3-17.c

最新rtlinux内核源码

/*
 * Test case for assertion #3 of the sigaction system call that shows
 * calling sigaction with a null act argument does not change the 
 * signal handler.
 *
 * Steps:
 * 1. Initialize global variable to indicate handler has not been called
 * 2. Set the signal handler for SIGUSR1 to handler
 * 3. Call sigaction with a null act
 * 4. raise SIGUSR1 
 * 5. Verify handler was called.
*/

#include <signal.h>
#include "compat.h"

#define NTASKS 1
static pthread_t thread[NTASKS];
int handler_called = 0;

void handler(int signo)
{
	handler_called = 1;
}

void * th_code (void *arg)
{
	struct sigaction act;
	struct sigaction oact;
	
	act.sa_handler = handler;
	act.sa_flags = 0;
	sigemptyset(&act.sa_mask);
	if (sigaction(SIGUSR1,  &act, 0) == -1) {
		perror("Unexpected error while attempting to setup test "
		       "pre-conditions");
		return NULL;
	}
	
	if (sigaction(SIGUSR1,  0, &oact) == -1) {
		perror("Unexpected error while attempting to setup test "
		       "pre-conditions");
		return NULL;
	}


	if (raise(SIGUSR1) == -1) {
		perror("Unexpected error while attempting to setup test "
		       "pre-conditions");
		return NULL;
	}

	if (handler_called) {
		printf("Test PASSED\n");
		return 0;
	}

	printf("Test FAILED\n");
	return NULL;	
}



int init_module(void){
  int i;

  for(i=0;i<NTASKS;i++)
    pthread_create(&thread[i], NULL,th_code,(void *) i);

  return 0;  
}

void cleanup_module(void){
 int i;

  for(i=0;i<NTASKS;i++)
    pthread_delete_np(thread[i]);

}