/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeAptCdrom.py is in python3-distupgrade 1:0.220.10.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 | # DistUpgradeAptCdrom.py
#
# Copyright (c) 2008 Canonical
#
# Author: Michael Vogt <michael.vogt@ubuntu.com>
#
# 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; either version 2 of the
# License, or (at your option) any later version.
#
# 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 re
import os
import apt
import apt_pkg
import logging
import gzip
import shutil
import subprocess
import sys
from gettext import gettext as _
class AptCdromError(Exception):
" base exception for apt cdrom errors "
pass
class AptCdrom(object):
" represents a apt cdrom object "
def __init__(self, view, path):
self.view = view
self.cdrompath = path
# the directories we found on disk with signatures, packages and i18n
self.packages = set()
self.signatures = set()
self.i18n = set()
def restore_backup(self, backup_ext):
" restore the backup copy of the cdroms.list file (*not* sources.list)! "
cdromstate = os.path.join(apt_pkg.config.find_dir("Dir::State"),
apt_pkg.config.find("Dir::State::cdroms"))
if os.path.exists(cdromstate+backup_ext):
shutil.copy(cdromstate+backup_ext, cdromstate)
# mvo: we don't have to care about restoring the sources.list here because
# aptsources will do this for us anyway
def comment_out_cdrom_entry(self):
""" comment out the cdrom entry """
diskname = self._readDiskName()
pentry = self._generateSourcesListLine(diskname, self.packages)
sourceslist=apt_pkg.config.find_file("Dir::Etc::sourcelist")
content = open(sourceslist).read()
content = content.replace(pentry, "# %s" % pentry)
open(sourceslist, "w").write(content)
def _scanCD(self):
"""
scan the CD for interessting files and return them as:
(packagesfiles, signaturefiles, i18nfiles)
"""
packages = set()
signatures = set()
i18n = set()
for root, dirs, files in os.walk(self.cdrompath, topdown=True):
if (root.endswith("debian-installer") or
root.endswith("dist-upgrader")):
del dirs[:]
continue
elif ".aptignr" in files:
continue
elif "Packages" in files:
packages.add(os.path.join(root,"Packages"))
elif "Packages.gz" in files:
packages.add(os.path.join(root,"Packages.gz"))
elif "Sources" in files or "Sources.gz" in files:
logging.error("Sources entry found in %s but not supported" % root)
elif "Release.gpg" in files:
signatures.add(os.path.join(root,"Release.gpg"))
elif "i18n" in dirs:
for f in os.listdir(os.path.join(root,"i18n")):
i18n.add(os.path.join(root,"i18n",f))
# there is nothing under pool but deb packages (no
# indexfiles, so we skip that here
elif os.path.split(root)[1] == ("pool"):
del dirs[:]
return (packages, signatures, i18n)
def _writeDatabase(self):
" update apts cdrom.list "
dbfile = apt_pkg.config.find_file("Dir::State::cdroms")
cdrom = apt_pkg.Cdrom()
id=cdrom.ident(apt.progress.base.CdromProgress())
label = self._readDiskName()
out=open(dbfile,"a")
out.write('CD::%s "%s";\n' % (id, label))
out.write('CD::%s::Label "%s";\n' % (id, label))
def _dropArch(self, packages):
" drop architectures that are not ours "
# create a copy
packages = set(packages)
# now go over the packagesdirs and drop stuff that is not
# our binary-$arch
arch = apt_pkg.config.find("APT::Architecture")
for d in set(packages):
if "/binary-" in d and not arch in d:
packages.remove(d)
return packages
def _readDiskName(self):
# default to cdrompath if there is no name
diskname = self.cdrompath
info = os.path.join(self.cdrompath, ".disk","info")
if os.path.exists(info):
diskname = open(info).read()
for special in ('"',']','[','_'):
diskname = diskname.replace(special,'_')
return diskname
def _generateSourcesListLine(self, diskname, packages):
# see apts indexcopy.cc:364 for details
path = ""
dist = ""
comps = []
for d in packages:
# match(1) is the path, match(2) the dist
# and match(3) the components
m = re.match("(.*)/dists/([^/]*)/(.*)/binary-*", d)
if not m:
raise AptCdromError(_("Could not calculate sources.list entry"))
path = m.group(1)
dist = m.group(2)
comps.append(m.group(3))
if not path or not comps:
return None
comps.sort()
pentry = "deb cdrom:[%s]/ %s %s" % (diskname, dist, " ".join(comps))
return pentry
def _copyTranslations(self, translations, targetdir=None):
if not targetdir:
targetdir=apt_pkg.config.find_dir("Dir::State::lists")
diskname = self._readDiskName()
for f in translations:
fname = apt_pkg.uri_to_filename("cdrom:[%s]/%s" % (diskname,f[f.find("dists"):]))
