Add xCAT::SSH to help ssh-ify blade.pm to cope with CMMs that do not do telnet by default

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@12059 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/lib/perl/xCAT/SSH.pm

@@ -0,0 +1,55 @@
+package xCAT::SSH;
+use Exporter;
+use Net::Telnet;
+use strict;
+our @ISA = qw/Exporter Net::Telnet/;
+our @EXPORT_OK = ();
+use IO::Pty;
+use POSIX;
+
+sub _startssh {
+	my $pty = shift;
+	my $name = shift;
+	my $dest = shift;
+	my $tty;
+	my $tty_fd;
+	my $pid = fork();
+	if ($pid) {
+		return;
+	}
+	#in child
+	$tty = $pty->slave or die "$!";
+	$tty_fd = $tty->fileno or die "$!";
+	close($pty);
+	open STDIN, "<&", $tty_fd;
+	open STDOUT,">&",$tty_fd;
+	$pty->make_slave_controlling_terminal();
+	close($tty);
+	exec ("ssh","-o","StrictHostKeyChecking=no","-l",$name,$dest);
+}
+
+sub new {
+	my $class = shift;
+	my %args = @_;
+	my $pty = IO::Pty->new or die "Unable to perform ssh: $!";
+	$args{"-fhopen"} = $pty;
+	$args{"-telnetmode"} = 0;
+	$args{"-telnetmode"} = 0;
+	$args{"-cmd_remove_mode"} = 1;
+	my $username = $args{"-username"};
+	my $host = $args{"-host"};
+	my $password = $args{"-password"};
+	delete $args{"-host"};
+	delete $args{"-username"};
+	delete $args{"-password"};
+	my $self = Net::Telnet->new(%args);
+	_startssh($pty,$username,$host);
+	$self->waitfor("-match" => '/password:/i', -errmode => "return") or die "Unable to reach host ",$self->lastline;
+	$self->print($password);
+	my $nextline = $self->getline();
+	if ($nextline =~ /^password:/ or $nextline =~ /Permission denieid, please try again/) {
+		die "Incorrect Password";
+	}
+	return bless($self,$class);
+}
+1;