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diff --git a/www/c3ref/temp_directory.html b/www/c3ref/temp_directory.html new file mode 100644 index 0000000..0930e62 --- /dev/null +++ b/www/c3ref/temp_directory.html @@ -0,0 +1,183 @@ +<!DOCTYPE html> +<html><head> +<meta name="viewport" content="width=device-width, initial-scale=1.0"> +<meta http-equiv="content-type" content="text/html; charset=UTF-8"> +<link href="../sqlite.css" rel="stylesheet"> +<title>Name Of The Folder Holding Temporary Files</title> +<!-- path=../ --> +</head> +<body> +<div class=nosearch> +<a href="../index.html"> +<img class="logo" src="../images/sqlite370_banner.gif" alt="SQLite" border="0"> +</a> +<div><!-- IE hack to prevent disappearing logo --></div> +<div class="tagline desktoponly"> +Small. Fast. Reliable.<br>Choose any three. +</div> +<div class="menu mainmenu"> +<ul> +<li><a href="../index.html">Home</a> +<li class='mobileonly'><a href="javascript:void(0)" onclick='toggle_div("submenu")'>Menu</a> +<li class='wideonly'><a href='../about.html'>About</a> +<li class='desktoponly'><a href="../docs.html">Documentation</a> +<li class='desktoponly'><a href="../download.html">Download</a> +<li class='wideonly'><a href='../copyright.html'>License</a> +<li class='desktoponly'><a href="../support.html">Support</a> +<li class='desktoponly'><a href="../prosupport.html">Purchase</a> +<li class='search' id='search_menubutton'> +<a href="javascript:void(0)" onclick='toggle_search()'>Search</a> +</ul> +</div> +<div class="menu submenu" id="submenu"> +<ul> +<li><a href='../about.html'>About</a> +<li><a href='../docs.html'>Documentation</a> +<li><a href='../download.html'>Download</a> +<li><a href='../support.html'>Support</a> +<li><a href='../prosupport.html'>Purchase</a> +</ul> +</div> +<div class="searchmenu" id="searchmenu"> +<form method="GET" action="../search"> +<select name="s" id="searchtype"> +<option value="d">Search Documentation</option> +<option value="c">Search Changelog</option> +</select> +<input type="text" name="q" id="searchbox" value=""> +<input type="submit" value="Go"> +</form> +</div> +</div> +<script> +function toggle_div(nm) { +var w = document.getElementById(nm); +if( w.style.display=="block" ){ +w.style.display = "none"; +}else{ +w.style.display = "block"; +} +} +function toggle_search() { +var w = document.getElementById("searchmenu"); +if( w.style.display=="block" ){ +w.style.display = "none"; +} else { +w.style.display = "block"; +setTimeout(function(){ +document.getElementById("searchbox").focus() +}, 30); +} +} +function div_off(nm){document.getElementById(nm).style.display="none";} +window.onbeforeunload = function(e){div_off("submenu");} +/* Disable the Search feature if we are not operating from CGI, since */ +/* Search is accomplished using CGI and will not work without it. */ +if( !location.origin || !location.origin.match || !location.origin.match(/http/) ){ +document.getElementById("search_menubutton").style.display = "none"; +} +/* Used by the Hide/Show button beside syntax diagrams, to toggle the */ +function hideorshow(btn,obj){ +var x = document.getElementById(obj); +var b = document.getElementById(btn); +if( x.style.display!='none' ){ +x.style.display = 'none'; +b.innerHTML='show'; +}else{ +x.style.display = ''; +b.innerHTML='hide'; +} +return false; +} +var antiRobot = 0; +function antiRobotGo(){ +if( antiRobot!=3 ) return; +antiRobot = 7; +var j = document.getElementById("mtimelink"); +if(j && j.hasAttribute("data-href")) j.href=j.getAttribute("data-href"); +} +function antiRobotDefense(){ +document.body.onmousedown=function(){ +antiRobot |= 2; +antiRobotGo(); +document.body.onmousedown=null; +} +document.body.onmousemove=function(){ +antiRobot |= 2; +antiRobotGo(); +document.body.onmousemove=null; +} +setTimeout(function(){ +antiRobot |= 1; +antiRobotGo(); +}, 100) +antiRobotGo(); +} +antiRobotDefense(); +</script> +<!