ansible/library/user

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#!/usr/bin/python
# (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/>.
try:
import json
except ImportError:
import simplejson as json
import os
import pwd
import grp
import shlex
import subprocess
import sys
try:
import spwd
HAVE_SPWD=True
except:
HAVE_SPWD=False
USERADD = "/usr/sbin/useradd"
USERMOD = "/usr/sbin/usermod"
USERDEL = "/usr/sbin/userdel"
def exit_json(rc=0, **kwargs):
if 'name' in kwargs:
add_user_info(kwargs)
print json.dumps(kwargs)
sys.exit(rc)
def fail_json(**kwargs):
kwargs['failed'] = True
exit_json(rc=1, **kwargs)
def add_user_info(kwargs):
name = kwargs['name']
if user_exists(name):
kwargs['state'] = 'present'
info = user_info(name)
kwargs['uid'] = info[2]
kwargs['group'] = info[3]
kwargs['comment'] = info[4]
kwargs['home'] = info[5]
kwargs['shell'] = info[6]
kwargs['createhome'] = os.path.exists(info[5])
groups = user_group_membership(name)
if len(groups) > 0:
kwargs['groups'] = groups
else:
kwargs['state'] = 'absent'
return kwargs
def user_del(user, **kwargs):
cmd = [USERDEL]
for key in kwargs:
if key == 'force' and kwargs[key]:
cmd.append('-f')
elif key == 'remove' and kwargs[key]:
cmd.append('-r')
cmd.append(user)
rc = subprocess.call(cmd, shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
if rc == 0:
return True
else:
return False
def user_add(user, **kwargs):
cmd = [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]):
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):
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)
rc = subprocess.call(cmd, shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
if rc == 0:
return True
else:
return False
"""
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(user, **kwargs):
cmd = [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]):
fail_json(msg="Group %s does not exist" % (kwargs[key]))
ginfo = group_info(group)
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):
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:
debug("groups differ, trigger usemod")
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 False
cmd.append(user)
rc = subprocess.call(cmd, shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
if rc == 0:
return True
else:
return False
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
try:
info = get_pwd_info(user)
if HAVE_SPWD:
sinfo = spwd.getspnam(user)
except KeyError:
return False
if HAVE_SPWD:
info[1] = sinfo[1]
return info
# ===========================================
if not os.path.exists(USERADD):
if os.path.exists("/sbin/useradd"):
USERADD = "/sbin/useradd"
else:
fail_json(msg="Cannot find useradd")
if not os.path.exists(USERMOD):
if os.path.exists("/sbin/usermod"):
USERMOD = "/sbin/usermod"
else:
fail_json(msg="Cannot find usermod")
if not os.path.exists(USERDEL):
if os.path.exists("/sbin/userdel"):
USERDEL = "/sbin/userdel"
else:
fail_json(msg="Cannot find userdel")
argfile = sys.argv[1]
args = open(argfile, 'r').read()
items = shlex.split(args)
if not len(items):
fail_json(msg='the module requires arguments -a')
sys.exit(1)
params = {}
for x in items:
(k, v) = x.split("=")
params[k] = v
state = params.get('state','present')
name = params.get('name', None)
uid = params.get('uid', None)
group = params.get('group', None)
groups = params.get('groups', None)
comment = params.get('comment', None)
home = params.get('home', None)
shell = params.get('shell', None)
password = params.get('password', None)
# ===========================================
# following options are specific to userdel
force = params.get('force', False)
remove = params.get('remove', False)
# ===========================================
# following options are specific to useradd
createhome = params.get('createhome', 'yes')
system = params.get('system', 'no')
# ===========================================
# following options are specific to usermod
append = params.get('append', 'no')
if state not in [ 'present', 'absent' ]:
fail_json(msg='invalid state')
if createhome not in [ 'yes', 'no' ]:
fail_json(msg='invalid createhome')
if system not in ['yes', 'no']:
fail_json(msg='invalid system')
if append not in [ 'yes', 'no' ]:
fail_json(msg='invalid append')
if name is None:
fail_json(msg='name is required')
changed = False
rc = 0
if state == 'absent':
if user_exists(name):
changed = user_del(name, force=force, remove=remove)
exit_json(name=name, changed=changed, force=force, remove=remove)
elif state == 'present':
if not user_exists(name):
changed = user_add(name, uid=uid, group=group, groups=groups,
comment=comment, home=home, shell=shell,
password=password, createhome=createhome,
system=system)
else:
changed = user_mod(name, uid=uid, group=group, groups=groups,
comment=comment, home=home, shell=shell,
password=password, append=append)
if password is not None:
exit_json(name=name, changed=changed, password="XXXXXXXX")
else:
exit_json(name=name, changed=changed)
fail_json(name=name, msg='Unexpected position reached')
sys.exit(0)