Refined sub driver search
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ultramagnus_tcv
parent
789aa4a3f1
commit
fcd45f53bb
99
3Slurp.py
99
3Slurp.py
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@ -3,17 +3,13 @@ import os
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def readUnpack(bytes, **options):
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if options.get("type") == 't':
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#print 'DEBUG: In t'
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SOS = SOSfile.read(bytes)
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text_unpacked = unpack('%ss' % bytes, SOS)
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return ''.join(text_unpacked)
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if options.get("type") == 'b':
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#print 'DEBUG: In b', bytes
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SOS = SOSfile.read(bytes)
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#print 'DEBUG: In b2', bytes, SOS
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offset_unpacked = unpack ('< H', SOS)
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#print 'DEBUG: In b3', bytes, SOS
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return int('.'.join(str(x) for x in offset_unpacked))
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if options.get("type") == '1':
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@ -43,21 +39,19 @@ dev_types ={273: 'Character Device, Write-Only, Formatter',
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mfgs = {17491: 'David Schmidt'} # dictionary for manufacturers
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#Clear SCREEN
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print("\033c");
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print("\033c"); # clear screen
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#Is File a SOS DRIVER file?
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SOSfile = open('SOSCFFA.DRIVER', 'rb') # open file to interrogate
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filetype = readUnpack(8, type = 't') # read first eight bytes and stick returned text into filetype
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SOSfile = open('SOSCFFA.DRIVER', 'rb')
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filetype = readUnpack(8, type = 't')
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if filetype == 'SOS DRVR': # is filetype 'SOS DRVR'??
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print "This is a proper SOS.DRIVER file." # output, this is a proper file
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print "Filetype is: %s." % (filetype) # output filetype found.
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else: # otherwise....
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print "Filetype is: %s." % (filetype) # output what was found
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print "This is not a proper SOS.DRIVER file" # ouput, this is not a proper SOS file
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exit() # nothing to be done, exit script
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if filetype == 'SOS DRVR':
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print "This is a proper SOS file."
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print "Filetype is: %s." % (filetype)
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else:
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print "Filetype is: %s." % (filetype)
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print "This is not a proper SOS file"
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exit()
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rel_offset = readUnpack(2, type = 'b') # read two bytes after SOS DRVR to establish first rel_offset value
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print "The first relative offset value is", rel_offset, hex(rel_offset) # print out for debug
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@ -66,29 +60,36 @@ drivers_list=[] # initia
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loop = True # set True for major driver loop
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while loop : # establish loop to find major drivers
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driver = {} # intialize a dictionary to hold vaules as we loop
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SOSfile.seek(rel_offset,1) # jump to location of first driver
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driver['location'] = SOSfile.tell() # add to driver dictionary 52c
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rel_offset = readUnpack(2, type = 'b') # 0000 comment length
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if rel_offset == 0xFFFF: # if we encounter FFFF, no more drivers
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loop = False # set loop to False to cancel while
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else :
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drivers_list.append(driver) # add to drivers_list list
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SOSfile.seek(rel_offset,1) # seek forward based on contents of rel_offset
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rel_offset = readUnpack(2, type = 'b') # read 2 bytes and stick into rel_offset
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SOSfile.seek(rel_offset,1) # seek forward based on contents of rel_offset
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rel_offset = readUnpack(2, type = 'b') # read 2 bytes and stick into rel_offset
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driver = {} # initialize a dictionary to hold each major driver
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SOSfile.seek(rel_offset,1) # jump past comment
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atell = SOSfile.tell()
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driver['comment_start'] = SOSfile.tell() # add new driver location to driver dictionary
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rel_offset = readUnpack(2, type = 'b') # grab next two bytes to set up jump and to see if we're at the end of drivers
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atell = SOSfile.tell()
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if rel_offset == 0xFFFF: # if we encounter FFFF, no more drivers and
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loop = False # set loop to False; no more drivers
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else : # otherwise....
