| JoeyArnold |
09-29-2011 02:12 AM |
When typing in the cat /usr/lib/ubiquity/bin/ubiquity
Code:
cat /usr/lib/ubiquity/bin/ubiquity
The following is probably more than two pages:
So you can skip it if you want then:
Code:
if 'UBIQUITY_CTTY' not in os.environ:
os.environ['UBIQUITY_CTTY'] = '1'
import termios
try:
os.setsid()
except OSError:
pass
ttyn = os.ttyname(0)
tty = os.open(ttyn, os.O_RDWR | os.O_NONBLOCK)
flags = fcntl.fcntl(tty, fcntl.F_GETFL)
fcntl.fcntl(tty, fcntl.F_SETFL, flags)
# Leave stderr alone in the following; it's already redirected to
# our log file.
for i in range(tty):
if i != 2:
os.close(i)
for i in range(2):
if tty != i:
os.dup2(tty, i)
if tty >= 3:
os.close(tty)
fcntl.ioctl(0, termios.TIOCSCTTY, 1)
if 'UBIQUITY_BTERM' not in os.environ:
os.environ['UBIQUITY_BTERM'] = '1'
framebuffer = False
dccomm = subprocess.Popen(['debconf-communicate',
'-fnoninteractive', 'ubiquity'],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE, close_fds=True)
try:
dc = debconf.Debconf(read=dccomm.stdout, write=dccomm.stdin)
try:
if dc.get('debian-installer/framebuffer') == 'true':
framebuffer = True
except debconf.DebconfError:
pass
finally:
dccomm.stdin.close()
dccomm.wait()
if framebuffer:
def fb_has(substring):
try:
fb = open('/proc/fb')
except IOError:
return False
try:
for line in fb:
if substring in line:
return True
finally:
fb.close()
return False
got_fb = False
if fb_has('VESA'):
got_fb = True
devnull = open('/dev/null', 'w')
if not got_fb:
subprocess.call(['modprobe', '-q', 'vesafb'],
stdout=devnull, stderr=devnull)
if fb_has(''):
got_fb = True
if not got_fb:
subprocess.call(['modprobe', '-q', 'vga16fb'],
stdout=devnull, stderr=devnull)
if fb_has(''):
got_fb = True
if got_fb:
if not os.path.isdir('/sys/class/graphics/fbcon'):
subprocess.call(['modprobe', '-q', 'fbcon'],
stdout=devnull, stderr=devnull)
# TODO: import debian-installer-utils and use update-dev?
subprocess.call(['udevadm', 'settle'])
devnull.close()
if os.path.exists('/dev/fb0'):
bterm_args = ['bterm',
'-f', '/usr/share/ubiquity/unifont.bgf', '--']
bterm_args.extend(sys.argv)
os.execvp('bterm', bterm_args)
def start_debconf():
"""debconf_ui needs to run within a debconf frontend."""
if 'DEBIAN_HAS_FRONTEND' in os.environ:
# debconf already started, so just clean up the configuration file
# if any (debconf has already read it by now).
if 'DEBCONF_SYSTEMRC' in os.environ:
osextras.unlink_force(os.environ['DEBCONF_SYSTEMRC'])
return
print >>sys.stderr, "debconf_ui selected; starting debconf frontend"
if 'DEBCONF_USE_CDEBCONF' not in os.environ:
# This is rather unsatisfactory. Perhaps it would be better to
# have a custom debconf program, a bit like dpkg-reconfigure.
import tempfile
debconfrc_fd, debconfrc = tempfile.mkstemp()
os.chmod(debconfrc, 0644)
debconfrc_file = os.fdopen(debconfrc_fd, 'w')
orig_debconfrc = open('/etc/debconf.conf')
state = 0
for line in orig_debconfrc:
if (state == 0 and
line.rstrip('\n') and not line.startswith('#')):
state = 1
elif state == 1 and not line.rstrip('\n'):
print >>debconfrc_file, 'Reshow: true'
state = 2
print >>debconfrc_file, line,
orig_debconfrc.close()
debconfrc_file.close()
os.environ['DEBCONF_SYSTEMRC'] = debconfrc
os.environ['DEBCONF_PACKAGE'] = 'ubiquity'
else:
os.environ['DEBCONF_SHOWOLD'] = 'true'
# TODO: need to set owner somehow
import debconf
debconf.runFrontEnd() # re-execs this program
def install(frontend=None, query=False):
'''install(frontend=None) -> none
Get the type of frontend to use and load the module for that.
