I'm on a linux machine. I have a script called B, which runs another Perl script called C. The trimmed version is 
    #!/usr/bin/perl
    if (!fork() { system("C"); sleep(100000); }
    sleep(100000);

[download]

If I run B and kill it with a CTRL-C, that also kills C. However, if I kill B with the unix "kill PID" command, it doesn't kill C. What I really want to do is call B from another Perl script A, and A kills B (with system("kill PID") or whatever), thereby killing C as well.

My question, how can I kill script B from script A, and also have it kill C?

I know I can keep track of the PIDs for C in this simple example, and then kill those PIDs. However, in my real program, that would get very complex and I'd just like a simple way to kill B, and have all of B's sub-processes killed also (like with CTRL-C). Is this possible?

In reply to Stopping subprocesses by James Board

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.