Fix `mosquitto_pub -l` not sending the final line of stdin

This would happen if the final line did not end with a new line.

Closes #1473. Thanks to majekw.

ChangeLog.txt

@@ -24,6 +24,8 @@ Client library:
 Clients:
 - Fix duplicate cfg definition in rr_client. Closes #1453.
 - Fix `mosquitto_pub -l` hang when stdin stream ends. Closes #1448.
+- Fix `mosquitto_pub -l` not sending the final line of stdin if it does not
+  end with a new line. Closes #1473.
 
 Build:
 - Added `CLIENT_STATIC_LDADD` to makefile builds to allow more libraries to be

client/pub_client.c

@@ -223,7 +223,7 @@ int pub_shared_init(void)
 int pub_stdin_line_loop(struct mosquitto *mosq)
 {
 	char *buf2;
-	int buf_len_actual;
+	int buf_len_actual = 0;
 	int pos;
 	int rc = MOSQ_ERR_SUCCESS;
 	int read_len;
@@ -240,6 +240,7 @@ int pub_stdin_line_loop(struct mosquitto *mosq)
 				if(line_buf[buf_len_actual-1] == '\n'){
 					line_buf[buf_len_actual-1] = '\0';
 					rc = my_publish(mosq, &mid_sent, cfg.topic, buf_len_actual-1, line_buf, cfg.qos, cfg.retain);
+					pos = 0;
 					if(rc){
 						err_printf(&cfg, "Error: Publish returned %d, disconnecting.\n", rc);
 						mosquitto_disconnect_v5(mosq, MQTT_RC_DISCONNECT_WITH_WILL_MSG, cfg.disconnect_props);
@@ -257,6 +258,13 @@ int pub_stdin_line_loop(struct mosquitto *mosq)
 					line_buf = buf2;
 				}
 			}
+			if(pos != 0){
+				rc = my_publish(mosq, &mid_sent, cfg.topic, buf_len_actual, line_buf, cfg.qos, cfg.retain);
+				if(rc){
+					err_printf(&cfg, "Error: Publish returned %d, disconnecting.\n", rc);
+					mosquitto_disconnect_v5(mosq, MQTT_RC_DISCONNECT_WITH_WILL_MSG, cfg.disconnect_props);
+				}
+			}
 			if(feof(stdin)){
 				if(mid_sent == -1){
 					/* Empty file */