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-rw-r--r--doc/man3/OSSL_STORE_open.pod4
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/man3/OSSL_STORE_open.pod b/doc/man3/OSSL_STORE_open.pod
index 0bc6d5ccfd..3a05a88077 100644
--- a/doc/man3/OSSL_STORE_open.pod
+++ b/doc/man3/OSSL_STORE_open.pod
@@ -55,6 +55,10 @@ The given B<ui_method> and B<ui_data_data> will be reused by all
functions that use B<OSSL_STORE_CTX> when interaction is needed.
The given B<post_process> and B<post_process_data> will be reused by
OSSL_STORE_load() to manipulate or drop the value to be returned.
+The B<post_process> function drops values by returning B<NULL>, which
+will cause OSSL_STORE_load() to start its process over with loading
+the next object, until B<post_process> returns something other than
+B<NULL>, or the end of data is reached as indicated by OSSL_STORE_eof().
OSSL_STORE_ctrl() takes a B<OSSL_STORE_CTX>, and command number B<cmd> and
more arguments not specified here.