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Importing options.py, ssh.py, and LICENSE from the bup project.
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+  To apply these terms, attach the following notices to the library.  It is
  448
+safest to attach them to the start of each source file to most effectively
  449
+convey the exclusion of warranty; and each file should have at least the
  450
+"copyright" line and a pointer to where the full notice is found.
  451
+
  452
+    <one line to give the library's name and a brief idea of what it does.>
  453
+    Copyright (C) <year>  <name of author>
  454
+
  455
+    This library is free software; you can redistribute it and/or
  456
+    modify it under the terms of the GNU Library General Public
  457
+    License as published by the Free Software Foundation; either
  458
+    version 2 of the License, or (at your option) any later version.
  459
+
  460
+    This library is distributed in the hope that it will be useful,
  461
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
  462
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  463
+    Library General Public License for more details.
  464
+
  465
+    You should have received a copy of the GNU Library General Public
  466
+    License along with this library; if not, write to the Free
  467
+    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  468
+
  469
+Also add information on how to contact you by electronic and paper mail.
  470
+
  471
+You should also get your employer (if you work as a programmer) or your
  472
+school, if any, to sign a "copyright disclaimer" for the library, if
  473
+necessary.  Here is a sample; alter the names:
  474
+
  475
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the
  476
+  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
  477
+
  478
+  <signature of Ty Coon>, 1 April 1990
  479
+  Ty Coon, President of Vice
  480
+
  481
+That's all there is to it!
2  main.py
... ...
@@ -0,0 +1,2 @@
  1
+#!/usr/bin/env python
  2
+import ssh, options
118  options.py
... ...
@@ -0,0 +1,118 @@
  1
+import sys, textwrap, getopt, re
  2
+
  3
+class OptDict:
  4
+    def __init__(self):
  5
+        self._opts = {}
  6
+
  7
+    def __setitem__(self, k, v):
  8
+        self._opts[k] = v
  9
+        
  10
+    def __getitem__(self, k):
  11
+        return self._opts[k]
  12
+
  13
+    def __getattr__(self, k):
  14
+        return self[k]
  15
+
  16
+
  17
+class Options:
  18
+    def __init__(self, exe, optspec, optfunc=getopt.gnu_getopt):
  19
+        self.exe = exe
  20
+        self.optspec = optspec
  21
+        self.optfunc = optfunc
  22
+        self._aliases = {}
  23
+        self._shortopts = 'h?'
  24
+        self._longopts = ['help']
  25
+        self._hasparms = {}
  26
+        self._usagestr = self._gen_usage()
  27
+        
  28
+    def _gen_usage(self):
  29
+        out = []
  30
+        lines = self.optspec.strip().split('\n')
  31
+        lines.reverse()
  32
+        first_syn = True
  33
+        while lines:
  34
+            l = lines.pop()
  35
+            if l == '--': break
  36
+            out.append('%s: %s\n' % (first_syn and 'usage' or '   or', l))
  37
+            first_syn = False
  38
+        out.append('\n')
  39
+        while lines:
  40
+            l = lines.pop()
  41
+            if l.startswith(' '):
  42
+                out.append('\n%s\n' % l.lstrip())
  43
+            elif l:
  44
+                (flags, extra) = l.split(' ', 1)
  45
+                extra = extra.strip()
  46
+                if flags.endswith('='):
  47
+                    flags = flags[:-1]
  48
+                    has_parm = 1
  49
+                else:
  50
+                    has_parm = 0
  51
+                flagl = flags.split(',')
  52
+                flagl_nice = []
  53
+                for f in flagl:
  54
+                    f_nice = re.sub(r'\W', '_', f)
  55
+                    self._aliases[f] = flagl[0]
  56
+                    self._aliases[f_nice] = flagl[0]
  57
+                    self._hasparms[f] = has_parm
  58
+                    if len(f) == 1:
  59
+                        self._shortopts += f + (has_parm and ':' or '')
  60
+                        flagl_nice.append('-' + f)
  61
+                    else:
  62
+                        assert(not f.startswith('no-')) # supported implicitly
  63
+                        self._longopts.append(f + (has_parm and '=' or ''))
  64
+                        self._longopts.append('no-' + f)
  65
+                        flagl_nice.append('--' + f)
  66
+                flags_nice = ', '.join(flagl_nice)
  67
+                if has_parm:
  68
+                    flags_nice += ' ...'
