log: added log_early_init() for early debug messages

src/cmdline.c

@@ -18,6 +18,7 @@
 
 #include "cmdline.h"
 #include "path.h"
+#include "log.h"
 #include "conf.h"
 #include "decoder_list.h"
 #include "config.h"
@@ -123,6 +124,10 @@ void parseOptions(int argc, char **argv, Options *options)
 	if (option_version)
 		version();
 
+	/* initialize the logging library, so the configuration file
+	   parser can use it already */
+	log_early_init(options->verbose);
+
 	if (option_create_db && option_no_create_db)
 		g_error("Cannot use both --create-db and --no-create-db\n");
 

src/log.c

@@ -217,6 +217,15 @@ parse_log_level(const char *value, unsigned line)
 	}
 }
 
+void
+log_early_init(bool verbose)
+{
+	if (verbose)
+		log_threshold = G_LOG_LEVEL_DEBUG;
+
+	log_init_stdout();
+}
+
 void log_init(bool verbose, bool use_stdout)
 {
 	const struct config_param *param;

src/log.h

@@ -25,6 +25,17 @@
 G_GNUC_PRINTF(1, 2) void DEBUG(const char *fmt, ...);
 G_GNUC_PRINTF(1, 2) G_GNUC_NORETURN void FATAL(const char *fmt, ...);
 
+/**
+ * Configure a logging destination for daemon startup, before the
+ * configuration file is read.  This allows the daemon to use the
+ * logging library (and the command line verbose level) before it's
+ * daemonized.
+ *
+ * @param verbose true when the program is started with --verbose
+ */
+void
+log_early_init(bool verbose);
+
 void log_init(bool verbose, bool use_stdout);
 
 void setup_log_output(bool use_stdout);