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  1. or download this
    warn "PID $$ (parent) forking\n";
unless ($pid = fork) {
...
warn "PID $$ (parent) executing waitpid\n";
waitpid($pid,0);
warn "PID $$ (parent) done.\n";
  2. or download this
    warn "PID $$ (parent) forking\n";
unless ($pid = fork) {
...
warn "PID $$ (parent) executing waitpid\n";
waitpid($pid,0);
warn "PID $$ (parent) done.\n";