ansible/user
Stephen Fromm 62a4a68658 Abstract how to look up user password to be more flexible
This adds user_password() to abstract how the user's password is looked
up.  If spwd is not available, this will read the shadow file for the
user's shadow entry.  This will then facilitate idempotent password
changes on hosts without spwd.
2012-08-07 23:57:17 -07:00

332 lines
11 KiB
Python
Executable file

#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2012, Stephen Fromm <sfromm@gmail.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
import os
import pwd
import grp
try:
import spwd
HAVE_SPWD=True
except:
HAVE_SPWD=False
SHADOWFILE = '/etc/shadow'
if os.path.exists('/etc/master.passwd'):
SHADOWFILE = '/etc/master.passwd' # FreeBSD passwd
# Note: while the above has the correct location for where
# encrypted passwords are stored on FreeBSD, the code below doesn't
# invoke adduser in lieu of useradd, nor pw in lieu of usermod.
# That is, this won't work on FreeBSD.
def get_bin_path(module, arg):
if os.path.exists('/usr/sbin/%s' % arg):
return '/usr/sbin/%s' % arg
elif os.path.exists('/sbin/%s' % arg):
return '/sbin/%s' % arg
else:
module.fail_json(msg="Cannot find %s" % arg)
def user_del(module, user, **kwargs):
cmd = [get_bin_path(module, 'userdel')]
for key in kwargs:
if key == 'force' and kwargs[key] == 'yes':
cmd.append('-f')
elif key == 'remove' and kwargs[key] == 'yes':
cmd.append('-r')
cmd.append(user)
p = subprocess.Popen(cmd, shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
(out, err) = p.communicate()
rc = p.returncode
return (rc, out, err)
def user_add(module, user, **kwargs):
cmd = [get_bin_path(module, 'useradd')]
for key in kwargs:
if key == 'uid' and kwargs[key] is not None:
cmd.append('-u')
cmd.append(kwargs[key])
elif key == 'group' and kwargs[key] is not None:
if not group_exists(kwargs[key]):
module.fail_json(msg="Group %s does not exist" % (kwargs[key]))
cmd.append('-g')
cmd.append(kwargs[key])
elif key == 'groups' and kwargs[key] is not None:
for g in kwargs[key].split(','):
if not group_exists(g):
module.fail_json(msg="Group %s does not exist" % (g))
cmd.append('-G')
cmd.append(kwargs[key])
elif key == 'comment' and kwargs[key] is not None:
cmd.append('-c')
cmd.append(kwargs[key])
elif key == 'home' and kwargs[key] is not None:
cmd.append('-d')
cmd.append(kwargs[key])
elif key == 'shell' and kwargs[key] is not None:
cmd.append('-s')
cmd.append(kwargs[key])
elif key == 'password' and kwargs[key] is not None:
cmd.append('-p')
cmd.append(kwargs[key])
elif key == 'createhome':
if kwargs[key] is not None:
if kwargs[key] == 'yes':
cmd.append('-m')
else:
cmd.append('-M')
elif key == 'system' and kwargs[key] == 'yes':
cmd.append('-r')
cmd.append(user)
p = subprocess.Popen(cmd, shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
(out, err) = p.communicate()
rc = p.returncode
return (rc, out, err)
"""
Without spwd, we would have to resort to reading /etc/shadow
to get the encrypted string. For now, punt on idempotent password changes.
