#!/usr/bin/python3 # -*- coding: utf-8; Mode: Python; indent-tabs-mode: nil; tab-width: 4 -*- # Copyright (C) 2005 Javier Carranza and others for Guadalinex # Copyright (C) 2005, 2006, 2007, 2008, 2009 Canonical Ltd. # Copyright (C) 2007 Mario Limonciello # # 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA from __future__ import print_function import errno import os import signal import stat import subprocess import sys import syslog import time import apt_pkg from apt.cache import Cache import debconf sys.path.insert(0, '/usr/lib/ubiquity') from ubiquity import install_misc, misc, osextras class Install(install_misc.InstallBase): def __init__(self): """Initial attributes.""" install_misc.InstallBase.__init__(self) if not os.path.exists('/var/lib/ubiquity'): os.makedirs('/var/lib/ubiquity') with open('/var/lib/ubiquity/started-installing', 'a'): pass self.update_proc = None if os.path.isdir('/rofs'): self.source = '/rofs' elif os.path.isdir('/UNIONFS'): # Klaus Knopper says this may not actually work very well # because it'll copy the WHOLE WORLD (~12GB). self.source = '/UNIONFS' else: self.source = '/var/lib/ubiquity/source' self.db = debconf.Debconf() self.blacklist = {} if 'UBIQUITY_OEM_USER_CONFIG' in os.environ: self.source = None self.target = '/' return assert os.path.ismount(self.target), \ 'Failed to mount the target: %s' % str(self.target) self.select_language_packs(save=True) self.select_ecryptfs() if self.db.get('ubiquity/install/generate-blacklist') == 'true': self.db.progress('START', 0, 100, 'ubiquity/install/title') self.db.progress('INFO', 'ubiquity/install/blacklist') self.generate_blacklist() apt_pkg.init_config() apt_pkg.config.set("Dir", self.target) apt_pkg.config.set("Dir::State::status", self.target_file('var/lib/dpkg/status')) apt_pkg.config.set("APT::GPGV::TrustedKeyring", self.target_file('etc/apt/trusted.gpg')) apt_pkg.config.set("Acquire::gpgv::Options::", "--ignore-time-conflict") apt_pkg.config.set("DPkg::Options::", "--root=%s" % self.target) # We don't want apt-listchanges or dpkg-preconfigure, so just clear # out the list of pre-installation hooks. apt_pkg.config.clear("DPkg::Pre-Install-Pkgs") apt_pkg.init_system() def run(self): """Run the install stage: copy everything to the target system, then configure it as necessary.""" self.start = 0 self.end = 74 self.prev_count = 0 self.count = 1 self.db.progress( 'START', self.start, self.end, 'ubiquity/install/title') self.db.progress('INFO', 'ubiquity/install/mounting_source') if self.source == '/var/lib/ubiquity/source': self.mount_source() if self.target != '/': self.next_region(size=74) # We don't later wait() on this pid by design. There's no # sense waiting for updates to finish downloading when they can # quite easily finish downloading them once inside the new # Ubuntu system. # TODO can we incorporate the bytes copied / bytes total into # the main progress bar? # TODO log to /var/log/installer/debug # TODO make sure KeyboardInterrupt and SystemExit kills this # TODO the install will blow up spectacularly if this is still # holding the apt lock when other apt install tasks run, I # imagine. Have those spin until the lock is released. if self.db.get('ubiquity/download_updates') == 'true': cmd = ['/usr/share/ubiquity/update-apt-cache'] def subprocess_setup(): signal.signal(signal.SIGPIPE, signal.SIG_DFL) os.setpgid(0, 0) self.update_proc = subprocess.Popen( cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, preexec_fn=subprocess_setup) try: self.copy_all() except EnvironmentError as e: if e.errno in (errno.ENOENT, errno.EIO, errno.EFAULT, errno.ENOTDIR, errno.EROFS): if e.filename is None: error_template = 'cd_hd_fault' elif e.filename.startswith(self.target): error_template = 'hd_fault' else: error_template = 'cd_fault' error_template = ('ubiquity/install/copying_error/%s' % error_template) self.db.subst(error_template, 'ERROR', str(e)) self.db.input('critical', error_template) self.db.go() # Exit code 3 signals to the frontend that we have handled # this error. sys.exit(3) elif e.errno == errno.ENOSPC: error_template = 'ubiquity/install/copying_error/no_space' self.db.subst(error_template, 'ERROR', str(e)) self.db.input('critical', error_template) self.db.go() sys.exit(3) else: raise if self.source == '/var/lib/ubiquity/source': self.umount_source() if self.update_proc: for i in range(10): try: os.killpg(self.update_proc.pid, signal.SIGTERM) except OSError as e: if e.errno == errno.ESRCH: break else: raise time.sleep(1) else: try: os.killpg(self.update_proc.pid, signal.SIGKILL) except OSError as e: if e.errno != errno.ESRCH: raise self.update_proc.stdin.close() self.update_proc.stdout.close() syslog.syslog('Terminated ubiquity update process.') def find_cd_kernel(self): """Find the boot kernel on the CD, if possible.""" release_bits = os.uname()[2].split('-') if len(release_bits) >= 3: subarch = release_bits[2] else: subarch = None for prefix in ('vmlinux', 'vmlinuz'): for suffix in ('', '.efi', '.efi.signed'): kernel = os.path.join(self.casper_path, prefix) if os.path.exists(kernel + suffix): return kernel if subarch: kernel = os.path.join(self.casper_path, subarch, prefix) if os.path.exists(kernel + suffix): return kernel kernel = os.path.join(self.casper_path, '%s-%s' % (prefix, subarch)) if os.path.exists(kernel + suffix): return kernel return None def generate_blacklist(self): manifest_remove = os.path.join(self.casper_path, 'filesystem.manifest-remove') manifest_desktop = os.path.join(self.casper_path, 'filesystem.manifest-desktop') manifest = os.path.join(self.casper_path, 'filesystem.manifest') if os.path.exists(manifest_remove) and os.path.exists(manifest): difference = set() with open(manifest_remove) as manifest_file: for line in manifest_file: if line.strip() != '' and not line.startswith('#'): difference.add(line.split()[0]) live_packages = set() with open(manifest) as manifest_file: for line in manifest_file: if line.strip() != '' and not line.startswith('#'): live_packages.add(line.split()[0]) desktop_packages = live_packages - difference elif os.path.exists(manifest_desktop) and os.path.exists(manifest): desktop_packages = set() with open(manifest_desktop) as manifest_file: for line in manifest_file: if line.strip() != '' and not line.startswith('#'): desktop_packages.add(line.split()[0]) live_packages = set() with open(manifest) as manifest_file: for line in manifest_file: if line.strip() != '' and not line.startswith('#'): live_packages.add(line.split()[0]) difference = live_packages - desktop_packages else: difference = set() cache = Cache() use_restricted = True try: if self.db.get('apt-setup/restricted') == 'false': use_restricted = False except debconf.DebconfError: pass if not use_restricted: for pkg in cache.keys(): if (cache[pkg].is_installed and cache[pkg].section.startswith('restricted/')): difference.add(pkg) # Keep packages we explicitly installed. keep = install_misc.query_recorded_installed() arch, subarch = install_misc.archdetect() # Less than ideal. Since we cannot know which bootloader we'll need # at file copy time, we should figure out why grub still fails when # apt-install-direct is present during configure_bootloader (code # removed). if arch in ('amd64', 'i386'): if subarch == 'efi': keep.add('grub-efi') keep.add('grub-efi-amd64') keep.add('grub-efi-amd64-signed') keep.add('shim-signed') try: