diff options
Diffstat (limited to 'scripts/lib/wic/filemap.py')
| -rw-r--r-- | scripts/lib/wic/filemap.py | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/scripts/lib/wic/filemap.py b/scripts/lib/wic/filemap.py index a3919fbcad..c53147c2f1 100644 --- a/scripts/lib/wic/filemap.py +++ b/scripts/lib/wic/filemap.py @@ -34,9 +34,11 @@ def get_block_size(file_obj): # the FIGETBSZ ioctl (number 2). try: binary_data = fcntl.ioctl(file_obj, 2, struct.pack('I', 0)) + bsize = struct.unpack('I', binary_data)[0] except OSError: - raise IOError("Unable to determine block size") - bsize = struct.unpack('I', binary_data)[0] + bsize = None + + # If ioctl causes OSError or give bsize to zero failback to os.fstat if not bsize: import os stat = os.fstat(file_obj.fileno()) |