static int
mount_local_read (const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi)
{
char *r;
size_t rsize;
const size_t limit = 2 * 1024 * 1024;
DECL_G ();
DEBUG_CALL ("%s, %p, %zu, %ld", path, buf, size, (long) offset);
/* The guestfs protocol limits size to somewhere over 2MB. We just
* reduce the requested size here accordingly and push the problem
* up to every user. http://www.jwz.org/doc/worse-is-better.html
*/
if (size > limit)
size = limit;
r = guestfs_pread (g, path, size, offset, &rsize);
if (r == NULL)
RETURN_ERRNO;
/* This should never happen, but at least it stops us overflowing
* the output buffer if it does happen.
*/
if (rsize > size)
rsize = size;
memcpy (buf, r, rsize);
free (r);
return rsize;
}
static int
fg_read (const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi)
{
TRACE_CALL ("%s, %p, %zu, %ld", path, buf, size, (long) offset);
char *r;
size_t rsize;
if (verbose)
fprintf (stderr, "fg_read: %s: size %zu offset %ju\n",
path, size, offset);
/* The guestfs protocol limits size to somewhere over 2MB. We just
* reduce the requested size here accordingly and push the problem
* up to every user. http://www.jwz.org/doc/worse-is-better.html
*/
const size_t limit = 2 * 1024 * 1024;
if (size > limit)
size = limit;
r = guestfs_pread (g, path, size, offset, &rsize);
if (r == NULL)
return error ();
/* This should never happen, but at least it stops us overflowing
* the output buffer if it does happen.
*/
if (rsize > size)
rsize = size;
memcpy (buf, r, rsize);
free (r);
return rsize;
}