altmeta = self.db.get( 'base-installer/kernel/altmeta') if altmeta: altmeta = '-%s' % altmeta except debconf.DebconfError: altmeta = '' keep.add('linux-signed-generic%s' % altmeta) else: keep.add('grub') keep.add('grub-pc') elif (arch in ('armel', 'armhf') and subarch in ('omap', 'omap4', 'mx5')): keep.add('flash-kernel') keep.add('u-boot-tools') elif arch == 'powerpc': keep.add('yaboot') keep.add('hfsutils') # Even adding ubiquity as a depends to oem-config-{gtk,kde} doesn't # appear to force ubiquity and libdebian-installer4 to copy all of # their files, so this does the trick. try: if self.db.get('oem-config/enable') == 'true': keep.add('ubiquity') except (debconf.DebconfError, IOError): pass difference -= install_misc.expand_dependencies_simple( cache, keep, difference) # Consider only packages that don't have a prerm, and which can # therefore have their files removed without any preliminary work. difference = { x for x in difference if not os.path.exists('/var/lib/dpkg/info/%s.prerm' % x)} confirmed_remove = set() with cache.actiongroup(): for pkg in sorted(difference): if pkg in confirmed_remove: continue would_remove = install_misc.get_remove_list( cache, [pkg], recursive=True) if would_remove <= difference: confirmed_remove |= would_remove # Leave these marked for removal in the apt cache to # speed up further calculations. else: for removedpkg in would_remove: cachedpkg = install_misc.get_cache_pkg( cache, removedpkg) cachedpkg.mark_keep() difference = confirmed_remove if len(difference) == 0: del cache self.blacklist = {} return cmd = ['dpkg', '-L'] cmd.extend(difference) subp = subprocess.Popen( cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True) res = subp.communicate()[0].splitlines() u = {} for x in res: u[x] = 1 self.blacklist = u def copy_all(self): """Core copy process. This is the most important step of this stage. It clones live filesystem into a local partition in the selected hard disk.""" self.db.progress('START', 0, 100, 'ubiquity/install/title') self.db.progress('INFO', 'ubiquity/install/copying') fs_size = os.path.join(self.casper_path, 'filesystem.size') if os.path.exists(fs_size): with open(fs_size) as total_size_fp: total_size = int(total_size_fp.readline()) else: # Fallback in case an Ubuntu derivative forgets to put # /casper/filesystem.size on the CD, or to account for things # like CD->USB transformation tools that don't copy this file. # This is slower than just reading the size from a file, but # better than crashing. # # Obviously doing os.walk() twice is inefficient, but I'd rather # not suck the list into ubiquity's memory, and I'm guessing # that the kernel's dentry cache will avoid most of the slowness # anyway. total_size = 0 for dirpath, dirnames, filenames in os.walk(self.source): for name in dirnames + filenames: fqpath = os.path.join(dirpath, name) total_size += os.lstat(fqpath).st_size # Progress bar handling: # We sample progress every half-second (assuming time.time() gives # us sufficiently good granularity) and use the average of progress # over the last minute or so to decide how much time remains. We # don't bother displaying any progress for the first ten seconds in # order to allow things to settle down, and we only update the "time # remaining" indicator at most every two seconds after that. copy_progress = 0 copied_size = 0 directory_times = [] time_start = time.time() times = [(time_start, copied_size)] long_enough = False time_last_update = time_start debug = 'UBIQUITY_DEBUG' in os.environ if self.db.get('ubiquity/install/md5_check') == 'false': md5_check = False else: md5_check = True # Increase kernel