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6fdbc5144f
When embedding a rootfs image (e.g. 'rootfs-dir') as a partition we
might want to keep the stock fstab for that image. In such a case, use
this option to not update the fstab and use the stock one instead.
This option allows you to specify which partitions get the fstab
updated and which get the stock fstab.
The option matches the argument you can pass to wic itself where the
same action is performed but for all the partitions.
Example:
part /export --source rootfs --rootfs-dir=hockeycam-image
--fstype=ext4 --label export --align 1024 --no-fstab-update
part / --source rootfs --fstype=ext4 --label rootfs --align 1024
(From OE-Core rev: ab4c95af8ecd15dc136194ab761afae756db5803)
Signed-off-by: Daniel Gomez <daniel@qtec.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
234 lines
10 KiB
Python
234 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 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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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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