See my node Calling External Commands More Safely: IMHO on Linux IPC::Run is the best way to manage external commands while your Perl script does something else, like sending that process a signal (as others have pointed out, Ctrl-C is SIGINT):

#!/usr/bin/env perl
use warnings;
use strict;
use IPC::Run qw/start/;

print "Starting trace-cmd...\n";
my @cmd = ('sudo','trace-cmd','record',
    '-p','function','-cP',$$);  # just an example
my $h = start \@cmd, \my $stdin, \my $stdout, \my $stderr;

# wait for trace-cmd to say something before continuing
$h->pump until length $stdout || length $stderr;
#print "<<$stdout||$stderr>>\n";  # just for debugging

# This sleep is just a stand-in for something more complex
print "Waiting 2 seconds...\n";
sleep 2;

print "Sending SIGINT...\n";
$h->signal('INT');

print "Finishing...\n";
$h->finish or die "trace-cmd record returned $?";

print "Done, resetting...\n";
system('sudo','trace-cmd','reset')==0
    or die "trace-cmd reset returned $?";

[download]

In reply to Re: Control C; into a running system / exec? by haukex
in thread Control C; into a running system / exec? by gallagher118

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.