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-rw-r--r--doc/doc-docbook/spec.xfpt7
1 files changed, 6 insertions, 1 deletions
diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 9eb0b6b56..7a28d8107 100644
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -7378,10 +7378,15 @@ of the following form is provided:
.code
${quote_<lookup-type>:<string>}
.endd
-For example, the safest way to write the NIS+ query is
+For example, the way to write the NIS+ query is
.code
[name="${quote_nisplus:$local_part}"]
.endd
+.cindex "tainted data" "in lookups"
+.new
+&*All*& tainted data used in a quoery-style lookup must be quoted
+using a mechanism appropriate for the lookup type.
+.wen
See chapter &<<CHAPexpand>>& for full coverage of string expansions. The quote
operator can be used for all lookup types, but has no effect for single-key
lookups, since no quoting is ever needed in their key strings.