.\"	$OpenBSD: ldd.1,v 1.3 2002/05/24 04:17:00 deraadt Exp $
.\"
.\" Copyright (c) 1996 Per Fogelstrom
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed under OpenBSD by
.\"	Per Fogelstrom.
.\" 4. The name of the author may not be used to endorse or promote products
.\"    derived from this software without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
.\" OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\"
.Dd October 4, 1996
.Dt LDD 1
.Os
.Sh NAME
.Nm ldd
.Nd list dynamic object dependencies
.Sh SYNOPSIS
.Nm ldd
.Op Fl x
.Ar program
.Sh DESCRIPTION
.Nm
displays the shared objects needed to run
.Ar program.
.Nm
uses the
.Dv DT_NEEDED
tags to determine what dynamic objects are required.
To list the objects
.Nm
sets the environment variable
.Ev LD_TRACE_LOADED_OBJECTS
and then execs
.Ar program .
.Pp
If
.Nm
is invoked with the
.Fl x
flag, the tags from
.Ar program
are listed without using current ldconfig configuration.
.Sh SEE ALSO
.Xr ldconfig 8 ,
.Xr ld.so 8
.Sh DIAGNOSTICS
Exit status 0 if no error.
Exit status 1 if arg error.
Exit status 2 if
.Ar program
can't be read.
If
.Nm
fails to open the program file a message is printed.