Added the ability to log all debug messages to a file.

Makefile.am

@@ -31,7 +31,7 @@ goaccess_SOURCES = \
    xmalloc.h       
 
 if DEBUG
-AM_CFLAGS = -O0 -g
+AM_CFLAGS = -DDEBUG -O0 -g
 else
 AM_CFLAGS = -O2
 endif

commons.h

@@ -46,4 +46,10 @@ extern size_t real_size_y;
 extern size_t term_h;
 extern size_t term_w;
 
+#ifdef DEBUG
+#define LOG_DEBUG(x, ...) do { dbg_fprintf x; } while (0)
+#else
+#define LOG_DEBUG(x, ...) do { } while (0)
+#endif
+
 #endif

error.c

@@ -34,6 +34,9 @@
 
 #include "error.h"
 #include "commons.h"
+#include "util.h"
+
+static FILE *log_file;
 
 void
 error_handler (const char *func, const char *file, int line, const char *msg)
@@ -47,3 +50,34 @@ error_handler (const char *func, const char *file, int line, const char *msg)
    fprintf (stderr, "\nMessage: %s\n\n", msg);
    exit (EXIT_FAILURE);
 }
+
+void
+dbg_log_open (const char *path)
+{
+   if (path != NULL) {
+      log_file = fopen (path, "w");
+      if (log_file == NULL)
+         return;
+   }
+}
+
+void
+dbg_log_close (void)
+{
+   if (log_file != NULL)
+      fclose (log_file);
+}
+
+void
+dbg_fprintf (const char *fmt, ...)
+{
+   va_list args;
+
+   if (!log_file)
+      return;
+
+   va_start (args, fmt);
+   vfprintf (log_file, fmt, args);
+   fflush (log_file);
+   va_end (args);
+}

error.h

@@ -28,4 +28,8 @@
 void error_handler (const char *func, const char *file, int line,
                     const char *msg);
 
+void dbg_fprintf (const char *fmt, ...);
+void dbg_log_open (const char *file);
+void dbg_log_close (void);
+
 #endif

goaccess.c

@@ -54,11 +54,20 @@
 #include "util.h"
 
 static WINDOW *header_win, *main_win;
+
 #ifdef HAVE_LIBGEOIP
+#ifdef DEBUG
+static char short_options[] = "f:e:p:o:l:acrmMghHqd";
+#else
 static char short_options[] = "f:e:p:o:acrmMghHqd";
+#endif
+#else
+#ifdef DEBUG
+static char short_options[] = "f:e:p:o:l:acrmMhHqd";
 #else
 static char short_options[] = "f:e:p:o:acrmMhHqd";
 #endif
+#endif
 
 GConf conf = { 0 };
 
@@ -152,6 +161,9 @@ cmd_help (void)
    printf ("                 HOST module. Disabled by default.\n");
 #ifdef HAVE_LIBGEOIP
    printf (" -g            - Standard GeoIP database for less memory usage.\n");
+#endif
+#ifdef DEBUG
+   printf (" -l            - Send all debug messages to the specified file.\n");
 #endif
    printf (" -h            - This help.\n");
    printf (" -H            - Include the HTTP request protocol.\n");
@@ -217,6 +229,12 @@ house_keeping (void)
    g_hash_table_destroy (ht_status_code);
    g_hash_table_destroy (ht_unique_vis);
    g_hash_table_destroy (ht_unique_visitors);
+
+   if (conf.debug_log) {
+      LOG_DEBUG (("Bye.\n"));
+      dbg_log_close ();
+      free (conf.debug_log);
+   }
 }
 
 /* allocate memory for an instance of holder */
@@ -790,6 +808,10 @@ main (int argc, char *argv[])
        case 'h':
           cmd_help ();
           break;
+       case 'l':
+          conf.debug_log = alloc_string (optarg);
+          dbg_log_open (conf.debug_log);
+          break;
        case 'H':
           conf.append_protocol = 1;
           break;

settings.h

@@ -49,18 +49,19 @@ typedef struct GConfKeyword_
 typedef struct GConf_
 {
    char *date_format;
+   char *debug_log;
    char *iconfigfile;
    char *ifile;
    char *ignore_host;
    char *log_format;
    char *output_format;
    int append_method;
+   int append_protocol;
    int bandwidth;
    int color_scheme;
    int enable_html_resolver;
    int geo_db;
    int ignore_qstr;
-   int append_protocol;
    int list_agents;
    int load_conf_dlg;
    int mouse_support;