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-rw-r--r--doc/man/pam_fail_delay.3.xml11
1 files changed, 9 insertions, 2 deletions
diff --git a/doc/man/pam_fail_delay.3.xml b/doc/man/pam_fail_delay.3.xml
index d886e9e0..53c1f89e 100644
--- a/doc/man/pam_fail_delay.3.xml
+++ b/doc/man/pam_fail_delay.3.xml
@@ -93,8 +93,15 @@ void (*delay_fn)(int retval, unsigned usec_delay, void *appdata_ptr);
<citerefentry>
<refentrytitle>pam_set_item</refentrytitle><manvolnum>3</manvolnum>
</citerefentry>.
- Note, if PAM_FAIL_DELAY item is unset (or set to NULL), then no delay
- will be performed.
+ </para>
+ <para>
+ Note that the PAM_FAIL_DELAY item is set to NULL by default. This
+ indicates that PAM should perform a random delay as described
+ above when authentication fails and a delay has been suggested.
+ If an application does not want the PAM library to perform any
+ delay on authentication failure, then the application must define
+ a custom delay function that executes no statements and set
+ the PAM_FAIL_DELAY item to point to this function.
</para>
</refsect1>