From e0f60300ff7bc4d06f863ba084e6be80bb8faae8 Mon Sep 17 00:00:00 2001
From: nyamatongwe <unknown>
Date: Sat, 3 Feb 2001 01:17:13 +0000
Subject: Fixed infinite recursion when a value contains a reference to itself.

---
 src/PropSet.cxx | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'src')

diff --git a/src/PropSet.cxx b/src/PropSet.cxx
index 2799e3c3e..61aa7e169 100644
--- a/src/PropSet.cxx
+++ b/src/PropSet.cxx
@@ -96,6 +96,16 @@ SString PropSet::Get(const char *key) {
 
 SString PropSet::GetExpanded(const char *key) {
 	SString val = Get(key);
+    const char *var = strstr(val.c_str(), "$(");
+    while (var) {
+        if (isprefix(var+2, key) && (var[2 + strlen(key)] == ')')) {
+            // Found $(key) which would lead to an infinite loop so exit
+            return val;
+        }
+        var = strstr(var + 2, ")");
+        if (var)
+            var = strstr(var + 1, "$(");
+    }
 	return Expand(val.c_str());
 }
 
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