Based on Re: Can't catch signals after an exec?, change your code 
$SIG{HUP} = \&doSigHup;

[download]
to: 
use POSIX ();
$sigset=POSIX::SigSet->new();
$action=POSIX::SigAction->new('doSigHup',$sigset,&POSIX::SA_NODEFER);
POSIX::sigaction(&POSIX::SIGHUP, $action);

[download]

In reply to Re^3: Why this daemon can only receive the HUP signal no more than one time? by lifeboat
in thread Why this daemon can only receive the HUP signal no more than one time? by sunshine_august

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