From c19f78a0713c8ac9d28b78f86c6d7b96157788f0 Mon Sep 17 00:00:00 2001 From: Ed Bartosh Date: Tue, 13 Jun 2017 14:21:50 +0300 Subject: filemap: fix skip logic Fixed bug in processing 'skip' parameter: don't read input file if end of bmap block is less than skip Simplified logic of positioning to the start of data inside a partially skipped bmap block. Signed-off-by: Ed Bartosh Signed-off-by: Richard Purdie --- scripts/lib/wic/filemap.py | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'scripts') diff --git a/scripts/lib/wic/filemap.py b/scripts/lib/wic/filemap.py index 1f1aacc522..585b7ea84e 100644 --- a/scripts/lib/wic/filemap.py +++ b/scripts/lib/wic/filemap.py @@ -545,11 +545,14 @@ def sparse_copy(src_fname, dst_fname, offset=0, skip=0, api=None): start = first * fmap.block_size end = (last + 1) * fmap.block_size + if skip >= end: + continue + if start < skip < end: - fmap._f_image.seek(skip, os.SEEK_SET) - else: - fmap._f_image.seek(start, os.SEEK_SET) - dst_file.seek(offset + start, os.SEEK_SET) + start = skip + + fmap._f_image.seek(start, os.SEEK_SET) + dst_file.seek(offset + start - skip, os.SEEK_SET) chunk_size = 1024 * 1024 to_read = end - start -- cgit 1.2.3-korg