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Add note about LD_PRELOAD

This commit is contained in:
msaitoh 1999-02-22 23:07:16 +00:00
parent c49b4850b3
commit 9a58d580cd
1 changed files with 7 additions and 2 deletions
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9
sbin/ldconfig/ldconfig.8
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@ -1,4 +1,4 @@
.\" $NetBSD: ldconfig.8,v 1.9 1998/09/05 13:08:40 pk Exp $
.\" $NetBSD: ldconfig.8,v 1.10 1999/02/22 23:07:16 msaitoh Exp $
.\"
.\" Copyright (c) 1998 The NetBSD Foundation, Inc.
.\" All rights reserved.
@ -115,7 +115,8 @@ for shared libraries. (Directories listed in
are still scanned.)
.It Fl v
Switch on verbose mode.
.Sh Security
.El
.Sh SECURITY
Special care must be taken when loading shared libraries into the address
space of
.Ev set-user-ID
@ -125,6 +126,8 @@ will only load shared libraries from the
.Pa ld.so.hints
file. In particular, the
.Ev LD_LIBRARY_PATH
and
.Ev LD_PRELOAD
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
@ -134,6 +137,8 @@ is under control of the system's administrator.
.Nm ld.so
further assists set-user-ID programs by erasing the
.Ev LD_LIBRARY_PATH
and
.Ev LD_PRELOAD
from the environment.
.Sh FILES