Here's the code 

#!/bin/perl -w

my $pid = fork();
if ($pid) {
        print "PARENT --" . "\n";
        waitpid(-1, 0) ;
        print "-- PARENT " . "\n";
} elsif ( $pid == 0 ) {
        print "CHILD --" . "\n";
}
print "PID - $pid , MAIN PRG --" . "\n";

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Child is able to execute this line of code  print "PID - $pid , MAIN PRG --" . "\n"; - that it shouldn't be.

Here's the output - 

PARENT --
CHILD --
PID - 0 , MAIN PRG --
-- PARENT
PID - 53784 , MAIN PRG --

[download]
Can you please explain ? Is something wrong here ? how to solve this ?

In reply to fork - child executes code outside of block by cyadav

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