"""
def user_mod(module, user, **kwargs):
cmd = [get_bin_path(module, 'usermod')]
info = user_info(user)
for key in kwargs:
if key == 'uid':
if kwargs[key] is not None and info[2] != int(kwargs[key]):
cmd.append('-u')
cmd.append(kwargs[key])
elif key == 'group' and kwargs[key] is not None:
if not group_exists(kwargs[key]):
module.fail_json(msg="Group %s does not exist" % (kwargs[key]))
ginfo = group_info(kwargs[key])
if info[3] != ginfo[2]:
cmd.append('-g')
cmd.append(kwargs[key])
elif key == 'groups' and kwargs[key] is not None:
current_groups = user_group_membership(user)
groups = kwargs[key].split(',')
for g in groups:
if not group_exists(g):
module.fail_json(msg="Group %s does not exist" % (g))
group_diff = set(sorted(current_groups)).symmetric_difference(set(sorted(groups)))
groups_need_mod = False
if group_diff:
if kwargs['append'] is not None and kwargs['append'] == 'yes':
for g in groups:
if g in group_diff:
cmd.append('-a')
groups_need_mod = True
else:
groups_need_mod = True
if groups_need_mod:
cmd.append('-G')
cmd.append(','.join(groups))
elif key == 'comment':
if kwargs[key] is not None and info[4] != kwargs[key]:
cmd.append('-c')
cmd.append(kwargs[key])
elif key == 'home':
if kwargs[key] is not None and info[5] != kwargs[key]:
cmd.append('-d')
cmd.append(kwargs[key])
elif key == 'shell':
if kwargs[key] is not None and info[6] != kwargs[key]:
cmd.append('-s')
cmd.append(kwargs[key])
elif key == 'password':
if kwargs[key] is not None and info[1] != kwargs[key]:
cmd.append('-p')
cmd.append(kwargs[key])
# skip if no changes to be made
if len(cmd) == 1:
return (None, '', '')
cmd.append(user)
p = subprocess.Popen(cmd, shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
(out, err) = p.communicate()
rc = p.returncode
return (rc, out, err)
def group_exists(group):
try:
if group.isdigit():
if grp.getgrgid(group):
return True
else:
if grp.getgrnam(group):
return True
except KeyError:
return False
def group_info(group):
if not group_exists(group):
return False
if group.isdigit():
return list(grp.getgrgid(group))
else:
return list(grp.getgrnam(group))
def user_group_membership(user):
groups = []
info = get_pwd_info(user)
for group in grp.getgrall():
if user in group[3] and info[3] != group[2]:
groups.append(group[0])
return groups
def user_exists(user):
try:
if pwd.getpwnam(user):
return True
except KeyError:
return False
def get_pwd_info(user):
if not user_exists(user):
return False
return list(pwd.getpwnam(user))
def user_info(user):
if not user_exists(user):
return False
info = get_pwd_info(user)
if len(info[1]) == 1 or len(info[1]) == 0:
info[1] = user_password(user)
return info
def user_password(user):
passwd = ''
if not user_exists(user):
return passwd
if HAVE_SPWD:
try:
passwd = spwd.getspnam(user)[1]
except KeyError:
return passwd
else:
# Read shadow file for user's encrypted password string
if os.path.exists(SHADOWFILE) and os.access(SHADOWFILE, os.R_OK):
for line in open(SHADOWFILE).readlines():
if line.startswith('%s:' % user):
passwd = line.split(':')[1]
return passwd
# ===========================================
def main():
module = AnsibleModule(
argument_spec = dict(
state=dict(default='present', choices=['present', 'absent']),
name=dict(required=True),
uid=dict(default=None),
group=dict(default=None),
groups=dict(default=None),
comment=dict(default=None),
home=dict(default=None),
shell=dict(default=None),
password=dict(default=None),
# following options are specific to userdel
force=dict(default='no', choices=['yes', 'no']),
remove=dict(default='no', choices=['yes', 'no']),
# following options are specific to useradd
createhome=dict(default='yes', choices=['yes', 'no']),
system=dict(default='no', choices=['yes', 'no']),
# following options are specific to usermod
append=dict(default='no', choices=['yes', 'no']),
)
)
state = module.params['state']
name = module.params['name']
uid = module.params['uid']
group = module.params['group']
groups = module.params['groups']
comment = module.params['comment']
home = module.params['home']
shell = module.params['shell']
password = module.params['password']
force = module.params['force']
remove = module.params['remove']
createhome = module.params['createhome']
system = module.params['system']
append = module.params['append']
rc = None
out = ''
err = ''
result = {}
result['name'] = name
result['state'] = state
if state == 'absent':
if user_exists(name):
(rc, out, err) = user_del(module, name, force=force, remove=remove)
if rc != 0:
module.fail_json(name=name, msg=err, rc=rc)
result['force'] = force
result['remove'] = remove
elif state == 'present':
if not user_exists(name):
(rc, out, err) = user_add(module,
name, uid=uid, group=group, groups=groups,
comment=comment, home=home, shell=shell,
password=password, createhome=createhome,
system=system)
result['system'] = system
result['createhome'] = createhome
else:
(rc, out, err) = user_mod(module,
name, uid=uid, group=group, groups=groups,
comment=comment, home=home, shell=shell,
password=password, append=append)
result['append'] = append
if rc is not None and rc != 0:
module.fail_json(name=name, msg=err, rc=rc)
if password is not None:
result['password'] = 'NOT_LOGGING_PASSWORD'
if rc is None:
result['changed'] = False
else:
result['changed'] = True
if out:
result['stdout'] = out
if err:
result['stderr'] = err
if user_exists(name):
info = user_info(name)
if info == False:
result['msg'] = "failed to look up user name: %s" % name
result['failed'] = True
result['uid'] = info[2]
result['group'] = info[3]
result['comment'] = info[4]
result['home'] = info[5]
result['shell'] = info[6]
groups = user_group_membership(name)
result['uid'] = info[2]
if len(groups) > 0:
result['groups'] = groups
module.exit_json(**result)
# include magic from lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()