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# $OpenBSD: Remote.pm,v 1.4 2016/05/03 19:13:04 bluhm Exp $
# Copyright (c) 2010-2014 Alexander Bluhm <bluhm@openbsd.org>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
use strict;
use warnings;
package Remote;
use parent 'Proc';
use Carp;
use Cwd;
use File::Basename;
sub new {
my $class = shift;
my %args = @_;
$args{logfile} ||= "remote.log";
$args{up} ||= "Started";
$args{func} = sub { Carp::confess "$class func may not be called" };
$args{remotessh}
or croak "$class remote ssh host not given";
$args{forward}
or croak "$class forward not given";
my $self = Proc::new($class, %args);
$self->{listenaddr}
or croak "$class listen addr not given";
$self->{connectaddr}
or croak "$class connect addr not given";
$self->{connectport}
or croak "$class connect port not given";
return $self;
}
sub up {
my $self = Proc::up(shift, @_);
my $timeout = shift || 10;
my $lsock = $self->loggrep(qr/^listen sock: /, $timeout)
or croak ref($self), " no listen sock in $self->{logfile} ".
"after $timeout seconds";
my($addr, $port) = $lsock =~ /: (\S+) (\S+)$/
or croak ref($self), " no listen addr and port in $self->{logfile}";
$self->{listenaddr} = $addr;
$self->{listenport} = $port;
return $self;
}
sub child {
my $self = shift;
print STDERR $self->{up}, "\n";
my @opts = $ENV{SSH_OPTIONS} ? split(' ', $ENV{SSH_OPTIONS}) : ();
my $dir = dirname($0);
$dir = getcwd() if ! $dir || $dir eq ".";
my @cmd = ("ssh", "-n", @opts, $self->{remotessh}, "perl",
"-I", "$dir/..", "$dir/".basename($0), $self->{forward},
$self->{listenaddr}, $self->{connectaddr}, $self->{connectport},
($self->{testfile} ? "$dir/".basename($self->{testfile}) : ()));
print STDERR "execute: @cmd\n";
exec @cmd;
die ref($self), " exec '@cmd' failed: $!";
}
1;
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