From e5ae5b6890c2c6b2276f4a124d82648b76f9ec7a Mon Sep 17 00:00:00 2001
From: Maxim Dounin <mdounin@mdounin.ru>
Date: Mon, 2 Jul 2012 14:42:08 +0000
Subject: [PATCH] Merge of r4642:

Fixed core variables dynamic access after reconfiguration.

If variable was indexed in previous configuration but not in current
one, the NGX_HTTP_VAR_INDEXED flag was left set and confused
ngx_http_get_variable().

Patch by Yichun Zhang (agentzh), slightly modified.
---
 src/http/ngx_http_variables.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/http/ngx_http_variables.c b/src/http/ngx_http_variables.c
index 949cef910..d9633990c 100644
--- a/src/http/ngx_http_variables.c
+++ b/src/http/ngx_http_variables.c
@@ -2016,7 +2016,7 @@ ngx_int_t
 ngx_http_variables_add_core_vars(ngx_conf_t *cf)
 {
     ngx_int_t                   rc;
-    ngx_http_variable_t        *v;
+    ngx_http_variable_t        *cv, *v;
     ngx_http_core_main_conf_t  *cmcf;
 
     cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
@@ -2036,7 +2036,14 @@ ngx_http_variables_add_core_vars(ngx_conf_t *cf)
         return NGX_ERROR;
     }
 
-    for (v = ngx_http_core_variables; v->name.len; v++) {
+    for (cv = ngx_http_core_variables; cv->name.len; cv++) {
+        v = ngx_palloc(cf->pool, sizeof(ngx_http_variable_t));
+        if (v == NULL) {
+            return NGX_ERROR;
+        }
+
+        *v = *cv;
+
         rc = ngx_hash_add_key(cmcf->variables_keys, &v->name, v,
                               NGX_HASH_READONLY_KEY);