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/* This file is part of NSsync 
   Copyright (C) 2011 Sergey Poznyakoff
  
   NSsync 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 3, or (at your option)
   any later version.
  
   NSsync 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 NSsync.  If not, see <http://www.gnu.org/licenses/>. */

#include "nssync.h"

char *named_conf_file;
struct grecs_list *bind_include_path;

static struct grecs_node *bind_tree;

void
source_named_conf()
{
	grecs_include_path_clear();
	if (bind_include_path) {
		struct grecs_list_entry *ep;
		
		for (ep = bind_include_path->head; ep; ep = ep->next)
			grecs_preproc_add_include_dir(grecs_strdup(ep->data));
	}
		
	grecs_parser_fun = grecs_bind_parser;
	if (!named_conf_file)
		named_conf_file = "/etc/named.conf";
	bind_tree = grecs_parse(named_conf_file);
	if (!bind_tree)
		exit(EX_UNAVAILABLE);
}

const char *
bindcf_lookup(struct nssync *sp)
{
	const char *name;
	struct grecs_node *node = grecs_find_node(bind_tree, sp->kwpath);
	if (!node) {
		error("%s: keyword %s not found in %s",
		      sp->tag, sp->kwpath, named_conf_file);
		return NULL;
	}
	if (!node->v.value) {
		error("%s: no value for %s",
		      sp->tag, sp->kwpath);
		return NULL;
	}
	if (node->v.value->type != GRECS_TYPE_STRING) {
		error("%s: %s is not a string",
		      sp->tag, sp->kwpath);
		return NULL;
	}
	debug(2, ("%s: found %s at %s:%d",
		  sp->tag, sp->kwpath, node->locus.file, node->locus.line));

	name = node->v.value->v.string;
	if (name[0] != '/') {
		char *p = grecs_find_include_file(name, 1);
		if (!p) {
			if (errno == ENOENT) {
				if (bind_include_path) {
					size_t s = 0;
					
					grecs_asprintf(&p, &s,
						       "%s/%s",
						       bind_include_path->head->data,
						       name);
				} 
			}

			if (!p) {
				error("%s: cannot find absolute name for %s: %s",
				      sp->tag, name, strerror(errno));
				return NULL;
			}
		}
		name = p;
	}
	return name;
}

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