>>Why shell out to create lockfiles anyway?

I didn't write it, and I don't know Perl very well at all.

>>Why not just do it native say like

sysopen($fh, "$dir/$name", O_CREAT | O_EXCL | O_RDWR, 0600);

[download]

Thanks for supplying the code. I don't know why the person wanted to lock the file. Here is a bigger snippet of what is happening, down to the unlink, which I think is like the "unlock" ?? 

system ("lockfile -2 -r 5 $base_dir/.lock")  == 0
        or diehtml("Lock error: ", $? >> 8, "\n");
        # TODO stop stderr of system

    # create unique suffix
    if (-f "$base_dir/$seq_file") {
        open(SEQ, "+<$base_dir/$seq_file")
            or diehtml("Error opening seq file: $!\n");
        $seq = ;
        seek SEQ, 0, 0;
    } else {
        open(SEQ, ">$base_dir/$seq_file")
            or diehtml("Error creating seq file: $!\n");
        $seq = 0;
    }
    
    $outfile .= sprintf "%7.7d", $seq;
    $ordernumber = $seq;    #store this order no. before 'next' is cal
+c.
    print SEQ ++$seq;
    close SEQ or warn "Something wrong closing seq: $!\n";
    unlink "$base_dir/.lock" or diehtml("Unlock error: $!\n");

    open(ORDERFILE, ">$outfile")
        or diehtml("Can't open order records: $!\n");

    print ORDERFILE @_;
    close ORDERFILE or warn "Something fishy with closing the order: $
+!\n";
}

[download]

The file SEQ, is just a line line ASCII file with the next order number in it.

Peter

In reply to Re: Re: Perl script crashing at lockfile ? by peterr
in thread Perl script crashing at lockfile ? by peterr

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