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#!/bin/env python
#
############################################################################
# this script will read the /etc/passwd file and extract usernames
# that have one of the RESTRICTED_SHELLS. The ouput of this
# script is a list of these restricted usernames suitable for
# use in WORK_DIR/restricted-usernames
#
# such as: python restricted_from_passwd > $WORK_DIR/restricted-usernames
# where $WORK_DIR is your DenyHosts WORK_DIR parameter
#
############################################################################
RESTRICTED_SHELLS = ("/sbin/nologin",
"/sbin/shutdown",
"/sbin/halt")
from pwd import getpwall
passwd = getpwall()
usernames = []
for pw_tuple in passwd:
if pw_tuple[6] in RESTRICTED_SHELLS:
usernames.append(pw_tuple[0])
usernames.sort()
for username in usernames:
print username
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