  69
+                prefix = '    %-20s  ' % flags_nice
  70
+                argtext = '\n'.join(textwrap.wrap(extra, width=70,
  71
+                                                initial_indent=prefix,
  72
+                                                subsequent_indent=' '*28))
  73
+                out.append(argtext + '\n')
  74
+            else:
  75
+                out.append('\n')
  76
+        return ''.join(out).rstrip() + '\n'
  77
+    
  78
+    def usage(self):
  79
+        sys.stderr.write(self._usagestr)
  80
+        sys.exit(97)
  81
+
  82
+    def fatal(self, s):
  83
+        sys.stderr.write('error: %s\n' % s)
  84
+        return self.usage()
  85
+        
  86
+    def parse(self, args):
  87
+        try:
  88
+            (flags,extra) = self.optfunc(args, self._shortopts, self._longopts)
  89
+        except getopt.GetoptError, e:
  90
+            self.fatal(e)
  91
+
  92
+        opt = OptDict()
  93
+        for f in self._aliases.values():
  94
+            opt[f] = None
  95
+        for (k,v) in flags:
  96
+            while k.startswith('-'):
  97
+                k = k[1:]
  98
+            if k in ['h', '?', 'help']:
  99
+                self.usage()
  100
+            if k.startswith('no-'):
  101
+                k = self._aliases[k[3:]]
  102
+                opt[k] = None
  103
+            else:
  104
+                k = self._aliases[k]
  105
+                if not self._hasparms[k]:
  106
+                    assert(v == '')
  107
+                    opt[k] = (opt._opts.get(k) or 0) + 1
  108
+                else:
  109
+                    try:
  110
+                        vv = int(v)
  111
+                        if str(vv) == v:
  112
+                            v = vv
  113
+                    except ValueError:
  114
+                        pass
  115
+                    opt[k] = v
  116
+        for (f1,f2) in self._aliases.items():
  117
+            opt[f1] = opt[f2]
  118
+        return (opt,flags,extra)
32  ssh.py
... ...
@@ -0,0 +1,32 @@
  1
+import os, re, subprocess
  2
+
  3
+def connect(rhost, subcmd):
  4
+    assert(not re.search(r'[^\w-]', subcmd))
  5
+    main_exe = sys.argv[0]
  6
+    nicedir = os.path.split(os.path.abspath(main_exe))[0]
  7
+    nicedir = re.sub(r':', "_", nicedir)
  8
+    if rhost == '-':
  9
+        rhost = None
  10
+    if not rhost:
  11
+        argv = ['sshuttle', subcmd]
  12
+    else:
  13
+        # WARNING: shell quoting security holes are possible here, so we
  14
+        # have to be super careful.  We have to use 'sh -c' because
  15
+        # csh-derived shells can't handle PATH= notation.  We can't
  16
+        # set PATH in advance, because ssh probably replaces it.  We
  17
+        # can't exec *safely* using argv, because *both* ssh and 'sh -c'
  18
+        # allow shellquoting.  So we end up having to double-shellquote
  19
+        # stuff here.
  20
+        escapedir = re.sub(r'([^\w/])', r'\\\\\\\1', nicedir)
  21
+        cmd = r"""
  22
+                   sh -c PATH=%s:'$PATH sshuttle %s'
  23
+               """ % (escapedir, subcmd)
  24
+        argv = ['ssh', rhost, '--', cmd.strip()]
  25
+    def setup():
  26
+        # runs in the child process
  27
+        if not rhost:
  28
+            os.environ['PATH'] = ':'.join([nicedir,
  29
+                                           os.environ.get('PATH', '')])
  30
+        os.setsid()
  31
+    return subprocess.Popen(argv, stdin=subprocess.PIPE, stdout=subprocess.PIPE,
  32
+                            preexec_fn=setup)
1  sshuttle

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