# raise

From cppreference.com
< c‎ | program

Defined in header `<signal.h>` |  |
int raise( int sig ); |  |

Sends signal sig to the program. The signal handler, specified using signal(), is invoked.

If the user-defined signal handling strategy is not set using 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:

SIGABRT SIGFPE SIGILL SIGINT SIGSEGV SIGTERM | defines signal types (macro constant)

### Return value

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

### Example

Run this code

    #include <signal.h>
    #include <stdio.h>

    void signal_handler(int signal)
    {
        printf("Received signal %d\n", signal);
    }

    int main(void)
    {
        // Install a signal handler.
        signal(SIGTERM, signal_handler);

        printf("Sending signal %d\n", SIGTERM);
        raise(SIGTERM);
        printf("Exit main()\n");
    }

Output:

    Sending signal 15
    Received signal 15
    Exit main()

### References

- C11 standard (ISO/IEC 9899:2011):

  - 7.14.2.1 The raise function (p: 267)

- C99 standard (ISO/IEC 9899:1999):

  - 7.14.2.1 The raise function (p: 248)

- C89/C90 standard (ISO/IEC 9899:1990):

  - 4.7.2.1 The raise function

### See also

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

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