I wrote a Windows keyboard handler by the aid of module Win32::Console. I capture $SIG{INT} because ctrl-C shall be received as a normal character, which works fine.

However, when I call my perl program from a Windows batch, the latter at termination of the perl subtask asks whether the batch shall be terminated. The interrupt is ignored by the perl program but it's still there.

How can I flush the interrupt, not just ignore it?

Sample code illustrating the problem: 

use Win32::Console;
$keyboard = Win32::Console->new(STD_INPUT_HANDLE);
$SIG{'INT'} = sub { print "Gotcha!\n"; exit 0 };
$| = 1; # autoflush input
print("Press ctrl-C to exit\n");
while (1) {
    @in = $keyboard->Input();
    print(chr($in[5])) if $in[1];
}

[download]
Now call the perl program, e.g. named "sigint.pl", from a batch program "sigint.bat" set up as follows: 
@echo off
perl sigint.pl

[download]
Thanks for any hint and best regards
herqles

In reply to How to Flush SIGINT on Win32? by herqles

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.