55
74
chown_to_webserver(path)
57
def rebuild_svn_config(store, config):
76
def rebuild_svn_config():
58
77
"""Build the complete SVN configuration file.
60
@param config: An ivle.config.Config object.
62
users = store.find(User)
63
conf_name = config['paths']['svn']['conf']
64
temp_name = conf_name + ".new"
65
f = open(temp_name, "w")
67
# IVLE SVN repository authorisation configuration
69
""" % {'time': time.asctime()})
75
""" % {'login': u.login})
77
# Now we need to grant offering tutors and lecturers access to the latest
78
# submissions in their offerings. There are much prettier ways to do this,
79
# but a lot of browser requests call this function, so it needs to be
80
# fast. We can grab all of the paths needing authorisation directives with
81
# a single query, and we cache the list of viewers for each offering.
82
offering_viewers_cache = {}
83
for (login, psid, pspath, offeringid) in store.find(
84
(User.login, ProjectSubmission.id, ProjectSubmission.path,
86
Assessed.id == ProjectSubmission.assessed_id,
87
User.id == Assessed.user_id,
88
Project.id == Assessed.project_id,
89
ProjectSet.id == Project.project_set_id,
90
Offering.id == ProjectSet.id,
91
ProjectSubmission.date_submitted == Select(
92
Max(ProjectSubmission.date_submitted),
93
ProjectSubmission.assessed_id == Assessed.id,
94
tables=ProjectSubmission
98
# Do we already have the list of logins authorised for this offering
99
# cached? If not, get it.
100
if offeringid not in offering_viewers_cache:
101
offering_viewers_cache[offeringid] = list(store.find(
103
User.id == Enrolment.user_id,
104
Enrolment.offering_id == offeringid,
105
Enrolment.role.is_in((u'tutor', u'lecturer'))
112
""" % {'login': login, 'id': psid, 'path': pspath})
114
for viewer_login in offering_viewers_cache[offeringid]:
115
# We don't want to override the owner's write privilege,
116
# so we don't add them to the read-only ACL.
117
if login != viewer_login:
118
f.write("%s = r\n" % viewer_login)
80
users = conn.get_users()
84
if role not in groups:
86
groups[role].append(u.login)
87
f = open(ivle.conf.svn_conf + ".new", "w")
88
f.write("# IVLE SVN Repositories Configuration\n")
89
f.write("# Auto-generated on %s\n" % time.asctime())
92
for (g,ls) in groups.iteritems():
93
f.write("%s = %s\n" % (g, ",".join(ls)))
96
f.write("[%s:/]\n" % u.login)
97
f.write("%s = rw\n" % u.login)
98
#f.write("@tutor = r\n")
99
#f.write("@lecturer = rw\n")
100
#f.write("@admin = rw\n")
121
os.rename(temp_name, conf_name)
122
chown_to_webserver(conf_name)
103
os.rename(ivle.conf.svn_conf + ".new", ivle.conf.svn_conf)
104
chown_to_webserver(ivle.conf.svn_conf)
124
def rebuild_svn_group_config(store, config):
106
def rebuild_svn_group_config():
125
107
"""Build the complete SVN configuration file for groups
127
@param config: An ivle.config.Config object.
129
conf_name = config['paths']['svn']['group_conf']
130
temp_name = conf_name + ".new"
131
f = open(temp_name, "w")
134
# IVLE SVN group repository authorisation configuration
135
# Generated: %(time)s
137
""" % {'time': time.asctime()})
139
group_members_cache = {}
140
for group in store.find(ProjectGroup):
141
offering = group.project_set.offering
142
reponame = "_".join([offering.subject.short_name,
143
offering.semester.year,
144
offering.semester.semester,
147
f.write("[%s:/]\n" % reponame)
148
if group.id not in group_members_cache:
149
group_members_cache[group.id] = set()
150
for user in group.members:
151
group_members_cache[group.id].add(user.login)
152
f.write("%s = rw\n" % user.login)
110
groups = conn.get_all('project_group',
111
['groupid', 'groupnm', 'projectsetid'])
112
f = open(ivle.conf.svn_group_conf + ".new", "w")
113
f.write("# IVLE SVN Group Repositories Configuration\n")
114
f.write("# Auto-generated on %s\n" % time.asctime())
117
projectsetid = g['projectsetid']
118
offeringinfo = conn.get_offering_info(projectsetid)
119
subj_short_name = offeringinfo['subj_short_name']
120
year = offeringinfo['year']
121
semester = offeringinfo['semester']
122
reponame = "_".join([subj_short_name, year, semester, g['groupnm']])
123
f.write("[%s:/]\n"%reponame)
124
users = conn.get_projectgroup_members(g['groupid'])
126
f.write("%s = rw\n"%u['login'])
