SIG_DFL, SIG_IGN

 

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signal raise sig_atomic_t	SIG_DFL SIG_IGN SIG_ERR
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Defined in header <signal.h>
#define SIG_DFL /*implementation defined*/
#define SIG_IGN /*implementation defined*/

The SIG_DFL and SIG_IGN macros expand into integral expressions that are not equal to an address of any function. The macros define signal handling strategies for signal() function.

Constant	Explanation
SIG_DFL	default signal handling
SIF_IGN	signal is ignored

See also

C++ documentation for SIG_DFL, SIG_IGN