Merge branch 'master' into squeeze

[debian/amanda] / perl / Amanda / Interactivity / stdin.pm

diff --git a/perl/Amanda/Interactivity/stdin.pm b/perl/Amanda/Interactivity/stdin.pm
new file mode 100644 (file)
index 0000000..2b67216
--- /dev/null
+++ b/perl/Amanda/Interactivity/stdin.pm
@@ -0,0 +1,107 @@
+# Copyright (c) 2010 Zmanda, Inc.  All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 as published
+# by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+#
+# Contact information: Zmanda Inc., 465 S. Mathilda Ave., Suite 300
+# Sunnyvale, CA 94085, USA, or: http://www.zmanda.com
+
+package Amanda::Interactivity::stdin;
+
+use strict;
+use warnings;
+use POSIX qw( :errno_h );
+use vars qw( @ISA );
+@ISA = qw( Amanda::Interactivity );
+
+use Amanda::Paths;
+use Amanda::Util;
+use Amanda::Debug qw( debug );
+use Amanda::Changer;
+use Amanda::MainLoop qw( :GIOCondition );
+
+=head1 NAME
+
+Amanda::Interactivity::stdin -- Interactivity class to read user request from stdin
+
+=head1 SYNOPSIS
+
+Amanda::Interactivity class to write user request on stdout and read reply
+from stdin.
+
+=cut
+
+sub new {
+    my $class = shift;
+
+    my $self = {
+       input_src => undef,
+    };
+    return bless ($self, $class);
+}
+
+sub abort {
+    my $self = shift @_;
+
+    if ($self->{'input_src'}) {
+       $self->{'input_src'}->remove();
+       $self->{'input_src'} = undef;
+    }
+}
+
+sub user_request {
+    my $self = shift @_;
+    my %params = @_;
+    my $buffer = "";
+
+    my $message  = $params{'message'};
+    my $label    = $params{'label'};
+    my $err      = $params{'err'};
+    my $chg_name = $params{'chg_name'};
+
+    my $data_in = sub {
+       my $b;
+       my $n_read = POSIX::read(0, $b, 1);
+       if (!defined $n_read) {
+           return if ($! == EINTR);
+           $self->abort();
+           return $params{'request_cb'}->(
+                       Amanda::Changer::Error->new('fatal',
+                               message => "Fail to read from stdin"));
+       } elsif ($n_read == 0) {
+           $self->abort();
+           return $params{'request_cb'}->(
+                       Amanda::Changer::Error->new('fatal',
+                               message => "Aborted by user"));
+       } else {
+           $buffer .= $b;
+           if ($b eq "\n") {
+               my $line = $buffer;
+               chomp $line;
+               $buffer = "";
+               $self->abort();
+               return $params{'request_cb'}->(undef, $line);
+           }
+       }
+    };
+
+    print "$err\n";
+    print "Insert volume labeled '$label' in $chg_name\n";
+    print "and press <enter> enter, or ^D to abort.\n";
+
+    $self->{'input_src'} = Amanda::MainLoop::fd_source(0, $G_IO_IN|$G_IO_HUP|$G_IO_ERR);
+    $self->{'input_src'}->set_callback($data_in);
+    return;
+}
+
+1;