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#!/usr/bin/python
# postinst script for greylistd
#
# see: dh_installdeb(1)
# summary of how this script can be called:
# * <postinst> `configure' <most-recently-configured-version>
# * <old-postinst> `abort-upgrade' <new version>
# * <conflictor's-postinst> `abort-remove' `in-favour' <package>
# <new-version>
# * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
# <failed-install-package> <version> `removing'
# <conflicting-package> <version>
# for details, see /usr/share/doc/packaging-manual/
#
# quoting from the policy:
# Any necessary prompting should almost always be confined to the
# post-installation script, and should be protected with a conditional
# so that unnecessary prompting doesn't happen if a package's
# installation fails and the `postinst' is called with `abort-upgrade',
# `abort-remove' or `abort-deconfigure'.
from debconf import *
from sys import argv, stderr, exit
from os import spawnlp, P_WAIT, remove, mkdir, chown
from os.path import exists
from shutil import move, copy
from pwd import getpwnam
from grp import getgrgid
def do_configure (oldversion):
runFrontEnd()
db = Debconf()
username = "greylist"
datadir = "/var/lib/greylistd"
rundir = "/var/run/greylistd"
docdir = "/usr/share/doc/greylistd"
exdir = docdir + "/examples"
confdir = "/etc/greylistd"
### If the username does not exist, create it.
try:
getpwnam(username)
except KeyError:
run("adduser", "--system", "--disabled-password", "--group",
"--home", datadir, "--no-create-home", username)
### Obtain the list of members that should be in the greylist group
newmembers = db.get("greylistd/users").split()
### Find the existing members of the group
(name, passwd, uid, gid, gecos, dir, shell) = getpwnam(username)
(groupname, grpasswd, gid, oldmembers) = getgrgid(gid)
### Remove any members no longer desired in the group
for member in oldmembers:
if not member in members:
run("deluser", member, groupname)
### Add new members to the group
for member in members:
if not member in oldmembers:
run("adduser", member, groupname)
### Create and set ownership on directories
for directory in datadir, rundir:
if not exists(directory):
mkdir(directory)
chown(directory, uid, gid)
### Remove obsolete files
for f in "/etc/default/greylist", "/etc/default/greylistd":
if exists(f):
remove(f)
### Move any files in old locations to new ones
for src, dst in ((datadir+"/data", datadir+"/states"),):
if exists(src) and not exists(dst):
move(src, dst)
### Copy default files into place
for src, dst in ((exdir+"/whitelist-hosts", confdir+"whitelist-hosts"),):
if exists(src) and not exists(dst):
copy(src, dst)
def do_reconfigure (oldversion):
return do_configure(oldversion)
def do_abort_upgrade (newversion):
pass
def do_abort_remove (infavour, package, newversion):
pass
def do_abort_deconfigure (infavour, failedpackage, failedversion,
removing, conflictpackage, conflictversion):
pass
def run (command, *args):
return (spawnlp(P_WAIT, command, command, *args) == 0)
if len(argv) < 2:
stderr.write("%s: Missing command\n"%(argv[0]))
exit(1)
name = "do_" + argv[1].lower().replace("-", "_")
args = argv[2:]
try:
function = globals()[name]
function(*args)
except KeyError, e:
stderr.write("%s: Unknown command: %s\n"%(argv[0], argv[1]))
exit(1)
except TypeError, e:
stderr.write("%s: %s\n"%(argv[0], e))
exit(1)
run("update-rc.d", "greylist", "defaults")
run("invoke-rc.d", "greylist", "start")
exit(0)
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