Hi Monks, I wanted to run commands on remote computer & wanted this automated. So decided to use Perl's IPC::Run module alongwith rlogin.
Here is the script : 
#!/usr/local/bin/perl
use strict;

if (@ARGV < 2) {
        usage();
}

open (OUT, ">out.log") or die "out.log: $!\n";
select((select(OUT), $|=1)[0]);
open (ERR, ">err.log") or die "err.log: $!\n";
select((select(ERR), $|=1)[0]);

my $username = 'abc';          # username
my $password = 'abc';        # password

my $host = shift @ARGV;
my @commands_to_run = @ARGV;

use IPC::Run qw( start pump finish timeout );

my @startup = ('rlogin', $host, '-l', $username,);

my ($in, $out, $err, $h) = ();
my $h = start \@startup, \$in, \$out, \$err;

$h->pump until ($out =~ /password:/i);
$in = "$password\n";
$h->pump until ($out =~ /\[.+\]/);
print "Logged into $host as $username\n";
print "Running commands:\n";
foreach my $cmd (@commands_to_run) {
        print "\t$cmd\n";
        print OUT "STDOUT of $cmd ->\n";
        print ERR "STDERR of $cmd ->\n";
        $in = "$cmd\n";
        do {
                $h->pump;
                print OUT "$out\n";
                print ERR "$err\n";
        } until ($out =~ m!\[.+\]!);
        print OUT "\n\n";
        print ERR "\n\n";
}
$in = "exit\n";

close OUT;
close ERR;

print "Loged Out\nDone!\n";

sub usage {
     print "perl $0 <hostname> <list of commands to run>\n";
     print "Example:\n";
     die "\tperl $0 host-name "cat /etc/crontab" "cat /path/to/file"\n
+";
}

[download]
When I execute above script it does not come past the first
until($out =~ /\[.+\]/)
statement.
The reason I use this until statement is to detect that I have a shell prompt before I execute other commands.

Am I doing anything wrong ? Do suggest if there is any alternative to automate my requirement.
Thanks

My Perl Blog -> http://techdiary-viki.blogspot.com

In reply to Question on IPC::Run by Viki@Stag

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