155
# Now we need to grant offering tutors and lecturers access to the latest
156
# submissions in their offerings. There are much prettier ways to do this,
157
# but a lot of browser requests call this function, so it needs to be
158
# fast. We can grab all of the paths needing authorisation directives with
159
# a single query, and we cache the list of viewers for each offering.
160
offering_viewers_cache = {}
161
for (ssn, year, sem, name, psid, pspath, gid, offeringid) in store.find(
162
(Subject.short_name, Semester.year, Semester.semester,
163
ProjectGroup.name, ProjectSubmission.id, ProjectSubmission.path,
164
ProjectGroup.id, Offering.id),
165
Assessed.id == ProjectSubmission.assessed_id,
166
ProjectGroup.id == Assessed.project_group_id,
167
Project.id == Assessed.project_id,
168
ProjectSet.id == Project.project_set_id,
169
Offering.id == ProjectSet.offering_id,
170
Subject.id == Offering.subject_id,
171
Semester.id == Offering.semester_id,
172
ProjectSubmission.date_submitted == Select(
173
Max(ProjectSubmission.date_submitted),
174
ProjectSubmission.assessed_id == Assessed.id,
175
tables=ProjectSubmission
179
reponame = "_".join([ssn, year, sem, name])
181
# Do we already have the list of logins authorised for this offering
182
# cached? If not, get it.
183
if offeringid not in offering_viewers_cache:
184
offering_viewers_cache[offeringid] = list(store.find(
186
User.id == Enrolment.user_id,
187
Enrolment.offering_id == offeringid,
188
Enrolment.role.is_in((u'tutor', u'lecturer'))
195
""" % {'repo': reponame, 'id': psid, 'path': pspath})
197
for viewer_login in offering_viewers_cache[offeringid]:
198
# Skip existing group members, or they can't write to it any more.
199
if viewer_login not in group_members_cache[gid]:
200
f.write("%s = r\n" % viewer_login)
203
os.rename(temp_name, conf_name)
204
chown_to_webserver(conf_name)
206
def make_svn_auth(store, login, config, throw_on_error=True):
207
"""Create a Subversion password for a user.
209
Generates a new random Subversion password, and assigns it to the user.
210
The password is added to Apache's Subversion authentication file.
129
os.rename(ivle.conf.svn_group_conf + ".new", ivle.conf.svn_group_conf)
130
chown_to_webserver(ivle.conf.svn_group_conf)
132
def make_svn_auth(store, login, throw_on_error=True):
133
"""Setup svn authentication for the given user.
134
Uses the given DB store object. Does not commit to the db.
212
# filename is, eg, /var/lib/ivle/svn/ivle.auth
213
filename = config['paths']['svn']['auth_ivle']
214
passwd = hashlib.md5(uuid.uuid4().bytes).hexdigest()
215
if os.path.exists(filename):
136
passwd = md5.new(uuid.uuid4().bytes).digest().encode('hex')
137
if os.path.exists(ivle.conf.svn_auth_ivle):
220
user = User.get_by_login(store, login)
142
user = ivle.database.User.get_by_login(store, login)
221
143
user.svn_pass = unicode(passwd)
223
res = subprocess.call(['htpasswd', '-%smb' % create,
224
filename, login, passwd])
145
res = os.system("htpasswd -%smb %s %s %s" % (create,
146
ivle.conf.svn_auth_ivle,
225
148
if res != 0 and throw_on_error:
226
149
raise Exception("Unable to create ivle-auth for %s" % login)
228
151
# Make sure the file is owned by the web server
229
152
if create == "c":
230
chown_to_webserver(filename)
153
chown_to_webserver(ivle.conf.svn_auth_ivle)
234
def make_jail(user, config, force=True):
235
"""Create or update a user's jail.
