Created
December 2, 2016 17:48
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#!/usr/bin/python3 | |
import sh | |
import re | |
HUMANS = ['jkane', 'djames', 'mkirk'] | |
def clean_passwd(h, humans): | |
clean = [] | |
for row in h: | |
user = row.split(':') | |
if user[0] not in humans: | |
clean.append(row.strip()) | |
else: | |
print('Removing %r' % user[0]) | |
return "\n".join(clean) + "\n" | |
def clean_group(h, humans): | |
clean = [] | |
for row in h: | |
group = row.split(':') | |
users = group[-1].split(',') | |
new_users = [] | |
for user in users: | |
user = user.strip() | |
if user not in humans: | |
new_users.append(user) | |
else: | |
print('Removing %r from group %r' % (user, group[0])) | |
group[-1] = ",".join(new_users) | |
if group[0] not in humans: | |
clean.append(':'.join(group)) | |
else: | |
print('Removing group %r' % group[0]) | |
return "\n".join(clean) + "\n" | |
def clean_shadow(h, humans): | |
"""format of /etc/shadow is close-enough to password for our purposes""" | |
return clean_passwd(h, humans) | |
for human in HUMANS: | |
try: | |
uid, gid, groups = sh.id(human).split() | |
except sh.ErrorReturnCode_1: | |
print('Human %r not found.' % human) | |
continue | |
old_uid = int(re.search("uid=(\d*)\(.*", uid).group(1)) | |
old_gid = int(re.search("gid=(\d*)\(.*", gid).group(1)) | |
print("Human %r was uid %r / gid %r" % (human, old_uid, old_gid)) | |
with open('/etc/passwd', 'r') as h: | |
clean = clean_passwd(h, [human]) | |
with open('/etc/passwd', 'w') as h: | |
h.write(clean) | |
with open('/etc/group', 'r') as h: | |
clean = clean_group(h, [human]) | |
with open('/etc/group', 'w') as h: | |
h.write(clean) | |
with open('/etc/shadow', 'r') as h: | |
clean = clean_shadow(h, [human]) | |
with open('/etc/shadow', 'w') as h: | |
h.write(clean) | |
try: | |
uid, gid, groups = sh.id(human).split() | |
except sh.ErrorReturnCode_1: | |
print('Human %r not found.' % human) | |
continue | |
new_uid = int(re.search("uid=(\d*)\(.*", uid).group(1)) | |
new_gid = int(re.search("gid=(\d*)\(.*", gid).group(1)) | |
print("Human %r is now uid %r / gid %r" % (human, new_uid, new_gid)) | |
if new_uid != old_uid: | |
# change every file owned by old_uid to be owned by this human | |
sh.find("/", "-uid", old_uid, "-exec", "chown", human, "{}", "+") | |
if new_gid != old_gid: | |
# change every file owned by old_gid to be owned by the new group | |
# the -h is to avoid reaching through symlinks and instead change the sym itself | |
sh.find("/", "-gid", old_gid, "-exec", "chgrp", "-h", new_gid, "{}", "+") |
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