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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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   <div id="projectname">libevdev
   &#160;<span id="projectnumber">1.5.8</span>
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   <div id="projectbrief">A wrapper library for evdev devices</div>
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<div class="header">
  <div class="summary">
<a href="#func-members">Functions</a>  </div>
  <div class="headertitle">
<div class="title">Querying device capabilities</div>  </div>
</div><!--header-->
<div class="contents">

<p>Abstraction functions to handle device capabilities, specifically device properties such as the name of the device and the bits representing the events supported by this device.  
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:gaed0328c67b7a78422636d9fe09a73f12"><td class="memItemLeft" align="right" valign="top">const char *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#gaed0328c67b7a78422636d9fe09a73f12">libevdev_get_name</a> (const struct libevdev *dev)</td></tr>
<tr class="memdesc:gaed0328c67b7a78422636d9fe09a73f12"><td class="mdescLeft">&#160;</td><td class="mdescRight">Retrieve the device's name, either as set by the caller or as read from the kernel.  <a href="#gaed0328c67b7a78422636d9fe09a73f12">More...</a><br /></td></tr>
<tr class="separator:gaed0328c67b7a78422636d9fe09a73f12"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga5df483b0b24d7b96ea1181808fab851d"><td class="memItemLeft" align="right" valign="top">const char *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga5df483b0b24d7b96ea1181808fab851d">libevdev_get_phys</a> (const struct libevdev *dev)</td></tr>
<tr class="memdesc:ga5df483b0b24d7b96ea1181808fab851d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Retrieve the device's physical location, either as set by the caller or as read from the kernel.  <a href="#ga5df483b0b24d7b96ea1181808fab851d">More...</a><br /></td></tr>
<tr class="separator:ga5df483b0b24d7b96ea1181808fab851d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga6d9f7d44bff8828ead3d251177035ca4"><td class="memItemLeft" align="right" valign="top">const char *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga6d9f7d44bff8828ead3d251177035ca4">libevdev_get_uniq</a> (const struct libevdev *dev)</td></tr>
<tr class="memdesc:ga6d9f7d44bff8828ead3d251177035ca4"><td class="mdescLeft">&#160;</td><td class="mdescRight">Retrieve the device's unique identifier, either as set by the caller or as read from the kernel.  <a href="#ga6d9f7d44bff8828ead3d251177035ca4">More...</a><br /></td></tr>
<tr class="separator:ga6d9f7d44bff8828ead3d251177035ca4"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga1dc66cfef646878d58be72f8902a6bac"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga1dc66cfef646878d58be72f8902a6bac">libevdev_get_id_product</a> (const struct libevdev *dev)</td></tr>
<tr class="separator:ga1dc66cfef646878d58be72f8902a6bac"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga08891c3285da5b8d26769c9a34f063f3"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga08891c3285da5b8d26769c9a34f063f3">libevdev_get_id_vendor</a> (const struct libevdev *dev)</td></tr>
<tr class="separator:ga08891c3285da5b8d26769c9a34f063f3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga9bf55d416401642bad0c435735682308"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga9bf55d416401642bad0c435735682308">libevdev_get_id_bustype</a> (const struct libevdev *dev)</td></tr>
<tr class="separator:ga9bf55d416401642bad0c435735682308"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga75a07d0c96dfe09d2194c104c429d0ae"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga75a07d0c96dfe09d2194c104c429d0ae">libevdev_get_id_version</a> (const struct libevdev *dev)</td></tr>
<tr class="separator:ga75a07d0c96dfe09d2194c104c429d0ae"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga31e9e7a99215a03bcdc339b53e1be2fa"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga31e9e7a99215a03bcdc339b53e1be2fa">libevdev_get_driver_version</a> (const struct libevdev *dev)</td></tr>
<tr class="separator:ga31e9e7a99215a03bcdc339b53e1be2fa"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga36d529ea53f4522004bc7d16c051464b"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga36d529ea53f4522004bc7d16c051464b">libevdev_has_property</a> (const struct libevdev *dev, unsigned int prop)</td></tr>
<tr class="separator:ga36d529ea53f4522004bc7d16c051464b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga398bef155fa4a0cfb832de30723ebd14"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga398bef155fa4a0cfb832de30723ebd14">libevdev_has_event_type</a> (const struct libevdev *dev, unsigned int type)</td></tr>
<tr class="separator:ga398bef155fa4a0cfb832de30723ebd14"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gab2ab9dad417f33daa79fa0c3d682df0b"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#gab2ab9dad417f33daa79fa0c3d682df0b">libevdev_has_event_code</a> (const struct libevdev *dev, unsigned int type, unsigned int code)</td></tr>
<tr class="separator:gab2ab9dad417f33daa79fa0c3d682df0b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga482ce989a3f62f7e67e4ea7ad534189e"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga482ce989a3f62f7e67e4ea7ad534189e">libevdev_get_abs_minimum</a> (const struct libevdev *dev, unsigned int code)</td></tr>
<tr class="memdesc:ga482ce989a3f62f7e67e4ea7ad534189e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the minimum axis value for the given axis, as advertised by the kernel.  <a href="#ga482ce989a3f62f7e67e4ea7ad534189e">More...</a><br /></td></tr>
