G'day GillSans,

Welcome to the monastery.

I don't have the lsattr command on my OS; however, I can roughly emulate what I think you need. The ls -i command gives "inode filename"; I believe your lsattr command gives "attr filename". Those are close enough to show the technique. In the code below, I've just used splice to force a missing entry such as you get when you encounter a link. 

$ perl -Mstrict -Mwarnings -E '
    chomp(my @lsl = qx{ls -l | tail -3});
    chomp(my @lsi = qx{ls -i | tail -3});
    splice @lsi, 1, 1;
    my $lsi_index = 0;

    for (@lsl) {
        my $file = (split / /)[-1];

        my $pos = index $lsi[$lsi_index], $file;

        if ($pos == -1) {
            say "   N/A   ", $_;
        }
        else {
            say substr($lsi[$lsi_index++], 0, $pos), $_;
        }
    }
'
44060626 -rw-r--r--    1 ken  staff        0 10 Sep 15:02 zz1
   N/A   -rw-r--r--    1 ken  staff        0 10 Sep 15:02 zz2
44060628 -rw-r--r--    1 ken  staff        0 10 Sep 15:03 zz3

[download]

I think you should be able to adapt that to your needs.

Here's what those two commands would normally output on my OS:

$ ls -l | tail -3; ls -i | tail -3
-rw-r--r--    1 ken  staff        0 10 Sep 15:02 zz1
-rw-r--r--    1 ken  staff        0 10 Sep 15:02 zz2
-rw-r--r--    1 ken  staff        0 10 Sep 15:03 zz3
44060626 zz1
44060627 zz2
44060628 zz3

[download]

Update: I had extra whitespace. Removed "join " " =>" which got rid of the extra space, and serendipitously simplified the code example.

-- Ken

In reply to Re: STDERR, preserve order of by kcott
in thread STDERR, preserve order of by GillSans

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