量化交易之linux篇 - 《UNIX环境高级编程》 - 捕捉信号SIGINT

#include "apue.h"
#include <stdio.h>
#include <dirent.h>
#include <sys/wait.h>

static void sig_int(int value); // signal catching function

int main(int argc, char* argv[]) {
    char buf[MAXLINE];
    pid_t pidl
    int status;

    if (signal(SIGINT, sig_int) == SIG_ERR)
        err_sys("signal error.");

    printf("%%");

    while (fgets(buf, MAXLINE, stdin) != NULL) {
        if (buf[strlen(buf)-1] == '\n')
            buf[strlen(buf)-1] = 0;

        if ((pid = fork()) < 0) {
            err_sys("fork error");
        } else if ((pid == 0)) {
            execlp(buf, buf, (char *)0);
            err_ret("couldn't exe: %s", buf);
            exit(127);
        }

        if ((pid = waitpid(pid, &status, 0)) < 0)
            err_sys("waitpid error.");
        printf("%%");             
    }

    exit(0);
}


void sig_int(int value) {
    printf("interupt\n");
}