From 1befebc950d7e4fb1ae6ae4e9b6b284ff4a04f89 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 15 Dec 2014 22:52:30 +0100
Subject: [PATCH] SFTP: work-around servers that return zero size on STAT

Bug: http://curl.haxx.se/mail/lib-2014-12/0103.html
Pathed-by: Marc Renault
---
 lib/ssh.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/ssh.c b/lib/ssh.c
index ba26eef72..d7e88c6f7 100644
--- a/lib/ssh.c
+++ b/lib/ssh.c
@@ -2107,10 +2107,14 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
       if(rc == LIBSSH2_ERROR_EAGAIN) {
         break;
       }
-      else if(rc) {
+      else if(rc ||
+              !(attrs.flags & LIBSSH2_SFTP_ATTR_SIZE) ||
+              (attrs.filesize == 0)) {
         /*
          * libssh2_sftp_open() didn't return an error, so maybe the server
          * just doesn't support stat()
+         * OR the server doesn't return a file size with a stat()
+         * OR file size is 0
          */
         data->req.size = -1;
         data->req.maxdownload = -1;