3 bup_python="$(dirname "$0")/bup-python" || exit $?
4 exec "$bup_python" "$0" ${1+"$@"}
8 from __future__ import absolute_import
11 from bup import options
12 from bup.compat import argv_bytes, bytes_from_uint, range
13 from bup.helpers import log
14 from bup.io import path_msg
18 return b''.join(bytes_from_uint(random.randrange(0,256)) for i in range(n))
22 bup damage [-n count] [-s maxsize] [-S seed] <filenames...>
24 WARNING: THIS COMMAND IS EXTREMELY DANGEROUS
25 n,num= number of blocks to damage
26 s,size= maximum size of each damaged block
27 percent= maximum size of each damaged block (as a percent of entire file)
28 equal spread damage evenly throughout the file
29 S,seed= random number seed (for repeatable tests)
31 o = options.Options(optspec)
32 (opt, flags, extra) = o.parse(sys.argv[1:])
35 o.fatal('filenames expected')
41 name = argv_bytes(name)
42 log('Damaging "%s"...\n' % path_msg(name))
43 with open(name, 'r+b') as f:
44 st = os.fstat(f.fileno())
46 if opt.percent or opt.size:
47 ms1 = int(float(opt.percent or 0)/100.0*size) or size
48 ms2 = opt.size or size
49 maxsize = min(ms1, ms2)
52 chunks = opt.num or 10
53 chunksize = size // chunks
54 for r in range(chunks):
55 sz = random.randrange(1, maxsize+1)
61 ofs = random.randrange(0, size - sz + 1)
62 log(' %6d bytes at %d\n' % (sz, ofs))
64 f.write(randblock(sz))