-- keywords: sqlite3_temp_directory --> +<div class=nosearch> +<a href="intro.html"><h2>SQLite C Interface</h2></a> +<h2>Name Of The Folder Holding Temporary Files</h2> +</div> +<blockquote><pre> +SQLITE_EXTERN char *sqlite3_temp_directory; +</pre></blockquote> +<p> +If this global variable is made to point to a string which is +the name of a folder (a.k.a. directory), then all temporary files +created by SQLite when using a built-in <a href="../c3ref/vfs.html">VFS</a> +will be placed in that directory. If this variable +is a NULL pointer, then SQLite performs a search for an appropriate +temporary file directory.</p> + +<p>Applications are strongly discouraged from using this global variable. +It is required to set a temporary folder on Windows Runtime (WinRT). +But for all other platforms, it is highly recommended that applications +neither read nor write this variable. This global variable is a relic +that exists for backwards compatibility of legacy applications and should +be avoided in new projects.</p> + +<p>It is not safe to read or modify this variable in more than one +thread at a time. It is not safe to read or modify this variable +if a <a href="../c3ref/sqlite3.html">database connection</a> is being used at the same time in a separate +thread. +It is intended that this variable be set once +as part of process initialization and before any SQLite interface +routines have been called and that this variable remain unchanged +thereafter.</p> + +<p>The <a href="../pragma.html#pragma_temp_store_directory">temp_store_directory pragma</a> may modify this variable and cause +it to point to memory obtained from <a href="../c3ref/free.html">sqlite3_malloc</a>. Furthermore, +the <a href="../pragma.html#pragma_temp_store_directory">temp_store_directory pragma</a> always assumes that any string +that this variable points to is held in memory obtained from +<a href="../c3ref/free.html">sqlite3_malloc</a> and the pragma may attempt to free that memory +using <a href="../c3ref/free.html">sqlite3_free</a>. +Hence, if this variable is modified directly, either it should be +made NULL or made to point to memory obtained from <a href="../c3ref/free.html">sqlite3_malloc</a> +or else the use of the <a href="../pragma.html#pragma_temp_store_directory">temp_store_directory pragma</a> should be avoided. +Except when requested by the <a href="../pragma.html#pragma_temp_store_directory">temp_store_directory pragma</a>, SQLite +does not free the memory that sqlite3_temp_directory points to. If +the application wants that memory to be freed, it must do +so itself, taking care to only do so after all <a href="../c3ref/sqlite3.html">database connection</a> +objects have been destroyed.</p> + +<p><b>Note to Windows Runtime users:</b> The temporary directory must be set +prior to calling <a href="../c3ref/open.html">sqlite3_open</a> or <a href="../c3ref/open.html">sqlite3_open_v2</a>. Otherwise, various +features that require the use of temporary files may fail. Here is an +example of how to do this using C++ with the Windows Runtime:</p> + +<p><blockquote><pre> +LPCWSTR zPath = Windows::Storage::ApplicationData::Current-> + TemporaryFolder->Path->Data(); +char zPathBuf[MAX_PATH + 1]; +memset(zPathBuf, 0, sizeof(zPathBuf)); +WideCharToMultiByte(CP_UTF8, 0, zPath, -1, zPathBuf, sizeof(zPathBuf), + NULL, NULL); +sqlite3_temp_directory = sqlite3_mprintf("%s", zPathBuf); +</pre></blockquote> +</p><p>See also lists of + <a href="objlist.html">Objects</a>, + <a href="constlist.html">Constants</a>, and + <a href="funclist.html">Functions</a>.</p> + |