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# -*- python -*-
'''
xpybar – xmobar replacement written in python
Copyright © 2014, 2015 Mattias Andrée (maandree@member.fsf.org)
This program 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.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
'''
import os
from util import *
class Users:
'''
Gets the logged in users and what TTY:s they are using
@variable users:dict<str, list<str>> Map from logged in users to acquired TTY:s (all might not be listed)
'''
def __init__(self, method = 'devfs'):
'''
Constructor
@param method:str|()→itr<str> The user listing method
'''
users = Users.who
if not isinstance(method, str):
users = method
elif method == 'who': users = Users.who
elif method == 'w': users = Users.w
elif method == 'devfs': users = Users.devfs
users = users()
self.users = {}
for (user, tty) in users:
if user not in self.users:
self.users[user] = []
self.users[user].append(tty)
@staticmethod
def who():
'''
Use Coreutil's `who` command to fetch users and ttys
@return :list<(user:str, tty:str>) List of user–tty pairs
'''
users = spawn('who').read().decode('utf-8', 'replace').split('\n')[:-1]
users = [list(filter(lambda cell : not cell == '', line.split(' ')))[:2] for line in users]
return users
@staticmethod
def w():
'''
Use procps-ng's `w` command to fetch users and ttys
@return :list<(user:str, tty:str>) List of user–tty pairs
'''
users = spawn('w').read().decode('utf-8', 'replace').split('\n')[2 : -1]
users = [list(filter(lambda cell : not cell == '', line.split(' ')))[:2] for line in users]
return users
@staticmethod
def devfs(try_to_find_root = False):
'''
Walk /dev to find TTY acquisitions
@param try_to_find_root:bool Whether to list root for /dev/tty[[:numeric:]]+ if the permission bits looks good
@return :list<(user:str, tty:str>) List of user–tty pairs
'''
import pwd
def num(s):
return (not s == '') and (0 == len(list(filter(lambda c : not ('0' <= c <= '9'), s))))
ttys = [f for f in os.listdir('/dev') if f.startswith('tty') and num(f[3:])]
ttys += ['pts/' + f for f in os.listdir('/dev/pts') if num(f)]
users, rc = {}, []
for tty in ttys:
try:
attr = os.stat('/dev/' + tty)
except:
continue
if ('/' not in tty) and (attr.st_uid == 0):
if not (try_to_find_root and (attr.st_mode == 0o20600)):
continue
user = attr.st_uid
if user in users:
user = users[user]
else:
try:
users[user] = user = pwd.getpwuid(user).pw_name
except:
users[user] = user = str(user)
rc.append((user, tty))
return rc
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