errno variable

<p>□ Global variable that stores the cause of a error when a function is executed<br /><br> <br /><br> □ Return value can only check whether an error occurred<br /><br> <br /><br> □ If there is no error, 0 is stored. If there is a error, error code is stored<br /><br> <br /><br> □ Error code is stored in the path /usr/include/asm/errno.h<br /><br> <br /><br> □ #include&lt;errno.h&gt; is needed to use errno variable<br /></p> <div> <br /></div> <p>It is also posted at : <a href="http://cysecguide.blogspot.com/2016/09/errno-variable.html">http://cysecguide.blogspot.com/2016/09/errno-variable.html</a></p>