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<title>MIME typing: GnomeVFS - Filesystem Abstraction library</title>
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<a href="#gnome-vfs-2.0-gnome-vfs-mime.description" class="shortcut">Description</a></span>
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<div class="refentry">
<a name="gnome-vfs-2.0-gnome-vfs-mime"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gnome-vfs-2.0-gnome-vfs-mime.top_of_page"></a>MIME typing</span></h2>
<p>MIME typing — functions to get a mime-type for a file using its name or its content</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gnome-vfs-2.0-gnome-vfs-mime.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">const <span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="gnome-vfs-2.0-gnome-vfs-mime.html#gnome-vfs-mime-type-from-name" title="gnome_vfs_mime_type_from_name ()">gnome_vfs_mime_type_from_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="gnome-vfs-2.0-gnome-vfs-mime.html#gnome-vfs-mime-type-from-name-or-default" title="gnome_vfs_mime_type_from_name_or_default ()">gnome_vfs_mime_type_from_name_or_default</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="gnome-vfs-2.0-gnome-vfs-mime.html#gnome-vfs-get-mime-type-common" title="gnome_vfs_get_mime_type_common ()">gnome_vfs_get_mime_type_common</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="gnome-vfs-2.0-gnome-vfs-mime.html#gnome-vfs-get-mime-type-from-uri" title="gnome_vfs_get_mime_type_from_uri ()">gnome_vfs_get_mime_type_from_uri</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="gnome-vfs-2.0-gnome-vfs-mime.html#gnome-vfs-get-mime-type-from-file-data" title="gnome_vfs_get_mime_type_from_file_data ()">gnome_vfs_get_mime_type_from_file_data</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="gnome-vfs-2.0-gnome-vfs-mime.html#gnome-vfs-get-file-mime-type-fast" title="gnome_vfs_get_file_mime_type_fast ()">gnome_vfs_get_file_mime_type_fast</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="gnome-vfs-2.0-gnome-vfs-mime.html#gnome-vfs-get-file-mime-type" title="gnome_vfs_get_file_mime_type ()">gnome_vfs_get_file_mime_type</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="gnome-vfs-2.0-gnome-vfs-mime.html#gnome-vfs-mime-type-is-supertype" title="gnome_vfs_mime_type_is_supertype ()">gnome_vfs_mime_type_is_supertype</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="gnome-vfs-2.0-gnome-vfs-mime.html#gnome-vfs-get-supertype-from-mime-type" title="gnome_vfs_get_supertype_from_mime_type ()">gnome_vfs_get_supertype_from_mime_type</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gnome-vfs-2.0-gnome-vfs-mime.html#gnome-vfs-mime-info-cache-reload" title="gnome_vfs_mime_info_cache_reload ()">gnome_vfs_mime_info_cache_reload</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gnome-vfs-2.0-gnome-vfs-mime.html#gnome-vfs-mime-reload" title="gnome_vfs_mime_reload ()">gnome_vfs_mime_reload</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gnome-vfs-2.0-gnome-vfs-mime.html#gnome-vfs-mime-shutdown" title="gnome_vfs_mime_shutdown ()">gnome_vfs_mime_shutdown</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gnome-vfs-2.0-gnome-vfs-mime.description"></a><h2>Description</h2>
<p>
</p>
</div>
<div class="refsect1">
<a name="gnome-vfs-2.0-gnome-vfs-mime.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gnome-vfs-mime-type-from-name"></a><h3>gnome_vfs_mime_type_from_name ()</h3>
<pre class="programlisting">const <span class="returnvalue">char</span> *
gnome_vfs_mime_type_from_name (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>);</pre>
<div class="warning">
<p><code class="literal">gnome_vfs_mime_type_from_name</code> is deprecated and should not be used in newly-written code.</p>
<p>This function is deprecated, use
<a class="link" href="gnome-vfs-2.0-gnome-vfs-mime-utils.html#gnome-vfs-get-mime-type-for-name" title="gnome_vfs_get_mime_type_for_name ()"><code class="function">gnome_vfs_get_mime_type_for_name()</code></a> instead.</p>
</div>
<p>Determine the mime type for <em class="parameter"><code>filename</code></em>
.</p>
<div class="refsect3">
<a name="gnome-vfs-mime-type-from-name.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>filename</p></td>
<td class="parameter_description"><p>a filename (the file does not necessarily exist).</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gnome-vfs-mime-type-from-name.returns"></a><h4>Returns</h4>
<p> the mime-type for this filename. Will return
<a class="link" href="gnome-vfs-2.0-gnome-vfs-mime-utils.html#GNOME-VFS-MIME-TYPE-UNKNOWN:CAPS" title="GNOME_VFS_MIME_TYPE_UNKNOWN"><code class="literal">GNOME_VFS_MIME_TYPE_UNKNOWN</code></a> if mime-type could not be found.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-mime-type-from-name-or-default"></a><h3>gnome_vfs_mime_type_from_name_or_default ()</h3>
<pre class="programlisting">const <span class="returnvalue">char</span> *
gnome_vfs_mime_type_from_name_or_default
(<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *defaultv</code></em>);</pre>
<p>This routine tries to determine the mime-type of the filename
only by looking at the filename from the GNOME database of mime-types.</p>
<div class="refsect3">
<a name="gnome-vfs-mime-type-from-name-or-default.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>filename</p></td>
<td class="parameter_description"><p>a filename (the file does not necessarily exist).</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>defaultv</p></td>
<td class="parameter_description"><p>a default value to be returned if no match is found.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gnome-vfs-mime-type-from-name-or-default.returns"></a><h4>Returns</h4>
<p> the mime-type of the <em class="parameter"><code>filename</code></em>
. If no value could be
determined, it will return <em class="parameter"><code>defaultv</code></em>
.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-get-mime-type-common"></a><h3>gnome_vfs_get_mime_type_common ()</h3>
<pre class="programlisting">const <span class="returnvalue">char</span> *
gnome_vfs_get_mime_type_common (<em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-uri.html#GnomeVFSURI" title="GnomeVFSURI"><span class="type">GnomeVFSURI</span></a> *uri</code></em>);</pre>
<p>Tries to guess the mime type of the file represented by <em class="parameter"><code>uri</code></em>
.
