showmount.c

非常高效的扫描器

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <signal.h>


showmount(char *host)
{
time_t timev, timecheck;
pid_t pid;
time(&timev);
pid = fork();
if (pid != 0) {
   wait();
  kill(pid, SIGINT);
   return;
   }

if(pid == 0)
{
 execl("/usr/sbin/showmount", "showmount", "-e", host, NULL);
 while(1)
 {
   time(&timecheck);
   if (timecheck == (timev + 4))
     {
     kill(pid, SIGALRM);
     return;
     }
 }
}

}