138 lines
5.3 KiB
HTML
138 lines
5.3 KiB
HTML
<!DOCTYPE html>
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<html><head>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<link href="../sqlite.css" rel="stylesheet">
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<title>Name Of The Folder Holding Database Files</title>
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<!-- path=../ -->
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</head>
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<body>
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<div class=nosearch>
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<a href="../index.html">
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<img class="logo" src="../images/sqlite370_banner.gif" alt="SQLite" border="0">
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</a>
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<div><!-- IE hack to prevent disappearing logo --></div>
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<div class="tagline desktoponly">
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Small. Fast. Reliable.<br>Choose any three.
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</div>
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<div class="menu mainmenu">
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<ul>
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<li><a href="../index.html">Home</a>
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<li class='mobileonly'><a href="javascript:void(0)" onclick='toggle_div("submenu")'>Menu</a>
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<li class='wideonly'><a href='../about.html'>About</a>
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<li class='desktoponly'><a href="../docs.html">Documentation</a>
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<li class='desktoponly'><a href="../download.html">Download</a>
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<li class='wideonly'><a href='../copyright.html'>License</a>
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<li class='desktoponly'><a href="../support.html">Support</a>
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<li class='desktoponly'><a href="../prosupport.html">Purchase</a>
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<li class='search' id='search_menubutton'>
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<a href="javascript:void(0)" onclick='toggle_search()'>Search</a>
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</ul>
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</div>
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<div class="menu submenu" id="submenu">
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<ul>
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<li><a href='../about.html'>About</a>
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<li><a href='../docs.html'>Documentation</a>
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<li><a href='../download.html'>Download</a>
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<li><a href='../support.html'>Support</a>
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<li><a href='../prosupport.html'>Purchase</a>
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</ul>
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</div>
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<div class="searchmenu" id="searchmenu">
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<form method="GET" action="../search">
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<select name="s" id="searchtype">
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<option value="d">Search Documentation</option>
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<option value="c">Search Changelog</option>
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</select>
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<input type="text" name="q" id="searchbox" value="">
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<input type="submit" value="Go">
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</form>
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</div>
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</div>
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<script>
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function toggle_div(nm) {
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var w = document.getElementById(nm);
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if( w.style.display=="block" ){
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w.style.display = "none";
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}else{
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w.style.display = "block";
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}
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}
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function toggle_search() {
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var w = document.getElementById("searchmenu");
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if( w.style.display=="block" ){
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w.style.display = "none";
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} else {
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w.style.display = "block";
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setTimeout(function(){
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document.getElementById("searchbox").focus()
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}, 30);
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}
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}
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function div_off(nm){document.getElementById(nm).style.display="none";}
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window.onbeforeunload = function(e){div_off("submenu");}
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/* Disable the Search feature if we are not operating from CGI, since */
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/* Search is accomplished using CGI and will not work without it. */
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if( !location.origin || !location.origin.match || !location.origin.match(/http/) ){
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document.getElementById("search_menubutton").style.display = "none";
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}
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/* Used by the Hide/Show button beside syntax diagrams, to toggle the */
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function hideorshow(btn,obj){
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var x = document.getElementById(obj);
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var b = document.getElementById(btn);
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if( x.style.display!='none' ){
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x.style.display = 'none';
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b.innerHTML='show';
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}else{
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x.style.display = '';
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b.innerHTML='hide';
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}
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return false;
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}
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</script>
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</div>
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<!-- keywords: sqlite3_data_directory -->
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<div class=nosearch>
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<a href="intro.html"><h2>SQLite C Interface</h2></a>
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<h2>Name Of The Folder Holding Database Files</h2>
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</div>
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<blockquote><pre>
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SQLITE_EXTERN char *sqlite3_data_directory;
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</pre></blockquote>
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<p>
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If this global variable is made to point to a string which is
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the name of a folder (a.k.a. directory), then all database files
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specified with a relative pathname and created or accessed by
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SQLite when using a built-in windows <a href="../c3ref/vfs.html">VFS</a> will be assumed
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to be relative to that directory. If this variable is a NULL
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pointer, then SQLite assumes that all database files specified
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with a relative pathname are relative to the current directory
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for the process. Only the windows VFS makes use of this global
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variable; it is ignored by the unix VFS.</p>
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<p>Changing the value of this variable while a database connection is
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open can result in a corrupt database.</p>
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<p>It is not safe to read or modify this variable in more than one
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thread at a time. It is not safe to read or modify this variable
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if a <a href="../c3ref/sqlite3.html">database connection</a> is being used at the same time in a separate
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thread.
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It is intended that this variable be set once
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as part of process initialization and before any SQLite interface
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routines have been called and that this variable remain unchanged
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thereafter.</p>
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<p>The <a href="../pragma.html#pragma_data_store_directory">data_store_directory pragma</a> may modify this variable and cause
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it to point to memory obtained from <a href="../c3ref/free.html">sqlite3_malloc</a>. Furthermore,
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the <a href="../pragma.html#pragma_data_store_directory">data_store_directory pragma</a> always assumes that any string
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that this variable points to is held in memory obtained from
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<a href="../c3ref/free.html">sqlite3_malloc</a> and the pragma may attempt to free that memory
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using <a href="../c3ref/free.html">sqlite3_free</a>.
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Hence, if this variable is modified directly, either it should be
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made NULL or made to point to memory obtained from <a href="../c3ref/free.html">sqlite3_malloc</a>
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or else the use of the <a href="../pragma.html#pragma_data_store_directory">data_store_directory pragma</a> should be avoided.
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</p><p>See also lists of
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<a href="objlist.html">Objects</a>,
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<a href="constlist.html">Constants</a>, and
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<a href="funclist.html">Functions</a>.</p>
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