(state, &crc);
@@ -4576,6 +4612,11 @@ void state_write(struct snapraid_state* state)
 	/* rename the new files, over the old ones */
 	state_rename_content(state);
 
+	/* log the write time of the content file */
+	now = time(0);
+	log_tag("content_info:write_unixtime:%" PRId64 "\n", (int64_t)now);
+	log_flush();
+
 	state->need_write = 0; /* no write needed anymore */
 	state->checked_read = 0; /* what we wrote is not checked in read */
 	state->written = 1;

cmdline/state.h

@@ -217,6 +217,11 @@ void state_done(struct snapraid_state* state);
  */
 void state_config(struct snapraid_state* state, const char* path, const char* command, struct snapraid_option* opt, tommy_list* filterlist_disk);
 
+/**
+ * Probe the state.
+ */
+void state_probe(struct snapraid_state* state);
+
 /**
  * Read the state.
  */