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c0ae09f355
This patches makes locating the file database containing the file and
folder usernames and permissions more reliable.
In addition to locating it relative to the partition directory, we also
try to locate it relative to the IMAGE_ROOTFS.
Prior to this patch, the database was not found when using
--rootfs-dir=${IMAGE_ROOTFS}/<x> in the WIC script, leading to erronous file
permissions and ownership.
(From OE-Core rev: 09e18ee246da8b56f446c4db548fb9c7e895142b)
Signed-off-by: Felix Moessbauer <felix.moessbauer@siemens.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
237 lines
10 KiB
Python
237 lines
10 KiB
Python
#
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# Copyright (c) 2014, Intel Corporation.
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#
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# SPDX-License-Identifier: GPL-2.0-only
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#
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# DESCRIPTION
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# This implements the 'rootfs' source plugin class for 'wic'
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#
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# AUTHORS
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# Tom Zanussi <tom.zanussi (at] linux.intel.com>
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# Joao Henrique Ferreira de Freitas <joaohf (at] gmail.com>
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#
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import logging
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import os
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import shutil
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import sys
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from oe.path import copyhardlinktree
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from pathlib import Path
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from wic import WicError
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from wic.pluginbase import SourcePlugin
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from wic.misc import get_bitbake_var, exec_native_cmd
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logger = logging.getLogger('wic')
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class RootfsPlugin(SourcePlugin):
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"""
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Populate partition content from a rootfs directory.
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"""
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name = 'rootfs'
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@staticmethod
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def __validate_path(cmd, rootfs_dir, path):
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if os.path.isabs(path):
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logger.error("%s: Must be relative: %s" % (cmd, orig_path))
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sys.exit(1)
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# Disallow climbing outside of parent directory using '..',
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# because doing so could be quite disastrous (we will delete the
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# directory, or modify a directory outside OpenEmbedded).
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full_path = os.path.realpath(os.path.join(rootfs_dir, path))
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if not full_path.startswith(os.path.realpath(rootfs_dir)):
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logger.error("%s: Must point inside the rootfs:" % (cmd, path))
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sys.exit(1)
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return full_path
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@staticmethod
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def __get_rootfs_dir(rootfs_dir):
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if rootfs_dir and os.path.isdir(rootfs_dir):
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return os.path.realpath(rootfs_dir)
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image_rootfs_dir = get_bitbake_var("IMAGE_ROOTFS", rootfs_dir)
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if not os.path.isdir(image_rootfs_dir):
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raise WicError("No valid artifact IMAGE_ROOTFS from image "
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"named %s has been found at %s, exiting." %
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(rootfs_dir, image_rootfs_dir))
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return os.path.realpath(image_rootfs_dir)
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@staticmethod
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def __get_pseudo(native_sysroot, rootfs, pseudo_dir):
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pseudo = "export PSEUDO_PREFIX=%s/usr;" % native_sysroot
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pseudo += "export PSEUDO_LOCALSTATEDIR=%s;" % pseudo_dir
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pseudo += "export PSEUDO_PASSWD=%s;" % rootfs
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pseudo += "export PSEUDO_NOSYMLINKEXP=1;"
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pseudo += "%s " % get_bitbake_var("FAKEROOTCMD")
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return pseudo
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@classmethod
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def do_prepare_partition(cls, part, source_params, cr, cr_workdir,
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oe_builddir, bootimg_dir, kernel_dir,
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krootfs_dir, native_sysroot):
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"""
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Called to do the actual content population for a partition i.e. it
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'prepares' the partition to be incorporated into the image.
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In this case, prepare content for legacy bios boot partition.
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"""
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if part.rootfs_dir is None:
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if not 'ROOTFS_DIR' in krootfs_dir:
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raise WicError("Couldn't find --rootfs-dir, exiting")
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rootfs_dir = krootfs_dir['ROOTFS_DIR']
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else:
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if part.rootfs_dir in krootfs_dir:
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rootfs_dir = krootfs_dir[part.rootfs_dir]
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elif part.rootfs_dir:
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rootfs_dir = part.rootfs_dir
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else:
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raise WicError("Couldn't find --rootfs-dir=%s connection or "
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"it is not a valid path, exiting" % part.rootfs_dir)
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part.rootfs_dir = cls.__get_rootfs_dir(rootfs_dir)
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part.has_fstab = os.path.exists(os.path.join(part.rootfs_dir, "etc/fstab"))
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pseudo_dir = os.path.join(part.rootfs_dir, "../pseudo")
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if not os.path.lexists(pseudo_dir):
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pseudo_dir = os.path.join(cls.__get_rootfs_dir(None), '../pseudo')
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if not os.path.lexists(pseudo_dir):
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logger.warn("%s folder does not exist. "
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"Usernames and permissions will be invalid " % pseudo_dir)
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pseudo_dir = None
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new_rootfs = None
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new_pseudo = None
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# Handle excluded paths.
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if part.exclude_path or part.include_path or part.change_directory or part.update_fstab_in_rootfs:
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# We need a new rootfs directory we can safely modify without
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# interfering with other tasks. Copy to workdir.