Favors using the file data to the <em class="parameter"><code>uri</code></em>
extension.
Handles <em class="parameter"><code>uri</code></em>
of a non-existent file by falling back
on returning a type based on the extension. If cant find the mime-type based on the
extension also then returns 'application/octet-stream'.</p>
<p>FIXME: This function will not necessarily return the same mime type as doing a
get file info on the text uri.</p>
<div class="refsect3">
<a name="gnome-vfs-get-mime-type-common.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>uri</p></td>
<td class="parameter_description"><p>a real file or a non-existent uri.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gnome-vfs-get-mime-type-common.returns"></a><h4>Returns</h4>
<p> the mime-type for <em class="parameter"><code>uri</code></em>
.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-get-mime-type-from-uri"></a><h3>gnome_vfs_get_mime_type_from_uri ()</h3>
<pre class="programlisting">const <span class="returnvalue">char</span> *
gnome_vfs_get_mime_type_from_uri (<em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-uri.html#GnomeVFSURI" title="GnomeVFSURI"><span class="type">GnomeVFSURI</span></a> *uri</code></em>);</pre>
<p>Tries to guess the mime type of the file <em class="parameter"><code>uri</code></em>
by
checking the file name extension. Works on non-existent
files.</p>
<div class="refsect3">
<a name="gnome-vfs-get-mime-type-from-uri.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>uri</p></td>
<td class="parameter_description"><p>a file uri.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gnome-vfs-get-mime-type-from-uri.returns"></a><h4>Returns</h4>
<p> the mime-type for file at <em class="parameter"><code>uri</code></em>
.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-get-mime-type-from-file-data"></a><h3>gnome_vfs_get_mime_type_from_file_data ()</h3>
<pre class="programlisting">const <span class="returnvalue">char</span> *
gnome_vfs_get_mime_type_from_file_data
(<em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-uri.html#GnomeVFSURI" title="GnomeVFSURI"><span class="type">GnomeVFSURI</span></a> *uri</code></em>);</pre>
<div class="warning"><p><code class="literal">gnome_vfs_get_mime_type_from_file_data</code> is deprecated and should not be used in newly-written code.</p></div>
<p>Tries to guess the mime type of the file <em class="parameter"><code>uri</code></em>
by
checking the file data using the magic patterns. Does not handle text files properly.</p>
<div class="refsect3">
<a name="gnome-vfs-get-mime-type-from-file-data.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>uri</p></td>
<td class="parameter_description"><p>a file uri.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gnome-vfs-get-mime-type-from-file-data.returns"></a><h4>Returns</h4>
<p> the mime-type for this filename.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-get-file-mime-type-fast"></a><h3>gnome_vfs_get_file_mime_type_fast ()</h3>
<pre class="programlisting">const <span class="returnvalue">char</span> *
gnome_vfs_get_file_mime_type_fast (<em class="parameter"><code>const <span class="type">char</span> *path</code></em>,
<em class="parameter"><code>const <span class="type">struct stat</span> *optional_stat_info</code></em>);</pre>
<p>Tries to guess the mime type of the file represented by <em class="parameter"><code>path</code></em>
.
