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.\" $FreeBSD: release/8.1.0/lib/libc/gen/dlopen.3 205979 2010-03-31 13:51:31Z gahr $
.\"
.Dd April 28, 2011
.Dt DLERROR 3
.Os
.Sh NAME
.Nm dlerror
.Nd retrieve dynamic linker error messages
.Sh LIBRARY
This function is not in a library.
It is included in every dynamically linked program automatically.
.Sh SYNOPSIS
.In dlfcn.h
.Ft char *
.Fn dlerror "void"
.Sh DESCRIPTION
The
.Fn dlerror
function
returns a null-terminated character string describing the last error that
occurred during a call to
.Fn dlopen ,
.Fn dladdr ,
.Fn dlinfo ,
.Fn dlsym ,
.Fn dlvsym ,
or
.Fn dlclose .
If no such error has occurred,
.Fn dlerror
returns a null pointer.
At each call to
.Fn dlerror ,
the error indication is reset.
Thus in the case of two calls
to
.Fn dlerror ,
where the second call follows the first immediately, the second call
will always return a null pointer.
.Sh SEE ALSO
.Xr rtld 1 ,
.Xr dlclose 3 ,
.Xr dlfcn 3 ,
.Xr dlopen 3 ,
.Xr dlsym 3 ,
.Xr dlvsym 3