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(login, throw_on_error=True):
133
"""Setup svn authentication for the given user.
134
FIXME: create local.auth entry
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)
221
user.svn_pass = unicode(passwd)
142
ivle.db.DB().update_user(login, svn_pass=passwd)
223
res = subprocess.call(['htpasswd', '-%smb' % create,
224
filename, login, passwd])
144
res = os.system("htpasswd -%smb %s %s %s" % (create,
145
ivle.conf.svn_auth_ivle,
225
147
if res != 0 and throw_on_error:
226
148
raise Exception("Unable to create ivle-auth for %s" % login)
228
150
# Make sure the file is owned by the web server
229
151
if create == "c":
230
chown_to_webserver(filename)
152
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.
156
def generate_manifest(basedir, targetdir, parent=''):
157
""" From a basedir and a targetdir work out which files are missing or out
158
of date and need to be added/updated and which files are redundant and need
161
parent: This is used for the recursive call to track the relative paths
162
that we have decended.
165
cmp = filecmp.dircmp(basedir, targetdir)
167
# Add all new files and files that have changed
168
to_add = [os.path.join(parent,x) for x in (cmp.left_only + cmp.diff_files)]
170
# Remove files that are redundant
171
to_remove = [os.path.join(parent,x) for x in cmp.right_only]
174
for d in cmp.common_dirs:
175
newbasedir = os.path.join(basedir, d)
176
newtargetdir = os.path.join(targetdir, d)
177
newparent = os.path.join(parent, d)
178
(sadd,sremove) = generate_manifest(newbasedir, newtargetdir, newparent)
182
return (to_add, to_remove)
185
def make_jail(username, uid, force=True, svn_pass=None):
186
"""Creates a new user's jail space, in the jail directory as configured in
189
This only creates things within /home - everything else is expected to be
190
part of another UnionFS branch.
240
192
Returns the path to the user's home directory.
242
194
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.
196
Note: This takes separate username and uid arguments. The UID need not
197
*necessarily* correspond to a Unix username at all, if all you are
198
planning to do is setuid to it. This allows the caller the freedom of
199
deciding the binding between username and uid, if any.
201
force: If false, exception if jail already exists for this user.
202
If true (default), overwrites it, but preserves home directory.
204
svn_pass: If provided this will be a string, the randomly-generated
205
Subversion password for this user (if you happen to already have it).
206
If not provided, it will be read from the database.
247
208
# MUST run as root or some of this may fail
248
209
if os.getuid() != 0:
249
210
raise Exception("Must run make_jail as root")
251
212
# tempdir is for putting backup homes in
252
jail_src_base = config['paths']['jails']['src']
253
tempdir = os.path.join(jail_src_base, '__temp__')
213
tempdir = os.path.join(ivle.conf.jail_base, '__temp__')
254
214
if not os.path.exists(tempdir):
255
215
os.makedirs(tempdir)
256
216
elif not os.path.isdir(tempdir):
257
217
os.unlink(tempdir)
258
218
os.mkdir(tempdir)
259
userdir = os.path.join(jail_src_base, user.login)
219
userdir = os.path.join(ivle.conf.jail_src_base, username)
260
220
homedir = os.path.join(userdir, 'home')
261
userhomedir = os.path.join(homedir, user.login) # Return value
221
userhomedir = os.path.join(homedir, username) # Return value
263
223
if os.path.exists(userdir):
270
230
warnings.simplefilter('ignore')
271
231
homebackup = os.tempnam(tempdir)
272
232
warnings.resetwarnings()
