304 lines
14 KiB
Python
304 lines
14 KiB
Python
#!/bin/python
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# -*- coding: utf-8 -*-
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# Fenrir TTY screen reader
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# By Chrys, Storm Dragon, and contributers.
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#attrib:
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#http://rampex.ihep.su/Linux/linux_howto/html/tutorials/mini/Colour-ls-6.html
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#0 = black, 1 = blue, 2 = green, 3 = cyan, 4 = red, 5 = purple, 6 = brown/yellow, 7 = white.
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#https://github.com/jwilk/vcsapeek/blob/master/linuxvt.py
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#blink = 5 if attr & 1 else 0
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#bold = 1 if attr & 16 else 0
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import subprocess
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import glob, os
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import termios
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import time
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import select
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import dbus
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import fcntl
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from array import array
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from fcntl import ioctl
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from struct import unpack_from, unpack, pack
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from fenrirscreenreader.core import debug
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from fenrirscreenreader.core.eventData import fenrirEventType
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from fenrirscreenreader.core.screenDriver import screenDriver
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class driver(screenDriver):
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def __init__(self):
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screenDriver.__init__(self)
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self.ListSessions = None
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self.sysBus = None
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self.charmap = {}
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self.bgColorValues = {0: 'black', 1: 'blue', 2: 'green', 3: 'cyan', 4: 'red', 5: 'magenta', 6: 'brown/yellow', 7: 'white'}
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self.fgColorValues = {0: 'black', 1: 'blue', 2: 'green', 3: 'cyan', 4: 'red', 5: 'magenta', 6: 'brown/yellow', 7: 'light gray', 8: 'dark gray', 9: 'light blue', 10: 'light green', 11: 'light cyan', 12: 'light red', 13: 'light magenta', 14: 'light yellow', 15: 'white'}
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self.hichar = None
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def initialize(self, environment):
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self.env = environment
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self.env['runtime']['attributeManager'].appendDefaultAttributes([
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self.fgColorValues[7], # fg
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self.bgColorValues[0], # bg
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False, # bold
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False, # italics
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False, # underscore
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False, # strikethrough
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False, # reverse
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False, # blink
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'default', # fontsize
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'default' # fontfamily
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]) #end attribute )
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self.env['runtime']['processManager'].addCustomEventThread(self.updateWatchdog, multiprocess=True)
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def getCurrScreen(self):
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self.env['screen']['oldTTY'] = self.env['screen']['newTTY']
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try:
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currScreenFile = open('/sys/devices/virtual/tty/tty0/active','r')
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self.env['screen']['newTTY'] = str(currScreenFile.read()[3:-1])
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currScreenFile.close()
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except Exception as e:
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self.env['runtime']['debug'].writeDebugOut(str(e),debug.debugLevel.ERROR)
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def injectTextToScreen(self, text, screen = None):
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useScreen = "/dev/tty" + self.env['screen']['newTTY']
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if screen != None:
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useScreen = screen
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with open(useScreen, 'w') as fd:
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for c in text:
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fcntl.ioctl(fd, termios.TIOCSTI, c)
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def getSessionInformation(self):
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self.env['screen']['autoIgnoreScreens'] = []
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try:
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if not self.sysBus:
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self.sysBus = dbus.SystemBus()
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obj = self.sysBus.get_object('org.freedesktop.login1', '/org/freedesktop/login1')
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inf = dbus.Interface(obj, 'org.freedesktop.login1.Manager')
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self.ListSessions = inf.get_dbus_method('ListSessions')
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sessions = self.ListSessions()
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for session in sessions:
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obj = self.sysBus.get_object('org.freedesktop.login1', session[4])
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inf = dbus.Interface(obj, 'org.freedesktop.DBus.Properties')
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sessionType = inf.Get('org.freedesktop.login1.Session', 'Type')
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screen = str(inf.Get('org.freedesktop.login1.Session', 'VTNr'))
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if screen == '':
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screen = str(inf.Get('org.freedesktop.login1.Session', 'TTY'))
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screen = screen[screen.upper().find('TTY') + 3:]
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if screen == '':
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self.env['runtime']['debug'].writeDebugOut('No TTY found for session:' + session[4],debug.debugLevel.ERROR)
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return
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if sessionType.upper() != 'TTY':
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self.env['screen']['autoIgnoreScreens'] += [screen]
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if screen == self.env['screen']['newTTY'] :
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if self.env['general']['currUser'] != session[2]:
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self.env['general']['prevUser'] = self.env['general']['currUser']
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self.env['general']['currUser'] = session[2]
