2Shirt
e56296d8b0
* Common code moved to select_device() * Existing select_device() renamed menu_select_device() * Fixed skip_device code * Refactored source/dest vars into dicts * Added confirmation after source/dest are selected
240 lines
7.2 KiB
Python
240 lines
7.2 KiB
Python
# Wizard Kit: Functions - ddrescue
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import json
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import pathlib
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import re
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from functions.common import *
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from operator import itemgetter
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# STATIC VARIABLES
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USAGE=""" {script_name} clone [source [destination]]
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{script_name} image [source [destination]]
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(e.g. {script_name} clone /dev/sda /dev/sdb)
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"""
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# Functions
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def show_device_details(dev_path):
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"""Display device details on screen."""
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cmd = (
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'lsblk', '--nodeps',
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'--output', 'NAME,TRAN,TYPE,SIZE,VENDOR,MODEL,SERIAL',
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dev_path)
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result = run_program(cmd)
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output = result.stdout.decode().splitlines()
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print_info(output.pop(0))
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for line in output:
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print_standard(line)
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# Children info
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cmd = ('lsblk', '--output', 'NAME,SIZE,FSTYPE,LABEL,MOUNTPOINT', dev_path)
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result = run_program(cmd)
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output = result.stdout.decode().splitlines()
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print_info(output.pop(0))
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for line in output:
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print_standard(line)
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def get_device_details(dev_path):
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"""Get device details via lsblk, returns JSON dict."""
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try:
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cmd = (
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'lsblk',
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'--json',
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'--output-all',
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'--paths',
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dev_path)
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result = run_program(cmd)
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except CalledProcessError:
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print_error('Failed to get device details for {}'.format(dev_path))
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abort()
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json_data = json.loads(result.stdout.decode())
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# Just return the first device (there should only be one)
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return json_data['blockdevices'][0]
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def setup_loopback_device(source_path):
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"""Setup a loopback device for source_path, returns dev_path as str."""
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cmd = (
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'losetup',
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'--find',
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'--partscan',
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'--show',
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source_path)
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try:
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out = run_program(cmd, check=True)
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dev_path = out.stdout.decode().strip()
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sleep(1)
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except CalledProcessError:
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print_error('Failed to setup loopback device for source.')
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abort()
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else:
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return dev_path
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def menu_clone(source_path, dest_path):
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"""ddrescue cloning menu."""
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source_is_image = False
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source_dev_path = None
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print_success('GNU ddrescue: Cloning Menu')
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# Set devices
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source = select_device('source', source_path)
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dest = select_device('destination', dest_path,
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skip_device = source['Details'], allow_image_file = False)
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# Show selection details
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clear_screen()
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print_success('Source device')
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if source['Is Image']:
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print_standard('Using image file: {}'.format(source['Path']))
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print_standard(' (via loopback device: {})'.format(
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source['Dev Path']))
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show_device_details(source['Dev Path'])
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print_standard(' ')
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print_success('Destination device ', end='')
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print_error('(ALL DATA WILL BE DELETED)', timestamp=False)
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show_device_details(dest['Dev Path'])
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print_standard(' ')
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# Confirm
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if not ask('Proceed with clone?'):
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abort()
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# Build outer panes
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clear_screen()
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#TODO
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def menu_ddrescue(*args):
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"""Main ddrescue loop/menu."""
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args = list(args)
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script_name = os.path.basename(args.pop(0))
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run_mode = ''
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source_path = None
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dest_path = None
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# Parse args
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try:
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run_mode = args.pop(0)
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source_path = args.pop(0)
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dest_path = args.pop(0)
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except IndexError:
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# We'll set the missing paths later
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pass
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# Show proper menu or exit
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if run_mode == 'clone':
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menu_clone(source_path, dest_path)
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elif run_mode == 'image':
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menu_image(source_path, dest_path)
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else:
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if not re.search(r'(^$|help|-h|\?)', run_mode, re.IGNORECASE):
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print_error('Invalid mode.')
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show_usage(script_name)
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exit_script()
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def menu_image(source_path, dest_path):
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"""ddrescue imaging menu."""
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print_success('GNU ddrescue: Imaging Menu')
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pass
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def select_device(description='device', provided_path=None,
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skip_device={}, allow_image_file=True):
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"""Select device via provided path or menu, return dev as dict."""
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dev = {'Is Image': False}
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# Set path
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if provided_path:
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dev['Path'] = provided_path
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else:
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dev['Path'] = menu_select_device(
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title='Please select a {}'.format(description),
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skip_device=skip_device)
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dev['Path'] = os.path.realpath(dev['Path'])
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# Check path
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if pathlib.Path(dev['Path']).is_block_device():
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dev['Dev Path'] = dev['Path']
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elif allow_image_file and pathlib.Path(dev['Path']).is_file():
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dev['Dev Path'] = setup_loopback_device(dev['Path'])
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dev['Is Image'] = True
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else:
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print_error('Invalid {} "{}".'.format(description, dev['Path']))
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abort()
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# Get device details
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dev['Details'] = get_device_details(dev['Dev Path'])
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# Check for parent device(s)
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while dev['Details']['pkname']:
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print_warning('{} "{}" is a child device.'.format(
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description.title(), dev['Dev Path']))
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if ask('Use parent device "{}" instead?'.format(
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dev['Details']['pkname'])):
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# Update dev with parent info
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dev['Dev Path'] = dev['Details']['pkname']
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dev['Details'] = get_device_details(dev['Dev Path'])
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else:
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# Leave alone
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break
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return dev
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def menu_select_device(title='Which device?', skip_device={}):
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"""Select block device via a menu, returns dev_path as str."""
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skip_names = [
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skip_device.get('name', None), skip_device.get('pkname', None)]
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skip_names = [n for n in skip_names if n]
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try:
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cmd = (
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'lsblk',
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'--json',
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'--nodeps',
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'--output-all',
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'--paths')
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result = run_program(cmd)
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json_data = json.loads(result.stdout.decode())
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except CalledProcessError:
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print_error('Failed to get device details for {}'.format(dev_path))
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abort()
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# Build menu
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dev_options = []
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for dev in json_data['blockdevices']:
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# Skip if dev is in skip_names
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if dev['name'] in skip_names or dev['pkname'] in skip_names:
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continue
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# Append non-matching devices
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dev_options.append({
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'Name': '{name:12} {tran:5} {size:6} {model} {serial}'.format(
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name = dev['name'],
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tran = dev['tran'] if dev['tran'] else '',
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size = dev['size'] if dev['size'] else '',
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model = dev['model'] if dev['model'] else '',
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serial = dev['serial'] if dev['serial'] else ''),
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'Path': dev['name']})
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dev_options = sorted(dev_options, key=itemgetter('Name'))
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if not dev_options:
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print_error('No devices available.')
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abort()
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# Show Menu
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actions = [{'Name': 'Quit', 'Letter': 'Q'}]
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selection = menu_select(
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title = title,
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main_entries = dev_options,
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action_entries = actions)
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if selection.isnumeric():
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return dev_options[int(selection)-1]['Path']
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elif selection == 'Q':
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abort()
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def show_usage(script_name):
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print_info('Usage:')
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print_standard(USAGE.format(script_name=script_name))
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if __name__ == '__main__':
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print("This file is not meant to be called directly.")
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# vim: sts=4 sw=4 ts=4
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