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Chapter 9. Signals > Sending a Signal with a Payload
9.8. Sending a Signal with a Payload
As we saw in the previous section, signal handlers registered with the SA_SIGINFO flag are passed a siginfo_t parameter. This structure contains a field named si_value, which is an optional payload passed from the signal generator to the signal receiver.
The sigqueue( ) function, defined by POSIX, allows a process to send a signal with this payload:
