sigaction.c

linux下网络编程的函数

#include<unistd.h>
#include<signal.h>
void show_handler(struct sigaction * act)
{
switch (act->sa_flags)
{
case 'SIG_DFL':
printf("Default action\n");break;
case 'SIG_IGN':
printf("Ignore the signal\n");break;
default:
printf("0x%x\n",act->sa_handler);
}
}
main()
{
int i;
struct sigaction act,oldact;
act.sa_handler=show_handler;
act.sa_flags = SA_ONESHOT|SA_NOMASK;
sigaction(SIGUSR1,&act,&oldact);
for(i=5;i<15;i++)
{
printf("sa_handler of signal %2d =",i);
sigaction(i,NULL,&oldact);
}
}