43
51
help='''Apply any package updates in the jail.''')
44
52
parser.add_option("-m", "--mirror",
45
53
action="store", dest="apt_mirror",
46
help="Sets the apt mirror.", default="http://archive.ubuntu.com/ubuntu")
54
help="Sets the apt mirror.", default=conf['jail']['mirror'])
55
parser.add_option("--python-site-packages",
56
action="store", dest="python_site_packages",
57
help="Path to Python site packages directory inside the jail.",
47
59
(options, args) = parser.parse_args(sys.argv)
49
61
if os.geteuid() != 0:
111
129
# Also copy the IVLE lib directory into the jail
112
130
# This is necessary for running certain services
113
ivle_site_packages = os.path.join(ivle.conf.python_site_packages, 'ivle')
114
jail_site_packages = os.path.join(build_path, ivle_site_packages[1:])
132
# ivle_site_packages is the IVLE install location outside the jail
133
ivle_site_packages = os.path.dirname(ivle.__file__)
135
if options.python_site_packages is None:
136
# Get the site packages from the IVLE install location *OUTSIDE* the
137
# jail. Warning! This only works if you have the same Python site
138
# packages directory inside and out (ie. same Python version).
139
# If not, you should use --python-site-packages.
140
jail_site_packages = os.path.join(build_path, ivle_site_packages[1:])
142
# User-specified site packages
143
jail_site_packages = os.path.join(build_path,
144
options.python_site_packages[1:], "ivle")
115
145
if os.path.exists(jail_site_packages):
116
146
shutil.rmtree(jail_site_packages)
117
147
shutil.copytree(ivle_site_packages, jail_site_packages)
119
# IMPORTANT: ivle/conf/conf.py contains details which could compromise security
120
# if left in the jail (such as the DB password). We delete it now! It would be
121
# shadowed by the per-user conf.py anyway, but it's best to be safe.
122
os.unlink(os.path.join(jail_site_packages, 'conf/conf.py'))
123
# XXX: Shouldn't copy the compiled files at all, but compile them in the jail!
124
os.unlink(os.path.join(jail_site_packages, 'conf/conf.pyc'))
149
# And finally copy in /etc/hosts, /etc/resolv.conf and /etc/hostname,
150
# so name resolution is less unlikely to work.
152
'/etc/resolv.conf', os.path.join(build_path, 'etc/resolv.conf'))
153
shutil.copy('/etc/hosts', os.path.join(build_path, 'etc/hosts'))
154
shutil.copy('/etc/hostname', os.path.join(build_path, 'etc/hostname'))
156
# Make /tmp and /var/lock un-world-writable. /tmp will be mounted over,
157
# and /var/{lock,tmp} should die.
158
for path in ('tmp', 'var/lock', 'var/tmp'):
159
path = os.path.join(build_path, path)
160
os.chmod(path, os.stat(path).st_mode & ~stat.S_IWOTH)
162
# Verify that nothing in the jail is world-writable.
163
# We don't want students to write into places that others can see.
165
for path, dirs, files in os.walk(build_path):
167
d = os.path.join(path, dname)
168
if os.path.islink(d):
170
if os.stat(d).st_mode & stat.S_IWOTH:
174
f = os.path.join(path, fname)
175
if os.path.islink(f):
177
if os.stat(f).st_mode & stat.S_IWOTH:
178
if (os.path.dirname(f) == os.path.join(build_path, 'dev') and
179
os.path.basename(f) in ('ptmx', 'null', 'tty', 'full', 'zero',
184
except UnsafeJail, e:
185
print >> sys.stderr,"""Error: Jail contains world writable path: '%s'.
186
This is a security vulnerability as jail template contents are shared between
187
users. Please either make this path world unwriteable or remove it from the
191
# Copy jail template build to actual jail template
192
template_path = conf['paths']['jails']['template']
126
193
if os.spawnvp(os.P_WAIT, 'rsync', ['rsync', '-a', '--delete',
127
build_path + '/', ivle.conf.jail_system]) != 0:
194
build_path + '/', template_path]) != 0:
128
195
print >> sys.stderr, "Jail copying failed."
198
# Now mangle things a bit, so we can bind-mount the user bits in.
199
# /etc/passwd and /etc/ivle/ivle.conf need to be symlinks to somewhere in /home
201
os.rename(os.path.join(template_path, 'etc/passwd'),
202
os.path.join(template_path, 'home/.passwd')
204
os.symlink('../home/.passwd', os.path.join(template_path, 'etc/passwd'))
206
os.makedirs(os.path.join(template_path, "etc/ivle"))
207
os.symlink('../../home/.ivle.conf',
208
os.path.join(template_path, "etc/ivle/ivle.conf"))