74
55
chown_to_webserver(path)
76
def rebuild_svn_config():
57
def rebuild_svn_config(store, config):
77
58
"""Build the complete SVN configuration file.
60
@param config: An ivle.config.Config object.
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")
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)
103
os.rename(ivle.conf.svn_conf + ".new", ivle.conf.svn_conf)
104
chown_to_webserver(ivle.conf.svn_conf)
121
os.rename(temp_name, conf_name)
122
chown_to_webserver(conf_name)
106
def rebuild_svn_group_config():
124
def rebuild_svn_group_config(store, config):
107
125
"""Build the complete SVN configuration file for groups
127
@param config: An ivle.config.Config object.
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'])
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)
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)
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.
135
FIXME: create local.auth entry
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.
137
passwd = md5.new(uuid.uuid4().bytes).digest().encode('hex')
138
if os.path.exists(ivle.conf.svn_auth_ivle):
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):
143
user = ivle.database.User.get_by_login(store, login)
220
user = User.get_by_login(store, login)
144
221
user.svn_pass = unicode(passwd)
146
res = os.system("htpasswd -%smb %s %s %s" % (create,
147
ivle.conf.svn_auth_ivle,
223
res = subprocess.call(['htpasswd', '-%smb' % create,
224
filename, login, passwd])
149
225
if res != 0 and throw_on_error:
150
226
raise Exception("Unable to create ivle-auth for %s" % login)
152
228
# Make sure the file is owned by the web server
153
229
if create == "c":
154
chown_to_webserver(ivle.conf.svn_auth_ivle)
230
chown_to_webserver(filename)
158
def generate_manifest(basedir, targetdir, parent=''):
159
""" From a basedir and a targetdir work out which files are missing or out
160
of date and need to be added/updated and which files are redundant and need
163
parent: This is used for the recursive call to track the relative paths
164
that we have decended.
167
cmp = filecmp.dircmp(basedir, targetdir)
169
# Add all new files and files that have changed
170
to_add = [os.path.join(parent,x) for x in (cmp.left_only + cmp.diff_files)]
172
# Remove files that are redundant
173
to_remove = [os.path.join(parent,x) for x in cmp.right_only]
176
for d in cmp.common_dirs:
177
newbasedir = os.path.join(basedir, d)
178
newtargetdir = os.path.join(targetdir, d)
179
newparent = os.path.join(parent, d)
180
(sadd,sremove) = generate_manifest(newbasedir, newtargetdir, newparent)
184
return (to_add, to_remove)
187
def make_jail(username, uid, force=True, svn_pass=None):
188
"""Creates a new user's jail space, in the jail directory as configured in
191
This only creates things within /home - everything else is expected to be
192
part of another UnionFS branch.
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.
194
240
Returns the path to the user's home directory.
196
242
Chowns the user's directory within the jail to the given UID.
198
Note: This takes separate username and uid arguments. The UID need not
199
*necessarily* correspond to a Unix username at all, if all you are
200
planning to do is setuid to it. This allows the caller the freedom of
201
deciding the binding between username and uid, if any.
203
force: If false, exception if jail already exists for this user.
204
If true (default), overwrites it, but preserves home directory.
206
svn_pass: If provided this will be a string, the randomly-generated
207
Subversion password for this user (if you happen to already have it).
208
If not provided, it will be read from the database.
244
@param force: If False, raise an exception if the user already has a jail.
245
If True (default), rebuild the jail preserving /home.
210
247
# MUST run as root or some of this may fail
211
248
if os.getuid() != 0:
212
249
raise Exception("Must run make_jail as root")
214
251
# tempdir is for putting backup homes in
215
tempdir = os.path.join(ivle.conf.jail_base, '__temp__')
252
jail_src_base = config['paths']['jails']['src']
253
tempdir = os.path.join(jail_src_base, '__temp__')
216
254
if not os.path.exists(tempdir):
217
255
os.makedirs(tempdir)
218
256
elif not os.path.isdir(tempdir):
219
257
os.unlink(tempdir)
220
258
os.mkdir(tempdir)
221
userdir = os.path.join(ivle.conf.jail_src_base, username)
259
userdir = os.path.join(jail_src_base, user.login)
222
260
homedir = os.path.join(userdir, 'home')
223
userhomedir = os.path.join(homedir, username) # Return value
261
userhomedir = os.path.join(homedir, user.login) # Return value
225
263
if os.path.exists(userdir):
232
270
warnings.simplefilter('ignore')
233
271
homebackup = os.tempnam(tempdir)
234
272
warnings.resetwarnings()
235
# Note: shutil.move does not behave like "mv" - it does not put a file
236
# into a directory if it already exists, just fails. Therefore it is
237
# not susceptible to tmpnam symlink attack.
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.
