info: new applet

so far it only lists installed packages

src/info.c

@@ -0,0 +1,43 @@
+/* info.c - Alpine Package Keeper (APK)
+ *
+ * Copyright (C) 2005-2009 Natanael Copa <n@tanael.org>
+ * Copyright (C) 2009 Timo Teräs <timo.teras@iki.fi>
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it 
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation. See http://www.gnu.org/ for details.
+ */
+
+#include <stdio.h>
+#include "apk_defines.h"
+#include "apk_applet.h"
+#include "apk_database.h"
+
+static int info_main(int argc, char **argv)
+{
+	struct apk_database db;
+	struct apk_package *pkg;
+
+	if (apk_db_open(&db, apk_root) < 0)
+		return -1;
+
+	list_for_each_entry(pkg, &db.installed.packages, installed_pkgs_list) {
+		printf("%s", pkg->name->name);
+		if (!apk_quiet) 
+			printf(" %s", pkg->version);
+		printf("\n");
+	}
+
+	apk_db_close(&db);
+	return 0;
+}
+
+static struct apk_applet apk_info = {
+	.name = "info",
+	.usage = "",
+	.main = info_main,
+};
+
+APK_DEFINE_APPLET(apk_info);
+