logfile: send log messages to STDERR by default

This prevents early startup log messages from going unnoticed if the
default logfile isn't writeable.

Fixes: #2057

diff --git a/src/logfile.c b/src/logfile.c
index e51c9db..ef3aa97 100644 (file)
--- a/src/logfile.c
+++ b/src/logfile.c
@@ -31,8 +31,6 @@
 #include "common.h"
 #include "plugin.h"
 
-#define DEFAULT_LOGFILE LOCALSTATEDIR "/log/collectd.log"
-
 #if COLLECT_DEBUG
 static int log_level = LOG_DEBUG;
 #else
@@ -118,8 +116,7 @@ static void logfile_print(const char *msg, int severity,
   pthread_mutex_lock(&file_lock);
 
   if (log_file == NULL) {
-    fh = fopen(DEFAULT_LOGFILE, "a");
-    do_close = 1;
+    fh = stderr;
   } else if (strcasecmp(log_file, "stderr") == 0)
     fh = stderr;
   else if (strcasecmp(log_file, "stdout") == 0)
@@ -131,8 +128,7 @@ static void logfile_print(const char *msg, int severity,
 
   if (fh == NULL) {
     char errbuf[1024];
-    fprintf(stderr, "logfile plugin: fopen (%s) failed: %s\n",
-            (log_file == NULL) ? DEFAULT_LOGFILE : log_file,
+    fprintf(stderr, "logfile plugin: fopen (%s) failed: %s\n", log_file,
             sstrerror(errno, errbuf, sizeof(errbuf)));
   } else {
     if (print_timestamp)