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#!/usr/bin/python
import os
import sys
sys.path.append('/usr/lib/ltsp/python')
import subprocess
import time
import signal
import socket
import struct
import fcntl
import tempfile
def get_config(name):
return os.environ.get(name)
def get_config_bool(name):
val = os.environ.get(name)
if val:
val = val.lower()
else:
return False
if val == 'y' or val == 'yes' or val == 'true':
return True
else:
return False
def get_ip(ifname):
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
return socket.inet_ntoa(fcntl.ioctl(
s.fileno(),
0x8915, # SIOCGIFADDR
struct.pack('256s', ifname[:15])
)[20:24])
class LDM:
def __init__(self, vt, display):
self.vt = vt
self.display = display
self.server = get_config('SERVER')
self.use_xfs = get_config_bool('USE_XFS')
self.use_sound = get_config_bool('SOUND')
self.use_localdev = get_config_bool('LOCALDEV')
if self.use_sound:
self.ip = get_ip('eth0')
self.sound_daemon = get_config('SOUND_DAEMON') or 'esd'
if self.use_xfs:
xfs_server = get_config('XFS_SERVER') or self.server
self.fontpath = "tcp/%s:7100" % xfs_server
# Save xauth info some writable tmpfs file.
self.authfile = tempfile.mktemp()
def run(self):
null = open('/dev/null', 'w')
logfile = open('/var/log/ldm.log', 'a')
os.dup2(null.fileno(), sys.stdin.fileno())
os.dup2(logfile.fileno(), sys.stdout.fileno())
os.dup2(logfile.fileno(), sys.stderr.fileno())
while True:
server_opts = ['-br', '-ac', '-noreset']
if self.use_xfs:
server_opts += ['-fp', self.fontpath]
server_command = ['X', '-auth', self.authfile] + server_opts + [self.vt, self.display]
server = subprocess.Popen(server_command, stdout=sys.stdout, stderr=sys.stderr)
env = os.environ.copy()
env['DISPLAY'] = self.display
env['XAUTHORITY'] = self.authfile
time.sleep(5)
# Generate an X authority key in ~/.Xauthority
xauth_command = ['xauth', '-i', '-n', '-f', self.authfile, 'generate', self.display]
xauth = subprocess.Popen(xauth_command, stdout=sys.stdout, stderr=sys.stderr, env=env)
os.waitpid(xauth.pid, 0)
greeter = subprocess.Popen(['/usr/lib/ltsp/greeters/gtk'],
stdout=subprocess.PIPE, stderr=sys.stderr, env=env)
greeter_output = greeter.stdout.readlines()
if len(greeter_output) == 4:
username = greeter_output[0][:-1]
password = greeter_output[1][:-1]
lang = greeter_output[2][:-1]
selected_session = greeter_output[3][:-1]
self.spawn_session(username, password, lang, selected_session)
else:
print "Didn't get the right output from the greeter"
os.kill(server.pid, signal.SIGTERM)
os.waitpid(server.pid, 0)
def spawn_session(self, username, password, lang, selected_session):
pipe_read, pipe_write = os.pipe()
pid = os.fork()
if pid == 0:
os.close(pipe_write)
sys.stdin.close()
os.setsid()
os.environ['DISPLAY'] = self.display
os.environ['XAUTHORITY'] = self.authfile
os.environ['LDM_ASKPASS_FD'] = str(pipe_read)
os.environ['SSH_ASKPASS'] = '/usr/lib/ltsp/ldm-askpass'
ssh_opts = ['-v',
'-X',
'-c', 'blowfish-cbc,aes128-cbc,3des-cbc']
if self.use_localdev:
localdev_ssh_opts=['-M',
'-S', '/tmp/.ltspfs-socket']
ssh_opts.extend(localdev_ssh_opts)
ssh_auth = ['%s@%s' % (username,self.server)]
if self.use_sound:
if self.sound_daemon == 'esd':
print "info: Enabling esd sound support."
# Could start using esddsp, but it is not enabled
# because it gave problems when using firefox.
# esddsp', '-m','--server=%s:16001' % (self.ip)
espeakerport = 16001
sound_cmd = ['ESPEAKER=%s:%d' % (self.ip, espeakerport)]
# Make sure esd is ready to accept new
# connections/clients. It need to be reset to
# forget the previous users authentication key.
# A native python implementation is probably
# better. [pere 2006-02-24]
os.system("killall -HUP esd")
elif self.sound_daemon == 'nasd':
print "info: Enabling nasd sound support."
# Could use the audiooss package to set LD_PRELOAD.
# Not enabled by default to avoid problems with
# firefox.
sound_cmd = ['AUDIOSERVER=%s:0' % (self.ip)]
else:
print "error: Unsupported sound daemon: '%s'" % \
(self.sound_daemon)
sound_cmd = []
else:
print "info: Not enabling sound support."
sound_cmd = []
# select the right session command
session_manager = get_config('LDM_REMOTECMD') or '/etc/X11/Xsession'
if selected_session != 'None' and not get_config('LDM_REMOTECMD'):
session_manager = session_manager+' '+selected_session
# make sure we clean up after logout if localdev is used
if self.use_localdev:
session_manager = session_manager+' && ltspfsmounter all cleanup'
print "info: Enabling localdev support."
if os.access("/var/run/.static-device", os.F_OK):
print "info: Enabling static localdev support."
static_dev = open("/var/run/.static-device", "r")
delayed_mnt = open("/var/run/.delayed-mount", "a")
delayed_mnt.writelines(static_dev.readlines())
delayed_mnt.close()
static_dev.close()
# set language
if lang != 'None':
lang_command = 'LC_ALL='+lang+' LANGUAGE='+lang+' LANG='+lang
else:
lang_command = ''
# Make sure to run a login shell, to get /etc/profile executed
# and the full PATH content set. Use bash to make sure the
# shell used support the --login argument.
ssh_remote_command = ['/bin/bash',
'--login',
'-c',
" ".join( ['\'',
'env',
lang_command,
'LTSP_CLIENT="%s"' % (socket.gethostname()),
] + sound_cmd + [
session_manager,
'\''] ),
';',
'kill -1 $PPID']
if 'NETWORK_COMPRESSION' in os.environ:
ssh_opts.append('-C')
command = ['ssh'] + ssh_opts + ssh_auth + ssh_remote_command
print "ssh command line:", command
sys.stdout.flush()
os.execvp('ssh', command)
sys.exit(1)
os.close(pipe_read)
os.write(pipe_write,password)
os.close(pipe_write)
os.waitpid(pid, 0)
if len(sys.argv) < 3:
sys.stderr.write('Usage: ldm <vt[1-N]> <:[0-N]>\n')
sys.exit(1)
vt, display = sys.argv[1:]
ldm = LDM(vt, display)
ldm.run()
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