systest2.c

unix环境高级编程的源代码

#include    <sys/types.h>
#include    <signal.h>
#include    "ourhdr.h"

static void    sig_int(int), sig_chld(int);

int
main(void)
{
    int        status;

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

    if ( (status = system("/bin/ed")) < 0)
        err_sys("system() error");
    exit(0);
}

static void
sig_int(int signo)
{
    printf("caught SIGINT\n");
    return;
}

static void
sig_chld(int signo)
{
    printf("caught SIGCHLD\n");
    return;
}