The value returned by system is composed of three fields. The exit value of the subprocess is $rv >> 8, $rv & 127 gives the signal (if any) from which the process died, and $rv & 128 reports whether or not there was a core dump.

In reply to Re^3: Get parent process to handle signals for its children? by ikegami
in thread Get parent process to handle signals for its children? by slaniel

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