<tr class="separator:ga482ce989a3f62f7e67e4ea7ad534189e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga97a3411ae85f1f3b5c5eb1d5351b11ca"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga97a3411ae85f1f3b5c5eb1d5351b11ca">libevdev_get_abs_maximum</a> (const struct libevdev *dev, unsigned int code)</td></tr>
<tr class="memdesc:ga97a3411ae85f1f3b5c5eb1d5351b11ca"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the maximum axis value for the given axis, as advertised by the kernel.  <a href="#ga97a3411ae85f1f3b5c5eb1d5351b11ca">More...</a><br /></td></tr>
<tr class="separator:ga97a3411ae85f1f3b5c5eb1d5351b11ca"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga1a3dfeb3bb2db0b4323c836c7ab10f1a"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga1a3dfeb3bb2db0b4323c836c7ab10f1a">libevdev_get_abs_fuzz</a> (const struct libevdev *dev, unsigned int code)</td></tr>
<tr class="memdesc:ga1a3dfeb3bb2db0b4323c836c7ab10f1a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the axis fuzz for the given axis, as advertised by the kernel.  <a href="#ga1a3dfeb3bb2db0b4323c836c7ab10f1a">More...</a><br /></td></tr>
<tr class="separator:ga1a3dfeb3bb2db0b4323c836c7ab10f1a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga6b3f7ebae2324524dc41384acd724b92"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga6b3f7ebae2324524dc41384acd724b92">libevdev_get_abs_flat</a> (const struct libevdev *dev, unsigned int code)</td></tr>
<tr class="memdesc:ga6b3f7ebae2324524dc41384acd724b92"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the axis flat for the given axis, as advertised by the kernel.  <a href="#ga6b3f7ebae2324524dc41384acd724b92">More...</a><br /></td></tr>
<tr class="separator:ga6b3f7ebae2324524dc41384acd724b92"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga75751e637a845201b6d1c419ecfa6ba4"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga75751e637a845201b6d1c419ecfa6ba4">libevdev_get_abs_resolution</a> (const struct libevdev *dev, unsigned int code)</td></tr>
<tr class="memdesc:ga75751e637a845201b6d1c419ecfa6ba4"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the axis resolution for the given axis, as advertised by the kernel.  <a href="#ga75751e637a845201b6d1c419ecfa6ba4">More...</a><br /></td></tr>
<tr class="separator:ga75751e637a845201b6d1c419ecfa6ba4"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga6d8e2caf87fa536fad979346671838d7"><td class="memItemLeft" align="right" valign="top">const struct input_absinfo *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga6d8e2caf87fa536fad979346671838d7">libevdev_get_abs_info</a> (const struct libevdev *dev, unsigned int code)</td></tr>
<tr class="memdesc:ga6d8e2caf87fa536fad979346671838d7"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the axis info for the given axis, as advertised by the kernel.  <a href="#ga6d8e2caf87fa536fad979346671838d7">More...</a><br /></td></tr>
<tr class="separator:ga6d8e2caf87fa536fad979346671838d7"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga6259f4c6bdba950329ff9cd48c2ef8a3"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga6259f4c6bdba950329ff9cd48c2ef8a3">libevdev_get_event_value</a> (const struct libevdev *dev, unsigned int type, unsigned int code)</td></tr>
<tr class="memdesc:ga6259f4c6bdba950329ff9cd48c2ef8a3"><td class="mdescLeft">&#160;</td><td class="mdescRight">Behaviour of this function is undefined if the device does not provide the event.  <a href="#ga6259f4c6bdba950329ff9cd48c2ef8a3">More...</a><br /></td></tr>
<tr class="separator:ga6259f4c6bdba950329ff9cd48c2ef8a3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga0a7be80d769294bf9758adf79c3c7147"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#ga0a7be80d769294bf9758adf79c3c7147">libevdev_fetch_event_value</a> (const struct libevdev *dev, unsigned int type, unsigned int code, int *value)</td></tr>
<tr class="memdesc:ga0a7be80d769294bf9758adf79c3c7147"><td class="mdescLeft">&#160;</td><td class="mdescRight">Fetch the current value of the event type.  <a href="#ga0a7be80d769294bf9758adf79c3c7147">More...</a><br /></td></tr>
<tr class="separator:ga0a7be80d769294bf9758adf79c3c7147"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gaf12fa199bb9497b38358d72e7505d770"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__bits.html#gaf12fa199bb9497b38358d72e7505d770">libevdev_get_repeat</a> (const struct libevdev *dev, int *delay, int *period)</td></tr>
<tr class="memdesc:gaf12fa199bb9497b38358d72e7505d770"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the repeat delay and repeat period values for this device.  <a href="#gaf12fa199bb9497b38358d72e7505d770">More...</a><br /></td></tr>
<tr class="separator:gaf12fa199bb9497b38358d72e7505d770"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>Abstraction functions to handle device capabilities, specifically device properties such as the name of the device and the bits representing the events supported by this device. </p>
<p>The logical state returned may lag behind the physical state of the device. libevdev queries the device state on <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a> and then relies on the caller to parse events through <a class="el" href="group__events.html#gabb96c864e836c0b98788f4ab771c3a76" title="Get the next event from the device. ">libevdev_next_event()</a>. If a caller does not use <a class="el" href="group__events.html#gabb96c864e836c0b98788f4ab771c3a76" title="Get the next event from the device. ">libevdev_next_event()</a>, libevdev will not update the internal state of the device and thus returns outdated values. </p>
<h2 class="groupheader">Function Documentation</h2>
<a id="ga0a7be80d769294bf9758adf79c3c7147"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga0a7be80d769294bf9758adf79c3c7147">&#9670;&nbsp;</a></span>libevdev_fetch_event_value()</h2>

