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

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);
+}

src/logging.h

@@ -0,0 +1,58 @@
+/*
+    logging.h -- header for logging.c
+    Copyright (C) 2002 Guus Sliepen <guus@sliepen.warande.net>,
+                  2002 Ivo Timmermans <ivo@o2w.nl>
+
+    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.h,v 1.1 2002/04/13 10:25:38 zarq Exp $
+*/
+
+#ifndef __TINC_LOGGING_H__
+#define __TINC_LOGGING_H__
+
+#include <stdarg.h>
+
+enum {
+  TLOG_DEBUG,
+  TLOG_INFO,
+  TLOG_NOTICE,
+  TLOG_ERROR,
+  TLOG_CRITICAL
+};
+
+enum {
+  DEBUG_NOTHING = 0,		/* Quiet mode, only show starting/stopping of the daemon */
+  DEBUG_CONNECTIONS = 1,	/* Show (dis)connects of other tinc daemons via TCP */
+  DEBUG_ERROR = 2,		/* Show error messages received from other hosts */
+  DEBUG_STATUS = 2,		/* Show status messages received from other hosts */
+  DEBUG_PROTOCOL = 3,		/* Show the requests that are sent/received */
+  DEBUG_META = 4,		/* Show contents of every request that is sent/received */
+  DEBUG_TRAFFIC = 5,		/* Show network traffic information */
+  DEBUG_PACKET = 6,		/* Show contents of each packet that is being sent/received */
+  DEBUG_SCARY_THINGS = 10	/* You have been warned */
+};
+
+typedef void (log_function_t)(int,int,char*,va_list);
+
+extern int debug_lvl;
+extern avl_tree_t *log_hooks_tree;
+
+extern void log_message(int, int, char *, ...);
+extern void log_add_hook(log_function_t *);
+extern void log_del_hook(log_function_t *);
+extern log_function_t log_default_hook;
+
+#endif /* __TINC_LOGGING_H__ */

src/process.c

@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: process.c,v 1.2 2002/04/09 15:26:00 zarq Exp $
+    $Id: process.c,v 1.3 2002/04/13 10:25:38 zarq Exp $
 */
 
 #include "config.h"
@@ -189,8 +189,10 @@ cp
       if(!write_pid(pidfilename))
         return -1;
     }
-  
+
   openlog(identname, LOG_CONS | LOG_PID, LOG_DAEMON);
+  log_add_hook(log_syslog);
+  log_del_hook(log_default);
 
   if(debug_lvl > DEBUG_NOTHING)
     syslog(LOG_NOTICE, _("tincd %s (%s %s) starting, debug level %d"),

src/tincd.c

@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: tincd.c,v 1.12 2002/04/09 15:26:01 zarq Exp $
+    $Id: tincd.c,v 1.13 2002/04/13 10:25:38 zarq Exp $
 */
 
 #include "config.h"
@@ -338,11 +338,7 @@ main(int argc, char **argv, char **envp)
   if(show_help)
     usage(0);
 
-#ifdef HAVE_SOLARIS
-  openlog("tinc", LOG_CONS, LOG_DAEMON);        /* Catch all syslog() calls issued before detaching */
-#else
-  openlog("tinc", LOG_PERROR, LOG_DAEMON);      /* Catch all syslog() calls issued before detaching */
-#endif
+  log_add_hook(log_default);
 
   g_argv = argv;