projects / OpenSPARC-T2-SAM / blame
| Commit | Line | Data |
|---|---|---|
| 920dae64 AT |
1 | """An object-oriented interface to .netrc files.""" |
| 2 | ||
| 3 | # Module and documentation by Eric S. Raymond, 21 Dec 1998 | |
| 4 | ||
| 5 | import os, shlex | |
| 6 | ||
| 7 | __all__ = ["netrc", "NetrcParseError"] | |
| 8 | ||
| 9 | ||
| 10 | class NetrcParseError(Exception): | |
| 11 | """Exception raised on syntax errors in the .netrc file.""" | |
| 12 | def __init__(self, msg, filename=None, lineno=None): | |
| 13 | self.filename = filename | |
| 14 | self.lineno = lineno | |
| 15 | self.msg = msg | |
| 16 | Exception.__init__(self, msg) | |
| 17 | ||
| 18 | def __str__(self): | |
| 19 | return "%s (%s, line %s)" % (self.msg, self.filename, self.lineno) | |
| 20 | ||
| 21 | ||
| 22 | class netrc: | |
| 23 | def __init__(self, file=None): | |
| 24 | if file is None: | |
| 25 | try: | |
| 26 | file = os.path.join(os.environ['HOME'], ".netrc") | |
| 27 | except KeyError: | |
| 28 | raise IOError("Could not find .netrc: $HOME is not set") | |
| 29 | fp = open(file) | |
| 30 | self.hosts = {} | |
| 31 | self.macros = {} | |
| 32 | lexer = shlex.shlex(fp) | |
| 33 | lexer.wordchars += r"""!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~""" | |
| 34 | while 1: | |
| 35 | # Look for a machine, default, or macdef top-level keyword | |
| 36 | toplevel = tt = lexer.get_token() | |
| 37 | if not tt: | |
| 38 | break | |
| 39 | elif tt == 'machine': | |
| 40 | entryname = lexer.get_token() | |
| 41 | elif tt == 'default': | |
| 42 | entryname = 'default' | |
| 43 | elif tt == 'macdef': # Just skip to end of macdefs | |
| 44 | entryname = lexer.get_token() | |
| 45 | self.macros[entryname] = [] | |
| 46 | lexer.whitespace = ' \t' | |
| 47 | while 1: | |
| 48 | line = lexer.instream.readline() | |
| 49 | if not line or line == '\012': | |
| 50 | lexer.whitespace = ' \t\r\n' | |
| 51 | break | |
| 52 | self.macros[entryname].append(line) | |
| 53 | continue | |
| 54 | else: | |
| 55 | raise NetrcParseError( | |
| 56 | "bad toplevel token %r" % tt, file, lexer.lineno) | |
| 57 | ||
| 58 | # We're looking at start of an entry for a named machine or default. | |
| 59 | login = '' | |
| 60 | account = password = None | |
| 61 | self.hosts[entryname] = {} | |
| 62 | while 1: | |
| 63 | tt = lexer.get_token() | |
| 64 | if (tt=='' or tt == 'machine' or | |
| 65 | tt == 'default' or tt =='macdef'): | |
| 66 | if password: | |
| 67 | self.hosts[entryname] = (login, account, password) | |
| 68 | lexer.push_token(tt) | |
| 69 | break | |
| 70 | else: | |
| 71 | raise NetrcParseError( | |
| 72 | "malformed %s entry %s terminated by %s" | |
| 73 | % (toplevel, entryname, repr(tt)), | |
| 74 | file, lexer.lineno) | |
| 75 | elif tt == 'login' or tt == 'user': | |
| 76 | login = lexer.get_token() | |
| 77 | elif tt == 'account': | |
| 78 | account = lexer.get_token() | |
| 79 | elif tt == 'password': | |
| 80 | password = lexer.get_token() | |
| 81 | else: | |
| 82 | raise NetrcParseError("bad follower token %r" % tt, | |
| 83 | file, lexer.lineno) | |
| 84 | ||
| 85 | def authenticators(self, host): | |
| 86 | """Return a (user, account, password) tuple for given host.""" | |
| 87 | if host in self.hosts: | |
| 88 | return self.hosts[host] | |
| 89 | elif 'default' in self.hosts: | |
| 90 | return self.hosts['default'] | |
| 91 | else: | |
| 92 | return None | |
| 93 | ||
| 94 | def __repr__(self): | |
| 95 | """Dump the class data in the format of a .netrc file.""" | |
| 96 | rep = "" | |
| 97 | for host in self.hosts.keys(): | |
| 98 | attrs = self.hosts[host] | |
| 99 | rep = rep + "machine "+ host + "\n\tlogin " + repr(attrs[0]) + "\n" | |
| 100 | if attrs[1]: | |
| 101 | rep = rep + "account " + repr(attrs[1]) | |
| 102 | rep = rep + "\tpassword " + repr(attrs[2]) + "\n" | |
| 103 | for macro in self.macros.keys(): | |
| 104 | rep = rep + "macdef " + macro + "\n" | |
| 105 | for line in self.macros[macro]: | |
| 106 | rep = rep + line | |
| 107 | rep = rep + "\n" | |
| 108 | return rep | |
| 109 | ||
| 110 | if __name__ == '__main__': | |
| 111 | print netrc() |