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drivers_list.append(driver) # append a new list entry
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SOSfile.seek(rel_offset,1) # jump (1 of 2) distance found in previous 2 bytes read
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atell = SOSfile.tell()
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rel_offset = readUnpack(2, type = 'b') # read 2 bytes to set up next jump
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atell = SOSfile.tell()
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SOSfile.seek(rel_offset,1) # jump (2 of 2) distance found in previous two bytes
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atell = SOSfile.tell()
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rel_offset = readUnpack(2, type = 'b') # we're now at the comment_len of a new major driver; read two bytes for length
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atell = SOSfile.tell()
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for i in range(0,len(drivers_list)): # begin loop to grab information from DIB
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SOSfile.seek(drivers_list[i]['location'],0) # reference SOF and seek to beginning of major driver
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SOSfile.seek(drivers_list[i]['comment_start'],0) # reference SOF and seek to beginning of major driver
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comment_len = readUnpack(2, type = 'b') # grab comment length (2 bytes)
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drivers_list[i]['comment_len'] = comment_len # store comment length
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if comment_len != 0: # if comment length is not 0000
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if comment_len != 0x0000: # if comment length is not 0000
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comment_txt = readUnpack(comment_len, type = 't') # comment_len bytes as text
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drivers_list[i]['comment_txt'] = comment_txt # place comment in dictionary
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else:
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drivers_list[i]['comment_txt'] = '' # else enter comment as nothing
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else: # otherwise...
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drivers_list[i]['comment_txt'] = 'None' # else enter comment as nothing
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SOSfile.seek(2,1) # skip two bytes immediately following comment or 0000
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drivers_list[i]['dib_start'] = SOSfile.tell()
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link_ptr = readUnpack(2, type = 'b') # grab link pointer
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drivers_list[i]['link_ptr'] = link_ptr # store link pointer
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entry = readUnpack(2, type = 'b') # grab entry field
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@ -139,25 +140,21 @@ for i in range(0,len(drivers_list)): # begin
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Q = nibblize(ver_byte0, direction = 'low') # grab qualifier number. We only care about A (Alpha), B (Beta), or E (Experimental)
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drivers_list[i]['version'] = V + '.' + v0 + v1 + Q # put version number into dictionary
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for i in range(0,len(drivers_list)): # begin search for sub-drivers
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for i in range(0,len(drivers_list)): # begin search for how many devices a driver can support
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link_ptr = drivers_list[i]['link_ptr'] # grab link_ptr in dictionary
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if link_ptr != 0x0000: # is link_ptr not 0x0000?
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sub_drivers = 0 # initialize sub-driver count (initially 0)
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sub_loop = True # setup loop for running through a driver with subs
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while sub_loop : # begin loop
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SOSfile.seek(drivers_list[i]['location'],0) # reference SOF and seek to beginning of major driver
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jump_distance = 4 + drivers_list[i]['comment_len'] \
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+ drivers_list[i]['link_ptr'] # calculate distance needed to reach first sub-DIB
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SOSfile.seek(jump_distance,1) # seek to beginning of sub-DIB
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sub_sub_loop = True # setup loop to run through sub-drivers
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while sub_sub_loop: # begin loop to move only through sub-
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sub_link = readUnpack(2, type = 'b') # read link field of sub-driver
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if sub_link != 0x0000: # if link field is not zero...
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sub_drivers = sub_drivers + 1 # increment sub_drivers count
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SOSfile.seek(32,1) # seek to next sub-DIB ($22 bytes minus link field)
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if sub_link == 0x0000: # if link field is 0x0000
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sub_sub_loop = False # set inner loop to false
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sub_loop = False # set sub-driver loop to false
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drivers_list[i]['sub_drivers'] = sub_drivers # place total number in dictionary
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# here we continue iterating through major drivers
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total_devs = 1 # initialize devices count (initially 1)
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SOSfile.seek(drivers_list[i]['dib_start'],0) # seek to beginning of major driver from start of file
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SOSfile.seek(drivers_list[i]['link_ptr'],1) # seek to beginning of sub-DIB
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sub_loop = True # setup loop to run through sub-drivers
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while sub_loop: # begin loop to move only through sub-
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sub_link = readUnpack(2, type = 'b') # read link field of sub-driver
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if sub_link != 0x0000: # if link field is not zero...
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total_devs = total_devs + 1 # increment sub_drivers count
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SOSfile.seek(32,1) # seek to next sub-DIB ($22 bytes minus link field)
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else: # else...
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sub_loop = False # set inner loop to false # set sub-driver loop to false
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drivers_list[i]['num_devices'] = total_devs # place total number in dictionary
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print drivers_list[4]
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SOSfile.close()
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