1 files changed, 24 insertions, 1 deletions

diff --git a/docs/busybox_footer.pod b/docs/busybox_footer.pod
index ddeef532c..64785ecd1 100644
--- a/docs/busybox_footer.pod
+++ b/docs/busybox_footer.pod
@@ -1,5 +1,28 @@
 =back
 
+=head1 LIBC NSS
+
+GNU Libc (glibc) uses the Name Service Switch (NSS) to configure the behavior
+of the C library for the local environment, and to configure how it reads
+system data, such as passwords and group information.  This is implemented
+using an /etc/nsswitch.conf configuration file, and using one or more of the
+/lib/libnss_* libraries.  BusyBox tries to avoid using any libc calls that make
+use of NSS.  Some applets however, such as login and su, will use libc functions
+that require NSS.
+
+If you enable CONFIG_USE_BB_PWD_GRP, BusyBox will use internal functions to
+directly access the /etc/passwd, /etc/group, and /etc/shadow files without
+using NSS.  This may allow you to run your system without the need for
+installing any of the NSS configuration files and libraries.
+
+When used with glibc, the BusyBox 'networking' applets will similarly require
+that you install at least some of the glibc NSS stuff (in particular,
+/etc/nsswitch.conf, /lib/libnss_dns*, /lib/libnss_files*, and /lib/libresolv*).
+
+Shameless Plug: As an alternative, one could use a C library such as uClibc.  In
+addition to making your system significantly smaller, uClibc does not require the
+use of any NSS support files or libraries.
+
 =head1 MAINTAINER
 
 Erik Andersen <andersen@codepoet.org>
@@ -229,5 +252,5 @@ Tito Ragusa <farmatito@tiscali.it>
 
 =cut
 
-# $Id: busybox_footer.pod,v 1.15 2004/04/06 17:52:02 andersen Exp $
+# $Id: busybox_footer.pod,v 1.16 2004/04/13 16:31:41 andersen Exp $