1.\" Copyright (c) 2003 Matthew N. Dodd <winter@jurai.net> 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.\" Note: The date here should be updated whenever a non-trivial 28.\" change is made to the manual page. 29.Dd April 7, 2003 30.Dt LIBMAP.CONF 5 31.Os 32.Sh NAME 33.Nm libmap.conf 34.Nd "configuration file for dynamic object dependency mapping" 35.Sh DESCRIPTION 36The 37.Em libmap 38functionality of 39.Nm ld-elf.so.1 40allows dynamic object dependencies to be mapped to arbitrary 41names. 42.Pp 43The configuration file consists of two whitespace separated columns; the 44left hand side containing the mapping candidate and the right hand 45side containing the mapping. Dependencies are matched against candidates 46and replaced with the mappings. 47.Pp 48Constrained mappings may be specified by enclosing the name of the 49executable or library in brackets. All mappings following a constraint 50will only be evaluated for that constraint. Currently, constraints 51are matched literally so that an executable with a fully qualified pathname 52will only match the same constraint. This means that 53.Em /usr/bin/foo 54will not match a constraint for 55.Em foo 56and vise-versa. 57.Pp 58WARNING! Constrained mappings must never appear first in the configuration 59file. While there is a way to specify the 60.Dq default 61constraint, its use is not recommended. 62.Pp 63The most common use at the date of writing is for allowing multiple 64POSIX threading libraries to be used on a system without relinking or 65changing symlinks. 66.Pp 67In order to enable this feature please see 68.Pa src/libexec/rtld-elf/Makefile . 69.Sh EXAMPLE 70.Bd -literal 71 72# /etc/libmap.conf 73# 74# candidate mapping 75# 76libc_r.so.5 libthr.so.1 # Everything uses 'libthr' 77libc_r.so libthr.so 78 79[/usr/local/bin/mplayer] # 'mplayer' uses libc_r. 80libc_r.so.5 libc_r.so.5 81libc_r.so libc_r.so 82 83[mplayer] 84libc_r.so.5 libc_r.so.5 85libc_r.so libc_r.so 86 87[/usr/local/sbin/httpd] # Apache uses libkse 88libc_r.so.5 libkse.so.1 89libc_r.so libkse.so 90 91[httpd] 92libc_r.so.5 libkse.so.1 93libc_r.so libkse.so 94.Ed 95.Sh FILES 96.Bl -tag -width ".Pa /etc/libmap.conf" -compact 97.It Pa /etc/libmap.conf 98The libmap configuration file. 99.El 100.Sh SEE ALSO 101.Xr rtld 1 102.Xr ldd 1 103.Sh HISTORY 104The 105.Nm 106manual page and libmap.conf functionality first appeared in 107.Fx 5.1 . 108.Sh AUTHORS 109This 110manual page was written by 111.An Matthew N. Dodd <winter@jurai.net> . 112