FTP: access files in root dir correctly

Accessing a file with an absolute path in the root dir but with no
directory specified was not handled correctly. This fix comes with four
new test cases that verify it.

Bug: http://curl.haxx.se/mail/lib-2013-04/0142.html
Reported by: Sam Deane

1 files changed, 15 insertions, 2 deletions

diff --git a/lib/ftp.c b/lib/ftp.c
index dce23de75..5308b2fa2 100644
--- a/lib/ftp.c
+++ b/lib/ftp.c
@@ -4316,13 +4316,17 @@ CURLcode ftp_parse_url_path(struct connectdata *conn)
     }
     slash_pos=strrchr(cur_pos, '/');
     if(slash_pos || !*cur_pos) {
+      size_t dirlen = slash_pos-cur_pos;
+
       ftpc->dirs = calloc(1, sizeof(ftpc->dirs[0]));
       if(!ftpc->dirs)
         return CURLE_OUT_OF_MEMORY;
 
+      if(!dirlen)
+        dirlen++;
+
       ftpc->dirs[0] = curl_easy_unescape(conn->data, slash_pos ? cur_pos : "/",
-                                         slash_pos ?
-                                         curlx_sztosi(slash_pos-cur_pos) : 1,
+                                         slash_pos ? curlx_sztosi(dirlen) : 1,
                                          NULL);
       if(!ftpc->dirs[0]) {
         freedirs(ftpc);
@@ -4377,6 +4381,15 @@ CURLcode ftp_parse_url_path(struct connectdata *conn)
         }
         else {
           cur_pos = slash_pos + 1; /* jump to the rest of the string */
+          if(!ftpc->dirdepth) {
+            /* path starts with a slash, add that as a directory */
+            ftpc->dirs[ftpc->dirdepth] = strdup("/");
+            if(!ftpc->dirs[ftpc->dirdepth++]) { /* run out of memory ... */
+              failf(data, "no memory");
+              freedirs(ftpc);
+              return CURLE_OUT_OF_MEMORY;
+            }
+          }
           continue;
         }