238
278
shutil.move(homedir, homebackup)
239
279
shutil.rmtree(userdir)
241
281
shutil.move(homebackup, homedir)
242
282
# Change the ownership of all the files to the right unixid
243
283
logging.debug("chown %s's home directory files to uid %d"
245
os.chown(userhomedir, uid, uid)
246
for root, dirs, files in os.walk(userhomedir):
247
for fsobj in dirs + files:
248
os.chown(os.path.join(root, fsobj), uid, uid)
284
%(user.login, user.unixid))
285
os.spawnvp(os.P_WAIT, 'chown', ['chown', '-R', '%d:%d' % (user.unixid,
286
user.unixid), userhomedir])
250
288
# No user jail exists
251
289
# Set up the user's home directory
252
290
os.makedirs(userhomedir)
253
291
# Chown (and set the GID to the same as the UID).
254
os.chown(userhomedir, uid, uid)
292
os.chown(userhomedir, user.unixid, user.unixid)
255
293
# Chmod to rwxr-xr-x (755)
256
294
os.chmod(userhomedir, 0755)
258
# There are 2 special files which need to be generated specific to this
259
# user: ${python_site_packages}/lib/conf/conf.py and /etc/passwd.
260
# "__" username "__" users are exempt (special)
261
if not (username.startswith("__") and username.endswith("__")):
262
make_conf_py(username, userdir, ivle.conf.jail_system, svn_pass)
263
make_etc_passwd(username, userdir, ivle.conf.jail_system, uid)
296
make_ivle_conf(user.login, userdir, user.svn_pass, config)
297
make_etc_passwd(user.login, userdir, config['paths']['jails']['template'],
265
300
return userhomedir
267
def make_conf_py(username, user_jail_dir, staging_dir, svn_pass=None):
302
def make_ivle_conf(username, user_jail_dir, svn_pass, sys_config):
303
"""Generate an ivle.conf for a user's jail.
269
305
Creates (overwriting any existing file, and creating directories) a
270
file ${python_site_packages}/ivle/conf/conf.py in a given user's jail.
272
user_jail_dir: User's jail dir, ie. ivle.conf.jail_base + username
273
staging_dir: The dir with the staging copy of the jail. (With the
274
template conf.py file).
275
svn_pass: As with make_jail. User's SVN password, but if not supplied,
276
will look up in the DB.
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).
278
template_conf_path = os.path.join(staging_dir,
279
ivle.conf.python_site_packages[1:], "ivle/conf/conf.py")
280
conf_path = os.path.join(user_jail_dir,
281
ivle.conf.python_site_packages[1:], "ivle/conf/conf.py")
313
conf_path = os.path.join(user_jail_dir, "etc/ivle/ivle.conf")
282
314
os.makedirs(os.path.dirname(conf_path))
284
# If svn_pass isn't supplied, grab it from the DB
286
dbconn = ivle.db.DB()
287
svn_pass = dbconn.get_user(username).svn_pass
290
# Read the contents of the template conf file
292
template_conf_file = open(template_conf_path, "r")
293
template_conf_data = template_conf_file.read()
294
template_conf_file.close()
296
# Couldn't open template conf.py for some reason
297
# Just treat it as empty file
298
template_conf_data = ("# Warning: Problem building config script.\n"
299
"# Could not find template conf.py file.\n")
301
conf_file = open(conf_path, "w")
302
conf_file.write(template_conf_data)
303
conf_file.write("\n# The login name for the owner of the jail\n")
304
conf_file.write("login = %s\n" % repr(username))
305
conf_file.write("\n")
306
conf_file.write("# The subversion-only password for the owner of "
308
conf_file.write("svn_pass = %s\n" % repr(svn_pass))
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
311
328
# Make this file world-readable
312
329
# (chmod 644 conf_path)