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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
|
# Net::Netrc.pm
#
# Copyright (c) 1995-1998 Graham Barr <gbarr@pobox.com>. All rights reserved.
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
package Net::Netrc;
use Carp;
use strict;
use FileHandle;
use vars qw($VERSION);
$VERSION = "2.12";
my %netrc = ();
sub _readrc {
my $host = shift;
my ($home, $file);
if ($^O eq "MacOS") {
$home = $ENV{HOME} || `pwd`;
chomp($home);
$file = ($home =~ /:$/ ? $home . "netrc" : $home . ":netrc");
}
else {
# Some OS's don't have `getpwuid', so we default to $ENV{HOME}
$home = eval { (getpwuid($>))[7] } || $ENV{HOME};
$home ||= $ENV{HOMEDRIVE} . ($ENV{HOMEPATH} || '') if defined $ENV{HOMEDRIVE};
$file = $home . "/.netrc";
}
my ($login, $pass, $acct) = (undef, undef, undef);
my $fh;
local $_;
$netrc{default} = undef;
# OS/2 and Win32 do not handle stat in a way compatable with this check :-(
unless ($^O eq 'os2'
|| $^O eq 'MSWin32'
|| $^O eq 'MacOS'
|| $^O =~ /^cygwin/)
{
my @stat = stat($file);
if (@stat) {
if ($stat[2] & 077) {
carp "Bad permissions: $file";
return;
}
if ($stat[4] != $<) {
carp "Not owner: $file";
return;
}
}
}
if ($fh = FileHandle->new($file, "r")) {
my ($mach, $macdef, $tok, @tok) = (0, 0);
while (<$fh>) {
undef $macdef if /\A\n\Z/;
if ($macdef) {
push(@$macdef, $_);
next;
}
s/^\s*//;
chomp;
while (length && s/^("((?:[^"]+|\\.)*)"|((?:[^\\\s]+|\\.)*))\s*//) {
(my $tok = $+) =~ s/\\(.)/$1/g;
push(@tok, $tok);
}
TOKEN:
while (@tok) {
if ($tok[0] eq "default") {
shift(@tok);
$mach = bless {};
$netrc{default} = [$mach];
next TOKEN;
}
last TOKEN
unless @tok > 1;
$tok = shift(@tok);
if ($tok eq "machine") {
my $host = shift @tok;
$mach = bless {machine => $host};
$netrc{$host} = []
unless exists($netrc{$host});
push(@{$netrc{$host}}, $mach);
}
elsif ($tok =~ /^(login|password|account)$/) {
next TOKEN unless $mach;
my $value = shift @tok;
# Following line added by rmerrell to remove '/' escape char in .netrc
$value =~ s/\/\\/\\/g;
$mach->{$1} = $value;
}
elsif ($tok eq "macdef") {
next TOKEN unless $mach;
my $value = shift @tok;
$mach->{macdef} = {}
unless exists $mach->{macdef};
$macdef = $mach->{machdef}{$value} = [];
}
}
}
$fh->close();
}
}
sub lookup {
my ($pkg, $mach, $login) = @_;
_readrc()
unless exists $netrc{default};
$mach ||= 'default';
undef $login
if $mach eq 'default';
if (exists $netrc{$mach}) {
if (defined $login) {
my $m;
foreach $m (@{$netrc{$mach}}) {
return $m
if (exists $m->{login} && $m->{login} eq $login);
}
return undef;
}
return $netrc{$mach}->[0];
}
return $netrc{default}->[0]
if defined $netrc{default};
return undef;
}
sub login {
my $me = shift;
exists $me->{login}
? $me->{login}
: undef;
}
sub account {
my $me = shift;
exists $me->{account}
? $me->{account}
: undef;
}
sub password {
my $me = shift;
exists $me->{password}
? $me->{password}
: undef;
}
sub lpa {
my $me = shift;
($me->login, $me->password, $me->account);
}
1;
__END__
=head1 NAME
Net::Netrc - OO interface to users netrc file
=head1 SYNOPSIS
use Net::Netrc;
$mach = Net::Netrc->lookup('some.machine');
$login = $mach->login;
($login, $password, $account) = $mach->lpa;
=head1 DESCRIPTION
C<Net::Netrc> is a class implementing a simple interface to the .netrc file
used as by the ftp program.
C<Net::Netrc> also implements security checks just like the ftp program,
these checks are, first that the .netrc file must be owned by the user and
second the ownership permissions should be such that only the owner has
read and write access. If these conditions are not met then a warning is
output and the .netrc file is not read.
=head1 THE .netrc FILE
The .netrc file contains login and initialization information used by the
auto-login process. It resides in the user's home directory. The following
tokens are recognized; they may be separated by spaces, tabs, or new-lines:
=over 4
=item machine name
Identify a remote machine name. The auto-login process searches
the .netrc file for a machine token that matches the remote machine
specified. Once a match is made, the subsequent .netrc tokens
are processed, stopping when the end of file is reached or an-
other machine or a default token is encountered.
=item default
This is the same as machine name except that default matches
any name. There can be only one default token, and it must be
after all machine tokens. This is normally used as:
default login anonymous password user@site
thereby giving the user automatic anonymous login to machines
not specified in .netrc.
=item login name
Identify a user on the remote machine. If this token is present,
the auto-login process will initiate a login using the
specified name.
=item password string
Supply a password. If this token is present, the auto-login
process will supply the specified string if the remote server
requires a password as part of the login process.
=item account string
Supply an additional account password. If this token is present,
the auto-login process will supply the specified string
if the remote server requires an additional account password.
=item macdef name
Define a macro. C<Net::Netrc> only parses this field to be compatible
with I<ftp>.
=back
=head1 CONSTRUCTOR
The constructor for a C<Net::Netrc> object is not called new as it does not
really create a new object. But instead is called C<lookup> as this is
essentially what it does.
=over 4
=item lookup ( MACHINE [, LOGIN ])
Lookup and return a reference to the entry for C<MACHINE>. If C<LOGIN> is given
then the entry returned will have the given login. If C<LOGIN> is not given then
the first entry in the .netrc file for C<MACHINE> will be returned.
If a matching entry cannot be found, and a default entry exists, then a
reference to the default entry is returned.
If there is no matching entry found and there is no default defined, or
no .netrc file is found, then C<undef> is returned.
=back
=head1 METHODS
=over 4
=item login ()
Return the login id for the netrc entry
=item password ()
Return the password for the netrc entry
=item account ()
Return the account information for the netrc entry
=item lpa ()
Return a list of login, password and account information fir the netrc entry
=back
=head1 AUTHOR
Graham Barr <gbarr@pobox.com>
=head1 SEE ALSO
L<Net::Netrc>
L<Net::Cmd>
=head1 COPYRIGHT
Copyright (c) 1995-1998 Graham Barr. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=cut
|