1 # Copyright 2012 GRNET S.A. All rights reserved.
3 # Redistribution and use in source and binary forms, with or
4 # without modification, are permitted provided that the following
7 # 1. Redistributions of source code must retain the above
8 # copyright notice, this list of conditions and the following
11 # 2. Redistributions in binary form must reproduce the above
12 # copyright notice, this list of conditions and the following
13 # disclaimer in the documentation and/or other materials
14 # provided with the distribution.
16 # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
17 # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
20 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
24 # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
26 # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 # POSSIBILITY OF SUCH DAMAGE.
29 # The views and conclusions contained in the software and
30 # documentation are those of the authors and should not be
31 # interpreted as representing official policies, either expressed
32 # or implied, of GRNET S.A.
39 class FatalError(Exception):
43 def get_command(command):
44 def find_sbin_command(command, exception):
45 search_paths = ['/usr/local/sbin', '/usr/sbin', '/sbin']
46 for fullpath in map(lambda x: "%s/%s" % (x, command), search_paths):
47 if os.path.exists(fullpath) and os.access(fullpath, os.X_OK):
48 return pbs.Command(fullpath)
52 return pbs.__getattr__(command)
53 except pbs.CommadNotFount as e:
54 return find_sbin_command(command, e)
58 def __init__(self, output):
61 def compute(self, filename, size):
64 BLOCKSIZE = 4 * MB # 4MB
66 prog_size = ((size + MB - 1) // MB) # in MB
67 progressbar = self.out.Progress(prog_size, "Calculating md5sum", 'mb')
69 with open(filename, "r") as src:
72 length = min(left, BLOCKSIZE)
73 data = src.read(length)
76 progressbar.goto((size - left) // MB)
78 checksum = md5.hexdigest()
79 progressbar.success(checksum)
83 # vim: set sta sts=4 shiftwidth=4 sw=4 et ai :