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new_rootfs = os.path.realpath(os.path.join(cr_workdir, "rootfs%d" % part.lineno))
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if os.path.lexists(new_rootfs):
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shutil.rmtree(os.path.join(new_rootfs))
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if part.change_directory:
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cd = part.change_directory
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if cd[-1] == '/':
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cd = cd[:-1]
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orig_dir = cls.__validate_path("--change-directory", part.rootfs_dir, cd)
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else:
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orig_dir = part.rootfs_dir
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copyhardlinktree(orig_dir, new_rootfs)
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# Convert the pseudo directory to its new location
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if (pseudo_dir):
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new_pseudo = os.path.realpath(
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os.path.join(cr_workdir, "pseudo%d" % part.lineno))
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if os.path.lexists(new_pseudo):
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shutil.rmtree(new_pseudo)
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os.mkdir(new_pseudo)
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shutil.copy(os.path.join(pseudo_dir, "files.db"),
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os.path.join(new_pseudo, "files.db"))
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pseudo_cmd = "%s -B -m %s -M %s" % (cls.__get_pseudo(native_sysroot,
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new_rootfs,
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new_pseudo),
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orig_dir, new_rootfs)
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exec_native_cmd(pseudo_cmd, native_sysroot)
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for in_path in part.include_path or []:
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#parse arguments
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include_path = in_path[0]
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if len(in_path) > 2:
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logger.error("'Invalid number of arguments for include-path")
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sys.exit(1)
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if len(in_path) == 2:
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path = in_path[1]
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else:
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path = None
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# Pack files to be included into a tar file.
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# We need to create a tar file, because that way we can keep the
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# permissions from the files even when they belong to different
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# pseudo enviroments.
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# If we simply copy files using copyhardlinktree/copytree... the
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# copied files will belong to the user running wic.
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tar_file = os.path.realpath(
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os.path.join(cr_workdir, "include-path%d.tar" % part.lineno))
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if os.path.isfile(include_path):
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parent = os.path.dirname(os.path.realpath(include_path))
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tar_cmd = "tar c --owner=root --group=root -f %s -C %s %s" % (
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tar_file, parent, os.path.relpath(include_path, parent))
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exec_native_cmd(tar_cmd, native_sysroot)
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else:
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if include_path in krootfs_dir:
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include_path = krootfs_dir[include_path]
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include_path = cls.__get_rootfs_dir(include_path)
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include_pseudo = os.path.join(include_path, "../pseudo")
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if os.path.lexists(include_pseudo):
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pseudo = cls.__get_pseudo(native_sysroot, include_path,
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include_pseudo)
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tar_cmd = "tar cf %s -C %s ." % (tar_file, include_path)
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else:
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pseudo = None
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tar_cmd = "tar c --owner=root --group=root -f %s -C %s ." % (
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tar_file, include_path)
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exec_native_cmd(tar_cmd, native_sysroot, pseudo)
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#create destination
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if path:
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destination = cls.__validate_path("--include-path", new_rootfs, path)
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Path(destination).mkdir(parents=True, exist_ok=True)
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else:
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destination = new_rootfs
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#extract destination
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untar_cmd = "tar xf %s -C %s" % (tar_file, destination)
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if new_pseudo:
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pseudo = cls.__get_pseudo(native_sysroot, new_rootfs, new_pseudo)
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else:
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pseudo = None
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exec_native_cmd(untar_cmd, native_sysroot, pseudo)
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os.remove(tar_file)
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for orig_path in part.exclude_path or []:
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path = orig_path
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full_path = cls.__validate_path("--exclude-path", new_rootfs, path)
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if not os.path.lexists(full_path):
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continue
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if new_pseudo:
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pseudo = cls.__get_pseudo(native_sysroot, new_rootfs, new_pseudo)
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else:
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pseudo = None
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if path.endswith(os.sep):
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# Delete content only.
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for entry in os.listdir(full_path):
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full_entry = os.path.join(full_path, entry)
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rm_cmd = "rm -rf %s" % (full_entry)
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exec_native_cmd(rm_cmd, native_sysroot, pseudo)
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else:
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# Delete whole directory.
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rm_cmd = "rm -rf %s" % (full_path)
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exec_native_cmd(rm_cmd, native_sysroot, pseudo)
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# Update part.has_fstab here as fstab may have been added or
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# removed by the above modifications.
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part.has_fstab = os.path.exists(os.path.join(new_rootfs, "etc/fstab"))
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if part.update_fstab_in_rootfs and part.has_fstab and not part.no_fstab_update:
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fstab_path = os.path.join(new_rootfs, "etc/fstab")
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# Assume that fstab should always be owned by root with fixed permissions
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install_cmd = "install -m 0644 %s %s" % (part.updated_fstab_path, fstab_path)
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if new_pseudo:
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pseudo = cls.__get_pseudo(native_sysroot, new_rootfs, new_pseudo)
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else:
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pseudo = None
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exec_native_cmd(install_cmd, native_sysroot, pseudo)
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part.prepare_rootfs(cr_workdir, oe_builddir,
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new_rootfs or part.rootfs_dir, native_sysroot,
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pseudo_dir = new_pseudo or pseudo_dir)
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