From: André Malo <nd@apache.org>
Date: Sun, 23 Feb 2003 22:04:23 +0000 (+0000)
Subject: guess, what happens, when l == 0
X-Git-Tag: pre_ajp_proxy~2088
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=73bb5423fc296c09ce3099dd63ec49d7492882fc;p=apache

guess, what happens, when l == 0
theoretical case, maybe ...


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@98773 13f79535-47bb-0310-9956-ffa450edef68
---

diff --git a/modules/mappers/mod_rewrite.c b/modules/mappers/mod_rewrite.c
index 78a271c68d..7bfec784bd 100644
--- a/modules/mappers/mod_rewrite.c
+++ b/modules/mappers/mod_rewrite.c
@@ -4013,7 +4013,7 @@ static char *subst_prefix_path(request_rec *r, char *input, char *match,
 
     /* first create a match string which always has a trailing slash */
     l = apr_cpystrn(matchbuf, match, sizeof(matchbuf) - 1) - matchbuf;
-    if (matchbuf[l-1] != '/') {
+    if (!l || matchbuf[l-1] != '/') {
        matchbuf[l] = '/';
        matchbuf[l+1] = '\0';
        l++;
@@ -4025,7 +4025,7 @@ static char *subst_prefix_path(request_rec *r, char *input, char *match,
 
         /* and now add the base-URL as replacement prefix */
         l = apr_cpystrn(substbuf, subst, sizeof(substbuf) - 1) - substbuf;
-        if (substbuf[l-1] != '/') {
+        if (!l || substbuf[l-1] != '/') {
            substbuf[l] = '/';
            substbuf[l+1] = '\0';
            l++;