cryptonas/plugins/partition/root_action.py

#!/usr/bin/env python
#
# Copyright 2006 sense.lab e.V.
# 
# This file is part of the CryptoBox.
#
# The CryptoBox 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 2 of the License, or
# (at your option) any later version.
# 
# The CryptoBox 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 the CryptoBox; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#

__revision__ = "$Id$"


## necessary: otherwise CryptoBoxRootActions.py will refuse to execute this script
PLUGIN_TYPE = "cryptobox"

SFDISK_BIN = "/sbin/sfdisk"
MKFS_BIN = "/sbin/mkfs"
LABEL_BIN = "/sbin/e2label"

import subprocess
import re
import sys
import os


def __partitionDevice(device):
    ## do not use the "-q" flag, as this spoils the exit code of sfdisk (seems to be a bug)
    proc = subprocess.Popen(
        shell	= False,
        args	= [
            SFDISK_BIN,
            "-uM",
            device])
    proc.wait()
    return proc.returncode == 0


def __formatPartition(device, type):
    import time, threading
    result = True
    def formatting():
        proc = subprocess.Popen(
            shell	= False,
            stdin	= subprocess.PIPE,
            stdout	= subprocess.PIPE,
            stderr	= subprocess.PIPE,
            args	= [
                MKFS_BIN,
                "-t", type,
                device])
        proc.wait()
        ## TODO: very ugly way of communication: it assumes, that failures are fast - success is slow
        if proc.returncode == 0:
            time.sleep(1)
            return True
        else:
            return False
    thread = threading.Thread()
    thread.setDaemon(True)
    thread.run = formatting
    thread.start()
    time.sleep(0.5)
    return thread.isAlive()


def __labelPartition(device, label):
    proc = subprocess.Popen(
        shell	= False,
        args	= [
            LABEL_BIN,
            device,
            label])
    proc.wait()
    return proc.returncode == 0


if __name__ == "__main__":
    args = sys.argv[1:]

    self_bin =sys.argv[0]
    
    if len(args) == 0:
        sys.stderr.write("%s: no argument supplied\n" % self_bin)
        sys.exit(1)

    try:
        if args[0] == "partition":
            if len(args) != 2: raise "InvalidArgNum"
            result = __partitionDevice(args[1])
        elif args[0] == "format":
            if len(args) != 3: raise "InvalidArgNum"
            result = __formatPartition(args[1], args[2])
        elif args[0] == "label":
            if len(args) != 3: raise "InvalidArgNum"
            result = __labelPartition(args[1], args[2])
        else:
            sys.stderr.write("%s: invalid action (%s)\n" % (self_bin, args[0]))
            sys.exit(1)
        if result:
            sys.exit(0)
        else:
            sys.exit(1)
    except "InvalidArgNum":
        sys.stderr.write("%s: invalid number of arguments (%s)\n" % (self_bin, args))
        sys.exit(1)