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

void handler(int);

int
main(void)
{
int i;

int pid = getpid();

for (i=1; i<50; i++) {
    if (i == 9) {
         printf("can not catch sig number 9 (KILL)\n");
         continue;
    }
    if (i == 23) {
         printf("can not catch sig number 23 (STOP)\n");
         continue;
    }
    if (signal(i, handler) == SIG_ERR) {
        fprintf(stderr, "cannot set handler for %d\n", i);
        exit(-1);
    }
    sleep(1);
    kill (pid, i);
}


}

void
handler(int sig)
{
    printf("sig number: %d ", sig);
    fflush(stdout);
    psignal(sig, "sig name");
}