Hello,

I'm implementing a simple logging module for a project but ran into a problem which is probably easy to fix.

I open a filehandle to the logfile which remains open until the long-running process ends. However, the logfile may be removed by another non-Perl process (so a file lock doesn't help here). After this happened, the printing to the filehandle still returns 1 but the file is not recreated again. Here's in short my problem: 
use strict;
use warnings;

my $filename = 'logfile.txt';

open(my $handle, '>>', $filename) or die;
unlink($filename);
print $handle "First line\n";
syswrite($handle, "Second line\n");
close($handle);

[download]
Is there a solution so I can detect that the file does not exists anymore? Both print and syswrite report no errors. Ofcourse I could use (-e $filename) but there's always this chance that the file is removed between the test and the print.

I can use other logging modules out there, but prefer to use my own light-weight module for simple logging.

Any help is as always appreciated! Cheers

In reply to Logging to a filehandle of a deleted file by Marcello

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.