std::raise

 

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unreachable (C++23)
Communicating with the environment
system	getenv
Signals
signal raise sig_atomic_t	SIG_DFLSIG_IGN SIG_ERR
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SIGABRTSIGFPESIGILL	SIGINTSIGSEGVSIGTERM
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setjmp	longjmp
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jmp_buf

 

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.

Parameters

sig

-

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

Return value

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

Example

Run this code

#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';
    std::raise(SIGTERM);
}

Possible output:

Sending signal 15
Received signal 15

See also

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