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          <td class="memname">int libevdev_fetch_event_value </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&#160;</td>
          <td class="paramname"><em>type</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&#160;</td>
          <td class="paramname"><em>code</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int *&#160;</td>
          <td class="paramname"><em>value</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Fetch the current value of the event type. </p>
<p>This is a shortcut for</p>
<div class="fragment"><div class="line"><span class="keywordflow">if</span> (<a class="code" href="group__bits.html#ga398bef155fa4a0cfb832de30723ebd14">libevdev_has_event_type</a>(dev, t) &amp;&amp; <a class="code" href="group__bits.html#gab2ab9dad417f33daa79fa0c3d682df0b">libevdev_has_event_code</a>(dev, t, c))</div><div class="line">     val = <a class="code" href="group__bits.html#ga6259f4c6bdba950329ff9cd48c2ef8a3">libevdev_get_event_value</a>(dev, t, c);</div></div><!-- fragment --><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir"></td><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a> </td></tr>
    <tr><td class="paramdir"></td><td class="paramname">type</td><td>The event type for the code to query (EV_SYN, EV_REL, etc.) </td></tr>
    <tr><td class="paramdir"></td><td class="paramname">code</td><td>The event code to query for, one of ABS_X, REL_X, etc. </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">value</td><td>The current value of this axis returned.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>If the device supports this event type and code, the return value is non-zero and value is set to the current value of this axis. Otherwise, 0 is returned and value is unmodified.</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd>
<dd>
The value for ABS_MT_ events is undefined, use <a class="el" href="group__mt.html#gaca19dca5aa8f0ea3b210f3fc670384ec" title="Fetch the current value of the code for the given slot. ">libevdev_fetch_slot_value()</a> instead</dd></dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="group__mt.html#gaca19dca5aa8f0ea3b210f3fc670384ec" title="Fetch the current value of the code for the given slot. ">libevdev_fetch_slot_value</a> </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga6b3f7ebae2324524dc41384acd724b92">&#9670;&nbsp;</a></span>libevdev_get_abs_flat()</h2>

