Dump through control socket

[tinc] / src / graph.c

diff --git a/src/graph.c b/src/graph.c
index 5bf6361..e6d70af 100644 (file)
--- a/src/graph.c
+++ b/src/graph.c
@@ -313,66 +313,37 @@ void sssp_bfs(void) {
    dot -Tpng graph_filename -o image_filename.png -Gconcentrate=true
 */
 
-static void dump_graph(int fd, short events, void *data) {
+int dump_graph(struct evbuffer *out) {
        splay_node_t *node;
        node_t *n;
        edge_t *e;
-       char *filename = NULL, *tmpname = NULL;
-       FILE *file;
-       
-       if(!get_config_string(lookup_config(config_tree, "GraphDumpFile"), &filename))
-               return;
 
-       ifdebug(PROTOCOL) logger(LOG_NOTICE, "Dumping graph");
-       
-       if(filename[0] == '|') {
-               file = popen(filename + 1, "w");
-       } else {
-               asprintf(&tmpname, "%s.new", filename);
-               file = fopen(tmpname, "w");
-       }
-
-       if(!file) {
-               logger(LOG_ERR, "Unable to open graph dump file %s: %s", filename, strerror(errno));
-               free(tmpname);
-               return;
-       }
-
-       fprintf(file, "digraph {\n");
+       if(evbuffer_add_printf(out, "digraph {\n") == -1)
+               return errno;
        
        /* dump all nodes first */
        for(node = node_tree->head; node; node = node->next) {
                n = node->data;
-               fprintf(file, " %s [label = \"%s\"];\n", n->name, n->name);
+               if(evbuffer_add_printf(out, "   %s [label = \"%s\"];\n",
+                                                          n->name, n->name) == -1)
+                       return errno;
        }
 
        /* now dump all edges */
        for(node = edge_weight_tree->head; node; node = node->next) {
                e = node->data;
-               fprintf(file, " %s -> %s;\n", e->from->name, e->to->name);
+               if(evbuffer_add_printf(out, "   %s -> %s;\n",
+                                                          e->from->name, e->to->name) == -1)
+                       return errno;
        }
 
-       fprintf(file, "}\n");   
-       
-       if(filename[0] == '|') {
-               pclose(file);
-       } else {
-               fclose(file);
-#ifdef HAVE_MINGW
-               unlink(filename);
-#endif
-               rename(tmpname, filename);
-               free(tmpname);
-       }
+       if(evbuffer_add_printf(out, "}\n") == -1)
+               return errno;
+
+       return 0;
 }
 
 void graph(void) {
-       static struct event ev;
-
        sssp_bfs();
        mst_kruskal();
-
-       if(!timeout_initialized(&ev))
-               timeout_set(&ev, dump_graph, NULL);
-       event_add(&ev, &(struct timeval){5, 0});
 }