log xml/xslt parsing failure messages via error log. This applies to both the

xsl files and the icecast xml file when re-read. At icecast startup, the logs
are not open so these parsing messages still go to stderr.

svn path=/icecast/trunk/icecast/; revision=9758

src/event.c

@@ -35,6 +35,7 @@ void event_config_read(void *arg)
 
     config = config_grab_config(); /* Both to get the lock, and to be able
                                      to find out the config filename */
+    xmlSetGenericErrorFunc ("config", log_parse_failure);
     ret = config_parse_file(config->config_filename, &new_config);
     if(ret < 0) {
         ERROR0("Error parsing config, not replacing existing config");

src/logging.c

@@ -188,6 +188,20 @@ void logging_playlist(const char *mount, const char *metadata, long listeners)
 }
 
 
+void log_parse_failure (void *ctx, const char *fmt, ...)
+{
+    char line [200];
+    va_list ap;
+    char *eol;
+
+    va_start (ap, fmt);
+    vsnprintf (line, sizeof (line), fmt, ap);
+    eol = strrchr (line, '\n');
+    if (eol) *eol='\0';
+    va_end (ap);
+    log_write (errorlog, 2, (char*)ctx, "", "%s", line);
+}
+
 
 void restart_logging (ice_config_t *config)
 {

src/logging.h

@@ -95,6 +95,7 @@ extern int playlistlog;
 void logging_access(client_t *client);
 void logging_playlist(const char *mount, const char *metadata, long listeners);
 void restart_logging (ice_config_t *config);
+void log_parse_failure (void *ctx, const char *fmt, ...);
 
 #endif  /* __LOGGING_H__ */
 

src/xslt.c

@@ -190,6 +190,9 @@ void xslt_transform(xmlDocPtr doc, const char *xslfilename, client_t *client)
     xmlChar *string;
     int len, problem = 0;
 
+    xmlSetGenericErrorFunc ("", log_parse_failure);
+    xsltSetGenericErrorFunc ("", log_parse_failure);
+
     thread_mutex_lock(&xsltlock);
     cur = xslt_get_stylesheet(xslfilename);