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import logging
import os
import tempfile
from subprocess import run
from . import log, rmdir
__all__ = ["mount"]
L = logging.getLogger(__name__)
@log
def mount(path, offset):
"""Mount a Linux Logical Volume Manager (LVM) volume system using
`libvslvm`.
See also:
https://github.com/libyal/libvslvm/wiki/Mounting
https://github.com/libyal/libvslvm/wiki/Building
Make sure you have downloaded the latest source distribution package from
https://github.com/libyal/libvslvm/releases, e.g.
libvslvm-experimental-20210807.tar.gz and built it as follows:
$ sudo apt install build-essential libfuse-dev
$ tar xfv libvslvm-experimental-20210807.tar.gz
$ cd libvslvm-20210807/
$ ./configure
$ make
$ sudo make install
$ sudo ldconfig
Args:
path (str): Path to the RAW image file containing LVM volume system.
offset (str|int): Value in bytes where the LVM volume system starts.
Returns:
Path to the directory containing volumes as a virtual file named
`lvm1`, `lvm2`, etc.
"""
mp = tempfile.mkdtemp()
cmd = ["vslvmmount", "-o", str(offset), path, mp]
try:
p = run(cmd, capture_output=True, check=False, text=True)
except Exception as e:
L.error("failed to execute command %s: %r", cmd, e)
rmdir(mp)
return ""
out, err = p.stdout.strip(), p.stderr.strip()
if p.returncode or not os.path.ismount(mp):
L.error("retcode: %d, stdout: %s, stderr: %s", p.returncode, out, err)
rmdir(mp)
return ""
return mp
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