diff options
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/lib/wic/filemap.py | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/scripts/lib/wic/filemap.py b/scripts/lib/wic/filemap.py index 77e32b9add..a72fa09ef5 100644 --- a/scripts/lib/wic/filemap.py +++ b/scripts/lib/wic/filemap.py @@ -37,7 +37,15 @@ def get_block_size(file_obj): # Get the block size of the host file-system for the image file by calling # the FIGETBSZ ioctl (number 2). binary_data = fcntl.ioctl(file_obj, 2, struct.pack('I', 0)) - return struct.unpack('I', binary_data)[0] + bsize = struct.unpack('I', binary_data)[0] + if not bsize: + import os + stat = os.fstat(file_obj.fileno()) + if hasattr(stat, 'st_blksize'): + bsize = stat.st_blksize + else: + raise IOError("Unable to determine block size") + return bsize class ErrorNotSupp(Exception): """ |