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# Copyright (c) 2012, Calxeda Inc.
#
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of Calxeda Inc. nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
# TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
# DAMAGE.
""" Image objects used by the cxmanage controller """
import os
import tempfile
from cxmanage import CxmanageError
from cxmanage.simg import create_simg, has_simg, valid_simg, get_simg_contents
class Image:
""" An image consists of an image type, a filename, and any info needed
to build an SIMG out of it. """
def __init__(self, filename, image_type, simg=None,
version=None, daddr=None, skip_crc32=False):
self.filename = filename
self.type = image_type
self.version = version
self.daddr = daddr
self.skip_crc32 = skip_crc32
if not os.path.exists(filename):
raise ValueError("File %s does not exist" % filename)
if simg == None:
contents = open(filename).read()
self.simg = has_simg(contents)
else:
self.simg = simg
if not self.verify():
raise CxmanageError("%s is not a valid %s image" %
(os.path.basename(filename), image_type))
def upload(self, work_dir, tftp, version, daddr):
""" Create and upload an SIMG file """
filename = self.filename
# Create new image if necessary
if not self.simg:
contents = open(filename).read()
# Figure out version and daddr
if self.version != None:
version = self.version
if self.daddr != None:
daddr = self.daddr
# Create simg
align = (self.type in ["CDB", "BOOT_LOG"])
simg = create_simg(contents, version=version, daddr=daddr,
skip_crc32=self.skip_crc32, align=align)
filename = tempfile.mkstemp(".simg", work_dir + "/")[1]
open(filename, "w").write(simg)
# Make sure the simg was built correctly
if not valid_simg(open(filename).read()):
raise CxmanageError("%s is not a valid SIMG" %
os.path.basename(self.filename))
# Upload to tftp
basename = os.path.basename(filename)
tftp.put_file(filename, basename)
return basename
def size(self):
""" Return the full size of this image (as an SIMG) """
if self.simg:
return os.path.getsize(self.filename)
else:
contents = open(self.filename).read()
align = (self.type in ["CDB", "BOOT_LOG"])
simg = create_simg(contents, skip_crc32=True, align=align)
return len(simg)
def verify(self):
""" Return true if the image is valid, false otherwise """
if self.type in ["CDB", "BOOT_LOG"]:
# Look for "CDBH"
contents = open(self.filename).read()
if self.simg:
contents = get_simg_contents(contents)
return contents[:4] == "CDBH"
return True
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