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-rw-r--r--src/utils/fs.py36
1 files changed, 29 insertions, 7 deletions
diff --git a/src/utils/fs.py b/src/utils/fs.py
index 5bc7956..9f9f98b 100644
--- a/src/utils/fs.py
+++ b/src/utils/fs.py
@@ -237,11 +237,28 @@ def _reduce_ntfsresize(partdev):
# The first split operation leaves the wanted data at the second element of
# the split ([1]). Finally do a second split with ' ' to get the data but
# nothing else following it.
- #
- # In addition, increase by 10%+1K the reported shrink location on which the
- # filesystem can be resized according to ntfsresize.
- size = int(out_info.split('device size: ')[1].split(' ')[0])
- new_size = int(int(out_info.split('resize at ')[1].split(' ')[0])*1.1+1024)
+ def parse_ntfsresize(output_data, pattern):
+ data_split = output_data.split(pattern)
+ # If we fail to match pattern in the split then data_split will contain [output_data]
+ if len(data_split) == 1:
+ logging.error(f'nfsresize: failed to find: "{pattern}"')
+ raise ValueError(f'nfsresize: failed to find: "{pattern}"')
+ value_str = data_split[1].split(' ')[0]
+
+ if not value_str.isdigit() or value_str.startswith('-'):
+ logging.error(f'nfsresize: failed to parse numeric value at "{pattern}"')
+ raise ValueError(f'nfsresize: failed to parse numeric value at "{pattern}"')
+ return int(value_str)
+
+ try:
+ size = parse_ntfsresize(out_info, 'device size: ')
+ new_size = parse_ntfsresize(out_info, 'resize at ')
+ # Increase by 10%+1K the indicated reduction by which the file system
+ # can be resized according to ntfsresize.
+ new_size = int(new_size * 1.1 + 1024)
+ except ValueError:
+ return -1
+
# Run ntfsresize with -n to to probe for the smallest size, this loop is
# intentional. Acumulate size until ntfsresize in dry-run mode fails, then
@@ -262,8 +279,13 @@ def _reduce_ntfsresize(partdev):
if out_resize_dryrun.find('Needed relocations : ') == -1:
break
- extra_size = int(out_resize_dryrun.split('Needed relocations : ')[1].split(' ')[0])*1.1+1024
- new_size += int(extra_size)
+ try:
+ extra_size = parse_ntfsresize(out_resize_dryrun, 'Needed relocations : ')
+ # Add size padding
+ extra_size = int(extra_size * 1.1 + 1024)
+ new_size += extra_size
+ except ValueError:
+ return -1
if new_size < size:
cmd_resize = shlex.split(f'ntfsresize -fs {new_size:.0f} {partdev}')