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POSIX sigaction might give you access to the pid, BUT the docs say it's not often implemented

sigaction Detailed signal management. This uses POSIX::SigAction objects for + the action and oldaction arguments (the oldaction can also be just a + hash reference). Consult your system's sigaction manpage for details +, see also POSIX::SigRt. ... The following are also defined by POSIX/SUSv3, but unfortunately not v +ery widely implemented: pid the process id generating the signal uid the uid of the process id generating the signal status exit value or signal for SIGCHLD band band event for SIGPOLL

In reply to Re^2: Getting the source of a signal by RichardK
in thread Getting the source of a signal by nitin1704

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