If frontend is None, defaults to the first of
gtk_ui, kde_ui, and debconf_ui that exists.
'''
if frontend is None:
frontends = ['gtk_ui', 'kde_ui', 'debconf_ui']
else:
frontends = [frontend]
chosen = None
mod = __import__('ubiquity.frontend', globals(), locals(), frontends)
for f in frontends:
if hasattr(mod, f):
chosen = f
ui = getattr(mod, f)
# Noninteractive implies automatic mode.
if f == 'noninteractive':
os.environ['UBIQUITY_AUTOMATIC'] = '1'
# Migration Assistant does not support KDE.
if f == 'kde_ui':
if 'UBIQUITY_MIGRATION_ASSISTANT' in os.environ:
del os.environ['UBIQUITY_MIGRATION_ASSISTANT']
break
else:
raise AttributeError('No frontend available; tried %s' %
', '.join(frontends))
os.environ['UBIQUITY_FRONTEND'] = chosen
if query:
print >> sys.__stdout__, os.environ['UBIQUITY_FRONTEND']
sys.exit(0)
unmount_target()
distro = distribution().lower()
wizard = ui.Wizard(distro)
if os.environ['UBIQUITY_FRONTEND'] == 'debconf_ui':
open_terminal()
start_debconf()
ret = wizard.run()
wizard.stop_debconf()
if ret != 10 and 'UBIQUITY_GREETER' in os.environ:
import traceback
try:
apply_keyboard()
except:
traceback.print_exc()
copy_debconf()
unmount_target()
if ret == 10:
wizard.do_reboot()
if ret == 11:
wizard.do_shutdown()
@misc.raise_privileges
def apply_keyboard():
'''Set the keyboard layout to the default layout for the language selected.
If a user wants a different layout, they can be reasonably expected to
change it in System -> Preferences -> Keyboard.'''
# Mostly taken from ubi-console-setup.
# We need to get rid of /etc/default/keyboard, or keyboard-configuration
# will think it's already configured and behave differently. Try to save
# the old file for interest's sake, but it's not a big deal if we can't.
osextras.unlink_force('/etc/default/keyboard.pre-ubiquity')
try:
os.rename('/etc/default/keyboard',
'/etc/default/keyboard.pre-ubiquity')
except OSError:
osextras.unlink_force('/etc/default/keyboard')
import debconf
dccomm = subprocess.Popen(['debconf-communicate',
'-fnoninteractive', 'ubiquity'],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE, close_fds=True)
try:
dc = debconf.Debconf(read=dccomm.stdout, write=dccomm.stdin)
try:
# Make sure debconf doesn't do anything with crazy "preseeded"
# answers to these questions. If you want to preseed these, use the
# *code variants.
dc.fset('keyboard-configuration/layout', 'seen', 'false')
dc.fset('keyboard-configuration/variant', 'seen', 'false')
dc.fset('keyboard-configuration/model', 'seen', 'false')
dc.fset('console-setup/codeset47', 'seen', 'false')
except debconf.DebconfError:
return
finally:
dccomm.stdin.close()
dccomm.wait()
# Accept all the defaults, given the preseeded language.
child_env = dict(os.environ)
child_env['OVERRIDE_ALLOW_PRESEEDING'] = '1'
subprocess.call(['dpkg-reconfigure', '-fnoninteractive',
'keyboard-configuration'],
env=child_env)
misc.execute('setupcon', '--save-only')
# Reprocess /lib/udev/rules.d/64-xorg-xkb.rules
misc.execute('udevadm', 'trigger', '--subsystem-match=input',
'--action=change')
misc.execute('udevadm', 'settle')
def copy_debconf():
"""Copy a few important questions into the installed system."""
