#!/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
from mic import msger
from mic.utils import misc, fs_related, runner
from mic.utils.errors import CreatorError, MountError
from mic.utils.partitionedfs import PartitionedMount
from mic.imager.livecd import LiveCDImageCreator
class LiveUSBImageCreator(LiveCDImageCreator):
def __init__(self, *args):
LiveCDImageCreator.__init__(self, *args)
self._dep_checks.extend(["kpartx", "parted"])
# remove dependency of genisoimage in parent class
if "genisoimage" in self._dep_checks:
self._dep_checks.remove("genisoimage")
def _create_usbimg(self, isodir):
overlaysizemb = 64 #default
#skipcompress = self.skip_compression?
fstype = "vfat"
homesizemb=0
swapsizemb=0
homefile="home.img"
plussize=128
kernelargs=None
if fstype == 'vfat':
if overlaysizemb > 2047:
raise CreatorError("Can't have an overlay of 2048MB or "
"greater on VFAT")
if homesizemb > 2047:
raise CreatorError("Can't have an home overlay of 2048MB or "
"greater on VFAT")
if swapsizemb > 2047:
raise CreatorError("Can't have an swap overlay of 2048MB or "
"greater on VFAT")
livesize = misc.get_file_size(isodir + "/LiveOS")
usbimgsize = (overlaysizemb + \
homesizemb + \
swapsizemb + \
livesize + \
plussize) * 1024L * 1024L
disk = fs_related.SparseLoopbackDisk("%s/%s.usbimg" \
% (self._outdir, self.name),
usbimgsize)
usbmnt = self._mkdtemp("usb-mnt")
usbloop = PartitionedMount(usbmnt)
usbloop.add_disk('/dev/sdb', disk)
usbloop.add_partition(usbimgsize/1024/1024,
"/dev/sdb",
"/",
fstype,
boot=True)
usbloop.mount()
try:
fs_related.makedirs(usbmnt + "/LiveOS")
if os.path.exists(isodir + "/LiveOS/squashfs.img"):
shutil.copyfile(isodir + "/LiveOS/squashfs.img",
usbmnt + "/LiveOS/squashfs.img")
else:
fs_related.mksquashfs(os.path.dirname(self._image),
usbmnt + "/LiveOS/squashfs.img")
if os.path.exists(isodir + "/LiveOS/osmin.img"):
shutil.copyfile(isodir + "/LiveOS/osmin.img",
usbmnt + "/LiveOS/osmin.img")
if fstype == "vfat" or fstype == "msdos":
uuid = usbloop.partitions[0]['mount'].uuid
label = usbloop.partitions[0]['mount'].fslabel
usblabel = "UUID=%s-%s" % (uuid[0:4], uuid[4:8])
overlaysuffix = "-%s-%s-%s" % (label, uuid[0:4], uuid[4:8])
else:
diskmount = usbloop.partitions[0]['mount']
usblabel = "UUID=%s" % diskmount.uuid
overlaysuffix = "-%s-%s" % (diskmount.fslabel, diskmount.uuid)
args = ['cp', "-Rf", isodir + "/isolinux", usbmnt + "/syslinux"]
rc = runner.show(args)
if rc:
raise CreatorError("Can't copy isolinux directory %s" \
% (isodir + "/isolinux/*"))
if os.path.isfile("/usr/share/syslinux/isolinux.bin"):
syslinux_path = "/usr/share/syslinux"
elif os.path.isfile("/usr/lib/syslinux/isolinux.bin"):
syslinux_path = "/usr/lib/syslinux"
else:
raise CreatorError("syslinux not installed : "
"cannot find syslinux installation path")
for f in ("isolinux.bin", "vesamenu.c32"):
path = os.path.join(syslinux_path, f)
if os.path.isfile(path):
args = ['cp', path, usbmnt + "/syslinux/"]
rc = runner.show(args)
if rc:
raise CreatorError("Can't copy syslinux file " + path)
else:
raise CreatorError("syslinux not installed: "
"syslinux file %s not found" % path)
fd = open(isodir + "/isolinux/isolinux.cfg", "r")
text = fd.read()
fd.close()
pattern = re.compile('CDLABEL=[^ ]*')
text = pattern.sub(usblabel, text)
pattern = re.compile('rootfstype=[^ ]*')
text = pattern.sub("rootfstype=" + fstype, text)
if kernelargs:
text = text.replace("rd.live.image", "rd.live.image " + kernelargs)
if overlaysizemb > 0:
msger.info("Initializing persistent overlay file")
overfile = "overlay" + overlaysuffix
if fstype == "vfat":
args = ['dd',
"if=/dev/zero",
"of=" + usbmnt + "/LiveOS/" + overfile,
"count=%d" % overlaysizemb,
"bs=1M"]