flush times during bulk data copying to make it # more likely that small files are packed contiguously, which should # speed up initial boot times. dirty_writeback_centisecs = None dirty_expire_centisecs = None if os.path.exists('/proc/sys/vm/dirty_writeback_centisecs'): with open('/proc/sys/vm/dirty_writeback_centisecs') as dwc: dirty_writeback_centisecs = int(dwc.readline()) with open('/proc/sys/vm/dirty_writeback_centisecs', 'w') as dwc: print('3000\n', file=dwc) if os.path.exists('/proc/sys/vm/dirty_expire_centisecs'): with open('/proc/sys/vm/dirty_expire_centisecs') as dec: dirty_expire_centisecs = int(dec.readline()) with open('/proc/sys/vm/dirty_expire_centisecs', 'w') as dec: print('6000\n', file=dec) old_umask = os.umask(0) for dirpath, dirnames, filenames in os.walk(self.source): sp = dirpath[len(self.source) + 1:] for name in dirnames + filenames: relpath = os.path.join(sp, name) # /etc/fstab was legitimately created by partman, and # shouldn't be copied again. Similarly, /etc/crypttab may # have been legitimately created by the user-setup plugin. if relpath in ("etc/fstab", "etc/crypttab"): continue sourcepath = os.path.join(self.source, relpath) targetpath = os.path.join(self.target, relpath) st = os.lstat(sourcepath) # Is the path blacklisted? if (not stat.S_ISDIR(st.st_mode) and '/%s' % relpath in self.blacklist): if debug: syslog.syslog('Not copying %s' % relpath) continue # Remove the target if necessary and if we can. install_misc.remove_target( self.source, self.target, relpath, st) # Now actually copy source to target. mode = stat.S_IMODE(st.st_mode) if stat.S_ISLNK(st.st_mode): linkto = os.readlink(sourcepath) os.symlink(linkto, targetpath) elif stat.S_ISDIR(st.st_mode): if not os.path.isdir(targetpath): try: os.mkdir(targetpath, mode) except OSError as e: # there is a small window where update-apt-cache # can race with us since it creates # "/target/var/cache/apt/...". Hence, ignore # failure if the directory does now exist where # brief moments before it didn't. if e.errno != errno.EEXIST: raise elif stat.S_ISCHR(st.st_mode): os.mknod(targetpath, stat.S_IFCHR | mode, st.st_rdev) elif stat.S_ISBLK(st.st_mode): os.mknod(targetpath, stat.S_IFBLK | mode, st.st_rdev) elif stat.S_ISFIFO(st.st_mode): os.mknod(targetpath, stat.S_IFIFO | mode) elif stat.S_ISSOCK(st.st_mode): os.mknod(targetpath, stat.S_IFSOCK | mode) elif stat.S_ISREG(st.st_mode): install_misc.copy_file( self.db, sourcepath, targetpath, md5_check) # Copy metadata. copied_size += st.st_size os.lchown(targetpath, st.st_uid, st.st_gid) if not stat.S_ISLNK(st.st_mode): os.chmod(targetpath, mode) if stat.S_ISDIR(st.st_mode): directory_times.append( (targetpath, st.st_atime, st.st_mtime)) # os.utime() sets timestamp of target, not link elif not stat.S_ISLNK(st.st_mode): try: os.utime(targetpath, (st.st_atime, st.st_mtime)) except Exception: # We can live with timestamps being wrong. pass if (hasattr(os, "listxattr") and hasattr(os, "supports_follow_symlinks") and os.supports_follow_symlinks): try: attrnames = os.listxattr( sourcepath, follow_symlinks=False) for attrname in attrnames: attrvalue = os.getxattr( sourcepath, attrname, follow_symlinks=False) os.setxattr( targetpath, attrname, attrvalue, follow_symlinks=False) except OSError as e: if e.errno not in ( errno.EPERM, errno.ENOTSUP, errno.ENODATA): raise if int((copied_size * 90) / total_size) != copy_progress: copy_progress = int((copied_size * 90) / total_size) self.db.progress('SET', 10 + copy_progress) time_now = time.time() if (time_now - times[-1][0]) >= 0.5: times.append((time_now, copied_size)) if not long_enough and time_now - times[0][0] >= 10: long_enough = True