From 8fd7eee90e8bd592722433e45b93dbb699052fd8 Mon Sep 17 00:00:00 2001
From: Jim Fehlig <jfehlig@novell.com>
Date: Tue, 25 Aug 2009 15:54:18 -0600
Subject: [PATCH] Fix sexpr2string() to handle empty list.

S-expression containing empty lists, e.g. (cpus (() () () ())),
was not being handled properly in sexpr2string() serialization.
Emit an empty list when encountering NIL sexpr kind.
---
 src/sexpr.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/sexpr.c b/src/sexpr.c
index bc82d1fda8..81cb49f269 100644
--- a/src/sexpr.c
+++ b/src/sexpr.c
@@ -255,6 +255,10 @@ sexpr2string(const struct sexpr * sexpr, char *buffer, size_t n_buffer)
             ret += tmp;
             break;
         case SEXPR_NIL:
+            tmp = snprintf(buffer + ret, n_buffer - ret, "()");
+            if (tmp == 0)
+                goto error;
+            ret += tmp;
             break;
         default:
             goto error;