Defined in header <csignal>
int raise( int sig );

Sends signal sig to the program. The signal handler (specified using the std::signal() function) is invoked.

If the user-defined signal handling strategy is not set using std::signal() yet, it is implementation-defined whether the signal will be ignored or default handler will be invoked.


sig - the signal to be sent. It can be an implementation-defined value or one of the following values:
defines signal types
(macro constant)

Return value

​0​ upon success, non-zero value on failure.


#include <csignal>
#include <iostream>
void signal_handler(int signal)
    std::cout << "Received signal " << signal << '\n';
int main()
    // Install a signal handler
    std::signal(SIGTERM, signal_handler);
    std::cout << "Sending signal " << SIGTERM << '\n';

Possible output:

Sending signal 15
Received signal 15

See also

sets a signal handler for particular signal
C documentation for raise

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