237
Only the user-specific parts of the jail are created here - everything
238
else is expected to be part of another aufs branch.
157
def generate_manifest(basedir, targetdir, parent=''):
158
""" From a basedir and a targetdir work out which files are missing or out
159
of date and need to be added/updated and which files are redundant and need
162
parent: This is used for the recursive call to track the relative paths
163
that we have decended.
166
cmp = filecmp.dircmp(basedir, targetdir)
168
# Add all new files and files that have changed
169
to_add = [os.path.join(parent,x) for x in (cmp.left_only + cmp.diff_files)]
171
# Remove files that are redundant
172
to_remove = [os.path.join(parent,x) for x in cmp.right_only]
175
for d in cmp.common_dirs:
176
newbasedir = os.path.join(basedir, d)
177
newtargetdir = os.path.join(targetdir, d)
178
newparent = os.path.join(parent, d)
179
(sadd,sremove) = generate_manifest(newbasedir, newtargetdir, newparent)
183
return (to_add, to_remove)
186
def make_jail(username, uid, force=True, svn_pass=None):
187
"""Creates a new user's jail space, in the jail directory as configured in
190
This only creates things within /home - everything else is expected to be
191
part of another UnionFS branch.
240
193
Returns the path to the user's home directory.
242
195
Chowns the user's directory within the jail to the given UID.
244
@param force: If False, raise an exception if the user already has a jail.
245
If True (default), rebuild the jail preserving /home.
197
Note: This takes separate username and uid arguments. The UID need not
198
*necessarily* correspond to a Unix username at all, if all you are
199
planning to do is setuid to it. This allows the caller the freedom of
200
deciding the binding between username and uid, if any.
202
force: If false, exception if jail already exists for this user.
203
If true (default), overwrites it, but preserves home directory.
205
svn_pass: If provided this will be a string, the randomly-generated
206
Subversion password for this user (if you happen to already have it).
207
If not provided, it will be read from the database.
247
209
# MUST run as root or some of this may fail
248
210
if os.getuid() != 0:
249
211
raise Exception("Must run make_jail as root")
251
213
# tempdir is for putting backup homes in
252
jail_src_base = config['paths']['jails']['src']
253
tempdir = os.path.join(jail_src_base, '__temp__')
214
tempdir = os.path.join(ivle.conf.jail_base, '__temp__')
254
215
if not os.path.exists(tempdir):
255
216
os.makedirs(tempdir)
256
217
elif not os.path.isdir(tempdir):
257
218
os.unlink(tempdir)
258
219
os.mkdir(tempdir)
259
userdir = os.path.join(jail_src_base, user.login)
220
userdir = os.path.join(ivle.conf.jail_src_base, username)
260
221
homedir = os.path.join(userdir, 'home')
261
tmpdir = os.path.join(userdir, 'tmp')
262
userhomedir = os.path.join(homedir, user.login) # Return value
222
userhomedir = os.path.join(homedir, username) # Return value
264
224
if os.path.exists(userdir):
271
231
warnings.simplefilter('ignore')
272
232
homebackup = os.tempnam(tempdir)
273
233
warnings.resetwarnings()
274
# Back up the /home directory, delete the entire jail, recreate the
275
# jail directory tree, then copy the /home back
276
# NOTE that shutil.move changed in Python 2.6, it now moves a
277
# directory INTO the target (like `mv`), which it didn't use to do.
278
# This code works regardless.
279
shutil.move(userhomedir, homebackup)
234
# Note: shutil.move does not behave like "mv" - it does not put a file
235
# into a directory if it already exists, just fails. Therefore it is
236
# not susceptible to tmpnam symlink attack.
237
shutil.move(homedir, homebackup)
280
238
shutil.rmtree(userdir)
281
239
os.makedirs(homedir)
282
shutil.move(homebackup, userhomedir)
240
shutil.move(homebackup, homedir)
283
241
# Change the ownership of all the files to the right unixid
284
242
logging.debug("chown %s's home directory files to uid %d"
285
%(user.login, user.unixid))
286
os.spawnvp(os.P_WAIT, 'chown', ['chown', '-R', '%d:%d' % (user.unixid,
287
user.unixid), userhomedir])
244
os.chown(userhomedir, uid, uid)
245
for root, dirs, files in os.walk(userhomedir):
246
for fsobj in dirs + files:
247
os.chown(os.path.join(root, fsobj), uid, uid)
289
249
# No user jail exists
290
250
# Set up the user's home directory
291
251
os.makedirs(userhomedir)
