SIG_ERR

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Utilities library
General utilities
Relational operators (deprecated in C++20)
 
 
Defined in header <csignal>
#define SIG_ERR /* implementation defined */

A value of type void (*)(int). When returned by std::signal, indicates that an error has occurred.

See also

sets a signal handler for particular signal
(function)
C documentation for SIG_ERR