else:
args = ['dd',
"if=/dev/null",
"of=" + usbmnt + "/LiveOS/" + overfile,
"count=1",
"bs=1M",
"seek=%d" % overlaysizemb]
rc = runner.show(args)
if rc:
raise CreatorError("Can't create overlay file")
text = text.replace("rd.live.image", "rd.live.image rd.live.overlay=" + usblabel)
text = text.replace(" ro ", " rw ")
if swapsizemb > 0:
msger.info("Initializing swap file")
swapfile = usbmnt + "/LiveOS/" + "swap.img"
args = ['dd',
"if=/dev/zero",
"of=" + swapfile,
"count=%d" % swapsizemb,
"bs=1M"]
rc = runner.show(args)
if rc:
raise CreatorError("Can't create swap file")
args = ["mkswap", "-f", swapfile]
rc = runner.show(args)
if rc:
raise CreatorError("Can't mkswap on swap file")
if homesizemb > 0:
msger.info("Initializing persistent /home")
homefile = usbmnt + "/LiveOS/" + homefile
if fstype == "vfat":
args = ['dd',
"if=/dev/zero",
"of=" + homefile,
"count=%d" % homesizemb,
"bs=1M"]
else:
args = ['dd',
"if=/dev/null",
"of=" + homefile,
"count=1",
"bs=1M",
"seek=%d" % homesizemb]
rc = runner.show(args)
if rc:
raise CreatorError("Can't create home file")
mkfscmd = fs_related.find_binary_path("/sbin/mkfs." + fstype)
if fstype == "ext2" or fstype == "ext3":
args = [mkfscmd, "-F", "-j", homefile]
else:
args = [mkfscmd, homefile]
rc = runner.show(args)
if rc:
raise CreatorError("Can't mke2fs home file")
if fstype == "ext2" or fstype == "ext3":
tune2fs = fs_related.find_binary_path("tune2fs")
args = [tune2fs,
"-c0",
"-i0",
"-ouser_xattr,acl",
homefile]
rc = runner.show(args)
if rc:
raise CreatorError("Can't tune2fs home file")
if fstype == "vfat" or fstype == "msdos":
syslinuxcmd = fs_related.find_binary_path("syslinux")
syslinuxcfg = usbmnt + "/syslinux/syslinux.cfg"
args = [syslinuxcmd,
"-d",
"syslinux",
usbloop.partitions[0]["device"]]
elif fstype == "ext2" or fstype == "ext3":
extlinuxcmd = fs_related.find_binary_path("extlinux")
syslinuxcfg = usbmnt + "/syslinux/extlinux.conf"
args = [extlinuxcmd,
"-i",
usbmnt + "/syslinux"]
else:
raise CreatorError("Invalid file system type: %s" % (fstype))
os.unlink(usbmnt + "/syslinux/isolinux.cfg")
fd = open(syslinuxcfg, "w")
fd.write(text)
fd.close()
rc = runner.show(args)
if rc:
raise CreatorError("Can't install boot loader.")
finally:
usbloop.unmount()
usbloop.cleanup()
# Need to do this after image is unmounted and device mapper is closed
msger.info("set MBR")
mbrfile = "/usr/lib/syslinux/mbr.bin"
if not os.path.exists(mbrfile):
mbrfile = "/usr/share/syslinux/mbr.bin"
if not os.path.exists(mbrfile):
raise CreatorError("mbr.bin file didn't exist.")
mbrsize = os.path.getsize(mbrfile)
outimg = "%s/%s.usbimg" % (self._outdir, self.name)
args = ['dd',
"if=" + mbrfile,
"of=" + outimg,
"seek=0",
"conv=notrunc",
"bs=1",
"count=%d" % (mbrsize)]
rc = runner.show(args)
if rc:
raise CreatorError("Can't set MBR.")
def _stage_final_image(self):
try:
isodir = self._get_isodir()
fs_related.makedirs(isodir + "/LiveOS")
minimal_size = self._resparse()
if not self.skip_minimize:
fs_related.create_image_minimizer(isodir + "/LiveOS/osmin.img",
self._image,
minimal_size)
if self.skip_compression:
shutil.move(self._image,
isodir + "/LiveOS/ext3fs.img")
else:
fs_related.makedirs(os.path.join(
os.path.dirname(self._image),
"LiveOS"))
shutil.move(self._image,
os.path.join(os.path.dirname(self._image),
"LiveOS", "ext3fs.img"))
fs_related.mksquashfs(os.path.dirname(self._image),
isodir + "/LiveOS/squashfs.img")
self._create_usbimg(isodir)
if self.pack_to:
usbimg = os.path.join(self._outdir, self.name + ".usbimg")
packimg = os.path.join(self._outdir, self.pack_to)
misc.packing(packimg, usbimg)
os.unlink(usbimg)
finally:
shutil.rmtree(isodir, ignore_errors = True)
self._set_isodir(None)