X-Git-Url: https://git.distorted.org.uk/~mdw/distorted-keys/blobdiff_plain/a218eb121bc640b2821aa21f208f082881b7fc29..aa8478931ce8fa13b56f260da29241f38c18ab76:/keyfunc.sh.in

diff --git a/keyfunc.sh.in b/keyfunc.sh.in
index dca8dee..c68fec1 100644
--- a/keyfunc.sh.in
+++ b/keyfunc.sh.in
@@ -187,6 +187,19 @@ checkident () { check "$1" "$R_IDENT" "$2"; }
 checkword () { check "$1" "$R_WORD" "$2"; }
 checklabel () { check "$1 label" "$R_LABEL" "$2"; }
 
+## Boolean canonification.
+boolify () {
+  var=$1 what=$2
+
+  eval v=\$$var
+  case $v in
+    1 | y | yes | on | t | true) v=t ;;
+    0 | n | no | off | f | false | nil) v=nil ;;
+    *) echo >&2 "$quis: bad boolean $what \`$v'"; exit 1 ;;
+  esac
+  eval $var=\$v
+}
+
 ###--------------------------------------------------------------------------
 ### Key storage and properties.