#!/usr/bin/perl -w

use POSIX;

eval 'sub O_NDELAY () { &O_NONBLOCK;}' unless defined(&O_NDELAY);
eval 'sub TCFLSH () {0x540b;}' unless defined(&TCFLSH);
eval 'sub TIOCSTI () {0x5412;}' unless defined(&TIOCSTI);

if(@ARGV < 2) {
   print "usage : force <device> <command string>\n";
   exit;
}
 
$Device = shift(@ARGV);
$Command = join(' ',@ARGV);

sysopen($DEVICE,$Device,&O_NDELAY|O_RDWR)||die "cannot open device '$D
+evice' : $!\n";

if(ioctl($DEVICE,&TCFLSH,0) < 0) {
   print "ioctl TCFLSH error on '$Device' : $!\n";
}
 
foreach $Char (split(//,"$Command\n")) {
   if(!(ioctl($DEVICE,&TIOCSTI,$Char))) {
      print "ioctl TIOCSTI error on '$Device': $!\n";
   }
}
close($DEVICE)||die "cannot close device '$Device' : $!\n";

[download]

In reply to force.pl by ixo111

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.