X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=lib%2Flogging.c;h=cf5c9955376c330c8233b86de4f389b2da62d148;hb=9b24b6aa4258079f2b59fa156dd3e070969f6f2a;hp=371bc596048295f7a66c732ff3237c38e00aefef;hpb=373c938b7b096e1bcb09623c56b7c82b3b7a6744;p=babeltrace.git

diff --git a/lib/logging.c b/lib/logging.c
index 371bc596..cf5c9955 100644
--- a/lib/logging.c
+++ b/lib/logging.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017 Philippe Proulx <pproulx@efficios.com>
+ * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -27,8 +27,25 @@
 #define BT_LOG_TAG "LIB"
 #include <babeltrace/lib-logging-internal.h>
 
+#ifdef BT_DEV_MODE
+/*
+ * Default log level is FATAL in developer mode because fatal logging is
+ * our way to communicate an unsatisfied precondition and the details.
+ */
+# define DEFAULT_LOG_LEVEL	BT_LOG_FATAL
+#else
+/*
+ * In non-developer mode, use NONE by default: we don't to print logging
+ * statements for any executable which links with the library. The
+ * executable should call bt_logging_set_global_level() or the
+ * executable's user should set the BABELTRACE_LOGGING_GLOBAL_LEVEL
+ * environment variable.
+ */
+# define DEFAULT_LOG_LEVEL	BT_LOG_NONE
+#endif /* BT_DEV_MODE */
+
 BT_HIDDEN
-int bt_lib_log_level = BT_LOG_NONE;
+int bt_lib_log_level = DEFAULT_LOG_LEVEL;
 
 enum bt_logging_level bt_logging_get_minimal_level(void)
 {
@@ -42,6 +59,17 @@ enum bt_logging_level bt_logging_get_global_level(void)
 
 void bt_logging_set_global_level(enum bt_logging_level log_level)
 {
+#ifdef BT_DEV_MODE
+	/*
+	 * Do not allow the library's log level to fall to NONE when in
+	 * developer mode because fatal logging is our way to
+	 * communicate an unsatisfied precondition and the details.
+	 */
+	if (log_level == BT_LOG_NONE) {
+		log_level = BT_LOG_FATAL;
+	}
+#endif
+
 	bt_lib_log_level = log_level;
 }