New logging system to replace syslog() calls with a generic function.

[tinc] / src / logging.c

diff --git a/src/logging.c b/src/logging.c
new file mode 100644 (file)
index 0000000..983bdfa
--- /dev/null
+++ b/src/logging.c
@@ -0,0 +1,86 @@
+/*
+    logging.c -- log messages to e.g. syslog
+    Copyright (C) 2001-2002 Guus Sliepen <guus@sliepen.warande.net>,
+                  2001-2002 Ivo Timmermans <itimmermans@bigfoot.com>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+    $Id: logging.c,v 1.1 2002/04/13 10:25:38 zarq Exp $
+*/
+
+#include "config.h"
+
+#include <assert.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <syslog.h>
+
+#include <avl_tree.h>
+
+#include "logging.h"
+
+avl_tree_t *log_hooks_tree = NULL;
+
+int debug_lvl = 0;
+
+int log_compare(const void *a, const void *b)
+{
+  if(a < b)
+    return -1;
+  if(a > b)
+    return 1;
+  return 0;
+}
+
+void log_message(int level, int priority, char *fmt, ...)
+{
+  avl_node_t *avlnode;
+  va_list args;
+
+  va_start(args, fmt);
+  for(avlnode = log_hooks_tree->head; avlnode; avlnode = avlnode->next)
+    {
+      assert(avlnode->data);
+      ((log_function_t*)(avlnode->data))(level, priority, fmt, args);
+    }
+  va_end(args);
+}
+
+void log_add_hook(log_function_t *fn)
+{
+  if(!log_hooks_tree)
+    log_hooks_tree = avl_alloc_tree(log_compare, NULL);
+
+  avl_insert(log_hooks_tree, (void*)fn);
+}
+
+void log_del_hook(log_function_t *fn)
+{
+  avl_delete(log_hooks_tree, (void*)fn);
+}
+
+void log_default(int level, int priority, char *fmt, va_list ap)
+{
+  if(debug_lvl >= level)
+    vfprintf(stderr, fmt, ap);
+}
+
+void log_syslog(int level, int priority, char *fmt, va_list ap)
+{
+  int priorities[] = { LOG_DEBUG, LOG_INFO, LOG_NOTICE, LOG_ERR, LOG_CRIT };
+
+  if(debug_lvl >= level)
+    vsyslog(priorities[priority], fmt, ap);
+}