From 996013b4e5d3cd1c054e87539ac1a8d95581a87f Mon Sep 17 00:00:00 2001 From: Kalle Lampila Date: Tue, 31 Dec 2019 17:10:49 +0200 Subject: wic/filemap: If FIGETBSZ iotctl fail, failback to os.stat Some file systems don't support fetching the block size (notably the file system Docker uses for containers), so if iotctl() fail, try to use failback via os.stat() to get block size. Signed-off-by: Kalle lampila Signed-off-by: Richard Purdie (cherry picked from commit e219f5175177a640dd62833082ea19adc1c13d42) Signed-off-by: Armin Kuster --- scripts/lib/wic/filemap.py | 6 ++++-- 1 file 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()) -- cgit 1.2.3-korg