273
# Back up the /home directory, delete the entire jail, recreate the
274
# jail directory tree, then copy the /home back
275
# NOTE that shutil.move changed in Python 2.6, it now moves a
276
# directory INTO the target (like `mv`), which it didn't use to do.
277
# This code works regardless.
233
# Note: shutil.move does not behave like "mv" - it does not put a file
234
# into a directory if it already exists, just fails. Therefore it is
235
# not susceptible to tmpnam symlink attack.
278
236
shutil.move(homedir, homebackup)
279
237
shutil.rmtree(userdir)
281
239
shutil.move(homebackup, homedir)
282
240
# Change the ownership of all the files to the right unixid
283
241
logging.debug("chown %s's home directory files to uid %d"
284
%(user.login, user.unixid))
285
os.spawnvp(os.P_WAIT, 'chown', ['chown', '-R', '%d:%d' % (user.unixid,
286
user.unixid), userhomedir])
243
os.chown(userhomedir, uid, uid)
244
for root, dirs, files in os.walk(userhomedir):
245
for fsobj in dirs + files:
246
os.chown(os.path.join(root, fsobj), uid, uid)
288
248
# No user jail exists
289
249
# Set up the user's home directory
290
250
os.makedirs(userhomedir)
291
251
# Chown (and set the GID to the same as the UID).
292
os.chown(userhomedir, user.unixid, user.unixid)
252
os.chown(userhomedir, uid, uid)
293
253
# Chmod to rwxr-xr-x (755)
294
254
os.chmod(userhomedir, 0755)
296
make_ivle_conf(user.login, userdir, user.svn_pass, config)
297
make_etc_passwd(user.login, userdir, config['paths']['jails']['template'],
256
# There are 2 special files which need to be generated specific to this
257
# user: ${python_site_packages}/lib/conf/conf.py and /etc/passwd.
258
# "__" username "__" users are exempt (special)
259
if not (username.startswith("__") and username.endswith("__")):
260
make_conf_py(username, userdir, ivle.conf.jail_system, svn_pass)
261
make_etc_passwd(username, userdir, ivle.conf.jail_system, uid)
300
263
return userhomedir
302
def make_ivle_conf(username, user_jail_dir, svn_pass, sys_config):
303
"""Generate an ivle.conf for a user's jail.
265
def make_conf_py(username, user_jail_dir, staging_dir, svn_pass=None):
305
267
Creates (overwriting any existing file, and creating directories) a
306
file /etc/ivle/ivle.conf in a given user's jail.
308
@param username: Username.
309
@param user_jail_dir: User's jail dir, ie. ['jails']['src'] + username
310
@param svn_pass: User's SVN password.
311
@param sys_config: An ivle.config.Config object (the system-wide config).
268
file ${python_site_packages}/ivle/conf/conf.py in a given user's jail.
270
user_jail_dir: User's jail dir, ie. ivle.conf.jail_base + username
271
staging_dir: The dir with the staging copy of the jail. (With the
272
template conf.py file).
273
svn_pass: As with make_jail. User's SVN password, but if not supplied,
274
will look up in the DB.
313
conf_path = os.path.join(user_jail_dir, "etc/ivle/ivle.conf")
276
template_conf_path = os.path.join(staging_dir,
277
ivle.conf.python_site_packages[1:], "ivle/conf/conf.py")
278
conf_path = os.path.join(user_jail_dir,
279
ivle.conf.python_site_packages[1:], "ivle/conf/conf.py")
314
280
os.makedirs(os.path.dirname(conf_path))
316
# In the "in-jail" version of conf, we don't need MOST of the details
317
# (it would be a security risk to have them here).
318
# So we just write root_dir.
319
conf_obj = ivle.config.Config(blank=True)
320
conf_obj.filename = conf_path
321
conf_obj['urls']['root'] = sys_config['urls']['root']
322
conf_obj['urls']['public_host'] = sys_config['urls']['public_host']
323
conf_obj['urls']['svn_addr'] = sys_config['urls']['svn_addr']
324
conf_obj['user_info']['login'] = username
325
conf_obj['user_info']['svn_pass'] = svn_pass
282
# If svn_pass isn't supplied, grab it from the DB
284
dbconn = ivle.db.DB()
285
svn_pass = dbconn.get_user(username).svn_pass
288
# Read the contents of the template conf file
290
template_conf_file = open(template_conf_path, "r")
291
template_conf_data = template_conf_file.read()
292
template_conf_file.close()
294
# Couldn't open template conf.py for some reason
295
# Just treat it as empty file
296
template_conf_data = ("# Warning: Problem building config script.\n"
297
"# Could not find template conf.py file.\n")
299
conf_file = open(conf_path, "w")
300
conf_file.write(template_conf_data)
301
conf_file.write("\n# The login name for the owner of the jail\n")
302
conf_file.write("login = %s\n" % repr(username))
303
conf_file.write("\n")
304
conf_file.write("# The subversion-only password for the owner of "
306
conf_file.write("svn_pass = %s\n" % repr(svn_pass))
328
309
# Make this file world-readable
329
310
# (chmod 644 conf_path)