diff options
Diffstat (limited to 'morphlib/xfer-hole')
-rwxr-xr-x | morphlib/xfer-hole | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/morphlib/xfer-hole b/morphlib/xfer-hole index 0d4cee7a..22ee06bf 100755 --- a/morphlib/xfer-hole +++ b/morphlib/xfer-hole @@ -120,8 +120,14 @@ def make_xfer_instructions(fd): def copy_slice_from_file(to, fd, start, end): safe_lseek(fd, start, os.SEEK_SET) - data = os.read(fd, end - start) - to.write(data) + nbytes = end - start + max_at_a_time = 1024**2 + while nbytes > 0: + data = os.read(fd, min(nbytes, max_at_a_time)) + if not data: + break + to.write(data) + nbytes -= len(data) for kind, start, end in make_xfer_instructions(fd): |