From 60c6bcdeae6d132c0ab770cc8491055b24f7670e Mon Sep 17 00:00:00 2001
From: Peter Stephenson <pws@zsh.org>
Date: Thu, 7 May 2015 12:10:16 +0100
Subject: 35054: readonly -p + POSIXBUILTINS fix.

Now displays unset variables marekd readonly
---
 Src/params.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

(limited to 'Src/params.c')

diff --git a/Src/params.c b/Src/params.c
index d53b6ca7e..9eab51a34 100644
--- a/Src/params.c
+++ b/Src/params.c
@@ -5039,8 +5039,19 @@ printparamnode(HashNode hn, int printflags)
     Param p = (Param) hn;
     char *t, **u;
 
-    if (p->node.flags & PM_UNSET)
-	return;
+    if (p->node.flags & PM_UNSET) {
+	if (isset(POSIXBUILTINS) && (p->node.flags & PM_READONLY) &&
+	    (printflags & PRINT_TYPESET))
+	{
+	    /*
+	     * Special POSIX rules: show the parameter as readonly
+	     * even though it's unset, but with no value.
+	     */
+	    printflags |= PRINT_NAMEONLY;
+	}
+	else
+	    return;
+    }
 
     if (printflags & PRINT_TYPESET)
 	printf("typeset ");
-- 
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