ssh-sftp-perl-users

[Ssh-sftp-perl-users] How to execute ssh command in background ?

[Jean-Paul Le F. <le...@he...>]

ssh(1) provides the option -f used to request
execution in background. I would like to have
this possibility with Net::SSH::Perl.

I need a perl script to launch the same command
on several remote hosts, something like :

    foreach $host (@grid)
        $ssh->cmd($my_command);

However, doing so, the script stays blocked on
the first step and does not process the next
items in the list.

I've tried to add '&' in various places but
unsuccessfully.

P.S.
my_command is rmiregistry.


-- 
___________________________________________________________________

Jean-Paul Le Fèvre  * Mail : Le...@fo...

Re: [Ssh-sftp-perl-users] How to execute ssh command in background ?

[Mark F. <mar...@ea...>]

I use Perl's "fork" function. Put the following in a subroutine and call
this subroutine from your "foreach" loop. If you need to avoid zombies,
you'll have to use "$SIG{CHLD}= 'IGNORE'" (or refer to a subroutine which
will "waitpid" to harvest the children.)

============================
my $childPid = fork;   # fork a new copy of script
if ($childPid) {
  return;              # parent returns
}
if (!defined($childPid)) {
  print STDERR 'Fork failed.' . "\n";
  exit 99;
}

# do your ssh command here

exit; # child exits, do *not* return
=============================

Mark

----- Original Message ----- 
From: "Jean-Paul Le Fèvre" <le...@he...>
To: <ssh...@li...>
Sent: Thursday, March 11, 2004 2:45 AM
Subject: [Ssh-sftp-perl-users] How to execute ssh command in background ?


>
>
> ssh(1) provides the option -f used to request
> execution in background. I would like to have
> this possibility with Net::SSH::Perl.
>
> I need a perl script to launch the same command
> on several remote hosts, something like :
>
>     foreach $host (@grid)
>         $ssh->cmd($my_command);
>
> However, doing so, the script stays blocked on
> the first step and does not process the next
> items in the list.
>
> I've tried to add '&' in various places but
> unsuccessfully.
>
> P.S.
> my_command is rmiregistry.
>
>
> -- 
> ___________________________________________________________________
>
> Jean-Paul Le Fèvre  * Mail : Le...@fo...
>
>
>
>
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