Having to support many different UNIX platforms is a challenge and a pain in the same time. What commands should I run on each of them for a trivial checkup ? What are the options should I use ? etc. So I came up with a script for the abstraction purposes, where the only think I need is the hostname and the <thing> to check. Because originally this was spin around the FS usage I wrote for this functionality. Now I think it may be expanded to something more generic, but till then I wild like to share it, cause - I find it cool to use.

#!/usr/bin/perl -w
#
# df     Act like UNIX df utility
# usage: run df.pl and follow the text
#
use Net::Ping;
use Net::OpenSSH;
use IO::Socket;

my ($ssh, $rsh) = qw(22 514);
while (1) {
    print "nom du serveur: ";
    chomp(my $server = <STDIN>);
    die "le nom du serveur est obligatoire\n" unless $server;
    print "nom du FS sans le premier / : ";
    chomp(my $fs = <STDIN>);
    die "le nom du FS est obligatoire\n" unless $fs;

    sub os_port {
        foreach (@_) {
            $sock = new IO::Socket::INET(PeerAddr => $server,
                             PeerPort => $_,
                             Proto    => 'tcp');
            last if $sock;
        }
        $sock;
    }

    my $p = Net::Ping->new; #new("icmp")
    if ($p->ping($server)) {
        my $sock = os_port($ssh, $rsh);
        die "Aucune possibilite a se connecte au serveur\n" unless $so
+ck;
        while (<$sock>) {
            $sock_string = $_;
            last;
        }
        close $sock;
    }
    $p->close();

    if ($sock_string) {
        my $openssh = Net::OpenSSH->new($server);

        $openssh->error and
            die "Couldn't establish SSH connection: ". $openssh->error
+;
        chomp(my $uname = $openssh->capture("uname -s"));
            $openssh->error and
                   die "remote uname command failed: " . $openssh->err
+or;
    
        if ($uname =~ /Linux/) {
            $openssh->system("df -h /$fs") or
                   die "remote command failed: " . $openssh->error;
        } elsif ($uname =~ /AIX/) {
            $openssh->system("df -m /$fs") or
                    die "remote command failed: " . $openssh->error;
        } elsif ($uname =~ /HP-UX/) {
            $openssh->system("bdf /$fs") or
                    die "remote command failed: " . $openssh->error;
        } else {
            $openssh->system("df /$fs") or
                    die "remote command failed: " . $openssh->error;
        }    
    } else {
        system "rsh $server bdf /$fs";
    }    
}
[download]

Here it is - AIX, HP-UX and Linux platforms via SSH or Rlogin connections acting as expected in each and every case.

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