tools/mkbackup.py

   1 #!/usr/bin/python
   2
   3 import os
   4 import sys
   5 import subprocess
   6 import shutil
   7 import tempfile
   8 import re
   9
  10 #dump -0 / -f dump.img && dd if=/dev/zero of=filesystem.img bs=2M count=1000 && losetup /dev/loop0 filesystem.img && mkdir filesystem && mke2fs -j /dev/loop0 && mount -t ext3 /dev/loop0 -o loop filesystem && cd filesystem && restore -r -f ../dump.img && cd ../ && umount filesystem && losetup -d /dev/loop0
  11
  12
  13
  14 def main():
  15     def usage():
  16         sys.exit(1)
  17
  18
  19     def mktmpdir():
  20         tmpdir = tempfile.mkdtemp()
  21         return tmpdir
  22
  23     def mktmpfile():
  24         tmpfile = tempfile.mkstemp()
  25         return tmpfile[1]
  26
  27     def size(ent):
  28         current = os.stat(ent).st_size
  29         return current
  30
  31     def mkempty(bs, count):
  32         image = tempfile.mkstemp()
  33         args = ("/bin/dd", "if=/dev/zero", "of=%s"%image, "bs=%s"%bs, "count=%s"%count)
  34         execute(args)
  35         return image
  36
  37     def dump(ent, file):
  38         args = ("/sbin/dump", "-0", ent, "-f", file)
  39         execute(args)
  40
  41     def restore():
  42         pass
  43
  44
  45     def mkcopy():
  46         pass
  47
  48     def getrootents():
  49         ents = list()
  50         args = ("/bin/df", "-lh")
  51         data = execute(args, needdata=True)
  52         lines = data.split('\n')
  53
  54         for line in lines:
  55             if re.search(r"/dev/", line) and not re.search(r"tmpfs", line):
  56                 ent = re.search(r"/dev/[-0-9A-Za-z]+", line)
  57                 ents.append(ent.group())
  58         return ents
  59
  60
  61
  62
  63     def execute(args, needdata=False):
  64         if needdata is False:
  65             rc = subprocess.call(args)
  66         else:
  67             rc = subprocess.Popen(args, stdout=subprocess.PIPE).communicate()[0]
  68
  69         return rc
  70
  71
  72     def setup():
  73
  74         dumpfiles = list()
  75         ents = getrootents()
  76         for ent in ents:
  77             dumpfile = mktmpfile()
  78             dump(ent, dumpfile)
  79             dumpfiles.append(dumpfile)
  80
  81         tsize = 0
  82         for dumpfile in dumpfiles:
  83             tsize = size(dumpfile) + tsize
  84
  85         bs = 2048
  86         count = (tsize / 2048)
  87
  88         target = mkempty(bs, count)
  89
  90     setup()
  91     rc = 0
  92     return rc
  93
  94
  95
  96
  97
  98 if __name__ == "__main__":
  99     sys.exit(main())