292
252
# Chown (and set the GID to the same as the UID).
293
os.chown(userhomedir, user.unixid, user.unixid)
253
os.chown(userhomedir, uid, uid)
294
254
# Chmod to rwxr-xr-x (755)
295
255
os.chmod(userhomedir, 0755)
297
make_ivle_conf(user.login, userdir, user.svn_pass, config)
298
make_etc_passwd(user.login, userdir, config['paths']['jails']['template'],
301
os.chmod(tmpdir, 01777)
257
# There are 2 special files which need to be generated specific to this
258
# user: ${python_site_packages}/lib/conf/conf.py and /etc/passwd.
259
# "__" username "__" users are exempt (special)
260
if not (username.startswith("__") and username.endswith("__")):
261
make_conf_py(username, userdir, ivle.conf.jail_system, svn_pass)
262
make_etc_passwd(username, userdir, ivle.conf.jail_system, uid)
303
264
return userhomedir
305
def make_ivle_conf(username, user_jail_dir, svn_pass, sys_config):
306
"""Generate an ivle.conf for a user's jail.
266
def make_conf_py(username, user_jail_dir, staging_dir, svn_pass=None):
308
268
Creates (overwriting any existing file, and creating directories) a
309
file /etc/ivle/ivle.conf in a given user's jail.
311
@param username: Username.
312
@param user_jail_dir: User's jail dir, ie. ['jails']['src'] + username
313
@param svn_pass: User's SVN password.
314
@param sys_config: An ivle.config.Config object (the system-wide config).
269
file ${python_site_packages}/ivle/conf/conf.py in a given user's jail.
271
user_jail_dir: User's jail dir, ie. ivle.conf.jail_base + username
272
staging_dir: The dir with the staging copy of the jail. (With the
273
template conf.py file).
274
svn_pass: As with make_jail. User's SVN password, but if not supplied,
275
will look up in the DB.
316
conf_path = os.path.join(user_jail_dir, "home/.ivle.conf")
317
if not os.path.exists(os.path.dirname(conf_path)):
318
os.makedirs(os.path.dirname(conf_path))
320
# In the "in-jail" version of conf, we don't need MOST of the details
321
# (it would be a security risk to have them here).
322
# So we just write root_dir.
323
conf_obj = ivle.config.Config(blank=True)
324
conf_obj.filename = conf_path
325
conf_obj['urls']['root'] = sys_config['urls']['root']
326
conf_obj['urls']['public_host'] = sys_config['urls']['public_host']
327
conf_obj['urls']['svn_addr'] = sys_config['urls']['svn_addr']
328
conf_obj['user_info']['login'] = username
329
conf_obj['user_info']['svn_pass'] = svn_pass
277
template_conf_path = os.path.join(staging_dir,
278
ivle.conf.python_site_packages[1:], "ivle/conf/conf.py")
279
conf_path = os.path.join(user_jail_dir,
280
ivle.conf.python_site_packages[1:], "ivle/conf/conf.py")
281
os.makedirs(os.path.dirname(conf_path))
283
# If svn_pass isn't supplied, grab it from the DB
285
dbconn = ivle.db.DB()
286
svn_pass = dbconn.get_user(username).svn_pass
289
# Read the contents of the template conf file
291
template_conf_file = open(template_conf_path, "r")
292
template_conf_data = template_conf_file.read()
293
template_conf_file.close()
295
# Couldn't open template conf.py for some reason
296
# Just treat it as empty file
297
template_conf_data = ("# Warning: Problem building config script.\n"
298
"# Could not find template conf.py file.\n")
300
conf_file = open(conf_path, "w")
301
conf_file.write(template_conf_data)
302
conf_file.write("\n# The login name for the owner of the jail\n")
303
conf_file.write("login = %s\n" % repr(username))
304
conf_file.write("\n")
305
conf_file.write("# The subversion-only password for the owner of "
307
conf_file.write("svn_pass = %s\n" % repr(svn_pass))
332
310
# Make this file world-readable
333
311
# (chmod 644 conf_path)