treat empty string as NULL

2 files changed, 3 insertions, 2 deletions

diff --git a/src/util/common_logging.c b/src/util/common_logging.c
index d564530cc..101f2fd9f 100644
--- a/src/util/common_logging.c
+++ b/src/util/common_logging.c
@@ -546,7 +546,8 @@ GNUNET_log_setup (const char *comp, const char *loglevel, const char *logfile)
   component_nopid = GNUNET_strdup (comp);
 
   env_logfile = getenv ("GNUNET_FORCE_LOGFILE");
-  if (env_logfile != NULL)
+  if ( (env_logfile != NULL) &&
+       (strlen (env_logfile) > 0) )
     logfile = env_logfile;
 
   if (logfile == NULL)
diff --git a/src/util/test_common_logging_runtime_loglevels.c b/src/util/test_common_logging_runtime_loglevels.c
index 5c069dc9f..79b888c56 100644
--- a/src/util/test_common_logging_runtime_loglevels.c
+++ b/src/util/test_common_logging_runtime_loglevels.c
@@ -1,6 +1,6 @@
 /*
      This file is part of GNUnet.
-     (C) 2008 Christian Grothoff (and other contributing authors)
+     (C) 2011 Christian Grothoff (and other contributing authors)
 
      GNUnet is free software; you can redistribute it and/or modify
      it under the terms of the GNU General Public License as published