if long_enough and time_now - time_last_update >= 2: time_last_update = time_now while (time_now - times[0][0] > 60 and time_now - times[1][0] >= 60): times.pop(0) speed = ((times[-1][1] - times[0][1]) / (times[-1][0] - times[0][0])) if speed != 0: time_remaining = ( int((total_size - copied_size) / speed)) if time_remaining < 60: self.db.progress( 'INFO', 'ubiquity/install/copying_minute') # Apply timestamps to all directories now that the items within them # have been copied. for dirtime in directory_times: (directory, atime, mtime) = dirtime try: os.utime(directory, (atime, mtime)) except Exception: # I have no idea why I've been getting lots of bug reports # about this failing, but I really don't care. Ignore it. pass # Revert to previous kernel flush times. if dirty_writeback_centisecs is not None: with open('/proc/sys/vm/dirty_writeback_centisecs', 'w') as dwc: print(dirty_writeback_centisecs, file=dwc) if dirty_expire_centisecs is not None: with open('/proc/sys/vm/dirty_expire_centisecs', 'w') as dec: print(dirty_expire_centisecs, file=dec) # Try some possible locations for the kernel we used to boot. This # lets us save a couple of megabytes of CD space. bootdir = self.target_file('boot') kernel = self.find_cd_kernel() if kernel: prefix = os.path.basename(kernel).split('-', 1)[0] release = os.uname()[2] target_kernel = os.path.join(bootdir, '%s-%s' % (prefix, release)) copies = [] # ISO9660 images may have to use .efi rather than .efi.signed in # order to support being booted using isolinux, which must abide # by archaic 8.3 restrictions. for suffix in (".efi", ".efi.signed"): if os.path.exists(kernel + suffix): signed_kernel = kernel + suffix break else: signed_kernel = None if os.path.exists(kernel): copies.append((kernel, target_kernel)) elif signed_kernel is not None: # No unsigned kernel. We'll construct it using sbsigntool. copies.append((signed_kernel, target_kernel)) if signed_kernel is not None: copies.append((signed_kernel, "%s.efi.signed" % target_kernel)) for source, target in copies: osextras.unlink_force(target) install_misc.copy_file(self.db, source, target, md5_check) os.lchown(target, 0, 0) os.chmod(target, 0o644) st = os.lstat(source) try: os.utime(target, (st.st_atime, st.st_mtime)) except Exception: # We can live with timestamps being wrong. pass if not os.path.exists(kernel) and signed_kernel is not None: # Construct the unsigned kernel. subprocess.check_call(["sbattach", "--remove", target_kernel]) os.umask(old_umask) self.db.progress('SET', 100) self.db.progress('STOP') def mount_one_image(self, fsfile, mountpoint=None): if os.path.splitext(fsfile)[1] == '.cloop': blockdev_prefix = 'cloop' elif os.path.splitext(fsfile)[1] == '.squashfs': blockdev_prefix = 'loop' if blockdev_prefix == '': raise install_misc.InstallStepError( "No source device found for %s" % fsfile) dev = '' sysloops = sorted([x for x in os.listdir('/sys/block') if x.startswith(blockdev_prefix)]) for sysloop in sysloops: try: with open(os.path.join('/sys/block', sysloop, 'size')) as sysloopf: sysloopsize = sysloopf.readline().strip() if sysloopsize == '0': if osextras.find_on_path('udevadm'): udevinfo_cmd = ['udevadm', 'info'] else: udevinfo_cmd = ['udevinfo'] udevinfo_cmd.extend( ['-q', 'name', '-p', os.path.join('/block', sysloop)]) with open('/dev/null') as devnull: udevinfo = subprocess.Popen( udevinfo_cmd, stdout=subprocess.PIPE, stderr=devnull, universal_newlines=True) devbase = udevinfo.communicate()[0] if udevinfo.returncode != 0: devbase = sysloop dev = '/dev/%s' % devbase break except: continue if dev == '': raise install_misc.InstallStepError( "No loop device available for %s" % fsfile) misc.execute('losetup', dev, fsfile) if mountpoint is None: mountpoint = '/var/lib/ubiquity/%s' % sysloop if not os.path.isdir(mountpoint): os.mkdir(mountpoint) if not misc.execute('mount', dev, mountpoint): misc.execute('losetup', '-d', dev) misc.execute('mount', '-o', 'loop', fsfile, mountpoint) dev = 'unused' return (dev, mountpoint) def mount_source(self): """mounting loop system from cloop or squashfs system.""" self.devs = [] self.mountpoints = [] if not os.path.isdir(self.source): syslog.syslog('mkdir %s' % self.source) os.mkdir(self.source) fs_preseed = self.db.get('ubiquity/install/filesystem-images') if fs_preseed == '': # Simple autodetection on unionfs systems with open('/proc/mounts') as mounts: for line in mounts: (device, fstype) = line.split()[1:3] if fstype == 'squashfs' and os.path.exists(device): misc.execute('mount', '--bind', device, self.source) self.mountpoints.append(self.source) return # Manual detection on non-unionfs systems fsfiles = [os.path.join(self.casper_path, 'filesystem.cloop'), os.path.join(self.casper_path, 'filesystem.squashfs'), '/cdrom/META/META.squashfs', '/live/image/live/filesystem.squashfs'] for fsfile in fsfiles: if fsfile != '' and os.path.isfile(fsfile): dev, mountpoint = self.mount_one_image(fsfile, self.source) self.devs.append(dev) self.mountpoints.append(mountpoint) elif len(fs_preseed.split()) == 1: # Just one preseeded image. if not os.path.isfile(fs_preseed): raise install_misc.InstallStepError( "Preseeded filesystem image %s not found" % fs_preseed) dev, mountpoint = self.mount_one_image(fsfile, self.source) self.devs.append(dev) self.mountpoints.append(mountpoint) else: # OK, so we need to mount multiple images and unionfs them # together. for fsfile in fs_preseed.split(): if not os.path.isfile(fsfile): raise install_misc.InstallStepError( "Preseeded filesystem image %s not found" % fsfile) dev, mountpoint = self.mount_one_image(fsfile) self.devs.append(dev) self.mountpoints.append(mountpoint) assert self.devs assert self.mountpoints misc.execute('mount', '-t', 'unionfs', '-o', 'dirs=' + ':'.join(['%s=ro' % x for x in self.mountpoints]), 'unionfs', self.source) self.mountpoints.append(self.source) # TODO need to somehow get this to plugininstall def umount_source(self): """umounting loop system from cloop or squashfs system.""" devs = self.devs devs.reverse() mountpoints = self.mountpoints mountpoints.reverse() for mountpoint in mountpoints: if not misc.execute('umount', mountpoint): raise install_misc.InstallStepError( "Failed to unmount %s" % mountpoint) for dev in devs: if (dev != '' and dev != 'unused' and not misc.execute('losetup', '-d', dev)): raise install_misc.InstallStepError( "Failed to detach loopback device %s" % dev) def select_ecryptfs(self): """Is ecryptfs in use by an existing user? If so, keep it installed. This duplicates code from user-setup, but necessarily so; when user-setup-ask runs in ubiquity, /target is not yet mounted, but we need to make this decision before generating the file copy blacklist so user-setup-apply would be too late.""" home = self.target_file('home') if os.path.isdir(home): for homedir in os.listdir(home): if os.path.isdir(os.path.join(home, homedir, '.ecryptfs')): syslog.syslog('ecryptfs already in use in %s' % os.path.join(home, homedir)) install_misc.record_installed(['ecryptfs-utils']) break if __name__ == '__main__': os.environ['DPKG_UNTRANSLATED_MESSAGES'] = '1' if not os.path.exists('/var/lib/ubiquity'): os.makedirs('/var/lib/ubiquity') osextras.unlink_force('/var/lib/ubiquity/install.trace') install = Install() sys.excepthook = install_misc.excepthook install.run() sys.exit(0) # vim:ai:et:sts=4:tw=80:sw=4: