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#
# Copyright 2020 Ettus Research, a National Instruments Brand
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
"""
Utilities for creating a mount point
"""
import subprocess
import os
from usrp_mpm.mpmlog import get_logger
class Mount():
"""
Class for creating a mount point
"""
def __init__(self, devicepath, mountpoint, options=None, log=None):
assert isinstance(devicepath, str)
assert isinstance(mountpoint, str)
assert isinstance(options, list)
self.devicepath = devicepath
self.mountpoint = mountpoint
self.options = options
if log is None:
self.log = get_logger("Mount")
else:
self.log = log.getChild("Mount")
self.log.trace("Early initialization: devicepath={}, mountpoint={}, options={}".format(
devicepath, mountpoint, options))
def ismounted(self):
"""
Returns true if the mount point is mounted
"""
assert self.devicepath is not None
with open("/etc/mtab") as mtab_f:
return any(
line.split()[0] == self.devicepath and line.split()[1] == self.mountpoint \
for line in mtab_f
)
def get_mount_point(self):
"""
returns the mount point (None when not mounted)
"""
if not self.ismounted():
return None
return self.mountpoint
def prepare_mountpoint(self):
"""
Creates the mount point directory (if not already existing)
"""
if not os.path.exists(self.mountpoint):
os.makedirs(self.mountpoint)
return True
def delete_mountpoint(self):
"""
Deletes the mount point directory
"""
os.removedirs(self.mountpoint)
return True
def mount(self):
"""
Mounts the mount point
"""
if self.ismounted():
self.log.debug("{} was already mounted".format(self.mountpoint))
return True
self.prepare_mountpoint()
self.log.debug("Mounting {}".format(self.mountpoint))
cmd = ['mount']
if self.options:
cmd.extend(self.options)
cmd.append(self.devicepath)
cmd.append(self.mountpoint)
proc = subprocess.run(cmd, check=True)
self.log.trace(proc)
return True
def unmount(self):
"""
Unmounts the mount point
"""
if not self.ismounted():
self.log.warning("{} was not mounted".format(self.mountpoint))
return True
self.log.debug("Unmounting {}".format(self.mountpoint))
cmd = ['umount', self.mountpoint]
proc = subprocess.run(cmd, check=True)
self.log.trace(proc)
self.delete_mountpoint()
return True
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