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# IVLE - Informatics Virtual Learning Environment
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# Copyright (C) 2007-2008 The University of Melbourne
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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# Allows creation of users. This sets up the following:
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# * User's jail and home directory within the jail.
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# * Subversion repository (TODO)
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# * Check out Subversion workspace into jail (TODO)
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# * Database details for user
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# TODO: Sanitize login name and other fields.
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# Users must not be called "temp" or "template".
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# TODO: When creating a new home directory, chown it to its owner
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def makeuser(username, password, nick, fullname, rolenm, studentid):
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"""Creates a new user on a pre-installed system.
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Sets up the following:
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* User's jail and home directory within the jail.
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* Subversion repository
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* Check out Subversion workspace into jail
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* Database details for user
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homedir = make_jail(username)
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make_user_db(username, password, nick, fullname, rolenm, studentid)
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# TODO: -p password (need to use crypt)
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if os.system("useradd -d %s '%s'" % (homedir, username)) != 0:
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raise Exception("Failed to add Unix user account")
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def make_jail(username, force=True):
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"""Creates a new user's jail space, in the jail directory as configured in
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This expects there to be a "template" directory within the jail root which
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contains all the files for a sample student jail. It creates the student's
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directory in the jail root, by making a hard-link copy of every file in the
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template directory, recursively.
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Returns the path to the user's home directory.
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force: If false, exception if jail already exists for this user.
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If true (default), overwrites it, but preserves home directory.
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# MUST run as root or some of this may fail
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raise Exception("Must run make_jail as root")
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templatedir = os.path.join(conf.jail_base, 'template')
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if not os.path.isdir(templatedir):
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raise Exception("Template jail directory does not exist: " +
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# tempdir is for putting backup homes in
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tempdir = os.path.join(conf.jail_base, 'temp')
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if not os.path.exists(tempdir):
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elif not os.path.isdir(tempdir):
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userdir = os.path.join(conf.jail_base, username)
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homedir = os.path.join(userdir, 'home')
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if os.path.exists(userdir):
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raise Exception("User's jail already exists")
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# User jail already exists. Blow it away but preserve their home
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# Ignore warnings about the use of tmpnam
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warnings.simplefilter('ignore')
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homebackup = os.tempnam(tempdir)
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warnings.resetwarnings()
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# Note: shutil.move does not behave like "mv" - it does not put a file
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# into a directory if it already exists, just fails. Therefore it is
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# not susceptible to tmpnam symlink attack.
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shutil.move(homedir, homebackup)
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# Any errors that occur after making the backup will be caught and
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# the backup will be un-made.
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# XXX This will still leave the user's jail in an unusable state,
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# but at least they won't lose their files.
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shutil.rmtree(userdir)
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# Hard-link (copy aliasing) the entire tree over
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linktree(templatedir, userdir)
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# Set up the user's home directory (restore backup)
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# First make sure the directory is empty and its parent exists
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shutil.rmtree(homedir)
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# XXX If this fails the user's directory will be lost (in the temp
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# directory). But it shouldn't fail as homedir should not exist.
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shutil.move(homebackup, homedir)
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return os.path.join(homedir, username)
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# No user jail exists
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# Hard-link (copy aliasing) the entire tree over
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linktree(templatedir, userdir)
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# Set up the user's home directory
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userhomedir = os.path.join(homedir, username)
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os.mkdir(userhomedir)
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def linktree(src, dst):
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"""Recursively hard-link a directory tree using os.link().
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The destination directory must not already exist.
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If exception(s) occur, an Error is raised with a list of reasons.
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Symlinks are preserved (in fact, hard links are created which point to the
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Code heavily based upon shutil.copytree from Python 2.5 library.
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names = os.listdir(src)
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srcname = os.path.join(src, name)
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dstname = os.path.join(dst, name)
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if os.path.isdir(srcname):
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linktree(srcname, dstname)
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os.link(srcname, dstname)
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# XXX What about devices, sockets etc.?
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except (IOError, os.error), why:
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errors.append((srcname, dstname, str(why)))
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# catch the Error from the recursive copytree so that we can
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# continue with other files
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except Exception, err:
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errors.append(err.args[0])
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shutil.copystat(src, dst)
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# can't copy file access times on Windows
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errors.extend((src, dst, str(why)))
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raise Exception, errors
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def make_user_db(login, password, nick, fullname, rolenm, studentid,
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"""Creates a user's entry in the database, filling in all the fields.
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If force is False, throws an exception if the user already exists.
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If True, overwrites the user's entry in the DB.
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# Delete user if it exists
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dbconn.delete_user(login)
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dbconn.create_user(login, password, nick, fullname, rolenm, studentid)
added
removed
www/common/makeuser.py
