I am trying to use alarm() to log/send email/open ticket after a process has been running for a certain amount of time: 
  local $SIG{ALRM} = sub {
    write_log('TIMEOUT ALERT');
  };
  alarm 20;
  my ($run_ok, undef, $full_buf, undef, undef) = run(command => $cmd);
  alarm 0;

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This is using IPC::Run to run the command. I am running many commands, some taking more than 20 seconds but the message "TIMEOUT ALERT" never appears in the log and all commands run to completion as normal. I don't want to kill anything (contrary to most alarm() examples I find), I just want to let the command run but send some warning somewhere if it takes X amount of time. Is there something obviously wrong here?

In reply to $SIG{ALRM} to just log something? by philkime

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