It uses extention/name detection first, and if that fails
it falls back to mime-magic based lookup. This is faster
than always doing mime-magic but doesn't always produce
the right answer, so for important decisions
you should use <a class="link" href="gnome-vfs-2.0-gnome-vfs-mime.html#gnome-vfs-get-file-mime-type" title="gnome_vfs_get_file_mime_type ()"><code class="function">gnome_vfs_get_file_mime_type()</code></a>.</p>
<div class="refsect3">
<a name="gnome-vfs-get-file-mime-type-fast.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>path</p></td>
<td class="parameter_description"><p>path of the file whose mime type is to be found out.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>optional_stat_info</p></td>
<td class="parameter_description"><p>optional stat buffer.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gnome-vfs-get-file-mime-type-fast.returns"></a><h4>Returns</h4>
<p> the mime-type for file at <em class="parameter"><code>path</code></em>
.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-get-file-mime-type"></a><h3>gnome_vfs_get_file_mime_type ()</h3>
<pre class="programlisting">const <span class="returnvalue">char</span> *
gnome_vfs_get_file_mime_type (<em class="parameter"><code>const <span class="type">char</span> *path</code></em>,
<em class="parameter"><code>const <span class="type">struct stat</span> *optional_stat_info</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> suffix_only</code></em>);</pre>
<p>Tries to guess the mime type of the file represented by <em class="parameter"><code>path</code></em>
.
If <em class="parameter"><code>suffix_only</code></em>
is false, uses the mime-magic based lookup first.
Handles <em class="parameter"><code>path</code></em>
of a non-existent file by falling back
on returning a type based on the extension.</p>
<p>If you need a faster, less accurate version, use
<a class="link" href="gnome-vfs-2.0-gnome-vfs-mime.html#gnome-vfs-get-file-mime-type-fast" title="gnome_vfs_get_file_mime_type_fast ()"><code class="function">gnome_vfs_get_file_mime_type_fast()</code></a>.</p>
<div class="refsect3">
<a name="gnome-vfs-get-file-mime-type.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>path</p></td>
<td class="parameter_description"><p>path of a file whose mime type is to be found out.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>optional_stat_info</p></td>
<td class="parameter_description"><p>optional stat buffer.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>suffix_only</p></td>
<td class="parameter_description"><p>whether or not to do a magic-based lookup.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gnome-vfs-get-file-mime-type.returns"></a><h4>Returns</h4>
<p> the mime-type for file at <em class="parameter"><code>path</code></em>
.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-mime-type-is-supertype"></a><h3>gnome_vfs_mime_type_is_supertype ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gnome_vfs_mime_type_is_supertype (<em class="parameter"><code>const <span class="type">char</span> *mime_type</code></em>);</pre>
<div class="refsect3">
<a name="gnome-vfs-mime-type-is-supertype.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>mime_type</p></td>
<td class="parameter_description"><p>a const char * identifying a mime type.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gnome-vfs-mime-type-is-supertype.returns"></a><h4>Returns</h4>
<p> Whether <em class="parameter"><code>mime_type</code></em>
is of the form "foo<code class="literal">/</code>*".</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-get-supertype-from-mime-type"></a><h3>gnome_vfs_get_supertype_from_mime_type ()</h3>
<pre class="programlisting"><span class="returnvalue">char</span> *
gnome_vfs_get_supertype_from_mime_type
(<em class="parameter"><code>const <span class="type">char</span> *mime_type</code></em>);</pre>
<div class="refsect3">
<a name="gnome-vfs-get-supertype-from-mime-type.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>mime_type</p></td>
<td class="parameter_description"><p>mime type to get the supertype for.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gnome-vfs-get-supertype-from-mime-type.returns"></a><h4>Returns</h4>
<p> The supertype for <em class="parameter"><code>mime_type</code></em>
, allocating new memory.</p>
<p>The supertype of an application is computed by removing its
suffix, and replacing it with "*". Thus, "foo/bar" will be
converted to "foo<code class="literal">/</code>*".</p>
<div class="note">
If this function is called on a supertype, it will return a copy of the supertype.
</div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-mime-info-cache-reload"></a><h3>gnome_vfs_mime_info_cache_reload ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gnome_vfs_mime_info_cache_reload (<em class="parameter"><code>const <span class="type">char</span> *dir</code></em>);</pre>
<p>Reload the mime information for the <em class="parameter"><code>dir</code></em>
.</p>
<div class="refsect3">
<a name="gnome-vfs-mime-info-cache-reload.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>dir</p></td>
<td class="parameter_description"><p>directory path which needs reloading.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-mime-reload"></a><h3>gnome_vfs_mime_reload ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gnome_vfs_mime_reload (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Reload the MIME database.</p>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-mime-shutdown"></a><h3>gnome_vfs_mime_shutdown ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gnome_vfs_mime_shutdown (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<div class="warning">
<p><code class="literal">gnome_vfs_mime_shutdown</code> is deprecated and should not be used in newly-written code.</p>
<p>This function doesn't have to be called as the
operating system automatically cleans up resources when exiting.</p>
<p>Unload the MIME database from memory.</p>
</div>
</div>
</div>
<div class="refsect1">
<a name="gnome-vfs-2.0-gnome-vfs-mime.other_details"></a><h2>Types and Values</h2>
</div>
</div>
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