X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=authbind.git;a=blobdiff_plain;f=authbind.1;h=2b372eaf08396cf2c5bc5e6af200e35e88999404;hp=8d6c335be462c92ec7343408bdfbace7532904b9;hb=05e5771d65861c034d3f438ffbc3f657af4d57fe;hpb=a942b07a4483cfa4a5f0a8307e3b6239f7f44998

diff --git a/authbind.1 b/authbind.1
index 8d6c335..2b372ea 100644
--- a/authbind.1
+++ b/authbind.1
@@ -190,6 +190,13 @@ makes an
 installation specific to a particular C library.  This version is for
 GNU/Linux libc6 (glibc2).
 .PP
+.B authbind
+may not operate correctly with multithreaded programs.  It is
+inherently very difficult (if not impossible) to perform the kind of
+trickery that authbind does while preventing all undesirable
+interactions between authbind's activities and those of (say) a
+threading runtime system.
+.PP
 It is quite possible that
 .B authbind
 and other programs and facilities which use
@@ -205,7 +212,11 @@ means in this context).
 .B authbind
 is ineffective with setuid programs, because they do not honour
 .B LD_PRELOAD
-for security reasons.  Of course a setuid-root program does not need
+references outside the system directories, for security reasons.  (In
+fact, setuid programs should not honour
+.B LD_PRELOAD
+at all.)
+Of course a setuid-root program does not need
 .BR authbind ,
 but it might be useful to apply it to program which are setuid to
 another user or setgid.  If the author or builder of such a programs