signal Action Constants
The action taken when the interrupt signal is received depends on the value of func.
The func argument must be either a function address or one of the manifest constants listed below and defined in SIGNAL.H.
Uses system-default response. If the calling program uses stream I/O, buffers created by the run-time library are not flushed.
Ignores interrupt signal. This value should never be given for SIGFPE, since the floating-point state of the process is left undefined.
Indicates an error occurred in the signal.
Indicates an acknowledgement was received.
A return type from a signal indicating an error has occurred.