Throwing together some code recently, I needed a log function that would keep a file handle open and scoped to itself. I've since found it useful in several places. If you find an reasons *not* to do something like this, please post!

c
#!/usr/bin/perl

use warnings;
use strict;

my $log_file = createLog(time() . '.log');

$log_file->("$0 Initialized");



sub createLog {
    my $log_file = shift;

    open my $log_handle, ">$log_file" or die "Log file creation failed
+: [$!]\n";
    select((select($log_handle), $| = 1)[0]);

    return sub {
        my $msg  = shift;
        my $time = scalar(localtime());
           $msg  = "BGN[$time]\n$msg\nEND[$time]\n\n";
        if (fileno $log_handle) {
            print $log_handle $msg;
        }
        else {
            warn "Log file closed: $msg";
        }
        return;
    }
}

[download]

In reply to Log Closure by cmilfo

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.