vfs: check userland buffers before reading them.
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59 <h1>Tracker Add-Ons</h1>
61 <p>Applications can install add-ons so they can be invoked easily on a selection of files from Tracker. Only the add-ons that can handle a specific filetype are presented under <span class="menu">Add-Ons</span> from the context menu or the <span class="menu">File</span> menu of a Tracker window. Some add-ons don't necessarily need a file to work on and are thus always present.</p>
62 <p>New Tracker add-ons that don't come as part of a regular .hpkg package, can be installed by copying them into their respective non-packaged folder (see topic <a href="filesystem-layout.html">Filesystem layout</a>):</p>
63 <table summary="layout" border="0" cellspacing="0" cellpadding="2">
64 <tr><td><span class="path">/boot/system/non-packaged/add-ons/Tracker/</span></td><td>   </td><td> for add-ons available to every user.</td></tr>
65 <tr><td><span class="path">/boot/home/config/non-packaged/add-ons/Tracker/</span></td><td>   </td><td> for add-ons only available to yourself.</td></tr>
66 </table>
67 <p>The file name of an add-on can be suffixed with a dash and capital letter, and is then available via keyboard shortcut. For example, <span class="app">Open Target Folder-O</span> opens with <span class="key">ALT</span> <span class="key">OPT</span> <span class="key">O</span>.<br />
68 Of course, you have to take care of possible shortcut collisions when deciding on a shortcut. You can't have the same for different add-ons.</p>
70 <h2><a id="system-add-ons" name="system-add-ons">Haiku's Tracker Add-Ons</a></h2>
71 <p>These Tracker Add-Ons come with every Haiku installation:</p>
72 <table summary="layout" border="0" cellspacing="0" cellpadding="4">
73 <tr><td class="onelinetop"><b>Background</b><i>-B</i></td>
74 <td valign="top">Opens the <a href="preferences/backgrounds.html">Background</a> preferences to change the color or image of the Desktop or any folder. Invoked on an image file the Background panel is launched with that image already loaded as a potential background.</td></tr>
75 <tr><td class="onelinetop"><b>DiskUsage</b><i>-I</i></td>
76 <td valign="top">Starts the <a href="applications/diskusage.html">DiskUsage</a> application with the according folder as basis.</td></tr>
77 <tr><td class="onelinetop"><b>FileType</b><i>-F</i></td>
78 <td valign="top">Invoked on a file, opens its specific <a href="filetypes.html">FileType</a> panel, otherwise the general FileTypes preferences are launched.</td></tr>
79 <tr><td class="onelinetop"><b>Open Target Folder</b><i>-O</i></td>
80 <td valign="top">Can only be used on a linked file and opens the folder that file lives in.</td></tr>
81 <tr><td class="onelinetop"><b>TextSearch</b><i>-G</i></td>
82 <td valign="top">Starts the <a href="applications/textsearch.html">TextSearch</a> application to look for a string in the selected folder (and its subfolders).</td></tr>
83 <tr><td class="onelinetop"><b>ZipOMatic</b><i>-Z</i></td>
84 <td valign="top">A selection of files will be added to a zip archive, invoked without a selection opens a panel to create an archive via drag &amp; drop.</td></tr>
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