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          <td class="memname">int libevdev_get_abs_flat </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&#160;</td>
          <td class="paramname"><em>code</em>&#160;</td>
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          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Get the axis flat for the given axis, as advertised by the kernel. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a> </td></tr>
    <tr><td class="paramname">code</td><td>The EV_ABS event code to query for, one of ABS_X, ABS_Y, etc.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>axis flat for the given axis or 0 if the axis is invalid</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga1a3dfeb3bb2db0b4323c836c7ab10f1a">&#9670;&nbsp;</a></span>libevdev_get_abs_fuzz()</h2>

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          <td class="memname">int libevdev_get_abs_fuzz </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&#160;</td>
          <td class="paramname"><em>code</em>&#160;</td>
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          <td></td>
          <td>)</td>
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        </tr>
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<p>Get the axis fuzz for the given axis, as advertised by the kernel. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a> </td></tr>
    <tr><td class="paramname">code</td><td>The EV_ABS event code to query for, one of ABS_X, ABS_Y, etc.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>axis fuzz for the given axis or 0 if the axis is invalid</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd></dl>

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<a id="ga6d8e2caf87fa536fad979346671838d7"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga6d8e2caf87fa536fad979346671838d7">&#9670;&nbsp;</a></span>libevdev_get_abs_info()</h2>

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          <td class="memname">const struct input_absinfo* libevdev_get_abs_info </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em>, </td>
        </tr>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&#160;</td>
          <td class="paramname"><em>code</em>&#160;</td>
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<p>Get the axis info for the given axis, as advertised by the kernel. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a> </td></tr>
    <tr><td class="paramname">code</td><td>The EV_ABS event code to query for, one of ABS_X, ABS_Y, etc.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The input_absinfo for the given code, or NULL if the device does not support this event code.</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga97a3411ae85f1f3b5c5eb1d5351b11ca">&#9670;&nbsp;</a></span>libevdev_get_abs_maximum()</h2>

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          <td class="memname">int libevdev_get_abs_maximum </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&#160;</td>
          <td class="paramname"><em>code</em>&#160;</td>
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<p>Get the maximum axis value for the given axis, as advertised by the kernel. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a> </td></tr>
    <tr><td class="paramname">code</td><td>The EV_ABS event code to query for, one of ABS_X, ABS_Y, etc.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>axis maximum for the given axis or 0 if the axis is invalid</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd></dl>

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<a id="ga482ce989a3f62f7e67e4ea7ad534189e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga482ce989a3f62f7e67e4ea7ad534189e">&#9670;&nbsp;</a></span>libevdev_get_abs_minimum()</h2>

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          <td class="memname">int libevdev_get_abs_minimum </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&#160;</td>
          <td class="paramname"><em>code</em>&#160;</td>
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          <td></td>
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<p>Get the minimum axis value for the given axis, as advertised by the kernel. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a> </td></tr>
    <tr><td class="paramname">code</td><td>The EV_ABS event code to query for, one of ABS_X, ABS_Y, etc.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>axis minimum for the given axis or 0 if the axis is invalid</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga75751e637a845201b6d1c419ecfa6ba4">&#9670;&nbsp;</a></span>libevdev_get_abs_resolution()</h2>

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          <td class="memname">int libevdev_get_abs_resolution </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em>, </td>
        </tr>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&#160;</td>
          <td class="paramname"><em>code</em>&#160;</td>
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          <td></td>
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<p>Get the axis resolution for the given axis, as advertised by the kernel. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a> </td></tr>
    <tr><td class="paramname">code</td><td>The EV_ABS event code to query for, one of ABS_X, ABS_Y, etc.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>axis resolution for the given axis or 0 if the axis is invalid</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga31e9e7a99215a03bcdc339b53e1be2fa">&#9670;&nbsp;</a></span>libevdev_get_driver_version()</h2>

