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raw_plugin.py
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raw_plugin.py
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#!/usr/bin/python -tt
#
# Copyright (c) 2011 Intel, Inc.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the Free
# Software Foundation; version 2 of the License
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc., 59
# Temple Place - Suite 330, Boston, MA 02111-1307, USA.
import os
import shutil
import re
import tempfile
from mic import chroot, msger
from mic.utils import misc, fs_related, errors, runner
from mic.conf import configmgr
from mic.plugin import pluginmgr
from mic.utils.partitionedfs import PartitionedMount
import mic.imager.raw as raw
from mic.pluginbase import ImagerPlugin
class RawPlugin(ImagerPlugin):
name = 'raw'
@classmethod
def do_create(self, subcmd, opts, *args):
"""${cmd_name}: create raw image
${cmd_usage}
${cmd_option_list}
"""
if not args:
raise errors.Usage("More arguments needed")
if len(args) != 1:
raise errors.Usage("Extra arguments given")
creatoropts = configmgr.create
ksconf = args[0]
if not os.path.exists(ksconf):
raise errors.CreatorError("Can't find the file: %s" % ksconf)
recording_pkgs = []
if len(creatoropts['record_pkgs']) > 0:
recording_pkgs = creatoropts['record_pkgs']
if creatoropts['release'] is not None:
if 'name' not in recording_pkgs:
recording_pkgs.append('name')
ksconf = misc.save_ksconf_file(ksconf, creatoropts['release'])
configmgr._ksconf = ksconf
# Called After setting the configmgr._ksconf as the creatoropts['name'] is reset there.
if creatoropts['release'] is not None:
creatoropts['outdir'] = "%s/%s/images/%s/" % (creatoropts['outdir'], creatoropts['release'], creatoropts['name'])
# try to find the pkgmgr
pkgmgr = None
for (key, pcls) in pluginmgr.get_plugins('backend').iteritems():
if key == creatoropts['pkgmgr']:
pkgmgr = pcls
break
if not pkgmgr:
pkgmgrs = pluginmgr.get_plugins('backend').keys()
raise errors.CreatorError("Can't find package manager: %s (availables: %s)" % (creatoropts['pkgmgr'], ', '.join(pkgmgrs)))
creator = raw.RawImageCreator(creatoropts, pkgmgr)
if len(recording_pkgs) > 0:
creator._recording_pkgs = recording_pkgs
if creatoropts['release'] is None:
imagefile = "%s-sda.raw" % os.path.join(creator.destdir, creator.name)
if os.path.exists(imagefile):
if msger.ask('The target image: %s already exists, cleanup and continue?' % imagefile):
os.unlink(imagefile)
else:
raise errors.Abort('Canceled')
try:
creator.check_depend_tools()
creator.mount(None, creatoropts["cachedir"])
creator.install()
creator.configure(creatoropts["repomd"])
creator.unmount()
creator.package(creatoropts["outdir"])
if creatoropts['release'] is not None:
creator.release_output(ksconf, creatoropts['outdir'], creatoropts['release'])
creator.print_outimage_info()
except errors.CreatorError:
raise
finally:
creator.cleanup()
msger.info("Finished.")
return 0
@classmethod
def do_chroot(cls, target):
img = target
imgsize = misc.get_file_size(img) * 1024L * 1024L
partedcmd = fs_related.find_binary_path("parted")
disk = fs_related.SparseLoopbackDisk(img, imgsize)
imgmnt = misc.mkdtemp()
imgloop = PartitionedMount({'/dev/sdb':disk}, imgmnt, skipformat = True)
img_fstype = "ext3"
# Check the partitions from raw disk.
root_mounted = False
partition_mounts = 0
for line in runner.outs([partedcmd,"-s",img,"unit","B","print"]).splitlines():
line = line.strip()
# Lines that start with number are the partitions,
# because parted can be translated we can't refer to any text lines.
if not line or not line[0].isdigit():
continue
# Some vars have extra , as list seperator.
line = line.replace(",","")
# Example of parted output lines that are handled:
# Number Start End Size Type File system Flags
# 1 512B 3400000511B 3400000000B primary
# 2 3400531968B 3656384511B 255852544B primary linux-swap(v1)
# 3 3656384512B 3720347647B 63963136B primary fat16 boot, lba
partition_info = re.split("\s+",line)
size = partition_info[3].split("B")[0]
if len(partition_info) < 6 or partition_info[5] in ["boot"]:
# No filesystem can be found from partition line. Assuming
# btrfs, because that is the only MeeGo fs that parted does
# not recognize properly.
# TODO: Can we make better assumption?
fstype = "btrfs"
elif partition_info[5] in ["ext2","ext3","ext4","btrfs"]:
fstype = partition_info[5]
elif partition_info[5] in ["fat16","fat32"]:
fstype = "vfat"
elif "swap" in partition_info[5]:
fstype = "swap"
else:
raise errors.CreatorError("Could not recognize partition fs type '%s'." % partition_info[5])
if not root_mounted and fstype in ["ext2","ext3","ext4","btrfs"]:
# TODO: Check that this is actually the valid root partition from /etc/fstab
mountpoint = "/"
root_mounted = True
elif fstype == "swap":
mountpoint = "swap"
else:
# TODO: Assing better mount points for the rest of the partitions.
partition_mounts += 1
mountpoint = "/media/partition_%d" % partition_mounts
if "boot" in partition_info:
boot = True
else:
boot = False
msger.verbose("Size: %s Bytes, fstype: %s, mountpoint: %s, boot: %s" % (size, fstype, mountpoint, boot))
# TODO: add_partition should take bytes as size parameter.
imgloop.add_partition((int)(size)/1024/1024, "/dev/sdb", mountpoint, fstype = fstype, boot = boot)
try:
imgloop.mount()
except errors.MountError:
imgloop.cleanup()
raise
try:
chroot.chroot(imgmnt, None, "/bin/env HOME=/root /bin/bash")
except:
raise errors.CreatorError("Failed to chroot to %s." %img)
finally:
chroot.cleanup_after_chroot("img", imgloop, None, imgmnt)
@classmethod
def do_unpack(cls, srcimg):
srcimgsize = (misc.get_file_size(srcimg)) * 1024L * 1024L
srcmnt = misc.mkdtemp("srcmnt")
disk = fs_related.SparseLoopbackDisk(srcimg, srcimgsize)
srcloop = PartitionedMount({'/dev/sdb':disk}, srcmnt, skipformat = True)
srcloop.add_partition(srcimgsize/1024/1024, "/dev/sdb", "/", "ext3", boot=False)
try:
srcloop.mount()
except errors.MountError:
srcloop.cleanup()
raise
image = os.path.join(tempfile.mkdtemp(dir = "/var/tmp", prefix = "tmp"), "target.img")
args = ['dd', "if=%s" % srcloop.partitions[0]['device'], "of=%s" % image]
msger.info("`dd` image ...")
rc = runner.show(args)
srcloop.cleanup()
shutil.rmtree(os.path.dirname(srcmnt), ignore_errors = True)
if rc != 0:
raise errors.CreatorError("Failed to dd")
else:
return image