Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

Hmmm... I would call this a ehm... "cool symlink hack"!! Just an idea though: You may use an actual, existing, file as a target if the system is down for maintenance. So you can put relevant time info in its atime and/or mtime by means of utime. E.g.:

for (my $target=readlink $file) { if (-f) { warn "System is down for maintenance!\n", "Expected to become available again at ", scalar localtime +(stat _)[8], "\n"; } else { print "IP address: $_\n"; } }

Of course this is oversimplified and you would put all sorts of checks you think to be appropriate!

All in all the technique is somewhat awkward in that you use file existence to signal failure. But you're already using a "hanging symlink" to carry info, so...

In reply to Re: Cool symlink hack by blazar
in thread Cool symlink hack by grantm

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, 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, 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.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others exploiting the Monastery: (3)
    As of 2018-05-20 23:31 GMT
    Find Nodes?
      Voting Booth?