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          <td class="memname">int libevdev_get_driver_version </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
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<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a></td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The driver version for this device</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga6259f4c6bdba950329ff9cd48c2ef8a3">&#9670;&nbsp;</a></span>libevdev_get_event_value()</h2>

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          <td class="memname">int libevdev_get_event_value </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&#160;</td>
          <td class="paramname"><em>type</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&#160;</td>
          <td class="paramname"><em>code</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
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<p>Behaviour of this function is undefined if the device does not provide the event. </p>
<p>If the device supports ABS_MT_SLOT, the value returned for any ABS_MT_* event code is the value of the currently active slot. You should use <a class="el" href="group__mt.html#ga8c6303391cb4f90b2d46763cf4eb8bc8" title="Return the current value of the code for the given slot. ">libevdev_get_slot_value()</a> instead.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a> </td></tr>
    <tr><td class="paramname">type</td><td>The event type for the code to query (EV_SYN, EV_REL, etc.) </td></tr>
    <tr><td class="paramname">code</td><td>The event code to query for, one of ABS_X, REL_X, etc.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The current value of the event.</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd>
<dd>
The value for ABS_MT_ events is undefined, use <a class="el" href="group__mt.html#ga8c6303391cb4f90b2d46763cf4eb8bc8" title="Return the current value of the code for the given slot. ">libevdev_get_slot_value()</a> instead</dd></dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="group__mt.html#ga8c6303391cb4f90b2d46763cf4eb8bc8" title="Return the current value of the code for the given slot. ">libevdev_get_slot_value</a> </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga9bf55d416401642bad0c435735682308">&#9670;&nbsp;</a></span>libevdev_get_id_bustype()</h2>

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          <td class="memname">int libevdev_get_id_bustype </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em></td><td>)</td>
          <td></td>
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<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a></td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The device's bus type</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga1dc66cfef646878d58be72f8902a6bac">&#9670;&nbsp;</a></span>libevdev_get_id_product()</h2>

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          <td class="memname">int libevdev_get_id_product </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a></td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The device's product ID</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga08891c3285da5b8d26769c9a34f063f3">&#9670;&nbsp;</a></span>libevdev_get_id_vendor()</h2>

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          <td class="memname">int libevdev_get_id_vendor </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
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<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a></td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The device's vendor ID</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga75a07d0c96dfe09d2194c104c429d0ae">&#9670;&nbsp;</a></span>libevdev_get_id_version()</h2>

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          <td class="memname">int libevdev_get_id_version </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em></td><td>)</td>
          <td></td>
        </tr>
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<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a></td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The device's firmware version</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#gaed0328c67b7a78422636d9fe09a73f12">&#9670;&nbsp;</a></span>libevdev_get_name()</h2>

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          <td class="memname">const char* libevdev_get_name </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em></td><td>)</td>
          <td></td>
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      </table>
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<p>Retrieve the device's name, either as set by the caller or as read from the kernel. </p>
<p>The string returned is valid until <a class="el" href="group__init.html#gacd9fe760d15be25fc99ce469034bd78c" title="Clean up and free the libevdev struct. ">libevdev_free()</a> or until <a class="el" href="group__kernel.html#gae5dcdb7678cdc9be4ab1989725b4ed32" title="Change the device&#39;s name as returned by libevdev_get_name(). ">libevdev_set_name()</a>, whichever comes earlier.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a></td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The device name as read off the kernel device. The name is never NULL but it may be the empty string.</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga5df483b0b24d7b96ea1181808fab851d">&#9670;&nbsp;</a></span>libevdev_get_phys()</h2>

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          <td class="memname">const char* libevdev_get_phys </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
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<p>Retrieve the device's physical location, either as set by the caller or as read from the kernel. </p>
<p>The string returned is valid until <a class="el" href="group__init.html#gacd9fe760d15be25fc99ce469034bd78c" title="Clean up and free the libevdev struct. ">libevdev_free()</a> or until <a class="el" href="group__kernel.html#gacd57c8d6ace8e0b1417809a9c1c67af3" title="Change the device&#39;s physical location as returned by libevdev_get_phys(). ">libevdev_set_phys()</a>, whichever comes earlier.</p>
<p>Virtual devices such as uinput devices have no phys location.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a></td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The physical location of this device, or NULL if there is none</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal safe. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#gaf12fa199bb9497b38358d72e7505d770">&#9670;&nbsp;</a></span>libevdev_get_repeat()</h2>