if not TARGET:
return
targetdb = TARGET + '/var/cache/debconf/config.dat'
patterns = ['^oem-config/']
oem = False
import debconf
dccomm = subprocess.Popen(['debconf-communicate',
'-fnoninteractive', 'ubiquity'],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE, close_fds=True)
try:
dc = debconf.Debconf(read=dccomm.stdout, write=dccomm.stdin)
try:
if dc.get('oem-config/enable') == 'true':
oem = True
except debconf.DebconfError:
pass
finally:
dccomm.stdin.close()
dccomm.wait()
if not oem:
patterns.append('^keyboard-configuration/')
patterns.append('^console-setup/')
for q in patterns:
misc.execute_root('debconf-copydb', 'configdb', 'targetdb', '-p', q,
'--config=Name:targetdb', '--config=Driver:File',
'--config=Mode:0644', '--config=Filename:%s' % targetdb)
def unmount_target():
if not TARGET:
return
paths = []
mounts = open('/proc/mounts')
for line in mounts:
path = line.split(' ')[1]
if path == TARGET or path.startswith(TARGET + '/'):
paths.append(path)
mounts.close()
paths.sort()
paths.reverse()
for path in paths:
misc.execute_root('umount', path)
def prepend_path(directory):
if 'PATH' in os.environ and os.environ['PATH'] != '':
os.environ['PATH'] = '%s:%s' % (directory, os.environ['PATH'])
else:
os.environ['PATH'] = directory
def release_lock():
global lock
osextras.unlink_force(LOCKFILE)
if lock is not None:
lock.close()
lock = None
def acquire_lock():
global lock
lock = open(LOCKFILE, 'w')
try:
fcntl.flock(lock, fcntl.LOCK_EX | fcntl.LOCK_NB)
except IOError, e:
if e.errno in (errno.EACCES, errno.EAGAIN, errno.EWOULDBLOCK):
print "Ubiquity is already running!"
sys.exit(1)
raise
atexit.register(release_lock)
fcntl.fcntl(lock, fcntl.F_SETFD, fcntl.FD_CLOEXEC)
print >>lock, os.getpid()
lock.flush()
os.fsync(lock.fileno())
if 'DEBIAN_HAS_FRONTEND' not in os.environ:
# Do a quick check to see if the debconf database is locked by
# something else.
test_debconf = subprocess.Popen(
['debconf-communicate', '-fnoninteractive', 'ubiquity'],
stdin=subprocess.PIPE, stdout=subprocess.PIPE, close_fds=True)
try:
print >>test_debconf.stdin, 'VERSION 2.0'
test_debconf.stdout.readline()
except IOError:
pass
test_debconf.stdin.close()
if test_debconf.wait() != 0:
print "Debconf database is locked!"
print "This may be because a package management program is running."
sys.exit(1)
def run_oem_hooks():
"""Run hook scripts from /usr/lib/oem-config/post-install."""
hookdir = '/usr/lib/oem-config/post-install'
if os.path.isdir(hookdir):
# Exclude hooks containing '.', so that *.dpkg-* et al are avoided.
hooks = filter(lambda entry: '.' not in entry, os.listdir(hookdir))
child_env = dict(os.environ)
child_env['DEBIAN_FRONTEND'] = 'noninteractive'
if 'DEBIAN_HAS_FRONTEND' in child_env:
del child_env['DEBIAN_HAS_FRONTEND']
for hookentry in hooks:
hook = os.path.join(hookdir, hookentry)
if os.access(hook, os.X_OK):
# Errors are ignored at present, although this may change.
subprocess.call([hook], env=child_env)
def main(oem_config):
usage = '%prog [options] [frontend]'
parser = optparse.OptionParser(usage=usage, version=VERSION)
parser.set_defaults(
debug=('UBIQUITY_DEBUG' in os.environ),
debug_pdb=False,
cdebconf=False,
automatic=False,
query=False,
migration_assistant=(not oem_config))
parser.add_option('-d', '--debug', dest='debug', action='store_true',
help='debug mode (warning: passwords will be logged!)')
parser.add_option('--pdb', dest='debug_pdb', action='store_true',
help='drop into Python debugger on a crash')
parser.add_option('--cdebconf', dest='cdebconf', action='store_true',
help='use cdebconf instead of debconf (experimental)')
if not oem_config:
parser.add_option('--no-migration-assistant', dest='migration_assistant',
action='store_false',
help='disable Migration Assistant')
parser.add_option('--automatic', dest='automatic', action='store_true',
help='do not ignore the "seen" flag (useful for ' \
'unattended installations).')
parser.add_option('--only', dest='only', action='store_true',
help='tell the application that it is the only desktop ' \
'program running so that it can customize its UI to ' \
'better suit a minimal environment.')
parser.add_option('-q', '--query', dest='query', action='store_true',
help='find out which frontend will be used by default')
parser.add_option('-g', '--greeter', dest='greeter', action='store_true',
help='allow the user to leave the installer and enter ' \
'a live desktop (for the initial boot).')
parser.add_option('-b', '--no-bootloader', dest='bootloader',
action='store_true',
help='Do not install a bootloader.')
