pam_namespace: document instance_prefix field better wrt final element

1 files changed, 7 insertions, 6 deletions

diff --git a/modules/pam_namespace/namespace.conf.5.xml b/modules/pam_namespace/namespace.conf.5.xml
index d398639b..1141136d 100644
--- a/modules/pam_namespace/namespace.conf.5.xml
+++ b/modules/pam_namespace/namespace.conf.5.xml
@@ -74,12 +74,13 @@
     <para>
       The second field, <replaceable>instance_prefix</replaceable> is
       the string prefix used to build the pathname for the instantiation
-      of &lt;polydir&gt;. Depending on the polyinstantiation
-      <replaceable>method</replaceable> it is then appended with
-      "instance differentiation string" to generate the final
-      instance directory path. This directory is created if it did not exist
-      already, and is then bind mounted on the &lt;polydir&gt; to provide an
-      instance of &lt;polydir&gt; based on the &lt;method&gt; column.
+      of &lt;polydir&gt;. The path must end in a trailing slash, or
+      in a directory prefix used to build the full per-instance path.
+      Depending on the polyinstantiation <replaceable>method</replaceable> it
+      is then appended with "instance differentiation string" to generate the
+      final instance directory path. This directory is created if it did not
+      exist already, and is then bind mounted on the &lt;polydir&gt; to provide
+      an instance of &lt;polydir&gt; based on the &lt;method&gt; column.
       The special string <emphasis>$HOME</emphasis> is replaced with the
       user's home directory, and <emphasis>$USER</emphasis> with the username.
       This field cannot be blank.