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+# 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