1.\" This source code is a product of Sun Microsystems, Inc. and is provided 2.\" for unrestricted use provided that this legend is included on all tape 3.\" media and as a part of the software program in whole or part. Users 4.\" may copy or modify this source code without charge, but are not authorized 5.\" to license or distribute it to anyone else except as part of a product or 6.\" program developed by the user. 7.\" 8.\" THIS PROGRAM CONTAINS SOURCE CODE COPYRIGHTED BY SUN MICROSYSTEMS, INC. 9.\" SUN MICROSYSTEMS, INC., MAKES NO REPRESENTATIONS ABOUT THE SUITABLITY 10.\" OF SUCH SOURCE CODE FOR ANY PURPOSE. IT IS PROVIDED "AS IS" WITHOUT 11.\" EXPRESS OR IMPLIED WARRANTY OF ANY KIND. SUN MICROSYSTEMS, INC. DISCLAIMS 12.\" ALL WARRANTIES WITH REGARD TO SUCH SOURCE CODE, INCLUDING ALL IMPLIED 13.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN 14.\" NO EVENT SHALL SUN MICROSYSTEMS, INC. BE LIABLE FOR ANY SPECIAL, INDIRECT, 15.\" INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING 16.\" FROM USE OF SUCH SOURCE CODE, REGARDLESS OF THE THEORY OF LIABILITY. 17.\" 18.\" This source code is provided with no support and without any obligation on 19.\" the part of Sun Microsystems, Inc. to assist in its use, correction, 20.\" modification or enhancement. 21.\" 22.\" SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 23.\" INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THIS 24.\" SOURCE CODE OR ANY PART THEREOF. 25.\" 26.\" Sun Microsystems, Inc. 27.\" 2550 Garcia Avenue 28.\" Mountain View, California 94043 29.\" 30.\" Copyright (c) 1991 Sun Microsystems, Inc. 31.\" 32.\" $FreeBSD: release/8.1.0/lib/libc/gen/dlopen.3 205979 2010-03-31 13:51:31Z gahr $ 33.\" 34.Dd April 28, 2011 35.Dt DLERROR 3 36.Os 37.Sh NAME 38.Nm dlerror 39.Nd retrieve dynamic linker error messages 40.Sh LIBRARY 41This function is not in a library. 42It is included in every dynamically linked program automatically. 43.Sh SYNOPSIS 44.In dlfcn.h 45.Ft char * 46.Fn dlerror "void" 47.Sh DESCRIPTION 48The 49.Fn dlerror 50function 51returns a null-terminated character string describing the last error that 52occurred during a call to 53.Fn dlopen , 54.Fn dladdr , 55.Fn dlinfo , 56.Fn dlsym , 57.Fn dlvsym , 58or 59.Fn dlclose . 60If no such error has occurred, 61.Fn dlerror 62returns a null pointer. 63At each call to 64.Fn dlerror , 65the error indication is reset. 66Thus in the case of two calls 67to 68.Fn dlerror , 69where the second call follows the first immediately, the second call 70will always return a null pointer. 71.Sh SEE ALSO 72.Xr rtld 1 , 73.Xr dlclose 3 , 74.Xr dlfcn 3 , 75.Xr dlopen 3 , 76.Xr dlsym 3 , 77.Xr dlvsym 3 78