83
64
ivle.jailbuilder.debian.debootstrap_create_jail(conf['jail']['suite'],
84
65
build_path, mirror=options.apt_mirror)
86
ivle.jailbuilder.debian.apt_update_cache(build_path)
87
# Minimal required packages
88
ivle.jailbuilder.debian.apt_install(build_path,
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['python2.5', 'python-cjson', 'python-svn', 'python-configobj'])
91
ivle.jailbuilder.debian.apt_clean(build_path)
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# Run apt-get update, apt-get upgrade and apt-get clean.
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ivle.jailbuilder.debian.mangle_sources_list(build_path, clobber=True)
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ivle.jailbuilder.debian.mangle_sources_list(build_path, lines=[
97
'deb %s %s%s %s' % (options.apt_mirror, conf['jail']['suite'],
98
pocket, ' '.join(['main', 'universe']))
99
for pocket in ('', '-updates', '-security')])
101
67
# Add any extra site apt sources.
102
68
if conf['jail']['extra_sources']:
103
69
ivle.jailbuilder.debian.mangle_sources_list(build_path,
119
86
ivle.jailbuilder.debian.apt_clean(build_path)
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# Configure locales to allow en_US.UTF-8 (which IVLE uses)
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ivle.jailbuilder.debian._execute_in_chroot(build_path,
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['locale-gen', 'en_US.UTF-8'])
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# Run apt-get update, apt-get upgrade and apt-get clean.
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ivle.jailbuilder.debian.apt_update_cache(build_path)
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ivle.jailbuilder.debian.apt_upgrade(build_path)
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ivle.jailbuilder.debian.apt_clean(build_path)
125
94
if conf['jail']['devmode']:
126
95
# Copy all console and operating system files into the jail
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services_path = os.path.join(conf['paths']['share'], 'services')
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services_path = os.path.join(ivle.conf.share_path, 'services')
128
97
jail_services_path = os.path.join(build_path, services_path[1:])
129
98
if os.path.exists(jail_services_path):
130
99
shutil.rmtree(jail_services_path)
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102
# Also copy the IVLE lib directory into the jail
134
103
# This is necessary for running certain services
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# ivle_site_packages is the IVLE install location outside the jail
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ivle_site_packages = os.path.dirname(ivle.__file__)
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if options.python_site_packages is None:
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# Get the site packages from the IVLE install location *OUTSIDE* the
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# jail. Warning! This only works if you have the same Python site
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# packages directory inside and out (ie. same Python version).
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# If not, you should use --python-site-packages.
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jail_site_packages = os.path.join(build_path, ivle_site_packages[1:])
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# User-specified site packages
147
jail_site_packages = os.path.join(build_path,
148
options.python_site_packages[1:], "ivle")
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ivle_site_packages = os.path.join(ivle.conf.python_site_packages, 'ivle')
105
jail_site_packages = os.path.join(build_path, ivle_site_packages[1:])
149
106
if os.path.exists(jail_site_packages):
150
107
shutil.rmtree(jail_site_packages)
151
108
shutil.copytree(ivle_site_packages, jail_site_packages)
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# And finally copy in /etc/hosts, /etc/resolv.conf and /etc/hostname,
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# so name resolution is less unlikely to work.
156
'/etc/resolv.conf', os.path.join(build_path, 'etc/resolv.conf'))
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shutil.copy('/etc/hosts', os.path.join(build_path, 'etc/hosts'))
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shutil.copy('/etc/hostname', os.path.join(build_path, 'etc/hostname'))
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# Make /tmp and /var/lock un-world-writable. /tmp will be mounted over,
161
# and /var/{lock,tmp} should die.
162
for path in ('tmp', 'var/lock', 'var/tmp'):
163
path = os.path.join(build_path, path)
164
os.chmod(path, os.stat(path).st_mode & ~stat.S_IWOTH)
166
# Verify that nothing in the jail is world-writable.
167
# We don't want students to write into places that others can see.
169
for path, dirs, files in os.walk(build_path):
171
d = os.path.join(path, dname)
172
if os.path.islink(d):
174
if os.stat(d).st_mode & stat.S_IWOTH:
178
f = os.path.join(path, fname)
179
if os.path.islink(f):
181
if os.stat(f).st_mode & stat.S_IWOTH:
182
if (os.path.dirname(f) == os.path.join(build_path, 'dev') and
183
os.path.basename(f) in ('ptmx', 'null', 'tty', 'full', 'zero',
188
except UnsafeJail, e:
189
print >> sys.stderr,"""Error: Jail contains world writable path: '%s'.
190
This is a security vulnerability as jail template contents are shared between
191
users. Please either make this path world unwriteable or remove it from the
195
# Copy jail template build to actual jail template
196
template_path = conf['paths']['jails']['template']
110
# IMPORTANT: ivle/conf/conf.py contains details which could compromise security
111
# if left in the jail (such as the DB password). We delete it now! It would be
112
# shadowed by the per-user conf.py anyway, but it's best to be safe.
113
os.unlink(os.path.join(jail_site_packages, 'conf/conf.py'))
114
# XXX: Shouldn't copy the compiled files at all, but compile them in the jail!
115
os.unlink(os.path.join(jail_site_packages, 'conf/conf.pyc'))
197
117
if os.spawnvp(os.P_WAIT, 'rsync', ['rsync', '-a', '--delete',
198
build_path + '/', template_path]) != 0:
118
build_path + '/', ivle.conf.jail_system]) != 0:
199
119
print >> sys.stderr, "Jail copying failed."
202
# Now mangle things a bit, so we can bind-mount the user bits in.
203
# /etc/passwd and /etc/ivle/ivle.conf need to be symlinks to somewhere in /home
205
os.rename(os.path.join(template_path, 'etc/passwd'),
206
os.path.join(template_path, 'home/.passwd')
208
os.symlink('../home/.passwd', os.path.join(template_path, 'etc/passwd'))
210
os.makedirs(os.path.join(template_path, "etc/ivle"))
211
os.symlink('../../home/.ivle.conf',
212
os.path.join(template_path, "etc/ivle/ivle.conf"))