def has_run_dir(self):
""" Return bool does this system have a /run dir? Old OS's like RHEL 6 sometimes do not """
if self._has_run_dir != None:
return self._has_run_dir
try:
if not self.was_root_vol_mounted:
mount(self.root_volume, self.ROOT_MOUNT)
self._has_run_dir = Path(f"{self.ROOT_MOUNT}/run").exists()
finally:
if not self.was_root_vol_mounted:
unmount(self.ROOT_MOUNT)
return self._has_run_dir
def root_volume(self):
""" Return the path to the volume: the volume that contains /etc/fstab """
if self._root_volume:
# self._root_volume can be set here or during __init__()
return self._root_volume
self.debug_action(action="FIND ROOT VOLUME")
fstab_path = f"{self.ROOT_MOUNT}/etc/fstab"
if is_mounted(self.ROOT_MOUNT):
# something's already mounted to ROOT_MOUNT, validate it
fstab_contents = get_file_contents(fstab_path)
if not fstab_contents:
error("ERROR: Mounted root volume has no /etc/fstab",
exit=True)
device = get_mount(self.ROOT_MOUNT)["device"]
self._root_volume = device
debug(device)
self.debug_action(end=True)
return device
if self.devices is None:
error(
f"ERROR: Failed to find root partition - no devices specified",
exit=True)
_root_volume = None
# root volume wasn't mounted, mount each data volume until you find /etc/fstab
for vol_path in self.data_volumes:
debug(f"Checking for /etc/fstab in {vol_path}")
try:
mount(vol_path, self.ROOT_MOUNT)
if get_file_contents(fstab_path):
self._root_volume = vol_path
unmount(self.ROOT_MOUNT)
_root_volume = vol_path
break
finally:
unmount(self.ROOT_MOUNT)
debug(f"> root volume = {_root_volume}")
self.debug_action(end=True)
if _root_volume is None:
error(
f"ERROR: Failed to find a root volume on devices: {self.devices}",
exit=True)
self._root_volume = _root_volume
return _root_volume
def mount_volumes(self, print_progress=False):
""" Mount the /etc/fstab and device volumes into the chroot root dir """
self.debug_action(action="MOUNT ALL VOLUMES")
# Mount the root volume
debug("Collect the ordered mount options")
ordered_mount_opts = self.get_ordered_mount_opts() # unmounts root
debug(f"Mounting root volume {self.root_volume} to {self.ROOT_MOUNT}")
mount(self.root_volume, self.ROOT_MOUNT)
if print_progress:
print(f"mount {self.root_volume} {self.ROOT_MOUNT}")
# Mount the other volumes
for mount_opts in ordered_mount_opts:
if mount_opts["mnt_to"] == self.ROOT_MOUNT:
continue
if print_progress:
bind = "--bind" if mount_opts["bind"] else ""
print(
f"mount {mount_opts['mnt_from']} {mount_opts['mnt_to']} {bind}"
)
mount(mount_opts["mnt_from"],
mount_opts["mnt_to"],
bind=mount_opts["bind"])
self.debug_action(end=True)
def mount_root(self):
""" Mount the root device if it isn't mounted """
mount(self.root_volume, self.ROOT_MOUNT)