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operations.py
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operations.py
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# -*- encoding: utf-8 -*-
import sys, os, threading
import time
import subprocess as SP
class ProcessRunner(object):
def __init__(self):
self.thread = threading.Thread(target=self._work)
self.thread.deamon = True
self.running = True
self.p = None
self.queue = []
def start(self, cmd):
assert( isinstance(cmd, (list, tuple)) )
self.p = SP.Popen(cmd, stdout=SP.PIPE)
self.thread.start()
def _work(self):
while self.running:
line = self.p.stdout.readline()
if line != '':
self.queue.append(line)
else:
if self.p.poll() != None:
#print "Process done"
self.running = False
#time.sleep(0.010)
def stop(self):
self.running = False
self.thread.join()
def ended(self):
self.p.poll()
return (self.p.returncode != None) and (not self.running)
def has_line(self):
return len(self.queue) > 0
def get_line(self):
return self.queue.pop(0)
def returncode(self):
return self.p.returncode
class Operations(object):
def create_btrfs(self, device, label):
assert( isinstance(device, basestring) )
assert( device.startswith('/dev/') )
cmd = ('mkfs.btrfs', '-L%s'%label, str(device))
ok, ret = self._call(cmd)
if ok:
lines = ret.split('\n')
ret = [x for x in lines if x.startswith('fs created')]
return ret[0]
else:
return False
def mkdir_mountpoint(self, mountpoint):
assert( isinstance(mountpoint, basestring) )
cmd = ('mkdir', '%s'%mountpoint)
ok, ret = self._call(cmd)
return ok
def mount_backup(self, device, directory):
assert( isinstance(device, basestring) )
assert( device.startswith('/dev/') )
cmd = ('mount','-tbtrfs','-ogroup,compress=lzo,user_subvol_rm_allowed,autodefrag,inode_cache',
device, directory)
ok, ret = self._call(cmd)
return ok
def create_subvol(self, sub_dir):
cmd = ('/sbin/btrfs', 'subvolume', 'create', sub_dir)
ok, ret = self._call(cmd)
#if not ok parent directory was probably not a btrfs
return ok
def unmount_backup(self, device):
assert( isinstance(device, basestring) )
assert( device.startswith('/dev/') )
cmd = ('umount', device)
ok, ret = self._call(cmd)
return ok
def create_snapshot(self, source_dir, dest_dir):
cmd = ('/sbin/btrfs', 'subvolume', 'snapshot', source_dir, dest_dir)
ok, ret = self._call(cmd)
if ok and ret.startswith('Create'):
return True
else:
print ret
return False
def delete_snapshot(self, snapshot_dir):
print "Deleting: %s"%snapshot_dir
cmd = ('/sbin/btrfs', 'subvolume', 'delete', snapshot_dir)
ok, ret = self._call(cmd)
return ok
def sync_dryrun(self, source_dir, dest_dir):
#erst --dry-run zum berechnen des gesamtfortschritts und dann ohne
excludes = ('foo', 'bar')
excludes = ['--exclude=%s'%x for x in excludes]
cmd = ['rsync','-avzpHAX','--skip-compress=jpg:mpg:avi:mp3',
'--one-file-system',
'--inplace',
'--delete',
'--delete-excluded',
'--exclude=backup',
'--dry-run',
source_dir,
dest_dir,
]
cmd.extend( excludes )
ok, ret = self._call(cmd)
ret = ret.split('\n')
return ok, len(ret)
def sync_data(self, source_dir, dest_dir, progress_func):
excludes = ('backup', 'bar')
excludes = ['--exclude=%s'%x for x in excludes]
cmd = ['rsync','-avzpHAX','--skip-compress=jpg:mpg:avi:mp3',
'--one-file-system',
'--inplace',
'--delete',
'--delete-excluded',
'--exclude=backup',
source_dir,
dest_dir,
]
cmd.extend( excludes )
pr = ProcessRunner()
pr.start(cmd)
progress = 0
while not pr.ended():
while pr.has_line():
progress_func(progress)
line = pr.get_line()
#print line
progress += 1
time.sleep(0.020)
return pr.returncode() == 0
def _call(self, cmd):
p = SP.Popen(cmd, stdout=SP.PIPE)
ret = p.communicate()[0]
return ((p.returncode == 0), ret)