edf0e5b3f8
man pages up to mdoc guidelines and fix some minor formatting glitches. Also fixed a number of man pages to not abuse the .Xr macro to display functions and path names and a lot of other junk.
132 lines
4.4 KiB
Groff
132 lines
4.4 KiB
Groff
.\"
|
|
.\" Copyright (c) 1993 Paul Kranenburg
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" 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 by Paul Kranenburg.
|
|
.\" 3. 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.
|
|
.\"
|
|
.\" $Id: ldconfig.8,v 1.7 1995/06/24 10:08:43 asami Exp $
|
|
.\"
|
|
.Dd October 3, 1993
|
|
.Dt LDCONFIG 8
|
|
.Os FreeBSD
|
|
.Sh NAME
|
|
.Nm ldconfig
|
|
.Nd configure the shared library cache
|
|
.Sh SYNOPSIS
|
|
.Nm ldconfig
|
|
.Op Fl mrsv
|
|
.Op Ar directory Ar ...
|
|
.Sh DESCRIPTION
|
|
.Nm
|
|
is used to prepare a set of
|
|
.Dq hints
|
|
for use by the run-time linker
|
|
.Xr ld.so 1
|
|
to facilitate quick lookup of shared libraries available in multiple
|
|
directories. It scans a set of built-in system directories and any
|
|
.Ar directories
|
|
specified on the command line (in the given order) looking for shared
|
|
libraries and stores the results in the file
|
|
.Pa /var/run/ld.so.hints
|
|
to forestall the overhead that would otherwise result from the
|
|
directory search operations
|
|
.Xr ld.so 1
|
|
would have to perform to load the required shared libraries.
|
|
.Pp
|
|
The shared libraries so found will be automatically available for loading
|
|
if needed by the program being prepared for execution. This obviates the need
|
|
for storing search paths within the executable.
|
|
.Pp
|
|
The
|
|
.Ev LD_LIBRARY_PATH
|
|
environment variable can be used to override the use of
|
|
directories (or the order thereof) from the cache or to specify additional
|
|
directories where shared libraries might be found.
|
|
.Ev LD_LIBRARY_PATH
|
|
is a
|
|
.Sq \:
|
|
separated list of directory paths which are searched by
|
|
.Xr ld.so 1
|
|
when it needs to load a shared library. It can be viewed as the run-time
|
|
equivalent of the
|
|
.Fl L
|
|
switch of
|
|
.Xr ld 1 .
|
|
.Pp
|
|
.Nm Ldconfig
|
|
is typically run as part of the boot sequence.
|
|
.Pp
|
|
The following options recognized by
|
|
.Nm ldconfig:
|
|
.Bl -tag -width indent
|
|
.It Fl m
|
|
Instead of replacing the contents of
|
|
.Pa ld.so.hints
|
|
with those found in the directories specified,
|
|
.Dq merge
|
|
in new entries.
|
|
.It Fl r
|
|
Lists the current contents of
|
|
.Pa ld.so.hints
|
|
on the standard output. The hints file will not be modified.
|
|
.It Fl s
|
|
Do not scan the built-in system directory
|
|
.Pq Dq /usr/lib
|
|
for shared libraries.
|
|
.It Fl v
|
|
Switch on verbose mode.
|
|
.Sh Security
|
|
Special care must be taken when loading shared libraries into the address
|
|
space of
|
|
.Ev set-user-Id
|
|
programs. Whenever such a program is run,
|
|
.Nm ld.so
|
|
will only load shared libraries from the
|
|
.Pa ld.so.hints
|
|
file. In particular, the
|
|
.Ev LD_LIBRARY_PATH
|
|
is not used to search for libraries. Thus, the role of ldconfig is dual. In
|
|
addition to building a set of hints for quick lookup, it also serves to
|
|
specify the trusted collection of directories from which shared objects can
|
|
be safely loaded. It is presumed that the set of directories specified to
|
|
.Nm ldconfig
|
|
are under control of the system's administrator.
|
|
.Nm ld.so
|
|
further assists set-user-Id programs by erasing the
|
|
.Ev LD_LIBRARY_PATH
|
|
from the environment.
|
|
|
|
.Sh FILES
|
|
.Pa /var/run/ld.so.hints
|
|
.Sh SEE ALSO
|
|
.Xr ld 1 ,
|
|
.Xr link 5
|
|
.Sh HISTORY
|
|
A
|
|
.Nm
|
|
utility first appeared in SunOS 4.0, it appeared in its current form
|
|
in FreeBSD 1.1.
|