Hi Wind,

Nice coding. Thanks for the tidy up.

I changed it a little. I changed 'die' to 'warn', because I wanted all the possibilities tested, and I only 'closed' where the open had been successful. I didn't know you could write "for .." like that and I've never got around to using the "? .. : .." operator. So thanks for all that.

So:

#!/usr/bin/perl -w
use strict;

for my $i (0..5) {
    my $dir = $i ? "/media/disk-$i/" : "/media/disk/";
    if (opendir my $dh, $dir){ 
        print $dir," opened successfully.\n";
        closedir $dh;
    } else {
        warn "Can't opendir $dir: $!";
    }
}
[download]

So I inserted a USB-drive, ran the code and I got (Sorry, my machine is set to Portuguese. "Arquivo ou diretório não encontrado" means "file or directory not found ... ". ):

Can't opendir /media/disk/: Arquivo ou diretório não encontrado at /ho
+me/image/Documents/Endoscopia/Dir_Test.pl line 10.
Can't opendir /media/disk-1/: Arquivo ou diretório não encontrado at /
+home/image/Documents/Endoscopia/Dir_Test.pl line 10.
Can't opendir /media/disk-2/: Arquivo ou diretório não encontrado at /
+home/image/Documents/Endoscopia/Dir_Test.pl line 10.
Can't opendir /media/disk-3/: Arquivo ou diretório não encontrado at /
+home/image/Documents/Endoscopia/Dir_Test.pl line 10.
Can't opendir /media/disk-4/: Arquivo ou diretório não encontrado at /
+home/image/Documents/Endoscopia/Dir_Test.pl line 10.
Can't opendir /media/disk-5/: Arquivo ou diretório não encontrado at /
+home/image/Documents/Endoscopia/Dir_Test.pl line 10.
[download]

before I used the dolphin file-manager and afterwards I got:

/media/disk/ opened successfully.
Can't opendir /media/disk-1/: Arquivo ou diretório não encontrado at /
+home/image/Documents/Endoscopia/Dir_Test.pl line 10.
Can't opendir /media/disk-2/: Arquivo ou diretório não encontrado at /
+home/image/Documents/Endoscopia/Dir_Test.pl line 10.
Can't opendir /media/disk-3/: Arquivo ou diretório não encontrado at /
+home/image/Documents/Endoscopia/Dir_Test.pl line 10.
Can't opendir /media/disk-4/: Arquivo ou diretório não encontrado at /
+home/image/Documents/Endoscopia/Dir_Test.pl line 10.
Can't opendir /media/disk-5/: Arquivo ou diretório não encontrado at /
+home/image/Documents/Endoscopia/Dir_Test.pl line 10.
[download]

So It looks as though I need to do something else. In fact if I do $dir I get the same result:

$ dir /media/disk/
dir: impossível acessar /media/disk/: Arquivo ou diretório não encontr
+ado
[download]

Thanks again for a great post.

Regards

Steve

maybe you need to use something called dmesg to see diagnostic info like [ 131.981346] hub 1-0:1.0: unable to enumerate USB device on port 4