#3 Little patch to support big files

[jorgeci]

I found an error when I try to mount a 6g dvd, the problem is that the function httpfs_stat cast the resut to int for off_t,

here is my patch

--- httpfs2.c.org 2016-02-25 15:22:02.355469804 -0600
+++ httpfs2.c 2016-02-25 15:22:14.935469406 -0600
@@ -186,7 +186,7 @@
* The FUSE operations originally ripped from the hello_ll sample.
*/

-static int httpfs_stat(fuse_ino_t ino, struct stat stbuf)
+static off_t httpfs_stat(fuse_ino_t ino, struct stat stbuf)
{
stbuf->st_ino = ino;
switch (ino) {
@@ -199,7 +199,7 @@
struct_url * url = thread_setup();
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
- return (int) get_stat(url, stbuf);
+ return get_stat(url, stbuf);
}; break;

     default:

[kenji uno]

This patch is very helpful!
I would suggest to merge this patch.

For example, I have 300GB disk image file.

It's size is 316878911488 in byte number.

In hex it is 0x49C7747800L.

Casting this to integer may cause overflow or underflow.

And the casted result becomes 0xC7747800 (if int is 32-bit width).

This is a negative number: -948668416.

httpfs_stat will return negative number, and then httpfs_lookup or httpfs_getattr will fail as it gets < 0 value.

        if(httpfs_stat(e.ino, &e.attr) < 0){
            assert(errno);
            fuse_reply_err(req, errno);
            return;
        }