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          <td class="memname">int libevdev_get_repeat </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int *&#160;</td>
          <td class="paramname"><em>delay</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int *&#160;</td>
          <td class="paramname"><em>period</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Get the repeat delay and repeat period values for this device. </p>
<p>This function is a convenience function only, EV_REP is supported by <a class="el" href="group__bits.html#ga6259f4c6bdba950329ff9cd48c2ef8a3" title="Behaviour of this function is undefined if the device does not provide the event. ...">libevdev_get_event_value()</a>.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a> </td></tr>
    <tr><td class="paramname">delay</td><td>If not null, set to the repeat delay value </td></tr>
    <tr><td class="paramname">period</td><td>If not null, set to the repeat period value</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 on success, -1 if this device does not have repeat settings.</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe</dd></dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="group__bits.html#ga6259f4c6bdba950329ff9cd48c2ef8a3" title="Behaviour of this function is undefined if the device does not provide the event. ...">libevdev_get_event_value</a> </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga6d9f7d44bff8828ead3d251177035ca4">&#9670;&nbsp;</a></span>libevdev_get_uniq()</h2>

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          <td class="memname">const char* libevdev_get_uniq </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Retrieve the device's unique identifier, either as set by the caller or as read from the kernel. </p>
<p>The string returned is valid until <a class="el" href="group__init.html#gacd9fe760d15be25fc99ce469034bd78c" title="Clean up and free the libevdev struct. ">libevdev_free()</a> or until <a class="el" href="group__kernel.html#ga4e4fd2627744fd5811c50c7403f27ad7" title="Change the device&#39;s unique identifier as returned by libevdev_get_uniq(). ">libevdev_set_uniq()</a>, whichever comes earlier.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a></td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The unique identifier for this device, or NULL if there is none</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal safe. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#gab2ab9dad417f33daa79fa0c3d682df0b">&#9670;&nbsp;</a></span>libevdev_has_event_code()</h2>

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          <td class="memname">int libevdev_has_event_code </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&#160;</td>
          <td class="paramname"><em>type</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&#160;</td>
          <td class="paramname"><em>code</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
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<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a> </td></tr>
    <tr><td class="paramname">type</td><td>The event type for the code to query (EV_SYN, EV_REL, etc.) </td></tr>
    <tr><td class="paramname">code</td><td>The event code to query for, one of ABS_X, REL_X, etc.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>1 if the device supports this event type and code, or 0 otherwise.</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga398bef155fa4a0cfb832de30723ebd14">&#9670;&nbsp;</a></span>libevdev_has_event_type()</h2>

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          <td class="memname">int libevdev_has_event_type </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&#160;</td>
          <td class="paramname"><em>type</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
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<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a> </td></tr>
    <tr><td class="paramname">type</td><td>The event type to query for, one of EV_SYN, EV_REL, etc.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>1 if the device supports this event type, or 0 otherwise.</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga36d529ea53f4522004bc7d16c051464b">&#9670;&nbsp;</a></span>libevdev_has_property()</h2>

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          <td class="memname">int libevdev_has_property </td>
          <td>(</td>
          <td class="paramtype">const struct libevdev *&#160;</td>
          <td class="paramname"><em>dev</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&#160;</td>
          <td class="paramname"><em>prop</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
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<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">dev</td><td>The evdev device, already initialized with <a class="el" href="group__init.html#ga6658ac490d68c307ff8b8d1536c12b44" title="Set the fd for this struct and initialize internal data. ">libevdev_set_fd()</a> </td></tr>
    <tr><td class="paramname">prop</td><td>The input property to query for, one of INPUT_PROP_...</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>1 if the device provides this input property, or 0 otherwise.</dd></dl>
<dl class="section note"><dt>Note</dt><dd>This function is signal-safe </dd></dl>

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