I have a program A. It launches (fork/exec) program B, which is a perl script. The perl script, in turn, launches program C using system(). I have problem that when A sends a signal (HUP, TERM or QUIT) to B, if C is running, it continues to run. I want to stop both B & C "on demand". I have tried using the following snipit in B. C seems to faithfully respond to HUP everytime I've tried. 
sub cleanup
{
    $SIG{HUP}='IGNORE';
    kill (HUP,-$$);
    exit -1;
}
$SIG{HUP}='cleanup';
$SIG{TERM}='cleanup';
$SIG{QUIT}='cleanup';

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I have very repeatable situation where C will not terminate when B does. I've tried a number of variations unsuccessfully. Ideas?

In reply to Signal Handling, with system by dcorbin

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