raise - C signal.h

Type

function

From

<csignal>

Description

Generates a signal which is handled as specified by function signal.

Prototype

int raise (int sig);

Parameters

Parameter	Description
sig	The signal value to raise.

The following macro constant expressions identify standard signal values:

macro	stands for	signal
SIGABRT	Signal Abort	Abnormal termination.
SIGFPE	Signal Floating-Point Exception	Erroneous arithmetic operation.
SIGILL	Signal Illegal Instruction	due to a corruption in the code or to an attempt to execute data.
SIGINT	Signal Interrupt	Generally generated by the application user.
SIGSEGV	Signal Segmentation Violation	Invalid access to storage when trying to access outside the memory it is allocated for it.
SIGTERM	Signal Terminate	Termination request sent to program.

Return Value

On success, returns zero.

On error, a value different from zero otherwise.

Demo Code


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

sig_atomic_t signaled = 0;//from   ww  w . j  av  a  2 s . c om

void my_handler (int param){
  signaled = 1;
}

int main (){
  void (*prev_handler)(int);

  prev_handler = signal (SIGINT, my_handler);

  raise(SIGINT);

  printf ("signaled is %d.\n",signaled);

  return 0;
}