p6-22.c

UNIX程序设计教程

#include <stdlib.h>
#include <stdio.h>
#include "err_exit.h"
int main(int argc,char *argv[])
{
    int status;
    if (argc < 2){
         printf("command-line argument required");
         exit(1);
    }
    if ((status = system(argv[1]))<0)
         err_exit("system() error");
    pr_exit(status);
    exit(EXIT_SUCCESS);
}