2 /**************************************************************************
3 ** (c) Copyright 2002, Andromeda Technology & Automation
4 ** This is free software; you can redistribute it and/or modify it under the
5 ** terms of the GNU General Public License, see the file COPYING.
6 ***************************************************************************/
10 ///////////////////////////////////////////////////////////////////////////
11 // NAME : configuration
17 // DESCRIPTION : Handle configurational parameters for the application.
18 // Many applications need some permanently stored configurational
19 // data. The information is usually stored in two places: A system-
20 // wide configuration file and a configuration file per user.
21 // The content of the configuration file is in XML format.
22 // The configuration base class takes care of finding the configuration
23 // files, e.g. in /etc/app.conf or in /usr/loca/etc/app.conf
24 // The config files are parsed with the gnome XML parser and a
25 // framework is provided to find configurational items.
29 // LAST MODIFIED : Jul 29, 2002
30 ///////////////////////////////////////////////////////////////////////////
38 function configuration()
40 $this->system = false;
44 function xmlFindTag($node, $tag)
49 while (!$element && $i < sizeof($node))
51 if ($node[$i]->type == XML_ELEMENT_NODE && $node[$i]->tagname == $tag)
61 function read($app_name)
63 $this->system = false;
64 $filename = "/etc/" . $app_name . ".conf";
65 if (!is_readable($filename))
67 $filename = "/usr/local/etc/" . $app_name . ".conf";
69 if (is_readable($filename))
72 $this->system = xmldocfile($filename);
76 $root = $this->system->root();
78 if ($root->tagname != $app_name)
80 print("Configuration error: Wrong configuration file.<br>");
81 $this->system = false;
87 if (isset($_ENV['HOME']) && $_ENV['HOME'] != '/')
89 // Read configurations from the user's homedir.
91 $filename = $_ENV['HOME'] . "/." . $app_name . ".conf";
92 if (is_readable($filename))
95 $this->user = xmldocfile($filename);
99 $root = $this->user->root();
101 if ($root->tagname != $app_name)
103 print("Configuration error: Wrong configuration file.<br>");
111 if ($this->system == false && $this->user == false)
113 print("Configuration error: Configuration file for $app_name not found.<br>\n");
116 return $this->system != false || $this->user != false;
119 function find_parameter($section, $parameter)
125 $root_node = $this->system->root();
126 $section_node = $this->xmlFindTag($root_node->children(), $section);
129 $param_node = $this->xmlFindTag($section_node->children(), $parameter);
132 $param_node = $param_node->children();
134 if ($param_node && $param_node[0]->type == XML_TEXT_NODE)
136 $param_value = $param_node[0]->content;
141 // If the parameter is also defined in the user config, it will override
142 // the system-wide value.
146 $root_node = $this->user->root();
147 $section_node = $this->xmlFindTag($root_node->children(), $section);
150 $param_node = $this->xmlFindTag($section_node->children(), $parameter);
153 $param_node = $param_node->children();
155 if ($param_node && $param_node[0]->type == XML_TEXT_NODE)
157 $param_value = $param_node[0]->content;