logfile plugin: Implemented an option to prefix logged lines with a timestamp.

diff --git a/src/collectd.conf.pod b/src/collectd.conf.pod
index dc9d8bc..ab31e01 100644 (file)
--- a/src/collectd.conf.pod
+++ b/src/collectd.conf.pod
@@ -371,6 +371,10 @@ B<stderr> can be used to write to the standard output and standard error
 channels, respectively. This, of course, only makes much sense when collectd is
 running in foreground- or non-daemon-mode.
 
+=item B<Timestamp> B<true>|B<false>
+
+Prefix all lines printed by the current time. Defaults to B<true>.
+
 =back
 
 =head2 Plugin C<mbmon>

diff --git a/src/logfile.c b/src/logfile.c
index 102f12b..03c2f92 100644 (file)
--- a/src/logfile.c
+++ b/src/logfile.c
@@ -35,11 +35,13 @@ static int log_level = LOG_INFO;
 static pthread_mutex_t file_lock = PTHREAD_MUTEX_INITIALIZER;
 
 static char *log_file = NULL;
+static int print_timestamp = 1;
 
 static const char *config_keys[] =
 {
        "LogLevel",
-       "File"
+       "File",
+       "Timestamp"
 };
 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
 
@@ -68,6 +70,14 @@ static int logfile_config (const char *key, const char *value)
                sfree (log_file);
                log_file = strdup (value);
        }
+       else if (0 == strcasecmp (key, "File")) {
+               if ((strcasecmp (value, "false") == 0)
+                               || (strcasecmp (value, "no") == 0)
+                               || (strcasecmp (value, "off") == 0))
+                       print_timestamp = 0;
+               else
+                       print_timestamp = 1;
+       }
        else {
                return -1;
        }
@@ -78,10 +88,23 @@ static void logfile_log (int severity, const char *msg)
 {
        FILE *fh;
        int do_close = 0;
+       time_t timestamp_time;
+       struct tm timestamp_tm;
+       char timestamp_str[64];
 
        if (severity > log_level)
                return;
 
+       if (print_timestamp)
+       {
+               timestamp_time = time (NULL);
+               localtime_r (&timestamp_time, &timestamp_tm);
+
+               strftime (timestamp_str, sizeof (timestamp_str), "%Y-%m-%d %H:%M:%S",
+                               &timestamp_tm);
+               timestamp_str[sizeof (timestamp_str) - 1] = '\0';
+       }
+
        pthread_mutex_lock (&file_lock);
 
        if ((log_file == NULL) || (strcasecmp (log_file, "stderr") == 0))
@@ -103,7 +126,11 @@ static void logfile_log (int severity, const char *msg)
        }
        else
        {
-               fprintf (fh, "%s\n", msg);
+               if (print_timestamp)
+                       fprintf (fh, "[%s] %s\n", timestamp_str, msg);
+               else
+                       fprintf (fh, "%s\n", msg);
+
                if (do_close != 0)
                        fclose (fh);
        }