64
83
ivle.jailbuilder.debian.debootstrap_create_jail(conf['jail']['suite'],
65
84
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'])
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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')])
67
101
# Add any extra site apt sources.
68
102
if conf['jail']['extra_sources']:
69
103
ivle.jailbuilder.debian.mangle_sources_list(build_path,
86
119
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.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)
94
121
if conf['jail']['devmode']:
95
122
# Copy all console and operating system files into the jail
96
services_path = os.path.join(ivle.conf.share_path, 'services')
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services_path = os.path.join(conf['paths']['share'], 'services')
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124
jail_services_path = os.path.join(build_path, services_path[1:])
98
125
if os.path.exists(jail_services_path):
99
126
shutil.rmtree(jail_services_path)
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129
# Also copy the IVLE lib directory into the jail
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130
# This is necessary for running certain services
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ivle_site_packages = os.path.join(ivle.conf.python_site_packages, 'ivle')
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jail_site_packages = os.path.join(build_path, ivle_site_packages[1:])
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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
138
# packages directory inside and out (ie. same Python version).
139
# 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
143
jail_site_packages = os.path.join(build_path,
144
options.python_site_packages[1:], "ivle")
106
145
if os.path.exists(jail_site_packages):
107
146
shutil.rmtree(jail_site_packages)
108
147
shutil.copytree(ivle_site_packages, jail_site_packages)
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# 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'))
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# 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']
117
193
if os.spawnvp(os.P_WAIT, 'rsync', ['rsync', '-a', '--delete',
118
build_path + '/', ivle.conf.jail_system]) != 0:
194
build_path + '/', template_path]) != 0:
119
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"))