(options, args) = parser.parse_args()
if options.debug:
os.environ['UBIQUITY_DEBUG'] = '1'
if options.debug_pdb:
os.environ['UBIQUITY_DEBUG_PDB'] = '1'
if options.cdebconf:
# Note that this needs to be set before DebconfCommunicate is
# imported by anything.
os.environ['DEBCONF_USE_CDEBCONF'] = '1'
prepend_path('/usr/lib/cdebconf')
prepend_path('/usr/lib/ubiquity/compat')
if options.automatic:
os.environ['UBIQUITY_AUTOMATIC'] = '1'
if options.migration_assistant:
os.environ['UBIQUITY_MIGRATION_ASSISTANT'] = '1'
if options.greeter:
os.environ['UBIQUITY_GREETER'] = '1'
if options.only:
os.environ['UBIQUITY_ONLY'] = '1'
if options.bootloader:
os.environ['UBIQUITY_NO_BOOTLOADER'] = '1'
if oem_config:
os.environ['UBIQUITY_OEM_USER_CONFIG'] = '1'
global TARGET
TARGET = ''
acquire_lock()
try:
os.makedirs('/var/log/installer')
except OSError, e:
# be happy if someone already created the path
if e.errno != errno.EEXIST:
raise
syslog.openlog('ubiquity', syslog.LOG_NOWAIT | syslog.LOG_PID)
if oem_config:
syslog.syslog("Ubiquity %s (oem-config)" % VERSION)
else:
syslog.syslog("Ubiquity %s" % VERSION)
version_file = open('/var/log/installer/version', 'w')
print >>version_file, 'ubiquity %s' % VERSION
version_file.close()
if 'UBIQUITY_DEBUG' in os.environ:
if 'UBIQUITY_DEBUG_CORE' not in os.environ:
os.environ['UBIQUITY_DEBUG_CORE'] = '1'
if 'DEBCONF_DEBUG' not in os.environ:
os.environ['DEBCONF_DEBUG'] = 'developer'
# The frontend should take care of displaying a helpful message if
# we are being run without root privileges.
if not (options.query and args and args[0] == 'noninteractive'):
try:
if oem_config:
logfile = '/var/log/oem-config.log'
else:
logfile = '/var/log/installer/debug'
log = os.open(logfile, os.O_WRONLY | os.O_CREAT | os.O_APPEND,
0644)
os.dup2(log, 2)
os.close(log)
sys.stderr = os.fdopen(2, 'a', 1)
if oem_config:
print >>sys.stderr, "Ubiquity %s (oem-config)" % VERSION
else:
print >>sys.stderr, "Ubiquity %s" % VERSION
except (IOError, OSError), err:
if err.errno != errno.EACCES:
raise
# Default to enabling internal (non-debconf) debugging except for when
# using --automatic.
if 'UBIQUITY_DEBUG_CORE' not in os.environ:
if options.automatic:
os.environ['UBIQUITY_DEBUG_CORE'] = '1'
# Initialise cdebconf if necessary, to work around
# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=451130.
if options.cdebconf:
for package in ('ubiquity', 'keyboard-configuration', 'console-setup'):
subprocess.call(['debconf-loadtemplate', package,
'/var/lib/dpkg/info/%s.templates' % package])
# Clean up old state.
for name in ('apt-installed', 'apt-install-direct', 'remove-kernels', 'apt-removed'):
osextras.unlink_force(os.path.join('/var/lib/ubiquity', name))
shutil.rmtree("/var/lib/partman", ignore_errors=True)
misc.remove_os_prober_cache()
if oem_config and not options.query:
disable_autologin()
if args:
install(args[0], query=options.query)
else:
install(query=options.query)
if oem_config:
run_oem_hooks()
im_switch.kill_im()
if __name__ == '__main__':
# Are we running as ubiquity or oem-config?
oem_config = False
script_name = os.path.basename(sys.argv[0])
if script_name == 'oem-config':
oem_config = True
main(oem_config)
# vim:ai:et:sts=4:tw=80:sw=4:
o@o-HP-Compaq-6910p-GH715AW-ABA:~$
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