<!-- This comment will put IE 6, 7 and 8 in quirks mode --> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <title>ALSA project - the C library reference: Hooks in configuration files</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="search/search.css" rel="stylesheet" type="text/css"/> <script type="text/javaScript" src="search/search.js"></script> <link href="doxygen.css" rel="stylesheet" type="text/css"/> </head> <body onload='searchBox.OnSelectItem(0);'> <!-- Generated by Doxygen 1.6.3 --> <script type="text/javascript"><!-- var searchBox = new SearchBox("searchBox", "search",false,'Search'); --></script> <div class="navigation" id="top"> <div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li class="current"><a href="pages.html"><span>Related Pages</span></a></li> <li><a href="modules.html"><span>Modules</span></a></li> <li><a href="annotated.html"><span>Data Structures</span></a></li> <li><a href="files.html"><span>Files</span></a></li> <li><a href="examples.html"><span>Examples</span></a></li> <li> <div id="MSearchBox" class="MSearchBoxInactive"> <img id="MSearchSelect" src="search/search.png" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()" alt=""/> <input type="text" id="MSearchField" value="Search" accesskey="S" onfocus="searchBox.OnSearchFieldFocus(true)" onblur="searchBox.OnSearchFieldFocus(false)" onkeyup="searchBox.OnSearchFieldChange(event)"/> <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a> </div> </li> </ul> </div> </div> <div class="contents"> <h1><a class="anchor" id="confhooks">Hooks in configuration files </a></h1><p>The hook extension in the ALSA library allows expansion of configuration nodes at run-time. The existence of a hook is determined by the presence of a @hooks compound node.</p> <p>This example defines a hook which loads two configuration files at the beginning:</p> <div class="fragment"><pre class="fragment">@hooks [ { func load files [ <span class="stringliteral">"/etc/asound.conf"</span> <span class="stringliteral">"~/.asoundrc"</span> ] errors <span class="keyword">false</span> } ] </pre></div><h2><a class="anchor" id="confhooks_ref"> Function reference</a></h2> <ul> <li> The function load - <code><a class="el" href="conf_8c.html#a4008d77ad63047366463350b7726a5ec" title="Loads and parses the given configurations files.">snd_config_hook_load()</a></code> - loads and parses the given configuration files. </li> <li> The function load_for_all_cards - <code><a class="el" href="conf_8c.html#ac64a8c73293ee35ed3f3958d47bdc721" title="Loads and parses the given configurations files for each installed sound card.">snd_config_hook_load_for_all_cards()</a></code> - loads and parses the given configuration files for each installed sound card. 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