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113 lines
4.3 KiB
Python
113 lines
4.3 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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# Name: persistence.py
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# Purpose: Module to deal with persistence of a selected distro.
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# Authors: Sundar
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# Licence: This file is a part of multibootusb package. You can redistribute it or modify
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# under the terms of GNU General Public License, v.2 or above
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import os
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import platform
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import tarfile
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import subprocess
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from . import usb
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from . import iso
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from . import gen
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from . import config
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def max_disk_persistence(usb_disk):
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"""
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Detect max persistence value for filesystem on usb_disk
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:param usb_disk: Disk filesystem to check
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:return: Max persistence supported (bytes)
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"""
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assert usb_disk is not None
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fat_max_size = (4096 * 1024 * 1024)
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usb_details = config.usb_details
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config.usb_uuid = usb_details['uuid']
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config.usb_label = usb_details['label']
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if usb_details['file_system'] in ['vfat', 'FAT32'] and usb_details['size_free'] > fat_max_size:
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_max_size = fat_max_size
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else:
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_max_size = usb_details['size_free']
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return _max_size
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def persistence_distro(distro, iso_link):
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"""
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Function to detect if distro can have persistence option.
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:param distro: Detected distro name.
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:return: Distro name as string or None otherwise.
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"""
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assert distro is not None
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assert iso_link is not None
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iso_size = iso.iso_size(iso_link)
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if distro in ["ubuntu", "debian", "debian-install", "fedora"]:
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gen.log("Persistence option is available.")
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return distro
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else:
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return None
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def create_persistence():
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if config.distro == "ubuntu":
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fs_name = 'casper-rw'
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elif config.distro == 'debian' or config.distro == "debian-install":
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fs_name = 'live-rw'
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elif config.distro == 'fedora':
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fs_name = 'overlay-' + config.usb_label + '-' + config.usb_uuid
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persistence = config.persistence / 1024 / 1024
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if platform.system() == 'Linux':
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mkfs = 'mkfs.ext3'
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dd = 'dd'
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persistence_mkfs_cmd = mkfs + ' -F ' + gen.quote(os.path.join(config.usb_mount, 'multibootusb',
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iso.iso_basename(config.image_path),
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fs_name))
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elif platform.system() == 'Windows':
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mkfs = gen.quote(gen.resource_path(os.path.join("data", "tools", "mkfs", "mke2fs.exe")))
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dd = gen.quote(gen.resource_path(os.path.join("data", "tools", "dd", "dd.exe")))
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persistence_mkfs_cmd = 'echo y|' + mkfs + ' -b 1024 -L ' + fs_name + ' ' + gen.quote(os.path.join(config.usb_mount, 'multibootusb',
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iso.iso_basename(config.image_path), fs_name))
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if config.distro == 'fedora':
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persistence_dd_cmd = dd + ' if=/dev/zero ' \
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'of=' + gen.quote(os.path.join(config.usb_mount, 'multibootusb',
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iso.iso_basename(config.image_path), 'LiveOS', fs_name)) + \
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' bs=1M count=' + str(int(persistence))
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else:
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persistence_dd_cmd = dd + ' if=/dev/zero of=' + gen.quote(os.path.join(config.usb_mount, 'multibootusb',
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iso.iso_basename(config.image_path), fs_name)) +\
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' bs=1M count=' + str(int(persistence))
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gen.log('Executing ==>' + persistence_dd_cmd)
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config.status_text = 'Creating persistence file...'
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if subprocess.call(persistence_dd_cmd, shell=True) == 0:
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gen.log("\nSuccessfully created persistence file...\n")
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if config.distro != 'fedora':
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gen.log('Applying filesystem to persistence file...')
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config.status_text = 'Applying filesystem to persistence file. Please wait...'
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gen.log('Executing ==> ' + persistence_mkfs_cmd)
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config.status_text = 'Applying filesystem to persistence file...'
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if subprocess.call(persistence_mkfs_cmd, shell=True) == 0:
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gen.log("\nSuccessfully applied filesystem...\n")
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def extract_file(file_path, install_dir):
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"""
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Function to extract persistence files to distro install directory.
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:param file_path: Path to persistence file.
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:param install_dir: Path to distro install directory.
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:return:
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"""
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tar = tarfile.open(file_path, "r:bz2")
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tar.extractall(install_dir)
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tar.close()
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