outf = os.path.join(targetdir,os.path.splitext(fname)[0])
if f.endswith(".gz"):
g=gzip.open(f)
try:
with open(outf, "wb") as out:
# uncompress in 64k chunks
while True:
s=g.read(64000)
out.write(s)
if s == b"":
break
finally:
g.close()
else:
shutil.copy(f,outf)
return True
def _copyPackages(self, packages, targetdir=None):
if not targetdir:
targetdir=apt_pkg.config.find_dir("Dir::State::lists")
# CopyPackages()
diskname = self._readDiskName()
for f in packages:
fname = apt_pkg.uri_to_filename("cdrom:[%s]/%s" % (diskname,f[f.find("dists"):]))
outf = os.path.join(targetdir,os.path.splitext(fname)[0])
if f.endswith(".gz"):
g=gzip.open(f)
try:
with open(outf, "wb") as out:
# uncompress in 64k chunks
while True:
s=g.read(64000)
out.write(s)
if s == b"":
break
finally:
g.close()
else:
shutil.copy(f,outf)
return True
def _verifyRelease(self, signatures):
" verify the signatues and hashes "
gpgv = apt_pkg.config.find("Dir::Bin::gpg","/usr/bin/gpgv")
keyring = apt_pkg.config.find("Apt::GPGV::TrustedKeyring",
"/etc/apt/trusted.gpg")
for sig in signatures:
basepath = os.path.split(sig)[0]
# do gpg checking
releasef = os.path.splitext(sig)[0]
cmd = [gpgv,"--keyring",keyring,
"--ignore-time-conflict",
sig, releasef]
ret = subprocess.call(cmd)
if not (ret == 0):
return False
# now do the hash sum checks
t=apt_pkg.TagFile(open(releasef))
t.step()
for entry in t.section["SHA256"].split("\n"):
(hash,size,name) = entry.split()
f=os.path.join(basepath,name)
if not os.path.exists(f):
logging.info("ignoring missing '%s'" % f)
continue
sum = apt_pkg.sha256sum(open(f))
if not (sum == hash):
logging.error("hash sum mismatch expected %s but got %s" % (hash, sum))
return False
return True
def _copyRelease(self, signatures, targetdir=None):
" copy the release file "
if not targetdir:
targetdir=apt_pkg.config.find_dir("Dir::State::lists")
diskname = self._readDiskName()
for sig in signatures:
releasef = os.path.splitext(sig)[0]
# copy both Release and Release.gpg
for f in (sig, releasef):
fname = apt_pkg.uri_to_filename("cdrom:[%s]/%s" % (diskname,f[f.find("dists"):]))
shutil.copy(f,os.path.join(targetdir,fname))
return True
def _doAdd(self):
" reimplement pkgCdrom::Add() in python "
# os.walk() will not follow symlinks so we don't need
# pkgCdrom::Score() and not dropRepeats() that deal with
# killing the links
(self.packages, self.signatures, self.i18n) = self._scanCD()
self.packages = self._dropArch(self.packages)
if len(self.packages) == 0:
logging.error("no useable indexes found on CD, wrong ARCH?")
raise AptCdromError(_("Unable to locate any package files, perhaps this is not a Ubuntu Disc or the wrong architecture?"))
# CopyAndVerify
if self._verifyRelease(self.signatures):
self._copyRelease(self.signatures)
# copy the packages and translations
self._copyPackages(self.packages)
self._copyTranslations(self.i18n)
# add CD to cdroms.list "database" and update sources.list
diskname = self._readDiskName()
if not diskname:
logging.error("no .disk/ directory found")
return False
debline = self._generateSourcesListLine(diskname, self.packages)
# prepend to the sources.list
sourceslist=apt_pkg.config.find_file("Dir::Etc::sourcelist")
content=open(sourceslist).read()
open(sourceslist,"w").write("# added by the release upgrader\n%s\n%s" % (debline,content))
self._writeDatabase()
return True
def add(self, backup_ext=None):
" add a cdrom to apt's database "
logging.debug("AptCdrom.add() called with '%s'", self.cdrompath)
# do backup (if needed) of the cdroms.list file
if backup_ext:
cdromstate = os.path.join(apt_pkg.config.find_dir("Dir::State"),
apt_pkg.config.find("Dir::State::cdroms"))
if os.path.exists(cdromstate):
shutil.copy(cdromstate, cdromstate+backup_ext)
# do the actual work
apt_pkg.config.set("Acquire::cdrom::mount",self.cdrompath)
apt_pkg.config.set("APT::CDROM::NoMount","true")
# FIXME: add cdrom progress here for the view
#progress = self.view.getCdromProgress()
try:
res = self._doAdd()
except (SystemError, AptCdromError) as e:
logging.error("can't add cdrom: %s" % e)
self.view.error(_("Failed to add the CD"),
_("There was a error adding the CD, the "
"upgrade will abort. Please report this as "
"a bug if this is a valid Ubuntu CD.\n\n"
"The error message was:\n'%s'") % e)
return False
logging.debug("AptCdrom.add() returned: %s" % res)
return res
def __bool__(self):
""" helper to use this as 'if cdrom:' """
return self.cdrompath is not None
if sys.version < '3':
__nonzero__ = __bool__
|