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#include<stdlib.h>
void main()
{
 int i;
 int count=0;
 while(1)
 {
  i=system("ping -c 1 10.27.60.122");
  printf("\ni=%d",i);
  count++;
  if(i==0)
  {
   i=system("settop install;settop odtest.out");
   break;  
  }
  if(count>3)
  {
   printf("\n error cannot reach 10.27.60.122");
   system("cd /root;ls;settop install;settop odtest.out");
   break;
  }
 }
}
·½·¨¶þ¡¢
/*
 *   P I N G . C
 *
 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
 * measure round-trip-delays and packet loss across network paths.
 *
 * Author -
 * Mike Muuss
 * U. S. Army Ballistic Research Laboratory
 * December, 1983
 * Modified at Uc Berkeley
 *
 * Changed argument to inet_ntoa() to be struct in_addr instead of u_long
 * DFM BRL 1992
 *
 * Status -
 * Public Domain.  Distribution Unlimited.
 *
 * Bugs -
 * More statistics could always be gathered.
 * This program has to run SUID to ROOT to access the ICMP socket.
 */
#include <stdio.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h&g


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