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#!/usr/bin/python
# Copyright (C) 2009 Canonical Ltd.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3,
# as published by the Free Software Foundation.
#
# 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, see <http://www.gnu.org/licenses/>.
import logging, logging.handlers
import os, sys
import subprocess
import tempfile
# The minimum size, in megabytes a persistence file can be.
MIN_PERSISTENCE = 128
MAX_PERSISTENCE = 4096 # casper has issue creating a file bigger than 4GB
(CAN_USE, # Obvious.
CANNOT_USE, # The partition or disk is too small for the source image.
NEED_SPACE, # There is not enough free space, but there could be.
NEED_FORMAT, # The device has the wrong filesystem type, or the source is a
# disk image.
) = range(4)
SOURCE_CD, SOURCE_ISO, SOURCE_IMG = range(3)
MAX_LOG_SIZE = 1024 * 1024 * 1
MAX_LOG_BACKUP = 0
if sys.platform != 'win32':
from IN import INT_MAX
MAX_DBUS_TIMEOUT = INT_MAX / 1000.0
def setup_logging():
log = logging.getLogger('')
# usb-creator used to write ~/.usb-creator.log as root (whoops!), so lets
# use a different name here. -- ev
# new location so let's go back to original name =) -- xnox
cache_dir = os.getenv('XDG_CACHE_HOME', os.path.expanduser('~/.cache'))
log_file = os.path.join(cache_dir, 'usb-creator.log')
handler = None
try:
handler = logging.handlers.RotatingFileHandler(log_file,
maxBytes=MAX_LOG_SIZE, backupCount=MAX_LOG_BACKUP)
except IOError:
logging.exception('Could not set up file logging:')
if handler:
formatter = logging.Formatter('usb-creator %(asctime)s (%(levelname)s)'
' %(filename)s:%(lineno)d: %(message)s')
handler.setFormatter(formatter)
handler.setLevel(logging.DEBUG)
log.addHandler(handler)
log.setLevel(logging.DEBUG)
def format_size(size):
"""Format a partition size."""
# Taken from ubiquity's ubiquity/misc.py
# TODO evand 2009-07-28: Localized size formatting.
if size < 1024:
unit = 'B'
factor = 1
elif size < 1024 * 1024:
unit = 'kB'
factor = 1024
elif size < 1024 * 1024 * 1024:
unit = 'MB'
factor = 1024 * 1024
elif size < 1024 * 1024 * 1024 * 1024:
unit = 'GB'
factor = 1024 * 1024 * 1024
else:
unit = 'TB'
factor = 1024 * 1024 * 1024 * 1024
return '%.1f %s' % (float(size) / factor, unit)
def format_mb_size(size):
if size < 1024:
unit = 'MB'
factor = 1
elif size < 1024 * 1024:
unit = 'GB'
factor = 1024
elif size < 1024 * 1024 * 1024:
unit = 'TB'
factor = 1024 * 1024
return '%.1f %s' % (float(size) / factor, unit)
def fs_size(device):
'''Returns a tuple of the total size of the filesystem
and the free space on it.'''
# FIXME evand 2009-06-05: Do we want the free bytes available to the user,
# or the total free bytes? Right now we're using the latter.
if sys.platform == 'win32':
# Taken from Wubi.
import ctypes
freeuser = ctypes.c_int64()
total = ctypes.c_int64()
free = ctypes.c_int64()
try:
ctypes.windll.kernel32.GetDiskFreeSpaceExW(
unicode(device),
ctypes.byref(freeuser),
ctypes.byref(total),
ctypes.byref(free))
except:
return (0, 0)
return (total.value, free.value)
else:
try:
stat = os.statvfs(device)
except:
return (0, 0)
free = stat.f_bsize * stat.f_bavail # Include reserved blocks.
total = stat.f_bsize * stat.f_blocks
return (total, free)
class USBCreatorProcessException(Exception):
pass
def popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
stdin=subprocess.PIPE):
logging.debug(str(cmd))
if sys.platform == 'win32':
STARTF_USESHOWWINDOW = 1
SW_HIDE = 0
startupinfo = subprocess.STARTUPINFO()
startupinfo.dwFlags |= STARTF_USESHOWWINDOW
startupinfo.wShowWindow = SW_HIDE
else:
startupinfo = None
process = subprocess.Popen(cmd, stdout=stdout, stderr=stderr, stdin=stdin,
startupinfo=startupinfo)
out, err = process.communicate()
if process.returncode is None:
process.wait()
elif process.returncode != 0:
raise USBCreatorProcessException(err)
return out
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