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<!DOCTYPE html>
<html lang="en">
<head>
<!--__GOLF_REDIRECT__-->
<title>Error code</title>
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<script>
function gg_copy(gt, eid, gc) {
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<!--GOLFMENU13-->
<!--GOLFENDMENU13-->
<!--BEGVDOC90-->
<div class='vhub' style='margin-top:10px;margin-right:20px;text-align:right;background-color:white;'><a href='https://golf-lang.com' style='border-bottom:0px'><img src='https://golf-lang.com/golf.png'/></a></div><div class='vhub' style='margin-top:10px;'> Error code</div><hr/>Many Golf statements return status with GG_ERR_... error codes, which are generally descriptive to a point. Such status may not as detailed as the operating system "errno" variable, however you can use "errno" clause in <a href='https://golf-lang.com/get-req.html'>get-req</a> statement to obtain the last known errno value from aforementioned statements. You should obtain this value as soon as possible after the statement because another statement may set it afterwards.<br/>
<br/>
In the following example, a directory is attempted to be deleted via <a href='https://golf-lang.com/delete-file.html'>delete-file</a>, which will fail with GG_ERR_DELETE - however you can get a more specific code via "errno" (which in this case is "21", or "EISDIR", which means that it cannot delete a directory with this statement):<br/>
<div class='code' style='position:relative;padding-right:16px;'>
<pre id='code_427'>
<span class="Statement"> delete-file</span> <span class="Constant">"some_directory"</span><span class="Type"> status</span> stc
<span class="Statement"> if-true</span> stc<span class="Identifier"> equal</span> GG_ERR_DELETE
<span class="Statement"> get-req</span><span class="Identifier"> errno</span><span class="Type"> to</span> e
<span class="Statement"> @</span>Cannot delete file
<span class="Statement"> pf-out</span> <span class="Constant">"Error </span><span class="Special">%ld</span><span class="Special">\n</span><span class="Constant">"</span>, e
<span class="Statement"> end-if</span></pre>
<span id=golf_copied_427 style='position:absolute;right:-14px;top:-30px; cursor: pointer;visibility:hidden;background:white;'>Copied!</span>
<textarea id='golft_427' style='position: absolute;left: -500%;'></textarea>
<img src='https://golf-lang.com/golf-copy-small-1.png' id='golfb' onclick='gg_copy(golft_427, code_427, golf_copied_427)' style='position:absolute;right:0;top:0; cursor: pointer;opacity:0.5;'/>
</div><br/>
Note that with some GG_ERR_... codes, the "errno" clause in get-req may return 0. This means the error was detected by Golf and not reported by the operating system.<br/>
<!--BEFSAL13--><div class="vsub"><a id="See also"></a>See also</div>
<a name='Error handling'></a><span style="font-weight:bold;">Error handling</span><br/>
<a href='https://golf-lang.com/db-error.html'>db-error</a> <br/>
<a href='https://golf-lang.com/error-code.html'>error-code</a> <br/>
<a href='https://golf-lang.com/error-handling.html'>error-handling</a> <br/>
<a href='https://golf-lang.com/report-error.html'>report-error</a> <br/>
<span style="font-weight:bold;">See all</span> <br/>
<a href='https://golf-lang.com/documentation.html'>documentation</a><br/>
<!--ENDVDOC90-->
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