[conf/logger] Log error message from libconfuse in forked-daapd log

src/conffile.c

@@ -206,6 +206,19 @@ uid_t runas_uid;
 gid_t runas_gid;
 
 
+static void
+logger_confuse(cfg_t *cfg, const char *format, va_list args)
+{
+  char fmt[80];
+
+  if (cfg && cfg->name && cfg->line)
+    snprintf(fmt, sizeof(fmt), "[%s:%d] %s\n", cfg->name, cfg->line, format);
+  else
+    snprintf(fmt, sizeof(fmt), "%s\n", format);
+
+  DVPRINTF(E_LOG, L_CONF, fmt, args);
+}
+
 static int
 cb_loglevel(cfg_t *cfg, cfg_opt_t *opt, const char *value, void *result)
 {
@@ -355,6 +368,8 @@ conffile_load(char *file)
 
   cfg = cfg_init(toplvl_cfg, CFGF_NONE);
 
+  cfg_set_error_function(cfg, logger_confuse);
+
   ret = cfg_parse(cfg, file);
 
   if (ret == CFG_FILE_ERROR)

src/logger.c

@@ -174,6 +174,17 @@ DPRINTF(int severity, int domain, const char *fmt, ...)
   va_end(ap);
 }
 
+void
+DVPRINTF(int severity, int domain, const char *fmt, va_list ap)
+{
+  // If domain and severity do not match the current log configuration, return early to
+  // safe some unnecessary code execution (tiny performance gain)
+  if (logger_initialized && (!((1 << domain) & logdomains) || (severity > threshold)))
+    return;
+
+  vlogger(severity, domain, fmt, ap);
+}
+
 void
 logger_ffmpeg(void *ptr, int level, const char *fmt, va_list ap)
 {

src/logger.h

@@ -52,6 +52,9 @@
 void
 DPRINTF(int severity, int domain, const char *fmt, ...) __attribute__((format(printf, 3, 4)));
 
+void
+DVPRINTF(int severity, int domain, const char *fmt, va_list ap);
+
 void
 logger_ffmpeg(void *ptr, int level, const char *fmt, va_list ap);