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except Exception as e:
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self.env['runtime']['debug'].writeDebugOut('getSessionInformation: Maybe no LoginD:' + str(e),debug.debugLevel.ERROR)
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#self.env['runtime']['debug'].writeDebugOut('getSessionInformation:' + str(self.env['screen']['autoIgnoreScreens']) + ' ' + str(self.env['general']) ,debug.debugLevel.INFO)
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def updateWatchdog(self,active , eventQueue):
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try:
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vcsa = {}
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vcsaDevices = glob.glob('/dev/vcsa*')
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for vcsaDev in vcsaDevices:
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index = vcsaDev[9:]
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vcsa[str(index)] = open(vcsaDev,'rb')
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tty = open('/sys/devices/virtual/tty/tty0/active','r')
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currScreen = str(tty.read()[3:-1])
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oldScreen = currScreen
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self.updateCharMap(currScreen)
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watchdog = select.epoll()
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watchdog.register(vcsa[currScreen], select.POLLPRI | select.POLLERR)
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watchdog.register(tty, select.POLLPRI | select.POLLERR)
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while active.value == 1:
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changes = watchdog.poll(1)
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for change in changes:
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fileno = change[0]
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event = change[1]
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if fileno == tty.fileno():
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self.env['runtime']['debug'].writeDebugOut('ScreenChange',debug.debugLevel.INFO)
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tty.seek(0)
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currScreen = str(tty.read()[3:-1])
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if currScreen != oldScreen:
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try:
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watchdog.unregister(vcsa[ oldScreen ])
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except:
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pass
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try:
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watchdog.register(vcsa[ currScreen ], select.POLLPRI | select.POLLERR)
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except:
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pass
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self.updateCharMap(currScreen)
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oldScreen = currScreen
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try:
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vcsa[currScreen].seek(0)
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lastScreenContent = vcsa[currScreen].read()
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except:
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pass
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eventQueue.put({"Type":fenrirEventType.ScreenChanged,
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"Data":self.createScreenEventData(currScreen,lastScreenContent)
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})
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else:
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self.env['runtime']['debug'].writeDebugOut('ScreenUpdate',debug.debugLevel.INFO)
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vcsa[currScreen].seek(0)
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dirtyContent = vcsa[currScreen].read()
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screenContent = b''
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timeout = time.time()
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while screenContent != dirtyContent:
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screenContent = dirtyContent
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if time.time() - timeout >= 0.4:
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break
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time.sleep(0.02)
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vcsa[currScreen].seek(0)
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dirtyContent = vcsa[currScreen].read()
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eventQueue.put({"Type":fenrirEventType.ScreenUpdate,
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"Data":self.createScreenEventData(currScreen,screenContent)
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})
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except Exception as e:
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self.env['runtime']['debug'].writeDebugOut('VCSA:updateWatchdog:' + str(e),debug.debugLevel.ERROR)
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time.sleep(0.2)
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def createScreenEventData(self, screen, content):
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eventData = {
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'bytes': content,
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'lines': int( content[0]),
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'columns': int( content[1]),
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'textCursor':
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{
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'x': int( content[2]),
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'y': int( content[3])
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},
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'screen': screen,
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'screenUpdateTime': time.time(),
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}
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eventData['text'], eventData['attributes'] =\
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self.autoDecodeVCSA(content[4:], eventData['lines'], eventData['columns'])
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return eventData.copy()
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def updateCharMap(self, screen):
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self.charmap = {}
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try:
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tty = open('/dev/tty' + screen, 'rb')
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except Exception as e:
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self.env['runtime']['debug'].writeDebugOut('VCSA:updateCharMap:' + str(e),debug.debugLevel.ERROR)
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return
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GIO_UNIMAP = 0x4B66
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VT_GETHIFONTMASK = 0x560D
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himask = array("H", (0,))
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ioctl(tty, VT_GETHIFONTMASK, himask)
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self.hichar, = unpack_from("@H", himask)
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sz = 512
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line = ''
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while True:
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try:
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unipairs = array("H", [0]*(2*sz))
