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SickRage/lib/hachoir_parser/file_system/linux_swap.py
echel0n 0d9fbc1ad7 Welcome to our SickBeard-TVRage Edition ...
This version of SickBeard uses both TVDB and TVRage to search and gather it's series data from allowing you to now have access to and download shows that you couldn't before because of being locked into only what TheTVDB had to offer.

Also this edition is based off the code we used in our XEM editon so it does come with scene numbering support as well as all the other features our XEM edition has to offer.

Please before using this with your existing database (sickbeard.db) please make a backup copy of it and delete any other database files such as cache.db and failed.db if present, we HIGHLY recommend starting out with no database files at all to make this a fresh start but the choice is at your own risk!

Enjoy!
2014-03-09 22:39:12 -07:00

115 lines
3.7 KiB
Python

"""
Linux swap file.
Documentation: Linux kernel source code, files:
- mm/swapfile.c
- include/linux/swap.h
Author: Victor Stinner
Creation date: 25 december 2006 (christmas ;-))
"""
from lib.hachoir_parser import Parser
from lib.hachoir_core.field import (ParserError, GenericVector,
UInt32, String,
Bytes, NullBytes, RawBytes)
from lib.hachoir_core.endian import LITTLE_ENDIAN
from lib.hachoir_core.tools import humanFilesize
from lib.hachoir_core.bits import str2hex
PAGE_SIZE = 4096
# Definition of MAX_SWAP_BADPAGES in Linux kernel:
# (__swapoffset(magic.magic) - __swapoffset(info.badpages)) / sizeof(int)
MAX_SWAP_BADPAGES = ((PAGE_SIZE - 10) - 1536) // 4
class Page(RawBytes):
static_size = PAGE_SIZE*8
def __init__(self, parent, name):
RawBytes.__init__(self, parent, name, PAGE_SIZE)
class UUID(Bytes):
static_size = 16*8
def __init__(self, parent, name):
Bytes.__init__(self, parent, name, 16)
def createDisplay(self):
text = str2hex(self.value, format=r"%02x")
return "%s-%s-%s-%s-%s" % (
text[:8], text[8:12], text[12:16], text[16:20], text[20:])
class LinuxSwapFile(Parser):
PARSER_TAGS = {
"id": "linux_swap",
"file_ext": ("",),
"category": "file_system",
"min_size": PAGE_SIZE*8,
"description": "Linux swap file",
"magic": (
("SWAP-SPACE", (PAGE_SIZE-10)*8),
("SWAPSPACE2", (PAGE_SIZE-10)*8),
("S1SUSPEND\0", (PAGE_SIZE-10)*8),
),
}
endian = LITTLE_ENDIAN
def validate(self):
magic = self.stream.readBytes((PAGE_SIZE-10)*8, 10)
if magic not in ("SWAP-SPACE", "SWAPSPACE2", "S1SUSPEND\0"):
return "Unknown magic string"
if MAX_SWAP_BADPAGES < self["nb_badpage"].value:
return "Invalid number of bad page (%u)" % self["nb_badpage"].value
return True
def getPageCount(self):
"""
Number of pages which can really be used for swapping:
number of page minus bad pages minus one page (used for the header)
"""
# -1 because first page is used for the header
return self["last_page"].value - self["nb_badpage"].value - 1
def createDescription(self):
if self["magic"].value == "S1SUSPEND\0":
text = "Suspend swap file version 1"
elif self["magic"].value == "SWAPSPACE2":
text = "Linux swap file version 2"
else:
text = "Linux swap file version 1"
nb_page = self.getPageCount()
return "%s, page size: %s, %s pages" % (
text, humanFilesize(PAGE_SIZE), nb_page)
def createFields(self):
# First kilobyte: boot sectors
yield RawBytes(self, "boot", 1024, "Space for disklabel etc.")
# Header
yield UInt32(self, "version")
yield UInt32(self, "last_page")
yield UInt32(self, "nb_badpage")
yield UUID(self, "sws_uuid")
yield UUID(self, "sws_volume")
yield NullBytes(self, "reserved", 117*4)
# Read bad pages (if any)
count = self["nb_badpage"].value
if count:
if MAX_SWAP_BADPAGES < count:
raise ParserError("Invalid number of bad page (%u)" % count)
yield GenericVector(self, "badpages", count, UInt32, "badpage")
# Read magic
padding = self.seekByte(PAGE_SIZE - 10, "padding", null=True)
if padding:
yield padding
yield String(self, "magic", 10, charset="ASCII")
# Read all pages
yield GenericVector(self, "pages", self["last_page"].value, Page, "page")
# Padding at the end
padding = self.seekBit(self.size, "end_padding", null=True)
if padding:
yield padding