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Filter bind mounts from imgutil capture

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If bind mounts are in use, it will foul the capture.

Notably, one example is if you install the firefox snap in
ubuntu, snapd creates a bind mount.

This will ignore bind mounts, and rely upon the system to
put it straight.
This commit is contained in:
Jarrod Johnson 2023-11-08 09:37:44 -05:00
parent 8f927d94e9
commit e90f2829ab
1 changed files with 15 additions and 1 deletions
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16
imgutil/imgutil
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@ -61,13 +61,27 @@ FALLOC_FL_PUNCH_HOLE = 2
numregex = re.compile('([0-9]+)')
def get_partition_info():
with open('/proc/self/mountinfo') as procinfo:
mountinfo = procinfo.read()
capmounts = set([])
for entry in mountinfo.split('\n'):
if not entry:
continue
firstinf, lastinf = entry.split(' - ')
root, mount = firstinf.split()[3:5]
filesystem = lastinf.split()[0]
if root != '/':
continue
if filesystem not in ('ext3', 'ext4', 'xfs', 'btrfs', 'vfat'):
continue
capmounts.add(mount)
with open('/proc/mounts') as procmounts:
mountinfo = procmounts.read()
for entry in mountinfo.split('\n'):
if not entry:
continue
dev, mount, fs, flags = entry.split()[:4]
if fs not in ('ext3', 'ext4', 'xfs', 'btrfs', 'vfat'):
if mount not in capmounts:
continue
fsinfo = os.statvfs(mount)
partinfo = {