This file is indexed.

/usr/bin/btmakemetafile.bittorrent is in bittorrent 3.4.2-11.3ubuntu2.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
#! /usr/bin/python

# Written by Bram Cohen
# see LICENSE.txt for license information

from sys import argv
from os.path import getsize, split, join, abspath, isdir
from os import listdir
from sha import sha
from copy import copy
from string import strip
from BitTorrent.bencode import bencode
from BitTorrent.btformats import check_info
from BitTorrent.parseargs import parseargs, formatDefinitions
from threading import Event
from time import time

defaults = [
    ('piece_size_pow2', 18,
        "which power of 2 to set the piece size to"),
    ('comment', '',
        "optional human-readable comment to put in .torrent"),
    ('target', '',
        "optional target file for the torrent")
    ]

ignore = ['core', 'CVS']

def dummy(v):
    pass

def make_meta_file(file, url, piece_len_exp = 18, 
        flag = Event(), progress = dummy, progress_percent=1, comment = None, target = None):
    if piece_len_exp == None:
        piece_len_exp = 18
    piece_length = 2 ** piece_len_exp
    a, b = split(file)
    if not target:
        if b == '':
            f = a + '.torrent'
        else:
            f = join(a, b + '.torrent')
    else:
        f = target
    info = makeinfo(file, piece_length, flag, progress, progress_percent)
    if flag.isSet():
        return
    check_info(info)
    h = open(f, 'wb')
    data = {'info': info, 'announce': strip(url), 'creation date': long(time())}
    if comment:
        data['comment'] = comment
    h.write(bencode(data))
    h.close()

def calcsize(file):
    if not isdir(file):
        return getsize(file)
    total = 0
    for s in subfiles(abspath(file)):
        total += getsize(s[1])
    return total

def makeinfo(file, piece_length, flag, progress, progress_percent=1):
    file = abspath(file)
    if isdir(file):
        subs = subfiles(file)
        subs.sort()
        pieces = []
        sh = sha()
        done = 0
        fs = []
        totalsize = 0.0
        totalhashed = 0
        for p, f in subs:
            totalsize += getsize(f)

        for p, f in subs:
            pos = 0
            size = getsize(f)
            fs.append({'length': size, 'path': p})
            h = open(f, 'rb')
            while pos < size:
                a = min(size - pos, piece_length - done)
                sh.update(h.read(a))
                if flag.isSet():
                    return
                done += a
                pos += a
                totalhashed += a
                
                if done == piece_length:
                    pieces.append(sh.digest())
                    done = 0
                    sh = sha()
                if progress_percent:
                    progress(totalhashed / totalsize)
                else:
                    progress(a)
            h.close()
        if done > 0:
            pieces.append(sh.digest())
        return {'pieces': ''.join(pieces),
            'piece length': piece_length, 'files': fs, 
            'name': split(file)[1]}
    else:
        size = getsize(file)
        pieces = []
        p = 0
        h = open(file, 'rb')
        while p < size:
            x = h.read(min(piece_length, size - p))
            if flag.isSet():
                return
            pieces.append(sha(x).digest())
            p += piece_length
            if p > size:
                p = size
            if progress_percent:
                progress(float(p) / size)
            else:
                progress(min(piece_length, size - p))
        h.close()
        return {'pieces': ''.join(pieces), 
            'piece length': piece_length, 'length': size, 
            'name': split(file)[1]}

def subfiles(d):
    r = []
    stack = [([], d)]
    while len(stack) > 0:
        p, n = stack.pop()
        if isdir(n):
            for s in listdir(n):
                if s not in ignore and s[:1] != '.':
                    stack.append((copy(p) + [s], join(n, s)))
        else:
            r.append((p, n))
    return r

def prog(amount):
    print '%.1f%% complete\r' % (amount * 100),

if __name__ == '__main__':
    if len(argv) < 3:
        print 'usage is -'
        print argv[0] + ' file trackerurl [params]'
        print
        print formatDefinitions(defaults, 80)
    else:
        try:
            config, args = parseargs(argv[3:], defaults, 0, 0)
            make_meta_file(argv[1], argv[2], config['piece_size_pow2'], progress = prog,
                comment = config['comment'], target = config['target'])
        except ValueError, e:
            print 'error: ' + str(e)
            print 'run with no args for parameter explanations'