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unimapdesc = array("B", pack("@HP", sz, unipairs.buffer_info()[0]))
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ioctl(tty.fileno(), GIO_UNIMAP, unimapdesc)
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break
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except Exception as e:
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self.env['runtime']['debug'].writeDebugOut('VCSA:updateCharMap:scaling up sz=' + str(sz) + ' ' + str(e),debug.debugLevel.WARNING)
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sz *= 2
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tty.close()
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ncodes, = unpack_from("@H", unimapdesc)
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utable = unpack_from("@%dH" % (2*ncodes), unipairs)
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for u, b in zip(utable[::2], utable[1::2]):
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if self.charmap.get(b) is None:
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self.charmap[b] = chr(u)
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def autoDecodeVCSA(self, allData, rows, cols):
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allText = ''
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allAttrib = []
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i = 0
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for y in range(rows):
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lineText = ''
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lineAttrib = []
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for x in range(cols):
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data = allData[i: i + 2]
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i += 2
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if data == b' \x07':
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#attr = 7
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#ink = 7
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#paper = 0
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#ch = ' '
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charAttrib = [
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self.fgColorValues[7], # fg
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self.bgColorValues[0], # bg
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False, # bold
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False, # italics
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False, # underscore
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False, # strikethrough
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False, # reverse
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False, # blink
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'default', # fontsize
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'default'] # fontfamily
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lineAttrib.append(charAttrib)
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lineText += ' '
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continue
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(sh,) = unpack("=H", data)
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attr = (sh >> 8) & 0xFF
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ch = sh & 0xFF
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if self.hichar == 0x100:
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attr >>= 1
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ink = attr & 0x0F
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paper = (attr>>4) & 0x0F
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blink = 0
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if attr & 1:
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blink = 1
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# blink seems to be set always, ignore for now
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blink = 0
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bold = 0
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if attr & 16:
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bold = 1
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#if (ink != 7) or (paper != 0):
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# print(ink,paper)
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if sh & self.hichar:
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ch |= 0x100
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try:
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lineText += self.charmap[ch]
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except KeyError:
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lineText += '?'
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charAttrib = [
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self.fgColorValues[ink],
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self.bgColorValues[paper],
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bold == 1, # bold
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False, # italics
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False, # underscore
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False, # strikethrough
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False, # reverse
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blink == 1, # blink
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'default', # fontsize
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'default'] # fontfamily
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lineAttrib.append(charAttrib)
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allText += lineText
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if y + 1 < rows:
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allText += '\n'
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allAttrib.append(lineAttrib)
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return str(allText), allAttrib
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def getCurrApplication(self):
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apps = []
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try:
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currScreen = self.env['screen']['newTTY']
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apps = subprocess.Popen('ps -t tty' + currScreen + ' -o comm,tty,stat', shell=True, stdout=subprocess.PIPE).stdout.read().decode()[:-1].split('\n')
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except Exception as e:
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self.env['runtime']['debug'].writeDebugOut(str(e),debug.debugLevel.ERROR)
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return
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try:
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for i in apps:
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i = i.upper()
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i = i.split()
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i[0] = i[0]
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i[1] = i[1]
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if '+' in i[2]:
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if i[0] != '':
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if not "GREP" == i[0] and \
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not "SH" == i[0] and \
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not "PS" == i[0]:
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if "TTY"+currScreen in i[1]:
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if self.env['screen']['newApplication'] != i[0]:
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self.env['screen']['newApplication'] = i[0]
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return
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except Exception as e:
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self.env['runtime']['debug'].writeDebugOut(str(e),debug.debugLevel.ERROR)
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