p8-19.c

SUN Solaris8平台下进程间通信

#include <signal.h>
#include <stdio.h>     
struct two_words { int a, b; } memory;     
void handler(int signum)
{
    printf ("%d,%d\n", memory.a, memory.b);
    alarm (1);
}
int main (void)
{
    static struct two_words zeros = { 0, 0 }, ones = { 1, 1 };
    signal (SIGALRM, handler);
    memory = zeros;
    alarm (1);
    while (1){          
        memory = zeros;
        memory = ones;
    }
}