3 from bup import options
4 from bup.helpers import *
10 l.append(chr(random.randrange(0,256)))
15 bup damage [-n count] [-s maxsize] [-S seed] <filenames...>
17 WARNING: THIS COMMAND IS EXTREMELY DANGEROUS
18 n,num= number of blocks to damage
19 s,size= maximum size of each damaged block
20 percent= maximum size of each damaged block (as a percent of entire file)
21 equal spread damage evenly throughout the file
22 S,seed= random number seed (for repeatable tests)
24 o = options.Options(optspec)
25 (opt, flags, extra) = o.parse(sys.argv[1:])
28 o.fatal('filenames expected')
34 log('Damaging "%s"...\n' % name)
36 st = os.fstat(f.fileno())
38 if opt.percent or opt.size:
39 ms1 = int(float(opt.percent or 0)/100.0*size) or size
40 ms2 = opt.size or size
41 maxsize = min(ms1, ms2)
44 chunks = opt.num or 10
45 chunksize = size/chunks
46 for r in range(chunks):
47 sz = random.randrange(1, maxsize+1)
53 ofs = random.randrange(0, size - sz + 1)
54 log(' %6d bytes at %d\n' % (sz, ofs))
56 f.write(randblock(sz))