$action=POSIX::SigAction->new('doSigHup',$sigset,&POSIX::SA_NODEFER);
Note that you are setting up an "unsafe" signal, as opposed to Safe Signal that original poster was using. Furthermore, the use of SA_NODEFER to avoid changes to sigprocmask has the unfortunate side-effect of making your handler re-interruptable from within its own signal handler.

Altogether, a particularly nasty concoction that may eventually result in data corruption. I'd rather advise to just clear the blocked signal at program (re)start, after the handler is assigned of course.

In reply to Re^4: Why this daemon can only receive the HUP signal no more than one time? by Anonymous Monk
in thread Why this daemon can only receive the HUP signal no more than one time? by sunshine_august

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